Bitcoin Buy, Borrow, Die: The Wealth Transfer Strategy the IRS Hasn't Closed

The most powerful wealth transfer strategy in Bitcoin isn't a trust or a GRAT. It's three verbs: buy, borrow, die. Hold Bitcoin, borrow against it for liquidity, and at death the stepped-up basis at death eliminates every capital gain that accumulated over decades. Your heirs pay off the loan from stepped-up Bitcoin. Nobody ever pays capital gains tax.

That sentence — "nobody ever pays capital gains tax" — is why this strategy attracts both extraordinary interest and extraordinary scrutiny. It is entirely legal. It exploits the intersection of two settled tax principles: loans are not taxable income, and death resets cost basis to fair market value. Together, they create a permanent, compounding arbitrage between the cost of borrowing money and the cost of selling appreciated assets.

For Bitcoin holders specifically, buy-borrow-die may be the single most impactful planning technique available. The strategy isn't new — ultra-wealthy families have used it with stocks, real estate, and art for decades. But Bitcoin's unique properties make it structurally superior collateral for this approach. Here is how it works, what it actually costs, when it makes sense, and when the math turns against you.

The Three Phases of Buy, Borrow, Die

The strategy operates across three distinct phases, each exploiting a different feature of the tax code. Understanding each phase — and the specific tax mechanics that power it — is essential before committing capital to this approach.

Phase 1: Buy — Accumulate and Never Sell

The first phase is deceptively simple: acquire Bitcoin and hold it indefinitely. No selling. No rebalancing. No "taking profits." Every dollar of Bitcoin you hold is a dollar of unrealized capital gain that the IRS cannot touch until you dispose of it.

You acquired Bitcoin — early, consistently, or both. You have a low cost basis and a large unrealized gain. Selling to fund living expenses, real estate, or business ventures would trigger long-term capital gains tax of up to 23.8% federally (20% + 3.8% net investment income tax), plus state taxes in most jurisdictions. In a state like California, the combined rate exceeds 37%. In Oregon, it reaches 33%.

The strategy begins by not selling. Holding preserves the unrealized gain as potential step-up value at death — the "prize" you're protecting. Every year you don't sell, the deferred tax liability grows larger, and the eventual benefit of the step-up grows proportionally.

This isn't passive inaction. It's an active decision to let the tax code's asymmetry work in your favor. Unrealized gains compound tax-free. Realized gains compound after a 20–37% haircut. Over a 20-year holding period, the difference between compounding $1 million pre-tax versus post-tax at even modest growth rates is measured in millions.

The discipline required is real. You will watch Bitcoin positions worth enough to change your life — buy a house, fund a business, retire early — and you will not sell them. The borrow phase solves the liquidity problem that makes holding psychologically difficult.

Phase 2: Borrow — Access Liquidity Without Triggering Gains

You pledge your Bitcoin as collateral with a qualified lender and draw a secured loan. The proceeds are cash — not taxable income under §61 of the Internal Revenue Code, because there is a corresponding liability. You can spend that cash on anything: living expenses, real estate, business investment, charitable giving, education, or funding a trust.

This is the fulcrum of the entire strategy. A loan is not a disposition. Pledging an asset as collateral is not a sale, exchange, or other taxable event. The IRS recognizes this fundamental distinction: when you borrow, you receive cash but you also take on an obligation to repay it. There is no net enrichment — no income — until the loan is forgiven or the collateral is sold.

The critical insight: you've converted an illiquid, highly appreciated Bitcoin position into spendable cash without triggering any tax event whatsoever. The Bitcoin remains yours. The unrealized gain remains unrealized. The clock toward the step-up at death continues running.

The interest on the loan is a real cost. Whether that interest is deductible depends on use: interest on funds used for investment purposes is potentially deductible under IRC §163(d); interest on personal expenses is not. Many borrowers use proceeds for investment purposes specifically to preserve the deduction.

Sophisticated borrowers treat the loan as a liquidity bridge, not a permanent financing structure. They borrow for specific purposes — a real estate purchase, a business investment, a trust funding — and repay from operating income, rental cash flow, or other non-Bitcoin sources when possible. The goal is to keep the loan balance manageable while the underlying Bitcoin position continues to appreciate toward an ever-larger step-up.

Phase 3: Die — The Step-Up Erases Everything

At death, IRC §1014 resets the cost basis of all inherited assets — including Bitcoin — to fair market value on the date of death (or, if elected, six months later under the alternate valuation date). The accrued capital gain disappears entirely.

Your heirs inherit Bitcoin with a basis equal to the current price. They sell enough to retire the loan. Tax owed on the sale: zero, because their basis equals the proceeds. The loan principal — which reduced your estate dollar-for-dollar — vanishes. The net result: the family captured decades of Bitcoin appreciation without ever paying capital gains tax.

Consider the full lifecycle: you bought Bitcoin at $5,000. It appreciated to $200,000. You borrowed $80,000 against it (40% LTV). You spent the $80,000 on whatever you needed. You died. Your heirs inherited Bitcoin with a $200,000 basis. They sold $80,000 worth at that stepped-up basis — zero gain, zero tax — and paid off the loan. The remaining Bitcoin stays in the family with a $200,000 basis. The $195,000 per-coin gain you accumulated over your lifetime? The IRS never collected a dollar of tax on it.

This is not a loophole. It is the predictable result of two longstanding provisions of the tax code operating exactly as designed. Congress has been aware of this interaction for decades.

Why Buy, Borrow, Die Works Better for Bitcoin Than Stocks

The ultra-wealthy have used buy-borrow-die with equities and real estate for generations. But Bitcoin has several structural properties that make it a superior asset for this strategy. These aren't marketing claims — they're features of the asset's design that interact favorably with the tax code.

No Dividends, No Forced Income Recognition

Stocks that pay dividends create taxable income events every quarter, regardless of whether you sell. If you hold $5 million in dividend-paying equities yielding 2%, you recognize $100,000 in taxable income annually — even though you haven't sold a single share. That income is taxed at up to 23.8% (qualified dividends) or 37% (ordinary income for non-qualified dividends). Over 20 years, dividend taxes alone could consume hundreds of thousands of dollars that would otherwise compound.

Bitcoin pays no dividends. It generates zero taxable income while you hold it. The entire return is unrealized capital appreciation — which, under buy-borrow-die, is never realized. The tax-free compounding advantage of a non-yielding asset in this strategy context is mathematically significant over multi-decade holding periods.

No Wash Sale Rule

Under IRC §1091, if you sell a stock at a loss and repurchase a "substantially identical" security within 30 days, the loss is disallowed. This wash sale rule constrains tax-loss harvesting for equities. Bitcoin is not classified as a security under current tax law, and the wash sale rule does not apply to it. While this matters more for tax-loss harvesting than for buy-borrow-die specifically, it gives Bitcoin holders more tactical flexibility in managing their positions around the collateral loan.

Extreme Appreciation Potential

The value of the step-up at death is proportional to the unrealized gain at the time of death. An asset that appreciates 10x creates a step-up that eliminates 10x worth of gains. An asset that appreciates 100x eliminates 100x. Bitcoin's historical trajectory — and the reasonable case for continued appreciation based on its fixed supply, increasing institutional adoption, and monetary premium accrual — means the step-up value for a long-term Bitcoin holder could be orders of magnitude larger than for a comparable equity position.

A stockholder who bought $100,000 of the S&P 500 in 2010 might have $500,000 by 2026. A Bitcoin buyer who deployed $100,000 in 2010 has a position measured in hundreds of millions. The step-up that wipes the slate clean at death eliminates a proportionally larger tax bill for the Bitcoin holder.

24/7 Markets and Global Collateral Flexibility

Bitcoin trades 24 hours a day, 7 days a week, globally. Margin calls can be addressed at any time — not just during NYSE business hours. Bitcoin collateral can be managed, transferred, and verified in real time. For a borrower managing a leveraged position against volatile collateral, this always-on visibility and response capability matters.

Direct Custody Eliminates Intermediary Risk (Partially)

With stocks, collateral must be held through a broker or custodian — you can never hold the underlying equity directly. Bitcoin can be self-custodied, and lenders like Unchained Capital use multisig structures where the borrower retains one key. This doesn't eliminate risk, but it provides a layer of control and transparency that simply doesn't exist in traditional securities lending.

The Numbers: A Real Example

Consider a family that accumulated 20 Bitcoin in 2017–2019 at an average cost of $8,000 per coin ($160,000 total basis). By 2026, that position is worth approximately $2 million. Unrealized gain: $1,840,000. If they sold to fund a home purchase:

• Federal long-term capital gains at 23.8%: $437,920
• Oregon state income tax at 9.9%: $182,160
• Total tax on sale: $620,080 — 31% of gross proceeds gone before they close on the house

Instead, they pledge the Bitcoin and borrow $1 million at 9% interest, secured against their Bitcoin at 50% LTV. They buy the house. Annual interest cost: $90,000. If they hold the loan for 10 years before dying:

• Total interest paid (pre-tax): $900,000
• Capital gains tax avoided at death via step-up: $620,080
• Net advantage of borrowing: $620,080 avoided minus $900,000 interest = -$279,920

In this case, selling was cheaper than borrowing for a decade. But this analysis is static — it ignores what happens to the Bitcoin during those 10 years. If Bitcoin doubles (entirely plausible over a decade), the step-up value at death isn't $620,080 — it's over $1.2 million. The 20 Bitcoin are now worth $4 million, the cost basis is still $160,000, and the avoided tax at death is now $1.24 million. Suddenly, the $900,000 in interest was a bargain.

The strategy works best as a liquidity bridge — not a permanent financing structure. Borrow for 1–5 years. Use proceeds productively. Repay from other assets if possible. Let the step-up at death clean up any remaining balance.

Bitcoin-Collateralized Lending: The Lender Landscape in 2026

The Bitcoin lending landscape has changed significantly since 2022. BlockFi is gone. Celsius is bankrupt. Genesis defaulted. What remains is smaller, more conservative, and mostly focused on institutional or high-net-worth clients. The survivors are the lenders who understood collateral management. The casualties are the ones who used deposits for unsecured lending, directional trading, or yield farming.

Coinbase Bitcoin Credit Line

Coinbase launched a Bitcoin-backed credit line offering qualifying U.S. customers the ability to borrow against their Bitcoin holdings directly within the Coinbase platform. The appeal is convenience and regulatory clarity — Coinbase is a publicly traded, U.S.-regulated entity. The trade-off: your Bitcoin is held in Coinbase custody with no multisig arrangement. You're trusting a single counterparty with your collateral.

Unchained Capital: The Multisig Standard

Unchained Capital's 2-of-3 multisig structure is notable: the borrower holds one key, Unchained holds one, and a trusted third-party keymaster holds one. Liquidation requires 2 of 3 signatures. This is meaningfully different from handing Bitcoin to a centralized custodian — you retain partial control and visibility, and you cannot be unilaterally liquidated without your participation (or your keymaster's).

For a buy-borrow-die strategy executed over years or decades, the custody model matters enormously. You are not just trusting the lender to hold your money — you are trusting them to exist, remain solvent, and honor your loan terms for the rest of your life. Multisig does not eliminate this risk entirely, but it provides a meaningful structural safeguard.

Traditional Private Banks and ETF Collateral

Traditional private banks are beginning to accept Bitcoin ETF shares (IBIT, FBTC) as collateral under standard securities lending frameworks. If your Bitcoin is primarily held in ETF form within a brokerage account, this may be the cleanest structure — familiar legal framework, regulated counterparty, competitive rates tied to SOFR. The trade-off: you don't hold Bitcoin directly, and the ETF introduces its own counterparty and tracking considerations.

Self-Custody vs. Custodial Collateral: The Key Risk Distinction

The single most important decision in structuring a Bitcoin-backed loan is not the interest rate, not the LTV, and not the lender's brand name. It's the custody model for your collateral.

There are three basic models:

Full Custodial Transfer

You send your Bitcoin to the lender. They hold the keys. You trust them completely — to remain solvent, to not rehypothecate your collateral, to process margin calls fairly, and to return your Bitcoin when the loan is repaid. This is the model that BlockFi, Celsius, and Genesis used. All three are now bankrupt or defunct. Their borrowers' collateral was, in many cases, used for purposes entirely unrelated to the loan — including proprietary trading, unsecured lending to third parties, and yield farming on DeFi protocols.

The lesson is brutal and unambiguous: in a full custodial transfer model, your Bitcoin is only as safe as the lender's entire business operation. You are not a secured creditor in any meaningful sense if the lender commingles your collateral with its operating capital.

Multisig Collateral (Unchained Model)

Your Bitcoin sits in a 2-of-3 multisig address. You hold one key, the lender holds one, and an independent third party holds one. No single party can move the Bitcoin unilaterally. Liquidation requires cooperation between two keyholders. This provides transparency (you can verify the Bitcoin is still there on-chain at any time) and protection against unilateral lender action.

This is not risk-free. If both the lender and the keymaster collude or are compromised, the Bitcoin can still be moved. And in a margin call scenario, the lender and keymaster can jointly liquidate over your objection. But the structure prevents the most catastrophic failure mode: a lender silently losing or misusing your collateral.

ETF/Securities-Based Collateral

If your Bitcoin exposure is through a spot ETF held at a traditional brokerage, the collateral sits within the established securities custody framework — SIPC protection (up to limits), regulated custodians, and familiar legal remedies. You don't hold Bitcoin directly, so self-custody is not an option. But the counterparty risk profile is fundamentally different from a crypto-native lender.

The Margin Call Problem: Why LTV Discipline Matters

Bitcoin-backed loans are secured by volatile collateral. If Bitcoin's price drops significantly, the lender will issue a margin call: either deposit additional Bitcoin collateral or reduce the loan balance. If you cannot or do not respond, the lender liquidates your collateral — triggering a taxable capital gains event at exactly the wrong time.

This is the primary risk that makes buy-borrow-die viable in theory but dangerous in practice for undisciplined borrowers.

Bitcoin has dropped 50% or more in a single calendar year multiple times: 2018 (-73%), 2022 (-65%). A borrower at 50% LTV who does not respond to a margin call will be liquidated and will owe capital gains tax on the entire position — the exact outcome the strategy was designed to avoid.

How a Margin Call Cascade Destroys the Strategy

Here's the nightmare scenario in concrete terms. You hold 10 Bitcoin at $100,000 each ($1M position). You borrow $500,000 at 50% LTV. Bitcoin drops 55% to $45,000 per coin. Your collateral is now worth $450,000 — less than your loan balance. The lender liquidates all 10 Bitcoin at $45,000 each. You receive nothing (the loan absorbed all proceeds). And the IRS treats this as a sale: 10 Bitcoin sold at $45,000 each, minus your original cost basis. If your basis was $5,000 per coin, you owe capital gains tax on $400,000 of gains — on Bitcoin you no longer own, at a price that was the cycle low.

This isn't hypothetical. It happened to thousands of borrowers in 2022.

Three rules to manage this risk:

1. Never exceed 40% LTV. A 50% price drop (historically common) at 40% LTV leaves you at 80% LTV — uncomfortable, but you have time to respond. At 50% LTV, a 50% price drop puts you at 100% LTV — you're immediately underwater.
2. Hold reserves. Keep enough liquid assets — cash, short-term Treasuries — to make a margin call without selling Bitcoin. One to two times your annual interest obligation is a reasonable floor.
3. Use LOC structures where available. A revolving line of credit lets you draw and repay flexibly. Keep the drawn balance low during periods of high volatility or market uncertainty. Pay down aggressively when cash flow allows.

Tax Treatment of Loan Proceeds: What the IRS Actually Says

The tax treatment of Bitcoin-backed loan proceeds rests on well-established principles, but the details matter — especially when you're structuring a multi-decade strategy around them.

Loan Proceeds Are Not Income

Under the fundamental principles of IRC §61 and longstanding case law, loan proceeds are not gross income. The borrower receives cash, but takes on a corresponding obligation to repay. There is no accession to wealth, no net enrichment. This is true regardless of the collateral type — real estate, stocks, or Bitcoin.

The IRS has never successfully argued that a bona fide loan with recourse to the borrower constitutes taxable income. As long as the loan is genuine — documented, with stated interest, and with a real repayment obligation — the proceeds are tax-free.

Pledging Collateral Is Not a Disposition

Pledging Bitcoin as collateral is not a "sale or other disposition" under IRC §1001. You retain ownership. The Bitcoin's basis doesn't change. No gain or loss is recognized. This is settled law for traditional securities (pledging stock as collateral for a margin loan is not a taxable event), and the same principles apply to Bitcoin.

Interest Deductibility Under §163(d)

The interest you pay on a Bitcoin-backed loan may be deductible, depending on how you use the proceeds.

Under IRC §163(d), investment interest expense — interest on loans used to fund investments — is deductible against net investment income. If you borrow against Bitcoin and use the proceeds to buy a rental property, invest in a business, or hold other appreciated assets, the interest reduces your taxable investment income dollar-for-dollar (up to the amount of net investment income). Unused investment interest expense carries forward to future tax years.

Interest on personal-use borrowing — buying a car, funding vacations, personal expenses — is not deductible under current law (the personal interest deduction was eliminated by the Tax Reform Act of 1986).

Qualified residence interest (mortgage interest) retains its deduction for the primary and one secondary residence, subject to the $750,000 acquisition debt limit. If you borrow against Bitcoin to purchase a qualified residence, the interest may qualify as mortgage interest — ask your tax advisor to analyze the exact structure.

The deductibility of interest can meaningfully change the economics of buy-borrow-die. At a 37% marginal rate, a deductible 10% interest rate has an after-tax cost of 6.3%. That after-tax cost makes the break-even against selling much more favorable.

Estate Planning Integration: How the Loan Interacts with Your Estate

Buy-borrow-die is not just a tax strategy — it's an estate strategy. The loan's interaction with your estate at death determines whether the strategy delivers its full benefit. Structuring this correctly requires coordination between your tax advisor, estate attorney, and potentially a trust officer. For a full treatment of Bitcoin estate planning structures, see our complete Bitcoin estate planning guide.

The Loan Reduces Your Gross Estate

Outstanding loans at death reduce your gross estate for federal estate tax purposes. If you hold 50 Bitcoin worth $5 million at death, that $5 million is included in your gross estate. But if $2 million of that Bitcoin secures an outstanding loan, the $2 million loan balance is a deductible debt under IRC §2053 — reducing your taxable estate by $2 million.

Net effect: the same Bitcoin generates less estate tax and zero capital gains tax. The loan principal acts as a built-in estate tax deduction.

Estate Liquidity to Repay the Loan

The strategy assumes the estate has sufficient liquidity to repay the loan at death without a fire sale. If 90% of the decedent's wealth is in Bitcoin and the estate owes a multi-million dollar loan, the executor may be forced to sell Bitcoin rapidly — potentially in an unfavorable market — to settle the debt. The step-up protects against capital gains tax, but a forced sale into a down market still destroys value.

Smart structuring ensures the estate has multiple sources of repayment:

• Life insurance proceeds (not subject to income tax) designated specifically for loan repayment
• Liquid assets (cash, bonds, money market) sufficient to cover the loan balance
• A credit facility or bridge loan that gives the estate time to sell Bitcoin at favorable prices
• Income from the decedent's operating businesses or investment portfolio

Using an ILIT to Fund Loan Repayment

One of the most elegant structures pairs buy-borrow-die with an Irrevocable Life Insurance Trust (ILIT). The ILIT owns a life insurance policy on the Bitcoin holder. At death, the insurance proceeds flow to the ILIT — outside the taxable estate — and are used to repay the Bitcoin-backed loan. The Bitcoin receives the step-up. The insurance provides the liquidity. Neither the insurance proceeds nor the Bitcoin sale generates income tax. For a deeper dive on this structure, see our guide on using an ILIT to fund loan repayment.

The insurance premiums are the cost of this structure — paid during life, typically from annual exclusion gifts to the ILIT. For a large Bitcoin position with a significant collateral loan, the insurance premiums are a fraction of the capital gains tax that would otherwise be owed.

Trust as Borrower

In some structures, a revocable living trust — rather than the individual — holds the Bitcoin and serves as the borrower. This can simplify administration at death (the trust doesn't go through probate), ensure continuity of the lending relationship (the trust survives the individual's death), and provide clear authority for the successor trustee to manage the loan and collateral.

The tax treatment is unchanged: a revocable trust is a "grantor trust" for income tax purposes, meaning all income and deductions flow through to the individual grantor. The step-up at death applies to assets held in a revocable trust just as it applies to individually held assets.

Using Borrowed Proceeds to Fund Irrevocable Trusts

One advanced application: borrow against Bitcoin, use the cash to fund an irrevocable trust (Spousal Lifetime Access Trust, dynasty trust, ILIT, or Charitable Remainder Trust), and remove the proceeds from your taxable estate — while keeping the Bitcoin in your name for the eventual step-up.

The structure works as follows:

1. Borrow $2M against $5M Bitcoin position (40% LTV)
2. Gift $2M cash to an irrevocable dynasty trust (uses $2M of your lifetime exemption)
3. Trust invests the $2M and grows tax-free in a dynasty structure
4. Bitcoin stays in your estate, appreciating toward a full step-up at death
5. At death: step-up eliminates capital gain on Bitcoin; heirs retire the loan from stepped-up proceeds

Net result: you moved $2M out of your estate using borrowed funds (no additional liquidity required), retained full Bitcoin exposure for the step-up, and funded a multi-generational trust. The interest on the loan is the cost of that estate freeze — often far cheaper than the alternative of gifting Bitcoin directly and losing the step-up on the gifted portion.

This structure pairs particularly well with a SLAT when a spouse retains access to trust distributions — giving the family both the estate tax freeze and ongoing access to the gifted capital.

The OBBBA $15M Exemption Overlay: Stacking Buy-Borrow-Die with the Increased Exemption

The One Big Beautiful Bill Act (OBBBA), signed in 2025, increased the federal estate and gift tax exemption to approximately $15 million per individual ($30 million per married couple). This creates a powerful layering opportunity with buy-borrow-die that most advisors are only beginning to appreciate.

The Strategic Overlay

The $15 million exemption and buy-borrow-die serve different functions. The exemption shields a fixed dollar amount from estate tax. Buy-borrow-die eliminates capital gains tax on appreciated assets. Used together, they cover complementary risks:

• Use the exemption for non-Bitcoin assets. Gift real estate, business interests, or other appreciated assets to irrevocable trusts using the $15M exemption. These gifts use exemption but also remove future appreciation from your estate. The step-up is sacrificed on gifted assets, but the exemption makes the estate tax cost zero.
• Use buy-borrow-die for Bitcoin. Keep Bitcoin in your estate. The step-up at death eliminates capital gains. The outstanding loan reduces the estate value for estate tax purposes. Any remaining Bitcoin above the exemption is taxed at estate tax rates — but the capital gains tax (which could be 30%+ of the position) is gone entirely.

This is a division-of-labor approach. The exemption is a finite resource — $15M per person. Don't waste it on assets that would receive a clean step-up at death anyway. Use it on assets where you need to remove future appreciation from the estate. Let buy-borrow-die handle the capital gains problem on Bitcoin, and let the exemption handle the estate tax problem on everything else.

For Estates Between $15M and $30M (Married Couples)

A married couple with $25 million in total assets — $15 million in Bitcoin and $10 million in other assets — can deploy both tools simultaneously. Gift the $10 million in non-Bitcoin assets to dynasty trusts or SLATs using the combined $30 million exemption (only $10M of $30M used). Keep all $15 million of Bitcoin in the estate for the step-up. Borrow against the Bitcoin for liquidity as needed. At death, the step-up eliminates capital gains on $15 million of Bitcoin, the loan reduces the gross estate, and the remaining estate is well within the exemption. Total estate tax: zero. Total capital gains tax: zero.

For Estates Significantly Above $30M

For very large Bitcoin estates, buy-borrow-die alone won't eliminate estate tax — but it still eliminates capital gains tax, and the loan still reduces the gross estate. At these levels, combining buy-borrow-die with GRATs, CLATs, dynasty trusts, and ILIT-funded insurance creates a comprehensive structure that minimizes both estate tax and income tax across the full portfolio.

Failure Scenarios: When Buy, Borrow, Die Goes Wrong

Intellectual honesty requires laying out the failure modes. This strategy can destroy value under specific conditions — and those conditions are not exotic or unlikely.

Lender Insolvency

The cautionary tale of 2022 cannot be overstated. BlockFi, Celsius, and Genesis — three of the largest Bitcoin lending platforms — all failed within months of each other. Borrowers who had pledged Bitcoin as collateral found themselves as unsecured creditors in bankruptcy proceedings. The Bitcoin was gone. Recovery rates ranged from pennies on the dollar to zero.

The root cause in each case was the same: the lenders were not operating as simple collateral lenders. They were rehypothecating customer deposits, making unsecured loans to entities like Three Arrows Capital, and engaging in speculative trading. When the market turned, they couldn't return the collateral because it no longer existed in the form it was deposited.

For a buy-borrow-die strategy intended to last decades, lender selection is existential. Questions to ask:

• Does the lender publish proof of reserves, and are they audited by a reputable third party?
• Is the collateral held in segregated wallets, or commingled with the lender's operating funds?
• Does the lender rehypothecate collateral (lend it to third parties)?
• What jurisdiction is the lender domiciled in, and what legal protections exist for collateral in bankruptcy?
• Does the custody model (multisig vs. full transfer) provide any structural protection?

Margin Call Cascade

A severe Bitcoin bear market — 60%+ drawdown sustained for months — can cascade through a leveraged position. The initial margin call requires cash or additional collateral. If the borrower's liquid reserves are exhausted and Bitcoin continues to fall, subsequent margin calls create a doom loop: the borrower must sell other assets (potentially at depressed prices) or face liquidation. Forced liquidation triggers capital gains tax on the Bitcoin sold, creates a realized loss on the remaining position's value, and eliminates the step-up benefit on the liquidated portion.

In the worst case, the borrower loses the Bitcoin, owes capital gains tax on the liquidation, and still owes a deficiency on the loan if the collateral didn't cover the balance. This is the exact opposite of the intended outcome.

Interest Rate Environment Changes

Buy-borrow-die was designed during an era of low interest rates. When Bitcoin-backed loans cost 4–6% (2020–2021), the math was overwhelmingly favorable. At 10–14% (2023–2026 range), the break-even period is shorter and the strategy becomes more sensitive to assumptions about Bitcoin appreciation, tax rates, and loan duration.

If interest rates remain elevated for a sustained period, the cumulative interest cost can exceed the capital gains tax that would have been owed on a sale. The strategy doesn't "fail" in the structural sense — the step-up still works — but the economic benefit shrinks or reverses.

Legislative Change

The Biden administration's 2021 and 2022 budget proposals included a provision to require capital gains recognition on loans against appreciated assets above a certain threshold. The proposal never passed. Similar provisions have appeared in various reform drafts over the past two decades. None have become law.

The step-up in basis itself — the mechanism that makes buy-borrow-die work — has been a legislative target for decades. Proposals to replace it with "carry-over basis" (inherited assets retain the decedent's original basis) would eliminate the strategy entirely. As of 2026, the step-up survives and was preserved under the OBBBA.

This is a known legislative risk. The strategy's viability depends on the continuation of §1014. For that reason, advisors typically recommend not making buy-borrow-die the sole pillar of a wealth transfer plan — combine it with trusts, GRATs, and other structures that work independently of the step-up.

Strategy Comparison: Sell vs. Borrow vs. GRAT

Bitcoin Mining Companies: An Additional Layer

For Bitcoin mining operators, buy-borrow-die interacts with the business structure in ways worth understanding.

Mining companies typically hold Bitcoin on their balance sheet as treasury. If that Bitcoin is held at the corporate level, it does not receive a step-up at the individual shareholder's death — the corporation is a separate taxpayer, and the step-up applies only to assets held directly by the decedent. The shareholder's stock receives the step-up, but any gain embedded at the corporate level remains.

Pass-through structures (LLCs taxed as partnerships, S-corps) handle this differently: a partner's or S-corp shareholder's basis adjusts at death via §1014, and the partnership's inside basis can be stepped up via a §754 election. Mining operators holding Bitcoin through entities should work with advisors to ensure the step-up applies at the level where it matters.

For individual miners and mining investors holding direct Bitcoin positions, the full step-up applies — and buy-borrow-die works exactly as described above.

The Complete Tax-Optimized Bitcoin Wealth Stack

Buy-borrow-die works best as one component of a layered strategy — not a standalone play. A complete Bitcoin wealth preservation architecture might look like:

1. Accumulation layer: Direct Bitcoin in personal names or revocable trust. Captures the full step-up. Maximum flexibility.
2. Liquidity layer: Bitcoin-backed LOC at 30–40% LTV. Draw as needed. Repay from operating income when possible. Reserve funds to handle margin calls.
3. Estate freeze layer: Dynasty trust or SLAT funded with loan proceeds or annual gifts. Removes appreciating assets from taxable estate while retaining some access.
4. Charitable layer: CRT or private foundation for holders with philanthropic goals. Eliminates capital gains on donated Bitcoin, funds charity, provides income stream.
5. Tax shelter layer: Mining investment for depreciation deductions that offset Bitcoin income. The most underutilized tool in the Bitcoin tax stack.

Each layer serves a different function. Buy-borrow-die handles liquidity without triggering gains. The dynasty trust handles multi-generational transfer. Mining handles current-year tax obligations. The step-up handles everything that remains at death.

7-Step Action Plan

1. Calculate your break-even. Estimate avoided capital gains tax rate (federal + state) on your Bitcoin position. Divide by your expected loan interest rate. The result is the number of years at which borrowing becomes more expensive than selling. If that's > your expected holding period, selling may be smarter.
2. Choose your custodian carefully. Unchained's multisig structure is the most Bitcoin-native and preserves partial custody. Traditional private banks offer lower rates if you qualify. Evaluate counterparty risk above all — 2022 proved that crypto lenders can fail quickly.
3. Set LTV at 40% maximum. Request a loan equal to 40% of current Bitcoin value. Leave buffer for a 50% Bitcoin price decline without triggering a margin call.
4. Maintain a margin call reserve. Hold 12–24 months of interest payments in cash or short-term Treasuries. This is your insurance against having to respond to a margin call with a rushed Bitcoin sale.
5. Document the use of proceeds. If using loan proceeds for investment purposes, document the use carefully to support an investment interest deduction under §163(d).
6. Review estate documents. Ensure your Bitcoin is either titled in your personal name or in a revocable trust that qualifies for the step-up under §1014. Irrevocably transferred Bitcoin does not receive the step-up at your death — only property in your gross estate does.
7. Model the combined strategy. Work with a tax advisor to model buy-borrow-die alongside mining deductions, trust structures, and estate tax planning to quantify the full benefit — not just the isolated capital gains savings.

What Buy-Borrow-Die Cannot Do

A few limits worth stating clearly:

• It does not eliminate estate tax. Bitcoin in your estate at death is still included in your gross estate for estate tax purposes. The outstanding loan reduces that estate dollar-for-dollar — but the remaining Bitcoin still counts. A $30M Bitcoin position with a $5M loan leaves $25M in gross estate.
• It does not work for irrevocably transferred Bitcoin. Bitcoin you've already gifted to a dynasty trust or other irrevocable vehicle is not in your estate — no step-up at your death. The strategy only applies to Bitcoin you hold until death.
• It does not work if you sell under pressure. A forced sale to cover a margin call, a divorce settlement, a business failure, or any other compelled disposition triggers capital gains tax. The step-up only works if you die holding the asset.
• It may not survive legislative change. The step-up in basis is the foundational mechanism. If Congress eliminates or modifies it, the strategy's value changes accordingly.

Frequently Asked Questions

The Bottom Line

Buy, borrow, die is not a loophole. It is the predictable result of two foundational tax principles — debt is not income, and inherited assets receive a new basis — interacting in a way that Congress has been aware of for decades and has declined to close.

For Bitcoin holders, it is one of the most powerful tools available. Not because it eliminates all taxes — it does not. But because it separates the timing of capital realization from the timing of capital gains recognition, indefinitely. Held long enough, borrowed against conservatively, and combined with proper estate planning, buy-borrow-die can permanently eliminate the capital gains obligation on decades of Bitcoin appreciation.

The cost is real: interest rates, counterparty risk, LTV discipline, and the possibility of legislative change. Model it honestly against selling. For most Bitcoin-wealthy families with combined state/federal rates above 30%, the strategy wins in under three years of loan term.

Work with advisors who have executed this before. The structure is well-established — the execution details matter.

This content is educational and does not constitute legal or tax advice. The Bitcoin Family Office works with families navigating Bitcoin wealth planning at the institutional level. Learn more about our services.