Borrowing Against Crypto Instead Of Selling: The Real Cost

What You Are Actually Doing When You Borrow Against Crypto

The pitch sounds elegant: pledge your Bitcoin or Ethereum as collateral, receive stablecoins or fiat, spend the proceeds, and avoid the capital gains tax you would owe if you sold. The loan is not a taxable event because you have not disposed of the asset. You retain upside exposure, you access liquidity, and the tax bill stays deferred until you eventually sell.

The mechanism is real. Borrowing against crypto does not trigger a capital gains tax event. For a holder with significant unrealized gains, the tax savings from borrowing versus selling can be substantial, often exceeding the total interest cost of the loan. If you bought Bitcoin at $20,000 and it now trades at $100,000, selling $50,000 worth realizes $40,000 in gains. At a 20% long-term capital gains rate, you owe $8,000 immediately. Borrowing $50,000 against that Bitcoin at 50% loan-to-value defers that $8,000 tax bill indefinitely, at the cost of whatever interest the lender charges.

What the pitch does not emphasize is that you have replaced a one-time tax liability with continuous liquidation risk. The collateral you pledged must maintain sufficient value to cover the debt. If the ratio between debt and collateral crosses the platform's liquidation threshold, the lender seizes and sells your collateral automatically. That liquidation is a taxable event even though you did not choose to sell. You lose the collateral, you owe the tax, and you still owe any remaining debt if the sale did not cover it.

The question worth answering is what loan-to-value ratio is survivable, how liquidation actually happens, and what a realistic price drop does to a position that looked comfortable when you opened it. The documentation provides the thresholds. The on-chain data shows how quickly those thresholds are crossed when volatility arrives.

How Loan-to-Value and Liquidation Thresholds Actually Work

Loan-to-value is the ratio of the loan amount to the value of the collateral. If you pledge $100,000 in Bitcoin and borrow $50,000 in stablecoins, your LTV is 50%. That number moves continuously as the market price of your collateral changes. If Bitcoin drops 20%, your collateral is now worth $80,000 and your LTV has risen to 62.5%, even though the debt amount has not changed.

The liquidation threshold is the LTV at which the platform automatically liquidates your position. This threshold is always higher than the maximum LTV you are allowed to borrow at, but the gap is often narrow. On Aave V3 as of mid-2026, ETH has an 80.5% max LTV with an 83% liquidation threshold. That leaves a 2.5 percentage point buffer. WBTC carries a 73% max LTV and 78% liquidation threshold, a five-point buffer. The narrower the gap, the less room you have when prices move.

Liquidation price equals opening price times starting LTV divided by liquidation threshold. If you borrow at 50% LTV on $100,000 Bitcoin collateral and the liquidation threshold is 80%, your liquidation price is $100,000 multiplied by 0.50 divided by 0.80, which equals $62,500. That is a 37.5% drop before liquidation. If you borrow at 70% LTV with the same 80% threshold, liquidation occurs at $87,500, a drop of only 12.5%. The higher your starting LTV, the less volatility you can survive.

Real-world data from September 8, 2026 illustrates how little room exists at high LTV. A position opened on October 7, 2025 at Bitcoin's one-year high of $124,740 had reached 79.2% LTV by September 2026. The liquidation threshold would be reached at $77,962, which was 0.99% below the level Bitcoin traded at that afternoon. A single weak trading day would trigger forced liquidation. This is documented evidence that a position that looks safe at 80% LTV is one weak trading day away from liquidation.

What a 40% Drawdown Does to a 50% LTV Position

A position that appears comfortable at 50% LTV becomes significantly less comfortable after a market drawdown, not because the LTV itself has changed dramatically, but because the buffer to liquidation has shrunk and your ability to add collateral or repay debt may be constrained by the same market conditions that caused the drop.

Start with $100,000 in Bitcoin collateral and a $50,000 loan at 50% LTV. Your liquidation threshold is 80%, so liquidation occurs if your collateral falls to $62,500, a 37.5% drop. Bitcoin then falls 40%, to $60,000. Your new LTV is $50,000 divided by $60,000, which equals 83.3%. You are past the liquidation threshold. The platform liquidates immediately.

During liquidation, the liquidator repays debt on behalf of the borrower and receives an equivalent value plus a liquidation bonus from the borrower's collateral. That bonus typically runs 5-10% depending on the asset. On Aave V3, ETH carries roughly a 5% liquidation penalty; on Compound V3, liquidation penalties range from 5-10%. If your position is liquidated with a 5% penalty, the liquidator claims $52,500 in collateral to repay your $50,000 debt. You are left with $7,500 in remaining collateral, and you owe capital gains tax on the $52,500 that was sold at its current market value.

If Bitcoin drops 30% instead of 40%, your collateral is worth $70,000 and your LTV is 71.4%. You are still below the 80% liquidation threshold, but you have only 8.6 percentage points of buffer remaining. If your borrow rate is 3.5% APY and you do nothing, the debt grows by approximately $1,750 over the next year, raising your effective LTV by 2.5 percentage points even if the price does not move further. Your buffer has shrunk to six points. A second 10% drop eliminates it entirely.

The error most borrowers make is assuming that a 50% LTV provides 30 percentage points of safety because the liquidation threshold is 80%. It does not. It provides a 37.5% price drop before liquidation if the debt is static, and a smaller drop if interest is accruing. When the price has already fallen 30%, the remaining buffer is psychological, not mathematical.

Interest Accrual and the Passive Drift Toward Liquidation

A position can cross the liquidation line passively over weeks even if the collateral price does not move, because the debt side is growing. A common error is ignoring borrow interest accrual. Your debt grows continuously as interest compounds, so a position that looks safe today can drift toward liquidation over weeks even if prices never move.

Aave V3 variable stablecoin borrow rates as of mid-2026 run 3-4.3% APY. Compound V3 charges around 2.7-3.4% APY for variable stablecoin borrow rates. Those rates are variable and can spike during high utilization. If utilization on a lending pool rises sharply because other borrowers are drawing down liquidity, your borrow rate can double or triple within days. Variable borrow rates can spike when utilization rises, accelerating the drift.

If you borrow $50,000 at 50% LTV against $100,000 in collateral and your borrow rate is 4% APY, your debt grows by $2,000 over the course of a year. If your collateral value remains exactly $100,000, your LTV rises from 50% to 52% without any market movement. If your collateral falls 10% to $90,000 during that year, your LTV rises to 57.8%. The combined effect of price decline and interest accrual moves you closer to liquidation faster than either factor alone.

The platforms that offer the lowest advertised rates are not always the safest. Nexo's Platinum tier advertises rates starting at 1.9%, but achieving that tier requires holding 10% of your portfolio in NEXO tokens. If the value of those tokens declines, your effective cost rises. Nexo relaunched in the United States in February 2026, though it received a $500,000 fine from California's DFPI for licensing violations. When evaluating platforms, the rate is only one component of the risk. Custody, jurisdiction, and liquidation mechanics matter as much.

How Liquidation Actually Happens on DeFi and CeFi Platforms

When your LTV crosses the threshold, the protocol liquidates immediately and often takes more collateral than the minimum required. The mechanism differs between decentralized and centralized platforms, and the difference determines how much warning you receive and how much control you retain.

On DeFi lending protocols like Aave and Compound, liquidation is automated and permissionless. When your position crosses the liquidation threshold, any third-party liquidator can repay part or all of your debt and claim your collateral plus a liquidation bonus. The liquidator is not the protocol; it is an independent actor monitoring positions for profit opportunities. Liquidation occurs in the same block as the price movement that triggered it. There is no margin call, no grace period, no phone call.

Aave V3 as of mid-2026 has $18.995 billion in total value locked and ranks first by TVL among lending protocols. Its TVL has increased 14.3% over the past 30 days. ETH on Aave V3 has an 80.5% max LTV with an 83% liquidation threshold and roughly a 5% liquidation penalty. WBTC carries a 73% max LTV and 78% liquidation threshold. When liquidation occurs, the protocol does not sell your collateral on the open market. The liquidator receives it directly in exchange for repaying your debt, and the liquidator then sells it wherever they choose. You have no control over timing, price, or venue.

CeFi platforms offer different mechanisms, though not necessarily safer ones. Ledn triggers automatic liquidation at 80% LTV. Nexo uses partial automatic repayment at approximately 83.33% LTV, selling just enough collateral to restore the ratio. Unchained provides margin calls before liquidation, giving borrowers time to add collateral or make a payment. That margin call is a manual process, which means it depends on Unchained's operational capacity during volatile periods. If the price gaps quickly or the platform is overwhelmed, the margin call may arrive too late to act on.

Custody risk is real: if a lender fails, your collateral could be frozen in bankruptcy proceedings. This is distinct from liquidation risk but equally important. DeFi protocols hold collateral in smart contracts, which means the protocol cannot abscond with it, but the smart contract may contain bugs or be subject to governance attacks. CeFi platforms hold collateral in company wallets, which means your collateral is an unsecured claim if the company becomes insolvent. The collapses of Celsius, Voyager, and BlockFi in 2022 demonstrated that CeFi custody risk is not theoretical.

Cascading Liquidations and Systemic Risk

Cascading liquidations are a systemic risk in DeFi: when a sharp price drop triggers mass liquidations, the resulting sell pressure can push prices lower, triggering more liquidations. This feedback loop contributed to multiple DeFi crises, including the March 2020 "Black Thursday" event on MakerDAO. On that day, Ethereum dropped 30% in a few hours. Liquidators could not process liquidations fast enough because gas fees spiked and network congestion delayed transactions. MakerDAO accrued $4 million in bad debt because collateral was sold for less than the outstanding loans.

The mechanics are straightforward. A 20% price drop liquidates all positions with LTV above 80% (assuming an 80% threshold). Those liquidations dump collateral onto the market, pushing the price down another 5%. That triggers liquidations of positions with LTV above 75%. The cycle continues until either the price stabilizes, new buyers step in, or the lending pools exhaust their liquidity.

The risk is highest during periods of low liquidity, which is precisely when borrowers are most likely to need liquidity themselves. If you are monitoring your position during a cascade and decide to add collateral, you may find that the transaction does not confirm in time. If you decide to repay part of the debt, you may find that stablecoin liquidity has dried up or that the repayment transaction is stuck in a mempool backlog. The platform does not care. Liquidation is automatic.

Tax Treatment: When Borrowing Becomes a Sale

Pledging Bitcoin as collateral for a loan is not a sale, so it typically does not realize a capital gain when the loan originates. This is the primary reason long-term holders borrow rather than sell. The tax savings are immediate and measurable. If you have $100,000 in unrealized gains and you sell, you owe $20,000 in federal long-term capital gains tax immediately (at a 20% rate). If you borrow instead, you owe nothing until the position is closed.

Partial or full liquidation counts as a property disposition. When the lender sells your collateral, you are required to report it as a sale and pay taxes on any profits the asset had generated from the time of purchase. You will likely owe capital gains tax on the portion of the collateral that was sold at its current market value. This is the detail that most explainers omit. Liquidation is not a tax-neutral event. It is a forced sale that occurs at the worst possible time, when the asset price is already down and you may have no remaining collateral to pay the tax bill.

If you bought Bitcoin at $30,000 and it is liquidated at $60,000, you owe tax on a $30,000 gain per coin, even though you did not choose the timing of the sale and even though the price may have been $100,000 two weeks earlier. The tax is calculated based on the price at liquidation, not the price at the peak. If you no longer hold any Bitcoin because it was all liquidated, you must pay the tax out of other funds. Maintaining a safe LTV ratio is not just a financial strategy, but a tax strategy as well.

Some borrowers attempt to use the loan proceeds to pay the tax on a previous sale, creating a circular structure that defers tax indefinitely. This works until it does not. If the collateral is liquidated and the sale proceeds are less than the outstanding loan, you owe the difference to the lender and you still owe tax on the sale. The IRS does not care that the sale was involuntary.

DeFi vs. CeFi: Rates, Custody, and Jurisdiction

DeFi variable rates as of mid-2026 run 2.7-4.3% APY for stablecoin borrows on Aave and Compound. CeFi fixed rates start higher, at 9% or more for Ledn and 14% or more for Unchained. The rate difference reflects the custody model and the jurisdiction. DeFi protocols are non-custodial and permissionless. You retain control of your collateral until liquidation. CeFi platforms are custodial and regulated, which means they face compliance costs and capital requirements that DeFi protocols do not.

Morpho as of June 2025 supports over 70 assets, with some offering LTVs up to 86% before liquidation is triggered. Morpho offers competitive borrowing rates and no processing fees. Compound V3 as of mid-2026 has approximately $1.8 billion in TVL. ETH collateral in the USDC market carries roughly an 83% borrow collateral factor and 90% liquidation collateral factor. The higher liquidation threshold provides more buffer, but it also reflects higher perceived risk in the collateral asset.

CeFi platforms differ in how they handle distressed positions. Unchained provides margin calls before liquidation. Nexo partially liquidates to restore the ratio. Ledn liquidates entirely at 80% LTV. The documentation is not always clear about what happens during extreme volatility or operational disruption. When Celsius halted withdrawals in June 2022, borrowers could not add collateral or repay loans, even though their positions were drifting toward liquidation as interest accrued. The loans kept compounding. The collateral stayed frozen. The positions eventually liquidated, and the proceeds went to the bankruptcy estate.

Jurisdiction matters. Nexo relaunched in the United States after settling with regulators, but it operates under different rules in different states. If you are a U.S. person borrowing from a non-U.S. platform, the tax treatment is the same, but your legal recourse if something goes wrong is limited. If you are borrowing on a DeFi protocol, there is no counterparty to sue. The smart contract is the agreement. If the contract behaves as written, you have no claim, even if the outcome is liquidation.

What To Do Next

If you are considering borrowing against crypto, the first decision is what LTV you can survive. A 50% LTV provides a 37.5% drawdown buffer if your liquidation threshold is 80%. A 70% LTV provides a 12.5% buffer. The question is not what the market might do in the best case. The question is what it has done in the worst case, and whether you can add collateral or repay debt fast enough if it does it again.

Monitor your position daily, but do not rely on monitoring alone. Set alerts at 60% LTV and 70% LTV if you started at 50%. If an alert triggers, decide in advance whether you will add collateral or repay part of the debt. If you wait until you are at 78% LTV to decide, you are deciding under duress and you may not have access to the stablecoins or fiat you need.

Understand the liquidation mechanics of the platform you are using. Read the documentation. Check whether liquidation is automatic or whether you receive a margin call. Check how long you have to respond. Check what happens if you cannot respond because the network is congested or the platform is offline. Check whether partial liquidation is possible or whether the platform liquidates the entire position. Those details are disclosed, but they are not always prominent.

Calculate the tax consequence of liquidation before you open the position. If you borrowed $50,000 against $100,000 in Bitcoin that you bought at $30,000, and the position is liquidated at $60,000, you owe tax on $30,000 in gains per coin. If the liquidation involves 0.833 Bitcoin, you owe tax on $25,000 in gains. At a 20% rate, that is $5,000. If you do not have $5,000 in other funds, you have a problem. The tax bill does not go away because the liquidation was forced.

Compare rates and custody models, but do not optimize for the lowest rate if it comes with higher custody risk or a worse liquidation process. A 2% rate on a DeFi protocol with instant automated liquidation may be worse than a 9% rate on a CeFi platform that gives you 24 hours' notice. The difference is $3,500 per year on a $50,000 loan. The cost of a badly-timed liquidation is the entire position.

The Takeaway

Borrowing against crypto instead of selling defers the tax event and retains upside exposure, but it replaces a one-time tax liability with continuous liquidation risk that accelerates as interest accrues. The LTV that provides a 37.5% buffer at inception provides a 10% buffer after the collateral has already dropped 30%, and the debt has grown by a year's worth of compounding interest. A position that looked comfortable at 50% LTV is uncomfortable at 71%, and it becomes uncomfortable faster than most borrowers expect because the debt grows while the collateral does not.

The platforms disclose the thresholds. The documentation states the liquidation bonuses. The on-chain data shows how many positions were liquidated during past drawdowns and how quickly the liquidations occurred. What the pitch does not state clearly is that liquidation is a taxable event even though you did not choose it, and that the tax is owed on gains measured at liquidation, not at the peak. The capital gains bill you deferred by borrowing comes due at the moment you have the least ability to pay it.

Frequently Asked Questions

Is borrowing against crypto taxable?

No. Pledging cryptocurrency as collateral for a loan is not a sale, so it does not trigger a capital gains tax event when the loan originates. The tax savings from borrowing versus selling can exceed the total interest cost of the loan, especially for holders with significant unrealized gains. However, if your collateral is liquidated, that liquidation counts as a property disposition and you will owe capital gains tax on the portion sold.

What loan-to-value ratio is safe for crypto loans?

Most platforms allow up to 50% LTV, and some offer 80%. A 50% LTV provides meaningful buffer, but safety depends on your liquidation threshold and asset volatility. If your liquidation threshold is 80% and you borrow at 50% LTV, a 37.5% price drop triggers liquidation. The gap narrows as interest accrues. Positions above 70% LTV leave almost no margin for error during volatile market conditions.

How does liquidation actually happen?

When your LTV crosses the liquidation threshold, the protocol liquidates immediately, often taking more collateral than the minimum required. A liquidator repays your debt and receives an equivalent value plus a liquidation bonus of 5-10% from your collateral. You lose the collateral and still owe capital gains tax on the sale. Platforms differ: Ledn triggers automatic liquidation at 80% LTV, while Nexo uses partial automatic repayment at approximately 83.33% LTV.

Can I avoid liquidation by monitoring my position daily?

Monitoring helps but does not eliminate risk. A common error is ignoring borrow interest accrual. Your debt grows continuously as interest compounds, so a position that looks safe today can drift toward liquidation over weeks even if prices never move. Variable borrow rates can spike when utilization rises, accelerating the drift. During extreme volatility, prices can gap through your liquidation threshold faster than you can add collateral.

What is the difference between DeFi and CeFi crypto loans?

DeFi protocols like Aave and Compound offer variable stablecoin borrow rates of 3-4.3% APY with automated liquidation at fixed LTV thresholds. CeFi platforms charge higher fixed rates starting at 9% or more but may offer margin calls before liquidation. Custody risk differs: DeFi holds collateral in smart contracts; CeFi platforms hold it in company wallets, meaning your collateral could be frozen in bankruptcy proceedings if the lender fails.