How crypto-backed loans work (and the liquidation risk)

A crypto-backed loan lets you borrow cash or stablecoins against your crypto without selling it. You hand over crypto as collateral, borrow up to a set percentage of its value (the loan-to-value, or LTV), pay interest while the loan is open, and get your collateral back once you repay. The reason this product exists, and the reason it cuts both ways, is the one thing every guide buries near the bottom: if your collateral falls in price past a set threshold, the lender can sell it out from under you to cover the loan. That forced sale is called liquidation, it is often automatic, and it tends to fire during exactly the kind of crash that pushed your collateral down in the first place.

The idea has reached mainstream lending. Coinbase and the mortgage lender Better have offered a Bitcoin-backed mortgage, where a borrower pledges Bitcoin as collateral toward a home loan instead of selling it for the down payment. That is the same mechanism this guide explains, applied to a house. Once a major exchange and a real mortgage lender wrap this around property, it is worth understanding the machinery before you sign anything.

What is a crypto-backed loan?

A crypto-backed loan is a secured loan where crypto is the security. You deposit crypto as collateral with a lender or a protocol, and in return you receive a loan, usually in stablecoins or fiat currency. You keep ownership of the collateral in the accounting sense; it is yours to reclaim once the debt is cleared. What you give up is control of it while the loan is open, and the right to keep it if the loan goes wrong.

It works the same way a pawnshop or a home equity line works. The lender holds something valuable of yours, lends you a portion of its worth, and keeps the right to sell the asset if you do not pay. The difference is that your collateral here can lose a third of its value in a weekend, which changes everything about how these loans are priced and how fast they can go bad.

People reach for these loans for a specific reason: they want cash or stablecoins but do not want to sell. Maybe they think the asset will go up and they do not want to miss it. Maybe selling would trigger a tax bill they would rather defer. Maybe they just need liquidity for a few months and expect to repay. The loan lets them spend the value of their crypto without parting with the crypto itself.

How does a crypto-backed loan work?

The flow is roughly the same whether you use a custodial company or a DeFi protocol. Here is the order of operations.

1. Pick a lender or protocol and the loan terms. You choose what crypto to post (Bitcoin and Ether are the most widely accepted), the asset you want to borrow (often a stablecoin like USDC, sometimes fiat), and the LTV you are comfortable with. The platform shows you the maximum LTV it allows and the interest rate that applies.

2. Deposit your collateral. You send the crypto to the lender's custody address or lock it in the protocol's smart contract. This is the irreversible step: once your collateral is in, the loan's rules govern it, including the lender's right to sell it if the price drops. Read the liquidation terms before you deposit, not after.

3. Receive the loan. The platform releases the borrowed funds, stablecoins or fiat, up to your chosen LTV. If you post $10,000 of Bitcoin at a 50% LTV, you receive around $5,000. You now have the cash and the lender holds the Bitcoin.

4. Pay interest while the loan is open. Interest accrues for as long as you hold the loan. Some platforms bill it monthly; some let it compound against the loan balance; some quote a fixed term, others an open-ended line you repay whenever. Watch whether the rate is fixed or variable, because a variable rate can climb while your loan is open.

5. Manage your LTV. This is the active part. If your collateral's price falls, its dollar value drops, your LTV rises toward the liquidation line, and you are closer to a forced sale. You can defend the position by adding more collateral or repaying part of the loan to push the LTV back down. Many platforms send a margin call, a warning that you are near the line, but do not count on it arriving in time during a fast crash.

6. Repay and reclaim. When you repay the principal plus accrued interest, the lender releases your collateral back to you. With a DeFi protocol, repaying the debt unlocks the smart contract and you withdraw the collateral yourself.

The whole arrangement lives or dies on step 5. A loan you take at a conservative LTV and watch carefully is a manageable tool. A loan you max out and forget is a liquidation waiting for the next red candle.

What is loan-to-value, and why does it matter?

Loan-to-value is the size of your loan divided by the value of your collateral, written as a percentage. Post $10,000 of crypto and borrow $5,000 and your LTV is 50%. Borrow $7,000 against the same collateral and your LTV is 70%. The number tells you, at a glance, how much room your collateral has to fall before the lender steps in.

LTV matters because crypto prices move hard and fast, and your LTV moves with them in the wrong direction. Say you start at a 50% LTV: $5,000 borrowed against $10,000 of Bitcoin. If Bitcoin drops 20%, your collateral is now worth $8,000, but you still owe $5,000, so your LTV has jumped to about 63%. Another leg down and you are pressing against the liquidation threshold. You did nothing, the market did, and your loan got riskier on its own.

A safe buffer comes from borrowing well below the maximum LTV the platform offers. If a lender allows up to a 60% or 70% LTV and liquidates somewhere above that, starting at a 70% LTV gives your collateral almost no room to drop before trouble. Starting at a 25% to 35% LTV gives the position space to ride out an ordinary 30% or 40% drawdown, the kind of move crypto delivers on a regular basis, without tripping the line. The lower your starting LTV, the more market pain you can absorb before anyone force-sells your coins. That cushion is the single most useful thing you control on one of these loans.

What happens if my collateral drops? (liquidation)

Liquidation is the lender selling your collateral to repay the loan, triggered when your LTV crosses a set threshold. It is the core risk of the entire product, and it works against you in the moments you can least afford it.

Here is the mechanic. Every loan has a liquidation LTV, the line above which the lender acts. As your collateral's price falls, your LTV climbs toward that line. Many platforms first issue a margin call: a notice that you are close, with a window to add collateral or repay part of the loan to bring the LTV back down. If you do not respond, or the price falls too fast for any response to matter, the platform sells enough of your collateral to bring the loan back into a safe ratio. On a custodial platform this happens on the company's terms. On a DeFi protocol it is automatic, executed by the smart contract and often by third parties who get paid a bonus for triggering it.

Run the worked example forward. You borrowed $5,000 against $10,000 of Bitcoin at a 50% LTV. Bitcoin slides, your collateral's value falls toward $7,000, and your LTV climbs past the platform's liquidation line. The lender sells your Bitcoin to recover the $5,000 it is owed, plus interest and often a liquidation fee. You are left with whatever scraps remain after the debt and fees are covered, and you took that loss at a low price, because liquidations cluster at exactly the moment the market is dumping. The forced sale can even add to the selling pressure that drove the price down.

Two details people miss. First, liquidation is usually not a polite, partial trim that leaves you whole; once it fires, fees and slippage eat into what you get back, and a fast enough crash can liquidate the whole position. Second, you do not get to time it. The threshold does not care that you were about to add collateral or that the dip looked like it would bounce. The lower your LTV and the more spare collateral you keep ready to add, the further you push that line away from today's price.

Where does my collateral actually sit?

This is the question that separates the people who understand these loans from the people who just clicked "borrow." When you post collateral, you hand control of it to someone or something. Who, and under what rules, defines a whole category of risk that has nothing to do with the price of your crypto.

There are two custody models.

CeFi: a custodial company holds your collateral. With a centralized lender, a company takes your crypto into its own custody and lends against it. You trust that company to hold the collateral safely, to apply the liquidation rules fairly, and to give it back when you repay. The danger is that some custodial lenders do not just hold your collateral; they re-lend it. This is called rehypothecation, using your posted asset for their own lending, trading, or yield. If those bets go bad, your collateral can be caught in the failure. The collapses of several crypto lenders in 2022 followed this pattern: customer assets that turned out to be lent out, leveraged, or simply gone when withdrawals spiked. The lesson stuck. With a custodial lender, you are exposed to that company's solvency and honesty, not only to the market.

DeFi: a smart contract holds your collateral. With a decentralized protocol, you lock collateral in a smart contract, code running on a blockchain, and borrow against it according to fixed, public rules. No company holds your coins; the contract does. You can read the rules, the LTV limits, and the liquidation logic on-chain before you commit. The tradeoff is that there is no one to call. If the smart contract has a bug or gets exploited, the funds can drain with no support line and no reversal. You also have to manage your own position actively, because the contract will liquidate you on schedule with zero sympathy.

Counterparty risk is the umbrella term. In CeFi, your counterparty is a company that can fail, freeze withdrawals, or misuse your collateral. In DeFi, your counterparty is code that can be exploited and a market that can liquidate you in a flash crash. Neither model removes the risk; they relocate it. Knowing which one you are taking on is the point.

CeFi vs DeFi: which kind of loan?

Both give you the same thing, a loan against crypto you keep, but they feel and fail differently.

CeFi (custodial lenders). A company runs the show. Setup is usually simpler, the interface looks like a normal finance app, support exists, and you may be able to borrow fiat directly to a bank account. You typically go through identity verification. The cost is trust: you are handing your collateral to a business and relying on it to be solvent and honest, including not re-lending your coins behind your back. The Coinbase and Better Bitcoin-backed mortgage sits at the institutional end of this model, a regulated company holding pledged Bitcoin against a home loan.

DeFi (smart-contract protocols). Code runs the show. You connect a self-custody wallet, lock collateral in a contract, and borrow stablecoins against transparent on-chain rules, often with no identity check. You can audit the mechanism before you trust it, and no company can quietly misuse your collateral. The cost is that you are fully responsible: a contract exploit has no refund, a missed top-up gets you liquidated automatically, and there is no human to appeal to.

The tradeoff comes down to this: CeFi trades transparency for convenience and a support line, and asks you to trust a company. DeFi trades convenience for transparency and self-reliance, and asks you to trust code and your own diligence. If a custodial company's failure would ruin you, the lack of a support number in DeFi is not the bigger risk. If managing an on-chain position and reading a contract feels beyond you, the human help in CeFi is worth the counterparty exposure. Match the model to which failure you are better equipped to survive.

What are the benefits?

The appeal is real, which is why the product keeps growing despite the risk.

Liquidity without selling. You get cash or stablecoins while keeping your crypto and any upside it has from here. If you believe the asset will appreciate, a loan lets you spend its value now without giving up the position. That is the whole pitch, and for a long-term holder who needs short-term cash, it can make sense.

No immediate taxable sale. In many jurisdictions, borrowing against an asset is not a taxable event the way selling it is. Selling crypto at a gain can trigger capital gains tax; borrowing against it generally does not, because you still own it. That can let you access value now and defer the tax question. Note the word defer, covered in full below.

Speed and access. These loans tend to fund fast, because the collateral is already digital and the approval often skips the credit checks and paperwork of a traditional loan. Some platforms can release funds within minutes of you posting collateral. DeFi protocols, in particular, do not care about your credit score; the collateral is the only qualification.

What are the risks?

Set against those benefits is a stack of risks that can cost you more than a missed opportunity.

Volatility-driven liquidation. Already the headline risk. Your collateral can drop fast enough to liquidate the loan, force-selling your crypto at a low price, on a timeline you do not control. Drops that size are how this asset normally behaves, not some rare tail event.

Custody and counterparty failure. With a custodial lender, the company can become insolvent, freeze withdrawals, or rehypothecate your collateral into its own losing bets. Several lenders did exactly this in 2022 and customers did not get their assets back. Your collateral being safe depends on a company you may not be able to vet.

Variable rates. If your loan carries a variable interest rate, the cost can climb while the loan is open, turning a cheap loan into an expensive one. A rate that looked reasonable when you borrowed can rise and squeeze you, especially on a loan you planned to hold for a while.

Smart-contract bugs. In DeFi, the code holding your collateral can be exploited. A flaw in the contract, an oracle that feeds it a wrong price, or a governance attack can drain funds with no recourse. You are trusting the code, and code has been drained before.

How do I judge a lender?

Before you post a single coin, work through five things. Treat any platform that is vague on these as a platform to skip.

1. Custody model. Is this a custodial company holding your collateral, or a smart contract you can inspect? Decide which counterparty risk you are taking on, because that choice shapes every other risk on this list.

2. LTV terms and the liquidation line. What is the maximum LTV, at what LTV does liquidation trigger, and is there a margin-call warning before it fires? A platform that liquidates the instant you cross the line, with no notice, is a different animal from one that gives you a window to top up.

3. Liquidation policy in detail. Does it sell only enough collateral to restore a safe ratio, or the whole position? What fee does it charge on a liquidation? Does it use a single price feed or a more resistant oracle that a brief wick cannot trip? The fine print here decides how much you lose if the market moves against you.

4. Track record and transparency. How long has the platform operated, and through what market conditions? Has it survived a real crash? For custodial lenders, look for proof of how they hold assets and whether they rehypothecate. For DeFi protocols, look for public audits and a history without major exploits. A platform that hides how it handles your collateral is telling you something.

5. Rate structure. Is the interest rate fixed or variable, and how is it billed? Are there origination fees, withdrawal fees, or penalties for early repayment? Add up the full cost of holding the loan for as long as you actually plan to, not just the headline rate.

The pattern across all five: a good lender is specific and a bad one is vague. If you cannot get a straight answer on custody, liquidation, and fees before you deposit, you have your answer.

Is the interest tax-deductible, and is borrowing taxable?

Start with the headline, then the caveat. In many places, taking a crypto-backed loan is generally not a taxable event, because you are borrowing against an asset you still own rather than selling it. Selling crypto at a profit can trigger capital gains tax; borrowing against it usually does not. That is the tax appeal of the product.

The word that matters is defer, not erase. You still own the collateral and you still hold the unrealized gain. The tax bill on that gain has not gone away; it waits until you eventually sell. A loan can push that moment further out, but it does not delete the liability. And if your collateral gets liquidated, the forced sale can itself be a taxable disposal, which means a liquidation can hand you a loss and a tax event at the same time.

Whether the interest you pay is deductible depends entirely on your jurisdiction and how you used the borrowed money; in some cases interest on a loan used for investment or business may be deductible, in others it is not. Rules vary by country and change over time.

This is general information, not tax advice. Crypto tax treatment differs by jurisdiction and by your personal circumstances, and it shifts as regulators update their guidance. Before you act on any of this, talk to a qualified tax professional who knows your situation.

Who is this for?

A crypto-backed loan suits a specific kind of borrower: someone with crypto they intend to hold long term, who needs liquidity for a defined period, who understands the liquidation mechanic, and who borrows at a low LTV with extra collateral on hand to top up. If you fit that profile, treat the loan, watch the LTV like a hawk, and have a plan for a 40% drawdown, it can be a genuine tool. The Bitcoin-backed mortgage is this same logic at the institutional end: a long-term holder who would rather pledge than sell.

It is the wrong move for most people in most situations. If you would be ruined by losing the collateral, do not post it. If you cannot watch the position and top it up during a crash, do not take a loan that can liquidate you while you sleep. If you are borrowing because you are stretched and out of options, a loan secured by an asset that can fall 30% in a day will make a bad situation worse, fast. And if you do not understand exactly what triggers liquidation and where your collateral physically sits, you are not ready to borrow yet. Learn the mechanism first; the loan will still be there.

The product is leverage on a volatile asset, dressed up as a loan: neither a scam nor a free lunch. Used by a disciplined holder at a conservative LTV, it does a real job. Used to stretch a thin position, it is the fastest way to turn a price dip into a permanent loss.