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A Bitcoin-backed loan lets you borrow the currency or stablecoin specified in the agreement by pledging Bitcoin as collateral. The Bitcoin is restricted under the loan’s rules while the debt is outstanding; if the collateral value falls far enough or you do not meet a contract requirement, the lender or protocol may sell some or all of it. Your loan agreement—not a universal industry threshold—sets the LTV limits, cure period, fees, repayment terms, and conditions for releasing the Bitcoin.
How a Bitcoin-backed loan works
You pledge Bitcoin to secure a debt and receive the loan proceeds described in the agreement. The collateral may be held by a lender or custodian, placed in a platform-controlled arrangement, locked in a smart contract, or held in multisignature escrow. The arrangement determines who can move the Bitcoin and under what conditions. The IMF’s overview of crypto lending and borrowing describes centralized platforms as potentially taking custody or ownership of deposited assets, while decentralized platforms may lock assets through smart contracts; those general descriptions do not establish the legal protections of any particular loan.
After you satisfy the agreement’s repayment and other release conditions, the collateral can be returned. Until then, you should treat it as encumbered: you may not be able to transfer or use it freely, and a contractual trigger can allow a sale to cover the debt.
What LTV means and why it changes
Loan-to-value (LTV) compares the outstanding loan balance with the current value of the pledged Bitcoin:
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LTV = outstanding loan balance ÷ current collateral value × 100
For example, Coinbase illustrates that a $100 balance secured by $1,000 of collateral is 10% LTV. Its loan-health definition includes principal and accrued, unpaid interest in the balance. Coinbase’s loan-health documentation also explains that lower LTV indicates lower liquidation risk, not that liquidation is impossible.
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LTV can rise if Bitcoin’s price falls, if you borrow more, or if unpaid interest accrues. It can fall if you repay debt or the collateral’s market value rises. A lower starting LTV leaves more room for a price decline before a threshold is reached, but it does not remove custody, platform, contract, or market risk.
For a hypothetical illustration, a $50,000 balance against Bitcoin worth $100,000 is 50% LTV. If the collateral value then falls to $75,000 and the balance stays unchanged, LTV becomes about 66.7%. This example does not predict how a lender will value collateral or when it will act; the contract determines those details.
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What happens when Bitcoin’s price drops
A falling collateral value pushes LTV upward if the debt balance does not fall at the same time. Depending on the agreement, the lender may first issue a margin call—a notice to add collateral or repay part of the balance by a deadline. If the borrower does not cure the shortfall, or LTV reaches a liquidation trigger, the lender or protocol may sell some or all of the Bitcoin. Some agreements provide for partial liquidation; others may permit a larger sale. Notice requirements, grace periods, sale fees, and execution methods are contract-specific.
The following figures are examples of distinct provider or contract terms, not market-wide standards. “Margin ratio” in the corporate facility is collateral value divided by debt, the inverse of LTV; the approximate LTV equivalents are shown for comparison.
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| Example and source | Starting level | Call or warning | Liquidation terms |
|---|---|---|---|
| Corporate facility described in a 2026 SEC filing: SEC filing | 150% initial margin ratio, approximately 66.7% maximum LTV | At a 130% margin ratio, approximately 76.9% LTV, the lender issues a call. The filing specifies 24 hours to add Bitcoin or make a partial repayment. As of July 31, 2026, the filing said a roughly 22.3% collateral-value decline, assuming no repayment or added collateral, would reach this call ratio. | At a 120% margin ratio, approximately 83.3% LTV, if uncured, the lender may exercise rights that include liquidation. The filing specifies a spot reference rate for valuing the Bitcoin. |
| Onramp’s description of partner Arch terms, accessed 2026: Onramp Help Center | Origination LTV may be up to 50% | 70% LTV triggers a margin call | At 80% LTV, partial liquidation may occur; the article says only the amount considered necessary to restore LTV to 50% is sold. Terms may vary with market conditions, loan size, and eligibility. |
| BTCBacked’s product-page terms: BTCBacked borrowing page | Not stated on the cited page as a maximum origination LTV | Warnings are described at 75%, 80%, and 85% LTV | Liquidation is described at 90% LTV, with a fee equal to 5% of the original loan amount if liquidation occurs. |
| Coinbase / Morpho markets: Coinbase loan-health documentation | Not stated as one universal starting LTV | Not stated as one universal call threshold; liquidation LTV is predetermined for each Morpho market and varies by collateral asset. | Coinbase warns that loan protection does not guarantee against liquidation, including when volatility or technical issues interfere. |
These examples cannot be combined into a single “normal” threshold. Before borrowing, calculate the collateral-price decline that would bring your specific loan to its call and liquidation levels, then assess whether you could add collateral or repay within the actual cure window.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Who controls the Bitcoin
Custody and control vary by product. In a centralized arrangement, a provider or custodian may hold the assets; in a smart-contract arrangement, code governs how locked collateral can move. A multisignature escrow can distribute signing authority among multiple keyholders, but the precise rights still depend on the arrangement and its contract.
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BTCBacked says its collateral is held in 2-of-3 multisignature escrow, that the borrower holds one key and may store it on a hardware wallet, and that collateral is not rehypothecated. These are the provider’s descriptions of its own setup, not independent proof of risk-free custody and not terms that apply to other lenders. BTCBacked’s borrowing page describes that arrangement.
- Identify who holds each key and who can authorize a transfer, including what happens if a keyholder is unavailable.
- Check whether the provider can reuse or lend out collateral, and what the agreement says about insolvency or a service outage.
- Find out whether on-chain activity can be verified and what exact steps release the Bitcoin after repayment.
- If the arrangement supports a borrower-held key, a compatible hardware wallet may store it; that does not prevent a price-triggered liquidation or replace review of the contract.
Repayment, term, and fees
Repayment rules determine how the debt changes over time and what you must do to recover the collateral. Check whether payments reduce principal or cover interest only, whether interest is fixed or variable, when the loan matures, and whether early repayment or an extension is allowed. A rollover may require lender approval or a reassessment of collateral and terms.
| Example | Term and repayment details described by the source | Fees described by the source |
|---|---|---|
| Onramp / Arch terms: Onramp Help Center | Fixed terms up to two years; early repayment without penalties; rollover may be possible after reassessment of collateral and terms. | Not stated in the cited article details summarized here. |
| Corporate facility: SEC filing | Initial one-year term; prepayment is allowed after three months without penalty; the filing describes renewal provisions. | Not stated in the cited filing details summarized here. |
| BTCBacked: BTCBacked borrowing page | The cited page describes a platform charge based on loan term, but the details here do not establish a repayment schedule or maturity date. | A platform charge equal to 1.5% per year of the loan term, paid once, and a 5% liquidation fee if liquidation occurs. |
These are different product and contract examples, not a standard rate or fee schedule. Also check for transaction, custody, origination, or other charges in the agreement. Tax treatment depends on jurisdiction and individual circumstances; these loan terms do not establish that borrowing is tax-free.
Quick Recap
What to verify before pledging Bitcoin
- Collateral and starting LTV: Confirm how the lender values Bitcoin, what balance counts as debt, and how much collateral you must pledge.
- Call and liquidation mechanics: Record the trigger levels, notice method, cure deadline, partial- versus full-sale rules, and any liquidation charge.
- Repayment obligations: Understand the interest calculation, payment schedule, maturity, early-payoff terms, and whether an extension is discretionary.
- Custody and recourse: Establish who controls the keys, whether collateral may be reused, and the stated process for outages, insolvency, and collateral release.
- Eligibility and jurisdiction: Verify that the product is available to you and that the written agreement matches the terms presented for your location and loan size.
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
