A complete guide to bitcoin lending: how collateral, LTV, liquidation, DeFi vs CeFi custody, interest rates, and real use cases work for BTC holders.
Arkadii Kaminskyi
Arkadii Kaminskyi
Head of Operations at Sats Terminal
Head of Operations at Sats Terminal with 5 years of experience in crypto. Specializes in DeFi, yield farming, and borrowing — has reviewed 50+ crypto products.
Bitcoin lending has grown from a niche experiment into a multi-billion-dollar market that lets holders put idle BTC to work without parting with it. Whether you want to earn yield by supplying liquidity, or you want to borrow stablecoins against your Bitcoin stack without triggering a taxable sale, this guide covers everything: the mechanics, the risks, the platforms, the rate environment, and who should actually consider it. By the end you will know exactly how bitcoin lending works, what separates DeFi from CeFi custody models, and how to evaluate any offer you come across.
At its core, bitcoin lending is the practice of using Bitcoin as a financial instrument in a credit relationship — either by supplying BTC to earn interest, or by locking BTC as collateral to borrow other assets. The market has two distinct sides, and most of the public conversation conflates them, so it helps to separate them clearly from the start.
On the supply side, a holder deposits Bitcoin into a lending pool or with a custodial lender. The platform lends that BTC out to borrowers, and the depositor receives a yield — typically expressed as an annual percentage yield (APY). This is sometimes called "Bitcoin savings" or "Bitcoin earning," and it is structurally similar to depositing cash in a high-yield account, except that the risks are fundamentally different.
On the borrow side, a Bitcoin holder locks up BTC and receives a loan — usually in stablecoins like USDC or USDT, sometimes in fiat currency, occasionally in other crypto assets. The borrower retains long-term exposure to Bitcoin price appreciation while gaining immediate spending power in a stable currency. This is the most common use case for holders who believe Bitcoin will be worth significantly more in the future and do not want to realize a capital gain now.
For a broader introduction to how these mechanics apply beyond Bitcoin specifically, see our guide on what is crypto lending. This article focuses specifically on Bitcoin as the collateral and lending asset.
Understanding the two-sided nature of this market is essential because the risk profile, custody model, and terminology differ sharply depending on which side you are on.
When you supply Bitcoin to a lending market, your BTC is either pooled into a lending pool (common in DeFi) or held by a custodian who lends it to institutional borrowers (common in CeFi). In both cases, the interest rate you receive is driven by demand from borrowers. When demand for borrowed BTC is high — for instance, during a bull market when traders want to short Bitcoin or when arbitrage opportunities are plentiful — supply rates rise. When demand drops, rates fall.
In DeFi, the utilization rate — the percentage of deposited assets currently lent out — is the primary input into interest rate models. Protocols like Aave use algorithmic rate curves that push borrowing rates up sharply as utilization approaches 100%, which also pulls supply rates up. This dynamic plays out automatically and transparently on-chain.
In CeFi, rates are set by the platform and may be fixed for a period or adjusted periodically. CeFi lenders typically lend BTC to institutions — hedge funds, market makers, OTC desks — and pass a portion of the interest back to depositors.
Borrowing against Bitcoin is more commonly what people mean when they search for "bitcoin lending." The core idea: you lock BTC, you receive stablecoins or fiat, you repay the loan (plus interest) to unlock your BTC. Your Bitcoin is never sold; it is merely pledged as security.
This matters enormously for long-term holders. Selling BTC in most jurisdictions triggers a capital gains tax event. Borrowing against it does not — you are simply taking out a loan secured by an asset, which is structurally identical to a margin loan or a home equity line of credit. For a deeper look at the tax angle, our use case page on avoiding taxable events with a BTC loan explains the logic in detail (though always consult a tax professional for your specific situation).
The borrower continues to hold the BTC — meaning they benefit (or suffer) from price movements during the loan term. If BTC doubles while the loan is outstanding, the borrower's net worth increases because their collateral is worth far more than their debt. If BTC drops sharply, they risk liquidation.
For the comprehensive view of borrowing specifically, our 2025 complete guide to Bitcoin borrowing is the companion piece to this article.
The mechanics of a Bitcoin-backed loan differ from a traditional bank loan in one critical way: there is no credit check, no income verification, no underwriting based on personal financial history. The loan is secured purely by the collateral. This makes the math of collateral ratios the most important thing to understand.
The loan-to-value ratio (LTV) is the ratio of the loan amount to the value of the collateral. If you deposit $100,000 worth of Bitcoin and borrow $60,000 in USDC, your LTV is 60%. Platforms set a maximum LTV — the highest ratio they will allow at the time of origination — and a liquidation LTV — the ratio at which your collateral gets sold to repay the loan.
As of early 2025, typical LTV structures look like this:
The guide to understanding collateral and LTV explains these ratios in depth and shows how to calculate your personal buffer.
Bitcoin-backed loans are overcollateralized — you must deposit more value in collateral than you receive in loan proceeds. This is the defining feature that makes these loans possible without credit checks: the protocol does not need to trust you because it holds more value than it lends. If you default (by refusing to repay or failing to maintain the required ratio), the protocol can liquidate your collateral to recover the loan.
Overcollateralization feels inefficient compared to traditional finance, and it is — you are locking up $100,000 to borrow $60,000. But this is the price of permissionless, trustless access to credit. No bank can deny you a Bitcoin-backed loan because your credit score is too low.
Liquidation is the mechanism that keeps the system solvent. When your health factor (the protocol's measure of how safe your position is) drops below 1.0 — meaning your collateral value is approaching or reaching the liquidation threshold — the protocol allows third-party liquidators to repay a portion of your debt in exchange for receiving your collateral at a discount (the liquidation bonus).
For example, if Bitcoin drops 30% and your LTV crosses the liquidation threshold, a liquidator might repay 50% of your USDC debt and receive 55% of your collateral value — the extra 5% being the liquidation bonus. You keep the remaining collateral, minus what was seized, and your loan is reduced.
Liquidation is not always a total wipeout, but it can be deeply painful. The best protection is maintaining a conservative LTV — many experienced borrowers keep their ratio at 40-50% and only borrow against large BTC price drops as an opportunity. Our guide on managing liquidation risk covers the strategies in detail, including the use of alerts and top-ups to avoid liquidation.
Interest on Bitcoin-backed loans accrues continuously or periodically depending on the protocol. In DeFi, it typically accrues block-by-block. In CeFi, it may accrue daily or monthly. In either case, unpaid interest increases your outstanding debt, which in turn increases your effective LTV over time — meaning a loan that starts at 60% LTV will slowly drift upward even if the BTC price is flat. Borrowers who hold loans for extended periods need to monitor this drift or make periodic interest payments.
The most consequential decision in bitcoin lending is not which interest rate to accept — it is who holds your Bitcoin during the loan. This is the DeFi versus CeFi split, and it determines your counterparty risk, your privacy, your access requirements, and your recourse if something goes wrong.
| Feature | DeFi (e.g., Aave, Morpho) | CeFi (e.g., Ledn, Nexo) |
|---|---|---|
| Custody of BTC | Smart contract (self-custodial) | Platform holds your keys |
| KYC required | Usually none | Almost always required |
| Transparency | Fully on-chain, auditable | Limited; depends on proof-of-reserves |
| Counterparty risk | Smart contract risk | Platform insolvency / fraud risk |
| Rate flexibility | Variable (algorithmic) | Fixed or variable; negotiable at scale |
| Loan currency | Stablecoins (USDC, USDT, DAI) | Stablecoins or fiat |
| Minimum loan size | Low (any amount) | Often $1,000-$10,000+ |
| Speed | Minutes (on-chain) | Hours to days |
| Liquidation | Automated, on-chain | Manual or algorithmic; varies |
| Recourse if hacked | Protocol insurance / none | Platform's discretion |
In DeFi, your Bitcoin is locked in a smart contract — code that executes autonomously according to predefined rules. No human can move your collateral without the contract's conditions being met. This is powerful but also means that smart contract bugs or oracle failures can create losses that no entity is liable to cover.
In CeFi, you hand your Bitcoin to a company. If that company fails — as BlockFi, Celsius, and Voyager all did in 2022 — you become an unsecured creditor in a bankruptcy proceeding. The returns of CeFi lending became catastrophically clear in that cycle. That said, CeFi has advantages: fiat disbursement, fixed rates, regulatory insurance in some jurisdictions, and simpler user experience.
For a deeper comparison including platform-by-platform breakdown, read our analysis of DeFi vs CeFi: how to choose the right Bitcoin loan in 2025.
It is worth noting that "DeFi" and "CeFi" are endpoints on a spectrum, not binary categories. Some platforms use smart contracts for collateral management but rely on centralized teams for rate-setting or liquidation. Others use multi-signature wallets that require both user and platform approval. Understanding exactly who controls the keys at each stage of your loan is essential — see our glossary entries for self-custody and multisig wallets for the technical details.
Not all Bitcoin-backed loans are structurally the same. The type of loan you choose affects your interest rate risk, your repayment flexibility, and even what currency you receive. Here are the main dimensions to understand.
A variable interest rate changes over time based on market conditions. In DeFi, rates update algorithmically — sometimes daily, sometimes block-by-block. A loan that starts at 4% APR might be 8% APR six months later if demand for borrowed stablecoins spikes. Variable rates work well when rates are low and stable, but they introduce uncertainty for long-term borrowers.
A fixed interest rate is locked for the loan term. You know exactly what you will pay, regardless of market movements. Fixed-rate Bitcoin loans are less common in DeFi — they typically require specialized protocols or over-the-counter arrangements — but CeFi lenders often offer them. The tradeoff is that fixed rates are usually higher than the prevailing variable rate at the time of origination, because you are paying for certainty.
Our dedicated guide on variable vs fixed interest rates walks through the math of when each option wins.
Most DeFi bitcoin lending produces stablecoin loans. You deposit BTC, and you receive USDC, USDT, or DAI directly to your wallet. These stablecoins are immediately usable in DeFi or can be converted to fiat through an exchange. There is no bank transfer, no waiting period, no identity verification on the DeFi side.
CeFi lenders often offer fiat loans — actual US dollars, euros, or other currencies wired to your bank account. This is valuable for borrowers who need to pay rent, cover business expenses, or make purchases that require traditional fiat. Fiat loans require KYC, banking relationships, and typically take longer to disburse.
On most DeFi protocols, Bitcoin cannot be used directly because Bitcoin runs on its own blockchain and DeFi protocols run on Ethereum, Arbitrum, Base, and similar smart contract chains. This creates the need for wrapped Bitcoin — tokenized representations of BTC on other chains, backed 1:1 by actual Bitcoin held in custody.
The most common forms are wBTC (Wrapped Bitcoin on Ethereum), BTCB (BTC on BNB Chain), and cbBTC (Coinbase's wrapped BTC on Base). Each has different custodian arrangements and trust assumptions. When you use a DeFi lending protocol, you (or a platform acting on your behalf) must bridge your BTC to one of these wrapped forms first. This introduces bridging and wrapping risk — if the custodian holding the underlying BTC is compromised, the wrapped token loses its peg.
For the full technical picture, see bridging and wrapping Bitcoin explained.
Interest rates in bitcoin lending are not arbitrary. They are the output of supply and demand dynamics that differ meaningfully between DeFi and CeFi. Understanding how rates are determined helps you predict when rates will be favorable and when to lock in or avoid borrowing.
DeFi lending protocols use algorithmic interest rate models. The core input is utilization — the share of deposited assets currently borrowed. At low utilization, rates are low to attract borrowers. As utilization climbs, the model raises rates to attract more supply and discourage additional borrowing. Most protocols have a "kink" in the curve at optimal utilization (often 80-90%) where rates begin rising steeply to prevent the pool from running dry.
The practical result: borrowing rates for USDC against wBTC on Aave v3 have historically ranged from roughly 2% to 15% APR depending on market conditions. Bull markets tend to push stablecoin borrowing rates higher because demand surges. Bear markets often see rates collapse to 2-4%. These are not guaranteed ranges — they reflect historical patterns, not predictions.
Supply rates (what depositors earn) track borrowing rates minus a protocol spread. At 10% borrowing rate and 90% utilization, depositors might earn 8-9% APY. At 4% borrowing rate and 60% utilization, depositors might earn 1.5-2% APY.
CeFi lenders set rates based on their cost of funds, their lending margins, and their assessment of institutional borrower demand. Rates tend to be more stable than DeFi — they change less frequently and are typically negotiated for a fixed term. Some CeFi platforms publish their rates; others require you to submit an application to receive a quote.
Borrowing rates in CeFi for Bitcoin-backed stablecoin or fiat loans have generally ranged from 6% to 14% APR over the past few years, though top-tier institutional borrowers with large positions can negotiate significantly below these ranges. For a comprehensive breakdown of what constitutes a good rate, see crypto lending rates explained for 2025.
Because rates vary substantially across protocols and platforms — and because DeFi rates can shift week-to-week — manually comparing offers is time-consuming and error-prone. This is one of the core problems that lending aggregators solve. Rather than visiting each protocol individually, an aggregator pulls current rates across multiple lenders and presents them in a single interface. See our explainer on how lending aggregators find the best rates for a technical breakdown of how this works.
Bitcoin lending carries real, meaningful risks. Anyone who presents it as a simple "put your Bitcoin to work" proposition without discussing these risks is not giving you the full picture. Here is an honest accounting of the main risk categories.
This is the most immediate risk for borrowers. If Bitcoin's price drops significantly and you cannot add collateral or repay debt quickly enough, your position will be liquidated. In a fast market crash — Bitcoin has dropped 30% in a single day on multiple occasions historically — there may not be time to react manually. You need either a very conservative LTV or automated alerts and top-up mechanisms.
Keeping your LTV below 50% at origination gives you a substantial price buffer. If you borrow at 50% LTV and liquidation occurs at 80% LTV, Bitcoin would need to drop 37.5% before you face liquidation. That is meaningful but not unlimited protection in a severe bear market. Our FAQ on the risks of borrowing against Bitcoin covers this in practical terms.
DeFi lending protocols are software. Software has bugs. Despite rigorous audits, every major DeFi protocol has experienced at least one incident — whether an exploit, a governance attack, or an oracle manipulation. When a smart contract is exploited, funds can be drained and there is typically no recourse. Protocol insurance products exist but often cover only a fraction of deposited assets and have complex claim processes.
Mitigations: use protocols with long audit histories, significant TVL, and active bug bounty programs. Aave and Morpho are among the most battle-tested DeFi lending protocols as of 2025. See smart contract security and audits for a framework to evaluate protocol safety.
When you hand your Bitcoin to a CeFi lender, you are trusting that organization completely. If the platform is insolvent, fraudulent, or hacked and cannot cover losses, your Bitcoin may be gone. The 2022 collapses of Celsius, BlockFi, and Voyager wiped out billions in customer funds — funds that were thought to be safely earning yield. Counterparty risk is not theoretical; it has materialized repeatedly in this industry.
Mitigations: research the platform's proof of reserves, avoid keeping large balances with any single CeFi custodian, understand whether deposits are insured and at what limit.
In DeFi, the price of your Bitcoin collateral is read from an oracle — a price feed that reports BTC's market price to the smart contract. If the oracle is manipulated or fails, the contract may execute liquidations at incorrect prices or fail to trigger them when it should. Oracle manipulation attacks have caused significant losses in DeFi lending markets. Protocols mitigate this with multiple oracle sources and time-weighted averages, but the risk is not zero.
As noted earlier, most DeFi lending requires your BTC to exist as a wrapped token on another chain. The custodian holding the underlying BTC is a point of failure. Additionally, bridges themselves have been exploited for billions of dollars across the industry. These risks are real and should factor into your decision to use DeFi lending versus a CeFi lender who holds native Bitcoin. For a comprehensive view of all these risks in one place, our article on crypto lending risks every borrower should know is essential reading.
Your borrowed USDC or USDT is only as reliable as the issuer. Circle's USDC briefly de-pegged to $0.87 in March 2023 when Silicon Valley Bank — which held $3.3 billion of Circle's reserves — failed. The peg recovered within days, but the event illustrated that stablecoins carry issuer and reserve risk. Understanding stablecoin risks is important if you plan to hold borrowed stablecoins for any meaningful period.
The regulatory landscape for crypto lending is evolving rapidly across jurisdictions. Some platforms have restricted access to users in certain countries. Future regulations could require KYC on DeFi platforms, restrict interest-bearing accounts, or impose other requirements that change the terms of your loan or your ability to access your collateral. The regulatory landscape for crypto lending is worth reviewing for your jurisdiction before committing significant capital.
Bitcoin lending is not a one-size-fits-all product. It is genuinely useful for certain situations and genuinely dangerous for others. Here are the real-world use cases where it tends to make sense.
The most natural use case: you have significant Bitcoin wealth but limited liquid cash. You need money for a home down payment, a business investment, or a large purchase, and selling BTC means realizing capital gains and permanently exiting your position. A Bitcoin-backed loan lets you access value without selling. For concrete examples, see use cases like paying a real estate down payment with Bitcoin or covering emergency expenses with Bitcoin.
Founders and business owners who hold significant Bitcoin on their personal balance sheet can use it as collateral for business working capital rather than taking dilutive equity financing or high-interest business loans. This is especially relevant for Bitcoin-native businesses or tech founders who accumulated Bitcoin early. For longer-term treasury management, see crypto-native company treasury management.
Investors who want to rebalance their portfolio — moving from high-BTC concentration to a more diversified allocation — can borrow against BTC and use the proceeds to buy other assets, rather than selling BTC and triggering a taxable event immediately. This is a sophisticated strategy with real tax implications; see tax-efficient portfolio rebalancing with Bitcoin for the logic.
Some Bitcoin holders use loans to dollar-cost average into additional Bitcoin purchases. They borrow stablecoins against existing BTC, buy more BTC, and effectively increase their Bitcoin position with leverage. This is a high-risk strategy that compounds liquidation risk — but it is a real use case among aggressive holders who have high conviction in Bitcoin's long-term trajectory.
Corporations and institutional Bitcoin holders use lending to manage liquidity without liquidating strategic positions. For a detailed look at this use case, our guide on institutional crypto lending covers structures, counterparties, and due diligence requirements at scale.
Bitcoin lending is not appropriate for holders with a short time horizon, high volatility tolerance without the capital reserves to withstand a crash, or those who would be financially devastated by a liquidation. If you are borrowing at 70% LTV because you "need" the money and cannot add collateral if BTC drops 20%, you are taking on excessive risk. The loan should be a tool, not a lifeline.
The problem with bitcoin lending is not that good products do not exist — it is that the market is fragmented. Dozens of DeFi protocols and CeFi lenders offer Bitcoin-backed loans, each with different rates, different chains, different LTV limits, and different custody models. Comparing them manually requires visiting each platform, understanding different interfaces, and tracking rate changes over time. Most people simply pick the first or most familiar option and leave value on the table.
Borrow by Sats Terminal is an aggregator that solves this directly. It connects to multiple DeFi protocols — including Aave v3 and Morpho Blue — across multiple chains (Base, Ethereum, Arbitrum, Polygon, Optimism, and BNB Chain) and presents the current offers side-by-side so you can compare rates, LTV limits, and terms in one place. You pick the offer that fits your needs; Borrow handles the cross-chain bridging and wrapping automatically.
A few things worth knowing about how Borrow works:
For a full walkthrough of how the platform works, see the FAQ on how Borrow works or the guide to how Bitcoin-backed loans work on the Borrow learn center.
Borrow is best understood as a comparison engine for Bitcoin-backed loans — similar to how a mortgage broker surfaces multiple lenders' rates without you applying to each individually, except the execution happens on-chain in minutes rather than weeks. If you want to understand how it compares to going directly to individual protocols, our article on how crypto lending works covers the full mechanics.
If you are ready to explore a Bitcoin-backed loan, here is a practical sequence to follow. This applies whether you end up using Borrow by Sats Terminal or evaluating platforms independently.
Before touching any platform, be clear about why you are borrowing and how much you need. Precision matters here: borrowing exactly what you need at a conservative LTV is very different from borrowing as much as a platform will give you. Decide on a target LTV — most conservative borrowers aim for 40-50%.
At 50% LTV, borrowing $30,000 requires $60,000 in Bitcoin collateral. At current Bitcoin prices, calculate exactly how much BTC you need to deposit. Leave a buffer — do not use all of your BTC as collateral if you might need it for a top-up later. Our learn article on optimizing your LTV ratio has a calculator-style walkthrough.
Check current rates across at least three sources: a DeFi aggregator view (Aave, Morpho), a CeFi lender, and an aggregator like Borrow by Sats Terminal that shows you multiple simultaneously. Pay attention not just to the interest rate but to the liquidation threshold, the maximum LTV, and the supported loan currency. A lower interest rate at a more aggressive liquidation threshold can be more dangerous than a higher rate with more breathing room.
Before depositing any BTC, confirm: who controls the keys during the loan? Is the collateral in an audited smart contract? Is the platform custodial or non-custodial? What happens if the platform is hacked or goes bankrupt? Review our guide on custodial vs non-custodial lending to understand the difference and what to look for.
Once your loan is active, you need to monitor your health factor actively. Most DeFi platforms provide on-chain data; many have apps or third-party dashboards that can send alerts when your health factor approaches a threshold. Decide in advance what action you will take if BTC drops 20%, 30%, or 40% — will you add collateral, repay part of the loan, or accept the risk? Pre-planning this avoids panic decisions during volatile markets. See monitoring your crypto loan health for practical tools and thresholds.
Bitcoin-backed loans are open-ended on most DeFi platforms — there is no fixed repayment date. This is convenient but can lead to interest accumulating indefinitely. Have a concrete plan: will you repay from income, from stablecoin earnings, or from eventual BTC sales? Understand that the longer the loan runs, the higher the total interest cost and the more your effective LTV drifts upward. Our guide on repaying crypto loans strategically covers timing and tax considerations.
Common Questions
In most jurisdictions, borrowing against Bitcoin as collateral is legal — it is treated similarly to a margin loan or asset-backed loan in regulatory frameworks. Lending your Bitcoin to earn yield is more complex and may be treated as an investment contract or securities activity in some jurisdictions. Regulations vary significantly by country and are evolving rapidly. Always verify the regulatory status in your specific jurisdiction before participating, particularly if you are earning yield on BTC. The regulatory landscape for crypto lending is a good starting reference.
