Bitcoin-Backed Loans: Complete Guide

How Bitcoin-Backed Loans Work

The process is straightforward. You deposit Bitcoin into a lending platform as collateral. The platform provides a loan, typically in USDC, USDT, DAI, or fiat currency, based on an agreed LTV ratio. For example, depositing 1 BTC worth $60,000 at 50% LTV gives you a $30,000 loan. You pay interest on the loan, usually monthly or continuously. When you are ready, you repay the principal plus any accrued interest and receive your Bitcoin back. The loan term may be open-ended (no fixed repayment date) or fixed (specific term length). During the loan period, your Bitcoin is held as collateral and you cannot trade or transfer it. The platform monitors the collateral value continuously, and if Bitcoin's price drops enough to push your LTV above the liquidation threshold, your BTC may be partially or fully sold.

Platform Options

CeFi platforms offering Bitcoin-backed loans include Nexo, Ledn, and Unchained. Nexo allows instant loans against BTC with flexible repayment. Ledn specializes in Bitcoin financial services and offers competitive rates with clear terms. Unchained uses a collaborative custody model where your Bitcoin is held in multisig, giving you more control. In DeFi, borrowing against wrapped Bitcoin (WBTC) is available on Aave, Compound, and MakerDAO. WBTC is an ERC-20 token backed 1:1 by Bitcoin, held by a custodian (BitGo). This introduces an additional trust assumption compared to native Bitcoin. Newer solutions like Threshold Network offer tBTC as a more decentralized Bitcoin wrapper. For Bitcoin-native solutions, Stacks network enables lending protocols that use actual BTC. When choosing a platform, consider custody model, interest rates, LTV options, and the platform's financial health and track record.

LTV Ratios and Interest Rates

LTV ratios for Bitcoin loans typically range from 20% to 80% depending on the platform. Conservative platforms offer 25-50% LTV, providing significant buffer against price drops. More aggressive platforms allow up to 70-80% LTV but with higher liquidation risk. Interest rates vary from approximately 2% to 12% APR depending on the platform, LTV chosen, and market conditions. Some platforms offer tiered rates: lower LTV ratios get lower interest rates because the loan is less risky for the lender. For example, Nexo may charge 0% APR at very low LTVs for premium users, while standard rates might be 6-12%. DeFi rates on WBTC borrowing fluctuate based on supply and demand, typically 1-5% for stablecoin loans against WBTC. Compare the total cost of borrowing including any platform fees, withdrawal fees, and the opportunity cost of locked collateral.

Tax Advantages

The primary tax advantage of Bitcoin-backed loans is avoiding a taxable sale. In most jurisdictions, selling Bitcoin triggers capital gains tax on the appreciation. By borrowing against Bitcoin instead, you access liquidity without a taxable event. For long-term holders sitting on significant unrealized gains, this can represent substantial tax savings. For example, if you hold Bitcoin with $50,000 in unrealized gains and face a 20% capital gains rate, selling would cost $10,000 in taxes. Borrowing against the Bitcoin and paying 5% interest on a $30,000 loan costs $1,500 per year, significantly less. However, the interest paid on crypto loans is generally not tax-deductible for personal use in most jurisdictions. If the funds are used for investment purposes, interest may be deductible. And if your Bitcoin is liquidated, the forced sale is a taxable event. Consult a tax professional in your jurisdiction.

Risks and Considerations

The primary risk is liquidation during a Bitcoin price drop. If Bitcoin falls 50% and your LTV was 50%, you are at 100% LTV and fully liquidated. Always borrow at a lower LTV than the maximum offered and have a plan for adding collateral during downturns. Counterparty risk is significant for CeFi platforms: if the platform becomes insolvent (as happened with Celsius and BlockFi), your collateral may be at risk. Evaluate platform financials, proof of reserves, and regulatory status. For WBTC in DeFi, there is custodian risk (BitGo holds the underlying BTC) and smart contract risk. Interest rate risk exists for variable-rate loans: rates can increase substantially during high-demand periods. Consider the total cost over your expected loan duration, including potential rate increases. Currency risk exists if you borrow in a fiat currency and Bitcoin's price changes significantly, affecting your ability to repay.