Borrow Against Bitcoin: LTV, Liquidations, Custody Design, and 2026 Rates

If you hold Bitcoin and need liquidity, the cleanest move often isn’t selling—it’s collateralizing. Bitcoin-backed loans let you borrow dollars or stablecoins while keeping price exposure and, in many jurisdictions, sidestepping a taxable sale. The catch is structural: your collateral trades 24/7 with sharp drawdowns, so the way your BTC is held and how liquidations trigger matters more than anything else.

What a Bitcoin-backed loan is - It’s a secured loan where BTC serves as collateral. You lock Bitcoin with a lender or in a smart contract and receive a smaller amount in fiat (e.g., USD) or a stablecoin (e.g., USDC). Your BTC unlocks when you repay principal plus interest. - Credit underwriting is collateral-first, so identity checks may be light or unnecessary in DeFi and limited in some CeFi products. - Two models: - Centralized (CeFi): companies like Ledn, Strike, Unchained, Nexo, and Coinbase custody BTC (directly or via a qualified custodian) after KYC. - Decentralized (DeFi): protocols such as Aave and Morpho hold collateral in smart contracts. Native BTC typically needs to be wrapped on another chain first. Wrapped BTC is a tokenized representation—backed 1:1 by BTC in custody—so it can interact with DeFi.

How LTV and liquidations actually work - The key metric is loan-to-value (LTV). Industry ranges typically sit around 30%–70%, with many lenders starting near 50%. At 50% LTV, $100,000 in BTC secures a $50,000 loan. - As Bitcoin falls, LTV rises. Cross preset thresholds and: - Margin call: add collateral or partially repay. - Liquidation: the lender or contract sells some or all of your BTC to cover the debt (automated in DeFi). - Terms vary. Some loans are fixed (e.g., 12 months with monthly interest). Others, like Coinbase’s on-chain loans via Morpho in most U.S. states, have no monthly payments and no set maturity; interest accrues to the balance. - Rehypothecation—lenders re-lending customer collateral—was central to the 2022 blowups. Many platforms now state they do not rehypothecate.

Why custody design is the real risk control The 2022 collapses (Celsius, BlockFi, others) were a reminder: custody, not yield, decides your fate in stress. The market has since rebuilt with tighter guardrails. Unchained’s “collaborative custody” holds collateral in a 2-of-3 multisig vault—one key with the borrower, one with Unchained, one with an independent key agent—so no single party can move coins. In CeFi, several lenders now emphasize segregated collateral and no rehypothecation. In DeFi, liquidation logic is transparent but introduces smart contract and bridge risk.

Those design choices have scaled into traditional finance. In February 2026, Ledn closed a $188 million Bitcoin-backed asset-backed securitization; S&P Global assigned the $160 million senior tranche a preliminary BBB- rating—described as the first investment-grade mark for a Bitcoin-collateralized lending portfolio. According to Galaxy Research, centralized lending has more than tripled from its late-2023 low, and total crypto-backed loan volumes hit $56.16 billion in Q2 2026—down 16.8% quarter-on-quarter as borrowers trimmed leverage—with CeFi balances now above DeFi.

Who’s lending against BTC right now - Ledn: Bitcoin-first lender; custodied collateral that isn’t re-lent. - Unchained: commercial loans with borrower-held key in a 2-of-3 multisig vault. - Strike: loans for individuals and businesses in select U.S. states. - Coinbase: on-chain loans via the Morpho protocol, available in most U.S. states. The company says it’s passed $1 billion in originations. - Aven: Bitcoin-backed Visa credit line (launched April 2026) with limits up to $1 million. - Nexo: instant credit lines against BTC and 100+ assets, geared mainly to non-U.S. users. - Aave: DeFi borrowing against wrapped BTC.

What it costs (October 2026) - Coinbase: published rates start around 5.8%. - SALT: 7.49%–10.5% APR. - Ledn: 11.49% APR under $250,000; down to 9.25% for $2 million+. - Strike: 10.5%–13% APR with monthly interest; about 1 percentage point more if interest is paid at maturity. - Unchained: 12% interest rate, or 14.18% APR. - DeFi rates float with supply-demand. Lower LTVs and larger loans usually price better. - Factor origination, prepayment, and liquidation fees—these can push your realized APR well above the headline.

How to set one up 1) Choose a provider: compare custody architecture, rehypothecation policy, geography, and pricing. 2) Complete KYC for CeFi (DeFi typically uses wallet-based access). 3) Select LTV and term: conservative LTV widens your liquidation cushion. 4) Post collateral: to a custodian, a multisig vault, or a smart contract (wrapped BTC for most DeFi). 5) Receive funds in fiat or stablecoins; monitor LTV and repay to release BTC.

Regulation, resilience, and the road ahead Policy clarity has improved. In the U.S., the GENIUS Act passed, and the administration has been comparatively crypto-friendly, while the broader CLARITY Act stalled in the Senate in September 2026. SVB noted several major financial institutions launched BTC-backed lending for select clients in H1 2026. Expect deeper bank participation, more rated securitizations like Ledn’s, and new consumer products—credit cards and longer-term loans among them.

Still, the core risk hasn’t moved: a sharp BTC drawdown can force liquidations for borrowers running tight LTVs. DeFi adds technical risk; in April 2026, after infrastructure tied to the Kelp DAO project was exploited for $291 million, users on Aave faced withdrawal frictions as roughly $6.2 billion exited. Borrowers who treat LTV as a stop-loss, pick custody models they can explain in a sentence, and avoid opaque rehypothecation policies tend to sleep better when volatility hits.