Stablecoin Loans at 0% APR: The LTV and Repayment Mechanics That Define Risk

The headline 0% APR is a conditional promise, not a free pass. It is granted only when borrowers maintain a highly conservative Loan-to-Value (LTV) ratio. The most common path to zero interest requires keeping LTV well below 30%, with some structures targeting levels as low as 20% to ensure safety and control. This is the core trade-off: minimal cost for maximum collateral buffer.

This model has scaled significantly in the centralized finance (CeFi) world. Nexo's recently launched Zero-interest Credit facility has already facilitated over $140 million in liquidity for Bitcoin and Ethereum holders. The product is designed for predictable, long-term borrowing without liquidation risk, but its 0% rate is built on a foundation of strict collateral discipline.

The decentralized (DeFi) approach reveals a contrasting reality. Sovryn's Zero protocol offers 0% interest loans, but it requires a minimum 110% collateral ratio. This high ratio is functionally a high LTV condition, meaning borrowers must lock up more collateral than they borrow. It is a non-custodial, permissionless structure, but the requirement itself defines the risk and cost parameters.

Repayment Structures and the LTV Risk Threshold

The repayment mechanics define the core risk. Nexo's Zero-interest Credit offers a fixed-term, zero-interest product with a predefined repayment path that is visible from day one. This structure is built for predictability, with a set end date and built-in safeguards against mid-term liquidation. In contrast, Sovryn's Zero protocol operates on an indefinite repayment model, where there is no payback period and borrowers choose when to repay. The absence of a set term shifts the risk entirely to the borrower's discipline and market timing.

The primary repayment risk for both models is liquidation if collateral value drops. While Nexo's product is designed to be free from the risk of premature forced liquidation, this protection is conditional on maintaining the required LTV. For any loan, a sharp decline in the collateral's price can breach the liquidation threshold before repayment is due. This is the fundamental vulnerability in leveraged crypto borrowing.

A concrete example illustrates the sensitivity. For a loan with a 30% LTV, a 10% drop in the collateral's price could push the LTV above the liquidation threshold, triggering a forced sale. The required buffer is small, highlighting how quickly risk can escalate. This dynamic underscores that the 0% APR is a function of a high collateral ratio, not a reduction in the underlying market risk.

Capital Flow and Market Context

The CeFi lending market is the dominant capital engine, accounting for 60%-70% of crypto loans. This segment has matured into a regulated financial service, with platforms now operating under clear licensing and custody rules. This shift toward compliance has established a new norm: predictable pricing and transparent LTV requirements are now expected, moving the market away from the opaque models of earlier cycles.

Against this backdrop, the 0% APR offer is a premium, conditional product. The competitive benchmark for regulated Bitcoin loans is now starting around 9-10% APR. A zero-interest facility is therefore not a market-rate product but a strategic one, granted only for the highest collateral buffers. It functions as a loyalty or risk-control tool, not a standard borrowing option.

The relative attractiveness of this zero-cost capital hinges on the yield available elsewhere. The primary alternative is stablecoin lending, where yields currently range from 2% to 16% APY. If these yields fall, the opportunity cost of holding stablecoins for a 0% loan increases, making the conditional offer more compelling. Conversely, high stablecoin yields would pressure CeFi lenders to offer more competitive rates to attract borrowers.