Utilization Rate in DeFi Lending: Meaning and Formula

Utilization rate is the share of a lending pool's deposits that is currently borrowed, calculated as total borrows divided by total supplied liquidity. In DeFi money markets it drives interest rates and decides whether lenders can withdraw on demand, so it is one of the first numbers to check before you supply or borrow.

Utilization rate definition

The formula is simple:

Utilization rate = total borrowed ÷ total supplied

Some protocols write the denominator as "cash + borrows" (available liquidity plus what is lent out), which comes to the same thing, sometimes minus reserves the protocol keeps for itself. A pool at 0% has nothing borrowed; a pool at 100% has lent out every token and has nothing left for withdrawals.

Utilization is measured per asset and per pool. In isolated and cross lending markets, the USDC pool and the ETH pool each have their own rate, and an isolated market for a risky token has its own figure separate from the main market.

How utilization rate works

1. Borrowers draw liquidity. Each new loan raises utilization; each repayment lowers it.
2. Rates follow utilization. Most money markets use an interest-rate model where the borrow APR rises as utilization rises, so scarce liquidity becomes more expensive.
3. The kink. Many models have an "optimal" utilization point, often somewhere around 80–90%. Below it, rates rise gently; above it, they rise steeply to push borrowers to repay and attract new lenders.
4. Lenders earn a share. Supply APR ≈ borrow APR × utilization × (1 − reserve factor), because only the borrowed part of the pool earns interest and the protocol keeps a cut.
5. Withdrawals need idle cash. A lender can only withdraw what is not lent out. At very high utilization, withdrawals can be delayed until borrowers repay or are liquidated.

Utilization rate example

Hypothetical: say a USDC pool has 10,000,000 USDC supplied and 7,000,000 USDC borrowed.

• Utilization = 7,000,000 ÷ 10,000,000 = 70%.
• Say the rate model sets a 6% borrow APR at that level and the reserve factor is 10%.
• Supply APR ≈ 6% × 0.70 × 0.90 = 3.78%.

Now say a large borrower takes another 2,500,000 USDC. Utilization jumps to 95%, above an assumed 90% kink, and the model might raise the borrow APR to 30%. Supply APR becomes about 30% × 0.95 × 0.90 ≈ 25.7%. That headline yield looks attractive, but only 500,000 USDC is left in the pool. If several lenders try to withdraw at once, most of them will have to wait.

Why utilization rate matters

• For lenders: high utilization means higher yield but weaker exit liquidity. A pool stuck near 100% is a warning sign, not just an opportunity.
• For borrowers: rates are variable. A loan opened at 70% utilization can become several times more expensive if the pool tightens, which matters when you hold a leveraged position for months.
• For protocol health: sudden utilization spikes often accompany depegs, exploits or bank-run behaviour. Liquidations, covered in our guide to DeFi loan liquidations, are one of the ways utilization comes back down.

When comparing lending markets, as in our list of Aave alternatives, look at utilization alongside APR and total liquidity, not APR alone.

Utilization rate on JewelSwap

JewelSwap's money markets on MultiversX offer isolated and global (cross) lending pools, each with its own utilization rate. At the time of writing (October 2026), new supply and borrowing on those markets are paused, so no new loans can push utilization up; it moves only as existing loans are repaid or liquidated and as lenders withdraw.

Related terms

• APY vs APR — simple versus compounded rates, and how lending yields are quoted.
• Cross margin vs isolated margin — sharing collateral across positions versus ring-fencing each one.
• Leverage — borrowing to increase position size, and the risks that come with it.
• Flash loan — an uncollateralised loan borrowed and repaid in one transaction.
• Price oracle — the price feed lending markets use to value collateral.

Learn more on the JewelSwap blog

• JewelSwap money markets: isolated and cross lending explained — how the two pool designs separate or share risk.
• Aave alternatives for DeFi lending — other lending protocols compared on design and risk.
• DeFi loan liquidations explained — what triggers a liquidation and how to avoid one.

Frequently asked questions

How do you calculate utilization rate in DeFi?

Divide the total amount borrowed from a pool by the total amount supplied to it. A pool with 7 million borrowed out of 10 million supplied has a 70% utilization rate.

Is a high utilization rate good or bad?

Both. High utilization means lenders earn more interest, but it also means less idle liquidity, so withdrawals can be delayed and borrow rates can spike. Very high utilization for a long time is a risk signal.

Utilization rate vs APR: what is the difference?

Utilization measures how much of a pool is borrowed. APR is the interest rate. In most lending protocols, the APR is calculated from the utilization rate through an interest-rate model.

JewelSwap Crypto Glossary · educational, not financial advice. Updated 2 October 2026. Browse the full glossary.