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# Interest Rates

We use a 2-stage interest rate model, where computation of the interest rate is separated into two stages.
Kinked Interest Rate Model Example
Before utilization reaches the kink level, interest rate is a linear interpolation between `r0` and `kink_rate`. After utilization goes above the kink level, interest rate is computed as a linear interpolation between `kink_rate` and `full_rate.`
The parameters, `r0`, `kink_rate`, `full_rate` and `kink` for various tokens are listed below:
Do note these numbers are tentative and applies only to testnet for now. Mainnet numbers may change.
 Token r0 kink rate full rate kink BTC 2% 20% 200% 0.85 ETH 2% 20% 200% 0.85 SOL 2% 20% 200% 0.85 mSOL 2% 20% 200% 0.85 RAY 2% 20% 200% 0.85 ORCA 2% 20% 200% 0.85 USDT 1% 8% 100% 0.85 USDC 1% 8% 100% 0.85 USTw 2% 20% 3000% 0.90