APY Calculator

The interest rate is the nominal percentage your bank pays on your balance. APY factors in how often that interest compounds within the year. A 4.5% interest rate compounded monthly produces a 4.59% APY — meaning you actually earn 4.59% over the year, not just 4.5%.

More frequent compounding increases APY because earned interest starts generating its own returns sooner. Daily compounding earns slightly more than monthly, which earns more than quarterly. The difference grows with higher rates and longer time periods.

APY on savings accounts is typically variable — banks can change rates at any time based on market conditions and Federal Reserve actions. CD APYs are fixed for the term length, giving you a guaranteed rate until maturity.

As of 2024-2025, high-yield savings accounts offer 4.00–5.25% APY at online banks. Traditional branch banks often offer 0.01–0.10%. Anything above 4% is competitive. Always check if high APYs come with balance requirements or time limitations.

Banks calculate interest on your daily balance, then compound it according to their schedule. If your account compounds daily with a 4.5% rate, the daily rate is 4.5%/365 = 0.01233%. This is applied to your balance each day, including previously earned interest.

Some high-yield checking accounts offer APY, though usually lower than savings accounts or only on balances up to a certain limit. Standard checking accounts typically earn 0% APY. Interest-bearing checking is less common but growing through fintech banks.