What is simple interest? Simple interest is calculated solely on the principal, which is the money you deposit into your ...

Compound interest is when the interest you earn on a balance in a savings or investing account is reinvested, earning you more interest. As a wise man once said, “Money makes money. And the ...

Most people only think of interest in terms of how high or low a rate is. But understanding how interest is calculated — or how it compounds — is important, too. Using our compound interest ...

An I bond is a savings bond issued by the US Department of the Treasury. Rates for I bonds issued between May 1, 2025, and October 31, 2025, have a rate of 3.98%.

Since March has 31 days, we can use the accrued interest formula to calculate your interest payable for the month. Accrued interest = 0.000438 × 31 × $3,000 = $40.77 Average daily balance ...