How to Calculate Interest Rate per Month on Savings Account

Calculating the monthly interest rate on a savings account is essential for understanding how your money grows over time. This guide explains the process step-by-step, including how to use our interactive calculator to get accurate results quickly.

What is Monthly Interest Rate?

The monthly interest rate is the amount of interest you earn on your savings account balance each month. It's calculated based on the annual percentage yield (APY) or annual percentage rate (APR) offered by the bank, adjusted for the number of compounding periods in a year.

Most savings accounts compound interest monthly, meaning your interest is calculated and added to your balance each month. The monthly interest rate is simply the annual rate divided by 12.

How to Calculate Monthly Interest Rate

To calculate the monthly interest rate, follow these steps:

Find the annual interest rate offered by your savings account (APY or APR).
Divide the annual rate by 12 to get the monthly rate.
Multiply the monthly rate by your account balance to find the monthly interest earned.

Our calculator automates this process, providing you with the monthly interest rate and monthly interest earned based on your inputs.

The Formula

Monthly Interest Rate = (Annual Interest Rate / 12) / 100

Monthly Interest Earned = Account Balance × Monthly Interest Rate

The first formula converts the annual percentage rate to a monthly decimal. The second formula calculates the actual interest earned each month based on your account balance.

Worked Example

Let's say you have a savings account with an annual interest rate of 2.5% and a balance of $1,000.

Monthly interest rate = (2.5 / 12) / 100 = 0.002083 (or 0.2083%)
Monthly interest earned = $1,000 × 0.002083 = $2.08

Over one year, you would earn $25.00 in interest ($2.08 × 12).

FAQ

What's the difference between APR and APY?: APR is the annual percentage rate, while APY is the annual percentage yield, which includes compounding interest. APY is generally higher than APR.
How often is interest calculated on savings accounts?: Most savings accounts calculate and add interest monthly. Some may offer daily or quarterly compounding, but monthly is the most common.
Can I earn interest on a savings account with a small balance?: Yes, even small balances can earn interest. The amount of interest earned depends on the account balance and the annual interest rate.
Is the interest rate on savings accounts fixed or variable?: Most savings accounts offer fixed interest rates, but some may have variable rates that change based on market conditions.
How do I find the best savings account interest rate?: Compare interest rates from different banks and financial institutions. Look for accounts that offer high yields and good customer service.