APR vs APY Explained: The Two Rates That Decide What You Earn and Owe
APR measures what borrowing costs you. APY measures what saving pays you, compounding included. Learn the regulator definitions and how to use each rate.
By Galactic News Editorial · Published 2026-11-07T15:51:32+00:00 · Updated 2026-11-07T15:51:32+00:00
APR vs APY Explained: The Two Rates That Decide What You Earn and Owe
APR and APY look like twins, but they point in opposite directions. APR describes the cost of borrowing money. APY describes what a deposit account can earn you. The apr vs apy difference comes down to one idea: compounding. APY includes it. APR, as a borrowing measure, focuses on interest plus certain fees. This article explains both rates using U.S. regulator definitions. It is educational only and is not financial advice.
What APR means when you borrow
APR stands for annual percentage rate. For credit cards, the Consumer Financial Protection Bureau (CFPB) explains it simply. A card's interest rate is the price you pay for borrowing money. That price is usually stated as a yearly rate, called the APR. Pay your balance in full by the due date and you can often avoid interest on purchases.
On loans, APR can say more than the interest rate alone. The CFPB notes that a mortgage APR reflects the interest rate plus other charges. Those charges can include points, mortgage broker fees and other costs of getting the loan. For that reason, a mortgage APR is usually higher than its interest rate. When you compare loan offers, APR is the broader cost measure. The interest rate alone can flatter a loan with heavy fees.
What APY means when you save
APY stands for annual percentage yield. It applies to deposit accounts such as savings accounts and certificates of deposit. The CFPB's Regulation DD gives the formal definition. APY is a percentage rate reflecting the total interest paid on an account. It is based on the interest rate and the frequency of compounding, over a 365-day period.
The same regulation defines a deposit account's plain interest rate differently. That rate is the annual rate paid on an account, and it does not reflect compounding. So two accounts can share one interest rate yet show different APYs. The account that compounds more often will show the higher APY.
APR vs APY side by side
| Question | APR | APY |
|---|---|---|
| Full name | Annual percentage rate | Annual percentage yield |
| Where you see it | Credit cards, mortgages and other loans | Savings accounts, CDs and other deposit accounts |
| What it measures | The yearly cost of borrowing | The yearly yield on money you deposit |
| Fees included? | On many loans, yes; a mortgage APR includes points and other charges | No; it reflects interest and compounding only |
| Compounding included? | Not the focus of the measure | Yes, compounding frequency is built in |
| Who benefits from a higher number? | The lender; a higher APR costs you more | You; a higher APY earns you more, before fees and taxes |
A worked example of compounding
Compounding means earning interest on interest you already earned. Investor.gov, the SEC's investor education site, compares it to a snowball. The snowball picks up more snow with each rotation. Your balance works the same way when interest stays in the account.
Here is a purely hypothetical example. Imagine a deposit with a 5% annual interest rate, compounded monthly. The APY formula is (1 + 0.05 ÷ 12) raised to the 12th power, minus 1. That works out to about 5.12%. The extra 0.12 points are the compounding effect. Compounded only once a year, the same rate would show an APY of exactly 5%. This example illustrates the math only. It is not a rate offered by any bank.
How to use each rate
- Comparing loans? Compare APRs, not just interest rates, and check what fees each APR includes.
- Comparing savings accounts? Compare APYs, since they already reflect compounding.
- Reading a credit card offer? The APR tells you the yearly borrowing price if you carry a balance.
- Checking a CD? The APY assumes interest stays in the account until the term ends.
- Mind the gaps. APY does not include account fees, and a variable rate can change after you open the account.
Bottom line
APR is about what borrowing costs you. APY is about what saving pays you. APR folds in loan fees on many products. APY folds in compounding on deposit accounts. Use APR to compare credit offers. Use APY to compare deposit accounts. Never compare one product's APR with another product's APY. They answer different questions, and mixing them hides the true cost or return.