APY vs. APR: Two Rates That Mean Very Different Things

What Each Rate Actually Measures

At first glance, APY and APR look nearly identical — both are annual percentage figures attached to financial products. But they measure completely different things, and mixing them up can give you a distorted picture of how much you're earning or paying.

APY (Annual Percentage Yield) tells you how much interest you'll earn on a deposit over one year, after accounting for compounding. Compounding means that interest you earn gets added to your balance, and then that larger balance earns more interest. The more frequently compounding happens — daily, monthly, quarterly — the higher the APY relative to the base interest rate.

APR (Annual Percentage Rate) tells you the annual cost of borrowing money, expressed as a percentage. Unlike APY, APR does not factor in compounding. On loans and credit cards, it represents the interest rate plus certain fees spread over the life of the loan. Because it's standardized by federal law (the Truth in Lending Act), it's useful for comparing offers from different lenders.

A simple way to remember the difference: APY is what a bank pays you; APR is what a lender charges you. See our credit and debt glossary for plain-language definitions of other terms that appear in loan documents.

Why Compounding Makes APY Larger Than the Base Rate

If a savings account advertises a 5% interest rate compounded monthly, the APY will be slightly higher than 5% — because each month's interest is added to the principal before the next month's interest is calculated. Over a full year, those small additions stack up.

This is exactly why savings account providers advertise APY rather than the plain interest rate — it's the larger, more attractive number, and it's also the more accurate one. When you're comparing high-yield savings accounts to traditional savings accounts, APY is the right number to focus on.

For borrowers, the absence of compounding in APR can be misleading in a different direction. Credit card debt, for example, compounds monthly — meaning the actual cost of carrying a balance is higher than the APR alone suggests. The APR is a useful benchmark for comparison, but it underrepresents the real cost if you're only making minimum payments.

For a deeper look at how interest builds in deposit accounts, see how savings accounts actually earn you money.

Practical Rules for Using These Rates

The most important rule: never compare APY directly to APR. They're calculated differently and used for different products. Comparing them is like comparing a sale price to a sticker price — the numbers don't mean the same thing.

When evaluating savings products — bank accounts, certificates of deposit, money market accounts — look for the APY. It gives you the real annual return. When evaluating borrowing products — mortgages, auto loans, personal loans, credit cards — look at the APR. It gives you a standardized cost to compare across lenders.

One more thing worth knowing: on certain loan products, the APR can include origination fees, points, and other charges — meaning it may be higher than the base interest rate the lender quotes in advertisements. That's actually useful to borrowers because it surfaces hidden costs. If you're shopping for an auto loan, our article on auto loan terms that catch borrowers off guard explains how dealer markups on APR and other less-visible costs can affect what you ultimately pay.

This article is for general informational and educational purposes only and does not constitute personalized financial advice. Consult a qualified financial professional for guidance specific to your situation.