APR vs. APY: What Is the Difference?
While APR (Annual Percentage Rate) and APY (Annual Percentage Yield) sound almost identical, they measure compound interest from opposite perspectives. Understanding the difference prevents you from overpaying on debt or underestimating your savings growth.
Side-by-Side Comparison Table
| Metric | APR (Annual Percentage Rate) | APY (Annual Percentage Yield) |
|---|---|---|
| Primary Definition | Nominal interest rate + upfront fees | Effective annual rate including compound interest |
| Includes Compounding? | No (Simple rate basis) | Yes (Includes compounding effect) |
| Where It Is Used | Debt Products (Mortgages, Auto, Credit Cards) | Deposit Products (HYSA, CDs, Money Market) |
| Mathematical Formula | APR = Periodic Rate × Periods per Year | APY = (1 + Periodic Rate)^n − 1 |
| Consumer Impact | Quoted by lenders to make borrowing rates look lower | Quoted by banks to make savings yields look higher |
Interactive Compounding Calculator
Bottom Line: Which Should You Pick?
- When Borrowing Money (Mortgages, Loans): Focus on APR because it includes mandatory upfront lender origination fees and points.
- When Saving or Investing Money (HYSA, CDs): Focus on APY because it accurately reflects the actual money you will earn after compounding over 12 months.
Frequently Asked Questions
Why is APY higher than APR for the same rate?
APY includes the compounding effect of interest earning interest over a year. The more frequently interest compounds (monthly or daily), the higher the APY becomes relative to APR.
Do banks use APR for loans and APY for savings?
Yes! Financial institutions quote APR on debt products (mortgages, car loans, credit cards) because APR looks lower. Conversely, they quote APY on deposit accounts (savings, CDs) because APY looks higher.
How do you calculate APY from APR?
Use the formula APY = (1 + APR/n)^n − 1, where n is the number of compounding periods per year (e.g. n=12 for monthly compounding).
Which rate matters more when applying for a mortgage?
APR matters more when comparing mortgages because it includes mandatory upfront lender origination fees, points, and processing costs spread over the loan term.
Does daily compounding make a big difference in savings APY?
Daily compounding yields slightly more than monthly compounding. For example, a 5.00% rate compounded monthly yields a 5.116% APY, while daily compounding yields a 5.127% APY.