APR (Annual Percentage Rate)

Definition

APR tells you what percentage of your loan balance will cost you in interest over one year. It's the baseline borrowing rate that lenders advertise, but it doesn't include the full compounding effect that happens when interest adds up monthly. For credit cards and personal loans, APR is your key number for comparing offers side by side.

Why it matters

APR differences add real dollars to your payments. A credit card at 19% APR versus 28% APR will cost you dramatically more money over time if you carry a balance. Even a 2-3% difference on a mortgage can mean tens of thousands over 30 years. Understanding APR helps you prioritize paying off the highest-rate debt first, which saves the most money.

Quick example

If you carry a $5,000 balance on a card charging 19% APR, you'll pay roughly $950 in interest per year. Switch to a 28% card with the same balance, and that jumps to $1,400. That $450 difference is money you could spend elsewhere.

The bottom line

Knowing what APR (Annual Percentage Rate) means helps you make better day-to-day money decisions. It makes rates, account options, and tradeoffs easier to compare.