Interest rate terminology can be genuinely confusing, particularly the distinction between APR and APY, two commonly used but frequently misunderstood terms that apply somewhat differently depending on whether you are borrowing or saving money.
What APR Represents
Annual percentage rate, or APR, represents the yearly cost of borrowing, including both the base interest rate and certain additional fees, expressed as a single percentage. APR is primarily used for loans and credit products, and it provides a more complete picture of borrowing costs than the base interest rate alone.
What APY Represents
Annual percentage yield, or APY, is primarily used for savings products and reflects the actual return you earn on deposited money over a year, including the effect of compound interest. Unlike APR, APY accounts for how frequently interest compounds, which can meaningfully affect your actual earnings over time.
Why the Compounding Difference Matters
Because APY factors in compounding while a simple stated interest rate does not, two savings accounts with the same nominal interest rate but different compounding frequencies can produce meaningfully different actual returns, with more frequent compounding generally producing a higher effective yield.
Using These Terms When Comparing Products
When comparing loan offers, focusing on APR rather than the base interest rate alone provides a more accurate comparison, since it captures additional fees. When comparing savings or investment accounts, focusing on APY provides a more accurate picture of actual expected returns than a simple stated interest rate.
