APY and APR measure interest, but they are not the same number and they are not used for the same products. APY — Annual Percentage Yield — is what you earn on money you deposit into an interest-bearing account like a high-yield savings account, certificate of deposit, or money market fund. It includes the effect of compound interest. APR — Annual Percentage Rate — is what you owe on money you borrow through a credit card, personal loan, auto loan, or mortgage. It includes the underlying interest rate plus most required fees but generally does not include compounding. Banks use these two different figures by design: APY makes deposit rates look slightly higher (which sells better in advertising), and APR is the federally required disclosure on consumer loans (which makes price comparison easier). As of April 2026, the best high-yield savings accounts advertise APYs around 4.00% to 4.20%, while typical credit card APRs run from 18% to 28% — a spread that quietly funds most consumer banking in the United States.
- APY is what you earn on deposits and includes compounding. APR is what you owe on loans and includes most fees.
- Same underlying rate, different numbers. A 12% APR compounded monthly equals a 12.68% APY. The difference is the compounding effect.
- More frequent compounding produces a higher APY. Daily compounding always beats monthly, which always beats quarterly, which always beats annual.
- Both disclosures are federally required. The Truth in Savings Act mandates APY on deposit accounts; the Truth in Lending Act mandates APR on consumer loans.
- Current benchmarks (April 2026): top HYSA APYs are 4.00%–4.20%, the national average traditional savings account is 0.39%, typical credit card APRs are 18%–28%, and the prime rate is 6.75%.
- What APY Measures (and Why Compounding Matters)
- What APR Measures (and Why Fees Are Included)
- The Conversion Formula Both Directions
- A Worked Example: Same 12% Rate, Three Different Numbers
- Where You’ll See APY (Deposits and Investments)
- Where You’ll See APR (Loans and Credit)
- Common Misconceptions and Traps
- Frequently Asked Questions
What APY Measures (and Why Compounding Matters)
APY tells you the actual percentage your money will grow over a full year in an interest-bearing account, assuming no deposits or withdrawals during that period. The reason it differs from the simple “interest rate” stated on an account is compounding — the effect of earning interest on interest already credited.
Consider a savings account paying a 4.00% interest rate that compounds daily. After day one you have a tiny amount of interest credited. On day two, your interest is calculated on the original principal plus that tiny day-one interest. By day three, it’s compounding on three days of accumulated interest. After 365 days, the total return ends up slightly higher than 4.00% because each day’s interest contributed to the next day’s calculation. The exact APY for a 4.00% rate compounded daily is 4.08%. That extra 0.08 of a percentage point is the compounding effect.
Compounding frequency makes a measurable difference. The same 4.00% nominal rate produces different APYs depending on how often the bank credits interest. Annual compounding produces a 4.00% APY (no compounding effect because the year is the period). Quarterly compounding lifts that to 4.06%. Monthly compounding lifts it to 4.07%. Daily compounding lifts it to 4.08%. The federal Truth in Savings Act requires deposit institutions to disclose APY using a standardized formula so two accounts can be compared on equal footing, regardless of whether one compounds monthly and the other daily. For current best-in-class deposit rates, see our best high-yield savings accounts page and the best CD rates roundup.
What APR Measures (and Why Fees Are Included)
APR tells you the annualized cost of borrowing money, expressed as a percentage of the loan principal. Crucially, APR includes the underlying interest rate plus most lender-charged fees that are required to obtain the loan — origination fees, mortgage discount points, certain processing fees, broker compensation, and so on. The Truth in Lending Act, enforced through Federal Reserve Regulation Z, mandates that consumer lenders quote APR on credit cards, mortgages, auto loans, personal loans, and home equity products so borrowers can compare offers on a like-for-like basis.
The reason fees are folded into APR is that two loans can quote the same interest rate but have very different total costs. Consider two 30-year mortgages, both at 6.50%. Loan A charges no origination fee. Loan B charges a 1.5% origination fee on a $400,000 mortgage — that’s $6,000 added to closing costs. Loan A’s APR ends up around 6.55% (a tiny upward adjustment for required mortgage insurance and standard fees). Loan B’s APR comes in around 6.85% because the $6,000 origination fee gets amortized into the rate disclosure. Same 6.50% interest rate; very different APRs. APR is the apples-to-apples comparison number, which is exactly why the federal disclosure rule exists.
APR has limits as a comparison tool. It assumes you’ll hold the loan for its full original term — relevant for a 30-year mortgage you keep for 30 years, less relevant if you plan to refinance or sell within five to seven years. On a short-tenure loan, the upfront fees that boost the APR get spread over a much shorter time period than the disclosure assumes, making the effective cost higher than the quoted APR suggests. Ask your loan officer for the “five-year cost” or “break-even point on points” alongside the APR — that’s a more useful number if you don’t expect to keep the loan to maturity.
The Conversion Formula Both Directions
Converting between APR and APY uses one core formula. Given a stated nominal rate (call it r) and a number of compounding periods per year (call it n), the APY is:
APY = (1 + r/n)^n − 1
For a 12.00% nominal annual rate compounded monthly (n = 12), the APY equals (1 + 0.12/12)^12 − 1 = (1.01)^12 − 1 = 0.1268, or 12.68%. The same 12% nominal rate compounded daily (n = 365) produces (1 + 0.12/365)^365 − 1 = 0.1275, or 12.75%. Compounded annually (n = 1), it produces exactly 12.00% — no compounding effect over a single period.
Going the other direction — from APY back to the underlying nominal rate — solve the same formula for r: r = n × ((1 + APY)^(1/n) − 1). A 4.07% APY compounded monthly equals a nominal rate of 12 × ((1.0407)^(1/12) − 1) = 4.00% nominal. The same 4.07% APY compounded daily equals a nominal rate of approximately 3.99% — a tiny difference, but it’s there.
Two practical corollaries. First, when comparing two products with the same APY but different compounding frequencies, pick the one with daily compounding if available, because over partial-year periods (which is most of how you’ll actually use it) the daily compounder credits earlier. Second, never compare a stated nominal rate on one product to an APY on another — you’re comparing apples to oranges. Convert both to APY, or convert both to nominal, before deciding.
A Worked Example: Same 12% Rate, Three Different Numbers
Imagine three financial products all referencing a 12.00% annual rate, but quoted differently:
- Product 1: Credit card. Quoted as “12.00% APR.” Compounding doesn’t show up in the disclosure (TILA requires nominal APR, not APY). Daily periodic rate is 12.00% / 365 = 0.0329%, applied to your average daily balance. The effective annualized cost if you carry a balance the whole year is 12.75% (the APY equivalent of 12% compounded daily) — but that’s not what the credit card statement shows.
- Product 2: Personal loan. Quoted as “12.00% APR including a 2% origination fee.” The 2% origination fee on a $10,000 loan adds $200 to the total cost. The “interest rate” alone might be 9.50%, but APR rolls in the origination charge. The APR you’d shop on is the 12.00% figure.
- Product 3: Hypothetical savings vehicle. Quoted as “12.00% APY.” Compounded daily, this requires an underlying nominal rate of 11.32%. The APY is the higher number because it includes compounding within the year.
Same headline 12.00% on all three products, three completely different things. The credit card’s “12% APR” understates its effective annual cost; the loan’s “12% APR” inflates the interest rate to capture fees; the savings vehicle’s “12% APY” inflates the nominal rate to include compounding. This is why the headline number alone is never enough — you have to know which unit it is and what compounds when. To put specific numbers to your own loan or deposit balance, our APR calculator shows the relationship between rate, fees, and effective cost. For more on how interest-rate units come up in everyday finance, our basis points explainer covers the units used to discuss small changes in either APR or APY.
Where You’ll See APY (Deposits and Investments)
APY appears wherever a financial institution wants to advertise what your money will earn. Three product categories use it almost exclusively.
High-yield savings accounts. The current best-in-class HYSA APYs as of April 2026 are 4.00% to 4.20%, with online banks like Newtek, CIT, Wealthfront, and Varo offering rates near the top of that range. Most HYSAs compound daily, so the APY shown is very close to the underlying nominal rate plus a small compounding bonus.
Certificates of deposit (CDs). CDs lock a fixed APY for a defined term — common terms are 3 months, 6 months, 1 year, 18 months, 2 years, and 5 years. Currently, top 12-month CD APYs sit around 4.20%–4.50%, with longer-term CDs slightly lower (the yield curve has been flattening). The APY on a CD is contractually guaranteed for the full term — unlike an HYSA where the APY can move with the federal funds rate at any time.
Money market accounts and money market funds. Both quote APY for comparison consistency. Money market accounts at banks typically pay slightly less than top HYSAs but offer check-writing privileges. Money market funds at brokerages pay close to the federal funds rate (currently 3.50%–3.75% target range) and are not FDIC-insured.
When comparing two HYSAs, always look at the APY rather than the nominal interest rate, but also check three things in the fine print. First, is the rate promotional or ongoing? A 5.00% APY for the first 90 days followed by 3.50% thereafter is a very different product from a flat 4.20%. Second, are there balance tiers? Some accounts pay the headline APY only on balances up to a stated cap and a much lower rate above it. Third, are there fees that effectively reduce your APY? A $5 monthly maintenance fee on a $5,000 balance silently subtracts 1.20 percentage points per year from your effective APY. The advertised number means nothing if the conditions aren’t satisfied.
Where You’ll See APR (Loans and Credit)
APR appears on every consumer credit product covered by the Truth in Lending Act. Five places matter most for everyday borrowers.
Credit cards. Quoted as “purchase APR,” “balance transfer APR,” and “cash advance APR” — sometimes three different rates on the same card. Typical purchase APRs as of April 2026 run 18% to 28%, with cash advance APRs commonly 25% to 30%. Credit card APRs move with the prime rate, which sits at 6.75% currently. When the Fed cuts, your card’s APR usually drops within one or two billing cycles.
Mortgages. 30-year fixed mortgage APRs as of mid-April 2026 average around 6.10%–6.30% (the underlying interest rate is roughly 6.00%, with the difference reflecting required closing costs amortized over the loan). Adjustable-rate mortgages (ARMs) quote both an introductory APR and a “fully indexed” APR that the rate will eventually adjust to.
Auto loans. APR ranges widely by credit profile and loan term. New car APRs for prime-credit borrowers run 5% to 7%; used car APRs run 7% to 10%; subprime borrowers can see APRs of 15% or higher. Auto loan APRs typically include the dealer’s lender markup, which is one reason getting pre-approved by a credit union before stepping onto a dealer lot saves money.
Personal loans. APR ranges from around 7% for excellent credit to 36% for high-risk borrowers. Personal loan APR always includes the origination fee (typically 1% to 8% of loan amount) folded into the rate disclosure. For how to compare personal loan offers using APR correctly, see our personal loan calculator.
HELOCs and home equity loans. HELOC APRs are typically quoted as “prime + margin” — for example, “prime + 1.50% APR.” With prime at 6.75% and a 1.50% margin, the effective HELOC APR is 8.25%. The APR moves with prime as the Fed adjusts rates. For the precise relationship between Fed decisions, the prime rate, and your variable-rate APR, see how Fed rate decisions affect your loans and the current prime rate page.
Common Misconceptions and Traps
Five errors show up repeatedly when borrowers and savers try to compare products.
Comparing a credit card APR to a savings APY. The headline numbers are not comparable directly because compounding is built into APY but not APR. A 22% credit card APR with daily compounding has an effective annualized cost of about 24.6% if you carry a balance year-round — that’s the proper APY-equivalent comparison number. A 4.00% HYSA APY is already the compounding-included number. Always normalize to the same unit before comparing.
Treating “interest rate” and “APR” as identical. They aren’t. The interest rate is the cost of the borrowed money itself; the APR adds in required fees that boost the effective cost. On a no-fee credit card the interest rate and APR are essentially identical. On a mortgage with origination fees, points, and other closing costs, the APR is materially higher than the interest rate.
Ignoring promotional vs. ongoing APYs. The 5.00% APY some HYSAs advertise often applies only to the first 90 or 180 days and only on balances under a cap. After the promo period the rate drops to a normal APY of 3.00% to 4.00%. Always read the duration and cap.
Forgetting that APR doesn’t include all costs. Even though APR includes most required fees, certain charges escape the disclosure — title insurance, recording fees, attorney costs, prepaid escrow for taxes and insurance. The federally-required Loan Estimate document lists these separately. APR is more comparable across lenders than the interest rate alone, but it still does not capture every dollar of closing cost.
Believing higher APY is always better. Almost always yes — but check tradeoffs. A high-APY account that requires you to lock funds for 5 years (a CD) is not better than a slightly lower-APY HYSA if you might need the money in 6 months and would pay an early-withdrawal penalty. Match the product structure to your actual cash-flow needs. Variable HYSA rates also move with the federal funds rate. The Fed rate forecast for 2026 walks through where short-term rates are likely headed, which directly affects what your HYSA will pay over the next twelve months.
Frequently Asked Questions
What is APY?
APY stands for Annual Percentage Yield. It’s the actual percentage your money will grow over a full year in an interest-bearing account, assuming no deposits or withdrawals during that period. APY includes the effect of compound interest — earning interest on interest already credited. It’s the standardized disclosure used on savings accounts, certificates of deposit, money market accounts, and money market funds, mandated by the federal Truth in Savings Act so that two deposit products can be compared on equal footing.
What is APR?
APR stands for Annual Percentage Rate. It’s the annualized cost of borrowing money, expressed as a percentage of the loan principal. APR includes the underlying interest rate plus most lender-charged fees that are required to obtain the loan — origination fees, mortgage discount points, broker compensation, and similar charges. The Truth in Lending Act, enforced through Federal Reserve Regulation Z, requires consumer lenders to quote APR on credit cards, mortgages, auto loans, personal loans, and HELOCs.
Which is better: APR or APY?
Neither is “better” — they measure different things and apply to different products. You want a high APY when saving (more interest earned) and a low APR when borrowing (less interest paid). Comparing one to the other directly is a category error. If you ever need to compare a savings rate to a borrowing rate — for example, to decide whether to pay down a credit card balance versus add to savings — convert both to the same unit (typically APY) before doing the math. A 22% APR credit card carrying a balance year-round costs about 24.6% APY-equivalent, so even a 5% HYSA loses to paying that card down.
How do I convert APR to APY?
Use the formula: APY = (1 + r/n)^n − 1, where r is the nominal annual rate and n is the number of compounding periods per year. For a 12.00% APR compounded monthly (n = 12), APY = (1 + 0.12/12)^12 − 1 = 12.68%. For the same 12.00% APR compounded daily (n = 365), APY = (1 + 0.12/365)^365 − 1 = 12.75%. Annual compounding (n = 1) produces APY = APR exactly. The more frequent the compounding, the higher the resulting APY.
Do credit cards use APR or APY?
Credit cards use APR, as required by the federal Truth in Lending Act. The APR shown on your statement does not include the effect of compounding. If you carry a balance year-round, the actual cost is the daily-compounded equivalent, which is slightly higher than the headline APR. For example, a 22% APR card has an APY-equivalent annual cost of about 24.6% if compounded daily and you carry the full balance. Banks display APR rather than APY on cards because TILA requires it; the convention is consistent across all U.S. credit card issuers.
Does APR include compound interest?
No. APR is a nominal annualized rate that does not account for the compounding effect within the year. APY is the metric that does. This is why the same underlying rate produces a higher number when expressed as APY (compounded) than as APR (not compounded). On a borrowing product like a credit card, the difference matters if you carry balances — your actual cost is closer to the APY-equivalent than the disclosed APR. On a deposit product like an HYSA or CD, the disclosed APY already includes compounding by definition.
Is a higher APY always better?
Almost always — but check three tradeoffs. First, liquidity: a 5-year CD might offer a higher APY than an HYSA, but if you need the money before maturity, the early-withdrawal penalty can wipe out the rate advantage. Second, conditions: a high promotional APY might apply only to the first 90 days or only on balances under a cap. Third, fees: monthly maintenance fees, transaction fees, or minimum-balance penalties can quietly reduce your effective APY below the headline number. The APY is only as good as the conditions attached to it.
Next Steps: Comparing Real Products Side by Side
The simplest test: pick the product type you actually use most (credit card, HYSA, or both), pull up its current rate disclosure, and identify which unit is being shown. Then compare it to one alternative product in the same category using the same unit. If the units don’t match, convert before deciding. The 30 seconds of math separates the headline from the actual cost or yield.
For live deposit benchmarks, the best high-yield savings accounts page tracks current top APYs daily, and the best CD rates page does the same for fixed-term deposits. For variable-rate borrowing benchmarks, see the current prime rate and the U.S. interest rates dashboard. For the macro context driving both sides — what the Fed is doing and what the bond market expects — the Fed dot plot guide and yield curve explainer connect the dots.
References
- Consumer Financial Protection Bureau. “What is the difference between a fixed APR and a variable APR?” consumerfinance.gov
- Board of Governors of the Federal Reserve System. “Truth in Lending Act (Regulation Z).” federalreserve.gov
- Federal Deposit Insurance Corporation. “Truth in Savings Act and Regulation DD.” fdic.gov
- Consumer Financial Protection Bureau. “What is the difference between APR and APY?” consumerfinance.gov
- Federal Reserve Bank of St. Louis (FRED). “National Rate on Non-Jumbo Deposits (Savings).” fred.stlouisfed.org
- Board of Governors of the Federal Reserve System. “H.15 Selected Interest Rates.” federalreserve.gov
Keep Reading
- Current U.S. Prime Rate Today
- Best High-Yield Savings Accounts
- Best CD Rates Today
- APR vs Interest Rate Calculator
- How Fed Rate Decisions Affect Your Loans
- How to Read the Fed Dot Plot
- Yield Curve Inversion Explained
- What Is SOFR? The Rate That Replaced LIBOR
- Basis Points Explained
- Timing Your Mortgage Rate Lock Around Fed Meetings
