APY (Annual Percentage Yield) is the real annual return on a deposit account after compounding is factored in. The national average savings account APY is 0.46% in 2026, but high-yield savings accounts at online banks pay 4.50%–5.10% APY — more than ten times as much. Choosing the right APY can mean hundreds or thousands of extra dollars per year.
What Is APY?
APY stands for Annual Percentage Yield. It tells you exactly how much interest you will earn on a deposit account over one full year, expressed as a percentage of your balance.
Unlike a simple nominal rate, APY accounts for compounding — earning interest on top of previously earned interest. This makes APY the most accurate single number for comparing savings accounts, CDs, and money market accounts.
The Truth in Savings Act (Regulation DD) requires banks and credit unions to disclose APY clearly on all deposit accounts so consumers can make apples-to-apples comparisons.
APY Formula
$$\text{APY} = \left(1 + \frac{r}{n}\right)^n - 1$$
Where:
- r = nominal annual interest rate (as a decimal, e.g., 5% = 0.05)
- n = number of compounding periods per year
Common compounding frequencies:
| Compounding | Periods per Year (n) |
|---|---|
| Daily | 365 |
| Monthly | 12 |
| Quarterly | 4 |
| Annually | 1 |
Most high-yield savings accounts compound daily, which produces the highest APY for a given nominal rate.
Worked Example: How APY Grows Your Money
Say you deposit $10,000 in a savings account advertised at a 5.00% nominal rate with daily compounding.
$$\text{APY} = \left(1 + \frac{0.05}{365}\right)^{365} - 1 = 5.127%$$
At the end of one year you would have:
$$$10{,}000 \times (1 + 0.05127) = $10{,}512.70$$
Compare that to the national average of 0.46% APY:
$$$10{,}000 \times (1 + 0.0046) = $10{,}046.00$$
The difference: $466.70 in the first year alone. Over five years with daily compounding, that $10,000 grows to $12,839 at 5.00% APY versus $10,232 at 0.46% APY — a gap of $2,607.
APY vs. APR: Key Difference
| APY | APR | |
|---|---|---|
| Stands for | Annual Percentage Yield | Annual Percentage Rate |
| Includes compounding? | Yes | No |
| Used for | Deposit accounts (savings, CDs, MMAs) | Loan products (mortgages, credit cards, auto) |
| You want it | Higher (earning more) | Lower (paying less) |
For a deeper comparison, see APY vs. APR — What’s the Difference and APY vs. Interest Rate.
Current APY Benchmarks (May 2026)
| Account Type | Low End (Traditional Banks) | High End (Online Banks) |
|---|---|---|
| Savings account | 0.01%–0.50% | 4.50%–5.10% |
| Money market account | 0.05%–0.60% | 4.40%–5.00% |
| 6-month CD | 0.10%–1.00% | 4.75%–5.25% |
| 1-year CD | 0.10%–1.50% | 4.50%–5.50% |
| 5-year CD | 0.25%–2.00% | 3.75%–4.50% |
The wide gap between traditional and online banks exists because online banks have lower overhead costs and compete aggressively for deposits. Understanding how the Federal Reserve affects savings rates explains why these numbers move over time.
What Affects APY?
Federal Reserve rate decisions are the biggest driver. When the Fed raises the federal funds rate, online banks typically raise HYSA APYs within 1–2 weeks. When the Fed cuts rates, APYs fall — sometimes before the official announcement.
Promotional vs. ongoing APY: Some banks advertise a higher introductory APY for the first few months. Always check the ongoing rate before opening.
Minimum balance requirements: Some accounts only pay the advertised APY on balances above a threshold (e.g., $25,000+). Read the fine print.
How to Get the Highest APY
- Use a high-yield savings account (HYSA) at an online bank — these consistently offer 10–20× the national average.
- Compare CD rates if you can lock funds away — current CD rates often exceed HYSA rates for terms of 6–18 months.
- Check money market accounts — some offer HYSA-comparable APYs with check-writing features.
- Avoid savings accounts at traditional big banks unless you have another reason (branch access, relationship banking) — the rate trade-off is significant.
- Review your rate quarterly — unlike CDs, HYSA rates are variable and can be cut at any time.
For the complete picture on rates, deposits, and how the Fed affects your money, visit the Interest Rates & Federal Reserve hub.
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