The dividend rate is the simple annual rate a credit union pays on your savings, without compounding. The APY (annual percentage yield) shows what you'd earn over a 365-day year once compounding is included, so it's equal to or higher than the dividend rate. Use the APY to compare accounts: under the NCUA's rules, the dividend rate can't be shown more prominently than the APY in an advert.
Credit unions use different words from banks because their members are owners. You don't earn interest on a credit union savings account, you earn dividends, and the headline figure has two versions. Here's what each one means under federal rules, why they differ, and how to compare a credit union account with a bank's.
The official definitions
Credit union savings disclosures are governed by the NCUA's Truth in Savings rule, 12 CFR Part 707. Its definitions section is short and precise:
| Term | What 12 CFR 707.2 says | In plain English |
|---|---|---|
| Dividend rate | The declared or prospective annual dividend rate paid on an account, which doesn't reflect compounding | The basic yearly rate, before dividends earn dividends |
| Annual percentage yield (APY) | A rate reflecting the total dividends paid, based on the dividend rate and how often dividends compound, for a 365-day period | What you'd really earn in a year, compounding included |
| Dividend period | The span of time set by the credit union's board by the end of which shares earn dividend credit | How often dividends are credited |
| Dividend declaration date | The date the board declares a dividend for the preceding dividend period | When the rate for the last period is confirmed |
The rule even says the dividend rate may also be called the annual percentage rate in account disclosures, which is one reason people mix the terms up.
Why the APY is higher: compounding
Compounding means dividends are added to your balance, then earn dividends themselves. The more often that happens, the more you earn at the same dividend rate. The regulation's own worked example shows it clearly:
| Same account, same 12% dividend rate | Dividends on $10,000 for a 365-day year | APY |
|---|---|---|
| Compounded monthly | $1,268.25 | 12.68% |
| Compounded quarterly | $1,255.09 | 12.55% |
Those figures come straight from Appendix A to Part 707 and use a high rate on purpose so the gap is easy to see; they're not today's market rates. The point holds at any rate: two credit unions offering the same dividend rate can disclose different APYs if they compound at different frequencies. That's why the APY, not the dividend rate, is the fair comparison.
The formula behind the APY
Appendix A sets one general formula: APY = 100 x ((1 + Dividends / Principal) raised to the power (365 / Days in term), minus 1). Principal is the amount assumed to be deposited at the start, Dividends is the total dividends earned on it over the term, and Days in term is the actual number of days. When the term is 365 days, or the account has no stated maturity, it simplifies to 100 x (Dividends / Principal).
Using the regulation's simpler example, if a credit union would pay $61.68 in dividends on $1,000 in a share draft account over a 365-day year, the APY is 6.17%.
The catch with credit union APYs
Here's what most savers don't realise. Credit union dividends are declared by the board for a period that has already passed, so the APY on an ordinary share account is partly a projection. Appendix A lets a credit union calculate the APY from either the rate at the last dividend declaration date or the rate it anticipates in future, as long as it tells members which method it uses.
The advertising rule in 12 CFR 707.8 backs this up: for dividend-bearing accounts other than term share certificates, an advert has to say the APY is accurate as of the last dividend declaration date. If rate changes are known or planned, the credit union may show a prospective APY instead of, or as well as, that figure. So read the small print to see which one you're looking at.
How adverts have to show the rates
- If an advert states a rate of return, it has to state it as an annual percentage yield, using that term at least once.
- No other rate is allowed, except the dividend rate, which can be shown alongside the APY but not more conspicuously.
- Variable-rate accounts must say the rate may change after the account is opened.
- Any minimum balance needed to earn the advertised APY has to be stated.
The same rule bans the word "profit" when describing dividends or interest. If an advert leads with a big dividend rate and hides the APY, that's a red flag.
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Comparing a credit union with a bank
Banks follow a matching rule, Regulation DD at 12 CFR Part 1030. It defines the interest rate as the annual rate that doesn't reflect compounding, and the APY in the same way as the credit union rule, based on the interest rate and compounding over 365 days. So a credit union's APY and a bank's APY are built on the same method, and you can compare them directly. Rates are only one part of the choice, so it's worth weighing up a credit union against a bank too.
| Credit union | Bank | |
|---|---|---|
| What you earn | Dividends | Interest |
| Simple rate | Dividend rate | Interest rate |
| Comparison figure | APY | APY |
| Rule | NCUA, 12 CFR Part 707 | Regulation DD, 12 CFR Part 1030 |
| Insurance | NCUA Share Insurance Fund, up to $250,000 for individual accounts | FDIC, at least $250,000 at each insured bank |
Insurance is the other half of the comparison. The NCUA says its Share Insurance Fund covers individual accounts at federally insured credit unions up to $250,000, as of October 2026, and is backed by the full faith and credit of the United States. The FDIC says deposits at each FDIC-insured bank are insured to at least $250,000. If you're weighing an app-only bank against a local credit union, our guide to whether online banks are safe covers what to check.
How to compare savings accounts, step by step
- Ignore the dividend rate or interest rate and find the APY for each account.
- Check whether the APY is variable, and whether it's as of the last declaration date or a prospective figure.
- Check the minimum balance needed to earn the advertised APY, and any balance tiers.
- Check fees, because a monthly fee can wipe out the difference between two APYs.
- Confirm the account is federally insured by the NCUA or the FDIC.
My advice
Always compare APY with APY. The dividend rate is useful for understanding how the account works, but it can't tell you what you'll earn in a year. And remember that compounding does its best work over long periods, which is why small gaps in APY add up. Our explainer on the power of compounding shows why time matters more than most people expect.
Frequently asked questions
What is the difference between dividend rate and APY?
The dividend rate is the simple annual rate a credit union pays, without compounding. The APY includes the effect of compounding over a 365-day year, so it's equal to or higher than the dividend rate.
Why is APY higher than the dividend rate?
Because dividends are added to your balance and then earn dividends themselves. The regulation's example shows a 12% dividend rate giving an APY of 12.68% compounded monthly and 12.55% compounded quarterly.
Should I compare credit unions by dividend rate or APY?
By APY. Two credit unions with the same dividend rate can show different APYs if they compound at different frequencies, and the APY is the figure banks use too.
Is a credit union APY guaranteed?
Not on ordinary share accounts. Dividends are declared by the board for a past period, and the APY is usually stated as accurate as of the last dividend declaration date or as a prospective figure, so it can change.
Is a credit union APY the same as a bank APY?
They're calculated the same way. Credit unions follow the NCUA's Truth in Savings rule and banks follow Regulation DD, and both define APY using the rate and compounding over 365 days.
