A certificate of deposit (CD) is one of the most straightforward savings tools available: you deposit a lump sum at a bank or credit union, agree to leave it untouched for a set period — the term — and in return the institution pays you a fixed interest rate. When the term ends, you get your original deposit back plus the interest earned. Simple in theory; a little nuanced in practice, especially when you're trying to compare CD rates across dozens of institutions.

APY vs. interest rate: the number that actually matters

Every CD advertisement will show you at least one of two figures: the nominal interest rate (sometimes called the coupon rate) and the Annual Percentage Yield, or APY. These are related but not the same, and the difference matters.

Nominal rate
The base interest rate the bank applies to your balance before compounding is factored in.
APY (Annual Percentage Yield)
The effective annual return after compounding is included. Required by law to be disclosed on CD advertisements in the United States.
Compounding frequency
How often interest is calculated and added to your balance — daily, monthly, or quarterly. More frequent compounding produces a slightly higher APY for the same nominal rate.

When you're comparing CD rates, always compare APYs — not nominal rates. An institution offering a 4.90% nominal rate compounded daily will actually deliver a higher return than one advertising the same 4.90% rate compounded quarterly. The APY standardizes that difference so you're comparing apples to apples.

Federal law (the Truth in Savings Act) requires banks and credit unions to disclose APY on all deposit account advertisements. If you see only a nominal rate, ask for the APY before committing.

How CD terms affect the rates you'll see

CD rates aren't one-size-fits-all. They vary significantly by term length — how long you agree to lock up your money. Terms typically range from one month to five years or longer, and the relationship between term and rate isn't always what you'd expect.

In a normal interest-rate environment, longer terms pay more because you're compensating the bank for the certainty of having your money available longer. But in periods when short-term rates are elevated — as they have been through much of 2025 and into 2026 — the yield curve can be flat or even inverted, meaning short-term CDs (3 months to 1 year) pay as much as or more than longer ones. Understanding where rates sit today matters a great deal when choosing a term.

  • Short-term CDs (3–12 months): best for money you may need relatively soon, or when you expect rates to rise further and want to reinvest at higher levels.
  • Medium-term CDs (1–3 years): balance between commitment and return; popular for money earmarked for a specific goal like a down payment.
  • Long-term CDs (4–5 years): appropriate when rates are high and you want to lock in a favorable return before they fall.
  • Jumbo CDs: typically require a minimum deposit of $100,000; some institutions offer a slightly higher APY in exchange for the larger commitment.

What actually drives CD rates — and why they vary by institution

CD rates are influenced primarily by the federal funds rate set by the Federal Reserve. When the Fed raises rates to cool inflation, deposit rates at banks and credit unions tend to rise. When the Fed cuts rates, CD rates typically follow — though there is usually a lag, and the effect is uneven across institutions.

Crucially, not all institutions pass rate changes on to savers at the same speed or magnitude. Large national banks with massive, stable deposit bases often have less incentive to compete aggressively on rates. Online banks and credit unions, which frequently have lower overhead costs and a greater need to attract deposits, tend to offer more competitive CD rates. This is why the highest CD rates in the country are almost never found at the biggest brick-and-mortar banks.

Local banks and credit unions can also be competitive, particularly for members or residents of a specific community — which is why searching for "CD rates near me" alongside national comparisons is a smart strategy rather than an either-or choice.

FDIC and NCUA insurance: your rates are only as good as your coverage

Before you move money anywhere in pursuit of a higher APY, confirm that the institution is federally insured. Banks are insured by the FDIC (Federal Deposit Insurance Corporation); credit unions are insured by the NCUA (National Credit Union Administration). Both provide coverage up to $250,000 per depositor, per institution, per ownership category. Insurance is provided by those federal agencies — not by any third-party comparison platform.

If you have more than $250,000 to deposit at a single institution, you'll want to think carefully about ownership categories (individual, joint, retirement) or consider spreading funds across multiple institutions. For a detailed breakdown, see our guide to FDIC and NCUA insurance limits.

Early withdrawal penalties: the hidden cost of the wrong term

A high APY becomes less attractive if you end up needing your money before the term ends. Almost every traditional CD charges an early withdrawal penalty — commonly expressed as a certain number of days of interest. A typical penalty on a 1-year CD might be 90–180 days of interest; on a 5-year CD, it can be 150–365 days or more.

If flexibility is a concern, look into no-penalty CDs, which let you withdraw your full balance without a fee after a short initial holding period (often 6–7 days). The trade-off is usually a slightly lower APY. Whether that trade-off makes sense depends on your cash-flow needs.

Matching your CD term to the date you'll realistically need the money is just as important as finding the highest rate. A 5-year CD at 4.8% APY could cost you more than a 1-year CD at 4.5% APY if you break it early.

How to compare CD rates effectively

  1. Always compare APY, not nominal rate. It's the only figure that accounts for compounding.
  2. Narrow by term first. Decide how long you can genuinely commit before sorting by rate.
  3. Check the minimum deposit requirement. Some of the highest CD rates require $1,000, $10,000, or more.
  4. Verify FDIC or NCUA membership at the institution before depositing.
  5. Read the early withdrawal penalty disclosed in the account agreement — not just the marketing page.
  6. Confirm the rate directly with the institution. Published rates change frequently; what you see on a comparison tool is a snapshot, not a guarantee.

Because rates shift with Fed decisions, economic data releases, and individual bank funding needs, it's worth checking the most current figures before you act. Our live rate comparison tool pulls fresh data daily so you can see the current CD rates landscape in one place — and then confirm directly with any institution you're considering.

Ready to see today's numbers? Compare current CD rates across banks and credit unions at the Secure Returns compare tool: /preview/secure-returns/compare/ — then use the framework above to evaluate what you find.