CD Calculator – Certificate of Deposit Interest & APY Calculator

How today's CD rates compare

The FDIC's national average rates next to the Treasury yield for the same term, as of August 31, 2026. Rates vary widely between banks, and the Treasury yield is a useful yardstick for any offer.

CD term	National average	Treasury yield	Interest on $10,000 at the average
3-month	1.13%	3.91%	$28
6-month	1.41%	3.99%	$70
12-month	1.73%	4.16%	$173
24-month	1.61%	4.34%	$325
36-month	1.36%	4.40%	$414
48-month*	1.28%	4.45%	$522
60-month	1.38%	4.49%	$710

Sources: FDIC national rates (deposits under $100,000) and Federal Reserve H.15; *average of the 3- and 5-year yields. Updated monthly in our CD Rate Gap Report.

How to Use the CD Calculator

A certificate of deposit (CD) is a savings product that pays a fixed interest rate for a set period of time. Use this calculator to project how much interest your CD will earn based on your deposit, rate, and term length.

Deposit Amount — the amount of money you are placing in the CD. Most CDs have minimum deposit requirements, typically $500 to $1,000, though some require $10,000 or more for the best rates.

Interest Rate (APY) — the annual percentage yield offered by the CD. APY accounts for compounding and represents the true annual return. CD rates vary by bank and term length, so shop around for the best offers.

Term Length — how long your money will be locked in the CD. Common terms range from 3 months to 5 years. Longer terms historically offer higher rates, though this is not always the case in all interest rate environments.

Compounding Frequency — how often interest is calculated and added to your balance. Most CDs compound daily or monthly. More frequent compounding produces slightly higher returns, though the difference is small.

The calculator shows your total interest earned, final maturity value, and the effective annual return on your deposit.

CD Rates by Term Length

CD rates vary by term and by institution. The table above shows the FDIC's national average for each term next to the Treasury yield for the same term, updated every month. The averages are weighted toward the largest banks and sit well below Treasury yields, so it pays to compare several offers: a rate close to the Treasury yield is a strong offer.

Note that longer-term CDs are not always the best deal. At the average bank, 5-year CDs have recently paid less than 1-year CDs. Always compare the APY across different terms and institutions before committing your money.

CD Laddering: A Smart Strategy for Higher Returns

A CD ladder is a strategy where you divide your savings across multiple CDs with different maturity dates. This provides both higher average returns and regular access to your money.

Here is how a $25,000 CD ladder works:

$5,000 in a 1-year CD
$5,000 in a 2-year CD
$5,000 in a 3-year CD
$5,000 in a 4-year CD
$5,000 in a 5-year CD

As each CD matures, you reinvest it into a new 5-year CD at the current rate. After the first year, you have a CD maturing every 12 months while earning the higher rates typically offered by longer-term CDs.

Benefits of CD laddering include regular liquidity (a CD matures every year), protection against rate changes (you reinvest at current rates), and higher overall returns compared to keeping all your money in short-term CDs or savings accounts.

CD vs. High-Yield Savings Account: Which Is Better in 2026?

With both CDs and high-yield savings accounts (HYSAs) offering competitive rates in 2026, choosing between them depends on your goals and timeline.

When a CD Wins

Rate lock guarantee — if the Fed cuts rates, your CD rate stays fixed. A 12-month CD at 4.75% APY keeps paying 4.75% even if savings rates drop to 3% mid-year.
Discipline — the early withdrawal penalty discourages impulsive spending. If you are saving for a down payment in 12-18 months, a CD keeps the money untouchable.
Predictable returns — you know exactly how much you will earn at maturity. No surprises, no rate adjustments.

When a HYSA Wins

Liquidity — you can withdraw anytime with no penalty. This makes HYSAs ideal for emergency funds.
Rising rate environment — if rates are going up, a HYSA automatically adjusts higher. A locked CD misses out on the increase.
Small balances — HYSAs have no minimum deposit and no term commitment, making them better for balances under $1,000.

The Hybrid Approach

Many savers use both: keep 3-6 months of expenses in a HYSA for emergencies, then put longer-term savings into a CD ladder for higher guaranteed returns. For example, if you have $30,000 in savings, you might keep $15,000 liquid in a HYSA and split $15,000 across 6-month, 12-month, and 18-month CDs.

Use the calculator above to compare how much more a CD earns versus the current HYSA rate at your bank — even a 0.50% difference on $10,000 over 12 months adds up to $50 in extra earnings.

How the Federal Reserve Affects CD Rates in 2026

CD rates are influenced by the Federal Reserve's federal funds rate, but the link is weaker than many savers assume. Understanding it helps you time your CD purchases.

How it works: when the Fed raises rates, banks tend to raise CD rates, and when it cuts, CD rates fall. At the average bank, though, the moves are slow and partial. From February 2022 to August 2024, the Fed raised its target rate by 5.25 points while the national average 12-month CD rose just 1.73 points, about 33 cents per dollar of increases (see our CD Rate Gap Report). Treasury yields react much faster.

2026 Rate Outlook

The Fed's new target range of 3.75%–4.00% took effect on September 17, 2026, its first increase since July 2023. For CD buyers, that means:

Shop around — if history repeats, the average bank will pass on only a small part of the increase. Compare offers against the Treasury yield for the same term.
Short-term ladder — if you are uncertain about the direction, build a 3-6-9-12 month ladder. This way, a portion of your money is always maturing and can be reinvested at whatever rate the market offers.
Don't assume longer pays more — at the average bank, 5-year CDs have recently paid less than 1-year CDs, even though 5-year Treasuries yield more.

The calculator above lets you model different scenarios: try comparing a 6-month CD at today's rate versus a 12-month CD to see which earns more for your situation.

How to Calculate CD Interest (Formula + Worked Example)

You don't need the calculator to understand the math behind a CD. The interest on a certificate of deposit follows the standard compound interest formula:

A = P × (1 + r/n)^n×t

A = final maturity value (what you walk away with)
P = principal (your initial deposit)
r = annual interest rate as a decimal (4.75% = 0.0475)
n = number of times interest compounds per year
t = term length in years

Worked Example: $10,000 in a 12-Month CD at 4.75%

Most banks compound CD interest daily, so n = 365:

A = 10,000 × (1 + 0.0475/365)^365×1
A = 10,000 × (1.00013014)³⁶⁵
A = 10,000 × 1.048646
A = $10,486.46

Your interest earned is $486.46, and the effective APY is 4.86% — slightly higher than the 4.75% nominal rate because of daily compounding.

Why Compounding Frequency Matters

The same $10,000 at 4.75% for one year earns different amounts depending on how often it compounds:

Compounding	Effective APY	Interest Earned
Annually	4.750%	$475.00
Monthly	4.854%	$485.40
Daily	4.864%	$486.46

The difference between annual and daily compounding on $10,000 is only about $11 per year — real, but small. When comparing CDs, the APY already bakes in the compounding frequency, so comparing APY to APY is always an apples-to-apples comparison.

CD Calculators by Term

Want a calculator focused on a specific CD term? Each of these is preset to its term length with rate guidance and examples for that duration:

3-Month CD Calculator — shortest term, maximum flexibility
6-Month CD Calculator — the most popular short-term CD
1-Year CD Calculator — often the highest-paying term in 2026
5-Year CD Calculator — lock in a long-term rate

In 2026, shorter terms (6-12 months) have frequently paid more than 5-year CDs at the average bank, so compare the APY at each term before deciding.

Specialized CDs: Jumbo, IRA, and No-Penalty

Beyond the standard term CD, banks offer several specialized products. Each works with the same calculator above — just plug in the rate and term — but they serve different goals.

Jumbo CDs

A jumbo CD requires a large minimum deposit, typically $100,000 or more. In exchange, banks historically offered higher rates. In 2026, however, the premium has narrowed: many online banks pay nearly the same APY on a standard CD as on a jumbo, so always compare. A jumbo CD is FDIC-insured only up to $250,000 per depositor per bank, so deposits above that limit at a single institution are not fully protected. See our jumbo CD calculator for high-balance examples.

IRA CDs

An IRA CD is a certificate of deposit held inside a retirement account (Traditional or Roth IRA). It combines the guaranteed return of a CD with the tax advantages of an IRA. The trade-off: your money is locked by both the CD term and IRA withdrawal rules (early withdrawal before age 59½ may trigger a 10% IRS penalty on top of the bank's early-withdrawal penalty). IRA CDs suit conservative savers near retirement who want zero principal risk. Our IRA CD calculator explains the Traditional vs. Roth tax treatment.

No-Penalty CDs

A no-penalty CD lets you withdraw your full balance before maturity without a fee, usually after the first 6-7 days. The catch: the APY is lower than a standard CD of the same term. A no-penalty CD makes sense when you want a guaranteed rate but might need the cash early — a middle ground between a CD and a high-yield savings account.

Quick Comparison

CD Type	Best For	2026 Rate vs. Standard
Standard	Most savers with a fixed timeline	Baseline
Jumbo	Deposits of $100k+	Equal to slightly higher
IRA CD	Retirement savings, no risk	Similar, tax-advantaged
No-Penalty	Cash you might need early	0.25 – 0.75% lower

Frequently Asked Questions

What is a certificate of deposit (CD)?

A CD is a savings product offered by banks and credit unions that pays a fixed interest rate for a specific term, usually ranging from 3 months to 5 years. In exchange for locking your money for the full term, you receive a higher interest rate than a regular savings account. CDs are FDIC-insured up to $250,000 per depositor per institution.

Are CDs a good investment right now?

CDs are a good choice for safe, guaranteed returns when interest rates are high. With current CD rates between 4-5% APY, they offer competitive returns with zero risk to principal. CDs are ideal for money you will not need during the term, such as an emergency fund supplement or savings for a specific future goal.

What happens if I withdraw money from a CD early?

Early withdrawal from a CD before it matures typically results in a penalty, which is usually calculated as a certain number of months of interest. For example, a 1-year CD might have a 3-month interest penalty, while a 5-year CD might charge 6 months of interest. Some banks offer no-penalty CDs, but these usually pay lower rates.

What is a CD ladder and how does it work?

A CD ladder splits your investment across multiple CDs with staggered maturity dates. For example, you might put equal amounts into 1-year, 2-year, 3-year, 4-year, and 5-year CDs. As each CD matures, you reinvest into a new 5-year CD. This gives you annual access to a portion of your funds while earning higher long-term rates.

How is CD interest taxed?

CD interest is taxed as ordinary income at your marginal tax rate, regardless of when you actually receive the money. Your bank will issue a 1099-INT form for interest earned during the year. If your CD spans multiple years, you pay taxes on the interest accrued each year, even if you do not receive a payout until maturity.

What is the difference between APR and APY for CDs?

APR (Annual Percentage Rate) is the stated interest rate without accounting for compounding. APY (Annual Percentage Yield) includes the effect of compounding and represents the true annual return. For CDs, always compare APY because it gives you the complete picture of what you will actually earn. A CD with 4.75% APR compounding daily has an APY of about 4.87%.

How do you calculate interest on a CD?

CD interest uses the compound interest formula: A = P × (1 + r/n)^(n×t), where P is your deposit, r is the annual rate as a decimal, n is the number of compounding periods per year, and t is the term in years. For example, $10,000 in a 12-month CD at 4.75% compounded daily (n=365) grows to $10,486.46 — earning $486.46 in interest. The easiest approach is to enter your numbers in the calculator above, which handles the math instantly.

How is CD interest calculated when compounded daily?

Daily compounding means interest is calculated every day on your growing balance. Using A = P × (1 + r/365)^(365×t), a $10,000 deposit at 4.75% for one year compounded daily earns $486.46 versus $475.00 compounded annually — about $11 more. Daily compounding produces the highest return of any compounding frequency, which is why most banks advertise their APY (which already accounts for daily compounding) rather than the nominal rate.

What is a jumbo CD and is the rate higher?

A jumbo CD requires a minimum deposit of typically $100,000 or more. Historically jumbo CDs paid higher rates than standard CDs, but in 2026 the premium has largely disappeared — many online banks pay nearly identical APYs regardless of deposit size. Always compare the APY directly. Remember that FDIC insurance covers only $250,000 per depositor per bank, so very large jumbo deposits at one institution may not be fully insured.

CD Calculator (Certificate of Deposit)