CD Calculator: Interest, Maturity Value and After-Tax Earnings
Enter the deposit, APY and term to see the maturity value and interest. Add your tax rates to see what you keep — CD interest is taxed as ordinary income every year, even before the CD matures.
$105,350.00 at maturity
$100,000 at 5.35% APY for 12 months earns $5,350.00 in interest. After 22% federal and 5% state tax you keep $3,905.50.
At the FDIC national average for this term (1.76%), the same deposit would earn $1,760.00: $3,590.00 less.
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Today's best CD rates around 1 year (8–14 months)
- Justice Federal Credit Union 5.35% 9 months · Membership required · branches in 9 states
- Del Norte Credit Union 5.23% 13 months · Membership required · branches in NM
- Community First Credit Union 5.05% 10 months · Membership required · branches in WI
- Capital Credit Union (Wisconsin) 5.00% 10 months · Membership required · branches in WI
- Coastal Credit Union 5.00% 12 months · Membership required · branches in NC
From the institutions we track, verified daily. See all rates.
How CD interest is calculated
Maturity value = deposit × (1 + APY)months / 12. APY already includes compounding, so no compounding setting is needed.
Example: $10,000 at 4.30% APY for 11 months grows to 10,000 × 1.04311/12 = $10,393.47, or $393.47 of interest.
CD interest reference table using verified rates
This CD interest calculator estimates earnings using the highest exact-term rate in our tracked results, not an assumed nationwide offer. A dash means an exact-term quote is unavailable or the deposit is below the stated minimum. Interest remains in the CD; taxes and fees are excluded.
| Term and source | $5,000 | $10,000 | $25,000 | $50,000 | $100,000 |
|---|---|---|---|---|---|
| 3 monthsNewtek Bank: 4.60% APY; verified October 24, 2026 | $56.53 | $113.07 | $282.67 | $565.34 | $1,130.68 |
| 6 monthsJustice Federal Credit Union: 5.20% APY; verified October 24, 2026 | — | — | — | — | $2,567.05 |
| 12 monthsCoastal Credit Union: 5.00% APY; verified October 24, 2026 | $250.00 | $500.00 | $1,250.00 | $2,500.00 | $5,000.00 |
| 24 monthsTower Federal Credit Union: 5.20% APY; verified October 24, 2026 | $533.52 | $1,067.04 | $2,667.60 | $5,335.20 | $10,670.40 |
| 60 monthsTower Federal Credit Union: 5.05% APY; verified October 24, 2026 | — | — | $6,983.08 | $13,966.16 | $27,932.32 |
Unknown minimums do not imply eligibility. Check each institution's product, location and membership terms. For a different CD rate, enter the APY in the calculator above.
How much does a 1-year CD earn at typical rates?
The table above uses the single highest quote. Most CDs pay less. These rows apply one-year rates from the FDIC national average and our daily CD rate index to common deposits, before tax.
| Benchmark and APY | $5,000 | $10,000 | $25,000 | $50,000 | $100,000 |
|---|---|---|---|---|---|
| FDIC national average: 1.76%Deposit-weighted average across insured institutions | $88.00 | $176.00 | $440.00 | $880.00 | $1,760.00 |
| Tracked median: 3.55%Median of 416 independent institutions | $177.50 | $355.00 | $887.50 | $1,775.00 | $3,550.00 |
| Tracked top 10% (P90): 4.25%90th percentile of the same 416 institutions | $212.50 | $425.00 | $1,062.50 | $2,125.00 | $4,250.00 |
Index rates use the highest $10,000-applicable quote per regulator at exactly 12 months, verified within seven days, excluding relationship-only rates. Interest is taxed as ordinary income; enter your rates above or use the after-tax and inflation calculator.
Questions
How much does a $10,000 CD earn?
At 4.00% APY, $10,000 earns about $400 in 12 months, $198 in 6 months and $816 over 2 years, before tax. Enter your APY and term above for an exact figure.
Is CD interest taxable?
Yes. CD interest is taxed as ordinary income at the federal and state level, in the year it is credited, even if you leave it in the CD.
What happens when a CD matures?
Most CDs renew automatically for the same term at the rate in effect at renewal, which can be much lower than a promotional rate. Check the account disclosure for the grace period and renewal terms.
How do I calculate CD interest manually?
Convert APY to a decimal, add 1, raise that to months divided by 12, multiply by the deposit, then subtract the deposit. This assumes interest stays in the CD and there are no withdrawals.
Does this CD rate calculator use APR or APY?
Use the advertised APY. Entering a nominal interest rate instead can understate compounding; convert it with the APY calculator first.
Does the estimate include early withdrawal penalties?
No. The maturity estimate assumes you keep the CD for the full term. Use the early withdrawal calculator and your account disclosure to estimate the cost of closing it sooner.
Sources and assumptions
See the APY calculation rules, CFPB guide to CDs, and IRS guidance on interest income. Results are estimates based on the inputs and assumptions above; account disclosures control actual payouts and penalties.