Updated May 2026
$10,000 CD Interest Calculator (May 2026 Rates)
$10,000 is the most-searched deposit size in CD interest calculators. It is large enough that the rate difference between top and average banks meaningfully matters, but small enough that almost every bank in the market will accept it without jumbo-tier requirements. This page shows the exact interest earned at $10,000 across every standard CD term using current top rates, walks through the tax impact at common federal and state brackets, and explains the compound versus simple interest difference that affects your actual take-home yield.
Earnings at Every Standard CD Term
$10,000 deposit at the top published APY for each term length as of May 2026. Interest shown is the gross amount earned by maturity, before any federal or state income tax.
| Term | Top Bank | APY | Interest Earned | Total at Maturity |
|---|---|---|---|---|
| 3-Month | Bread Financial | 4.30% | $107 | $10108 |
| 6-Month | Bread Financial | 4.30% | $215 | $10215 |
| 1-Year | Bread Financial | 4.20% | $420 | $10420 |
| 18-Month | BMO Alto | 4.05% | $614 | $10614 |
| 2-Year | Bread Financial | 3.90% | $795 | $10795 |
| 3-Year | Synchrony Bank | 3.70% | $1152 | $11152 |
| 5-Year | Synchrony Bank | 3.60% | $1934 | $11934 |
The longest 5-year CD earns the most interest in absolute terms ($2,054) because it has the longest compounding window, even though its 3.60% APY is the lowest in the table. The 6-month CD has the highest APY (4.30%) but earns only $225 in absolute terms because the holding period is shortest. The choice of term length depends on how long you can commit the money, not on which CD has the highest absolute interest. If you can commit for 5 years, the 5-year CD wins on dollars. If you can only commit for 6 months, the 6-month CD wins on rate per unit of time.
One subtle point: the table shows top published APYs at online banks, which are 200 to 300 basis points above the FDIC National Rate average for the same terms. The FDIC publishes average rates across all insured banks at fdic.gov/resources/bankers/national-rates. As of May 2026 the national average 1-year CD rate sits near 1.80%, which would earn just $180 on $10,000 instead of $440. The gap reflects the difference between rate-competitive online banks and the typical brick-and-mortar branch CD. Where you put your money matters as much as how long you commit it for.
Tax Impact at Common Federal Brackets
CD interest is taxed as ordinary income at your marginal federal rate. The 22% bracket covers single filers earning roughly $48,475 to $103,350 in 2026 (IRS inflation-adjusted brackets per Rev. Proc. 2025-32). The 24% bracket covers $103,350 to $197,300. The 32% bracket covers $197,300 to $250,525. The 35% bracket covers $250,525 to $626,350. The 37% top bracket covers above $626,350. For married filing jointly the income breakpoints roughly double.
On $440 of 1-year CD interest the federal tax bite is $97 at 22% bracket, $106 at 24%, $141 at 32%, $154 at 35%, and $163 at 37%. Net after federal tax ranges from $343 down to $277. At higher brackets the absolute dollar bite grows roughly proportionally; the after-tax yield on the original $10,000 ranges from 3.43% in the 22% bracket down to 2.77% in the 37% bracket.
State income tax stacks on top of federal. California's top rate of 13.3% adds $59 on the $440 interest, leaving net of $284 at the 22% federal bracket and $218 at the 37% bracket. Texas, Florida, Washington, Nevada, South Dakota, Tennessee, Alaska, and Wyoming have no state income tax, so the federal bite is the only deduction. New Hampshire previously taxed interest income but the tax sunset in 2027 per the state's 2023 budget. Our taxes on CD interest page walks through the state-by-state mechanics in detail.
Compound vs Simple Interest: Does It Matter?
Compound interest pays interest on both your principal and all previously accrued interest. Simple interest pays only on the original principal. The difference matters more at longer terms and at higher compounding frequencies. Most online bank CDs compound daily, monthly, or quarterly. Brokered CDs typically pay simple interest because they trade like bonds.
Concrete example on $10,000 at 4.20% for 1 year: simple interest earns $440 flat. Annual compounding earns $440 (no compounding within the year). Quarterly compounding earns roughly $447. Monthly compounding earns roughly $449. Daily compounding earns roughly $450. The compounding frequency adds at most $10 on a 1-year CD. At 5 years on $10,000 at 3.60%: simple interest earns $1,900. Annual compounding earns $2,054. Daily compounding earns roughly $2,090. The 5-year gap between simple and daily is roughly $190.
For practical CD shopping the compounding frequency is usually a tiebreaker rather than a deciding factor. Pick the highest APY first; if two banks are within 5 basis points, prefer the one with more frequent compounding (most major online banks compound daily). The APY itself already reflects the compounding frequency, so comparing on APY is an apples-to-apples comparison.
Reinvesting $10,000 Over 5 Years
A common scenario: open a 1-year CD at 4.20%, then reinvest into a fresh 1-year CD each maturity for 5 consecutive years. Assuming the reinvestment rate stays flat at 4.20% (which it almost certainly will not in a Fed-cutting cycle), $10,000 grows to roughly $12,401 after 5 years for $2,401 in total interest. That beats the single 5-year CD at 3.60% ($2,054) by roughly $347.
The catch is that the reinvestment rate is not guaranteed. If the Fed cuts to 2.5% and 1-year CD rates drop to 3.40% over the next two years, the rolling 1-year strategy underperforms the locked 5-year. The single 5-year CD at 3.60% provides insurance against the cutting scenario. The rolling 1-year CD strategy provides upside if rates stay near 4.20% or rise. The trade is between current rate (rolling 1-year wins today) and lock-in protection (5-year wins if cuts materialize).
A laddered approach hedges both. See our 12-month CD ladder page for the standard 5-rung structure that splits the difference. With $10,000 you can build a five-rung ladder of $2,000 each at 1, 2, 3, 4, and 5 year terms, which captures some of each strategy's advantage.
Frequently Asked Questions
How much interest does a $10,000 CD earn in one year?▾
At the top 1-year CD rate of 4.20% APY from Bread Financial as of May 2026, a $10,000 deposit earns $440 in interest over 12 months. At the average 1-year online bank rate of roughly 4.00%, the same deposit earns $420. At the FDIC National Rate (which averages all insured banks including the low rates at brick-and-mortar branches), the average 1-year CD rate is closer to 1.80%, which would earn just $180. Choosing the right bank matters more than choosing the right term.
What does $10,000 earn in a 5-year CD?▾
At the top 5-year rate of 3.60% from Synchrony as of May 2026, $10,000 compounded annually for 5 years grows to $12,054, for $2,054 in total interest. Annualized that is roughly $411 per year. The longer term locks in today's 3.60% even if rates drop, which is the structural value of the 5-year commitment in a Fed-cutting cycle.
Will I owe taxes on this interest?▾
Yes. CD interest is taxed as ordinary income in the year it is paid or credited. On $440 of interest at a 22% federal bracket you owe roughly $97 in federal tax, leaving $343 net. State income tax also applies in 41 of the 50 states. In California (9.3% top rate) the state tax adds roughly $41, leaving net interest of $302. In Texas, Florida, or other no-state-tax states the federal tax is the only deduction. See our taxes on CD interest page for the full state breakdown.
What is the difference between simple and compound interest?▾
Simple interest pays interest only on your original principal. Compound interest pays interest on principal plus all previously earned interest. Most online bank CDs compound interest daily, monthly, or quarterly, which slightly increases your effective yield versus the headline APY. Brokered CDs (Fidelity, Schwab) typically pay simple interest, which marginally reduces the effective yield. On a 1-year CD the difference is small (a few dollars on $10,000); on a 5-year CD it adds up to $20 to $60 depending on compounding frequency.
Will I earn more with multiple smaller CDs or one $10,000 CD?▾
Earnings depend on the APY, not the deposit size, so two $5,000 CDs at the same bank at the same APY earn exactly the same total interest as one $10,000 CD. The case for splitting is to mix term lengths (so you have one short CD and one longer CD for laddering) or to take advantage of bank-specific minimum balance tiers. Most banks have the same APY across all balance tiers under $100,000.
Can I add money to a CD after opening?▾
Standard CDs do not allow additional deposits after opening. The principal is locked at the funding amount until maturity. A small number of banks offer add-on CDs that allow continuing deposits during the term (see our add-on CD page); these typically have a slightly lower top rate. If you expect to add money periodically, an MMA or a series of new CDs may be a better fit.
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