Bank Certificate Calculator
Bank certificate calculator works out Value at maturity and Interest earned from Amount deposited, Certificate rate and That rate is. The default figures on this page give value at maturity of 10,450.00; change any entry and the result, the working and the sources update together.
Your figures
Updates as you typeHow this is worked out
3 steps
- A 4.5% APY compounded daily (365 a year) is a nominal rate of 4.401954%.
- A = P(1 + r/n)^(n t) = 10000 * (1 + 0.04402/365)^(365 * 1).
- Value at maturity = 10450, of which 450 is interest.
Balance at each anniversarytable
| year | balance | interest |
|---|---|---|
| 1 | 10,450 | 450 |
Its 5 worked examples are re-run on every release, last on 15 September 2026. What changed
Sources and references
3 sources
Keep this result
Save it, change one figure, then compare the two
The calculation stays free. Save this scenario, adjust one assumption, save that too, and put them side by side to see exactly what the change costs you. A free account keeps 5 scenarios and 2 comparisons; Personal makes both unlimited and adds exports and private links. Nothing is saved unless you press Save.
What the bank certificate calculator calculates
Computes what a certificate of deposit is worth at maturity, the interest it earns, its annual percentage yield, and the penalty for cashing it in early; it can also solve for the rate or the term needed to reach a target balance.
How to use this bank certificate calculator
Enter Amount deposited, Certificate rate, That rate is and Interest compounds. Value at maturity updates as you type, and “Use a worked example” loads checked figures you can adjust. Change one figure at a time to see what drives the result.
How the result is worked out
Open “How this is worked out” beside the result for the step-by-step calculation behind Value at maturity, Interest earned and Annual percentage yield.
The method follows 12 CFR Part 1030 (Regulation DD), Appendix A - Annual Percentage Yield Calculation, 12 CFR 1030.4(b)(1) and 1030.4(b)(2)(ii) - disclosure of the yield and of early-withdrawal penalties and Compound interest identity A = P(1 + r/n)^(nt), inverted for the rate and the term.
10,000 at 5% APY for one year example
With Amount deposited: 10000, Certificate rate: 5, That rate is: apy, Term: 1, the calculator returns Value at maturity: 10500, Interest earned: 500, Annual percentage yield: 5. This example is checked against an independent source in the test suite.
What you can compare
Change one input at a time to see how it affects Value at maturity, Interest earned and Annual percentage yield. The inputs you can vary are Amount deposited, Certificate rate, That rate is, Interest compounds, Term and Extra months.
Results are general information, not financial, tax, legal, medical or engineering advice. Check any decision that matters with a qualified professional.
See something wrong? Report a problem with this calculator
Frequently asked questions
How much will $10,000 make in a 6 month CD?
On the figures this page opens with — amount deposited 10,000, certificate rate 5% and term 1 year — the value at maturity is 10,450. No single number fits everyone: change any figure above and the answer updates as you type, with each step of the arithmetic beside it.
How much interest does a $100,000 CD make in a year?
It needs Amount deposited, Certificate rate, That rate is, Interest compounds, Term and Extra months. Nothing else is required, and the figures stay in your browser.
What information do I need for the bank certificate calculator?
You need Amount deposited, Certificate rate, That rate is, Interest compounds, Term, Extra months, Target balance and Early-withdrawal penalty. The page opens with default figures that give value at maturity of 10,450.00, so you can see the scale before entering your own.
What does this bank certificate calculator show?
It shows Value at maturity, Interest earned, Annual percentage yield, Nominal annual rate, Rate needed for the target, Term needed for the target, Interest paid out each period and Interest after tax, with the working and any warnings for your entries.
Can I check how the bank certificate calculator result was calculated?
Yes. The “How this is worked out” section shows the calculation steps, and the sources section identifies the references used for the method.