Before calculating
Prepare Starting balance, Monthly contribution, Assumed annual return and Years to model. Match each input to the document, measurement, or current source you are using. Keep units, dates, currency, and time periods consistent.
LONG-TERM SAVING SCENARIOS
Roth IRA Scenario Calculator
Model a Roth IRA contribution scenario using your own contribution and return assumptions.
Review your result
Your result
Ready when you are.
Enter your values and select Calculate. Your result stays on this device.
How it works
Future value combines the starting balance and end-of-month contributions at the annual return you enter, compounded monthly.
Assumptions
Returns, fees, taxes, inflation, contribution limits, and losses are not modeled unless you adjust the inputs yourself.
Use case
roth ira calculator: a clear planning check
Model a Roth IRA contribution scenario using your own contribution and return assumptions. The stated formula, assumptions, and result limits remain visible so the calculation can be checked in context.
Use a clear roth ira calculator scenario with values you can verify before relying on the result.
Build a reliable scenario
How to use and verify your Roth IRA Scenario Calculator result
Roth IRA Scenario Calculator helps you check a specific savings & retirement question with figures that apply to you. Model a Roth IRA contribution scenario using your own contribution and return assumptions. Model a Roth IRA contribution scenario using your own contribution and return assumptions. The stated formula, assumptions, and result limits remain visible so the calculation can be checked in context. Use a clear roth ira calculator scenario with values you can verify before relying on the result. The page keeps the method and limits visible so the result can be understood, compared, and checked instead of treated as an unexplained answer.
What changes the result?
The stated method is: Future value combines the starting balance and end-of-month contributions at the annual return you enter, compounded monthly. Change one assumption at a time to see which input drives the result, then compare scenarios on the same basis.
When checking the answer
Returns, fees, taxes, inflation, contribution limits, and losses are not modeled unless you adjust the inputs yourself. Eligibility, tax treatment, and contribution limits are not determined by this tool.
Quick verification checklist
- • Confirm the date and unit of every input.
- • Replace defaults with values that match your case.
- • Compare the answer with a second scenario.
- • Use the official source for regulated or high-impact decisions.
Source and update
Last reviewed: 2026-08-10
IRS — retirement plans and contribution guidanceFrequently asked questions
Is Roth IRA Scenario Calculator free to use?
Yes. This calculator runs in your browser and does not require an account.
Is the result guaranteed?
Returns, fees, taxes, inflation, contribution limits, and losses are not modeled unless you adjust the inputs yourself.
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