Roth IRA calculator
How much you can put into a Roth IRA this year given your income, and what it could grow to tax-free.
About the roth ira calculator
How much you can put into a Roth IRA this year given your income, and what it could grow to tax-free.
Part of SmartCalcy’s retirement tools. It runs in your browser with no account, uses your own currency and units (change them at the top of the page), and gives estimates for information only, so check official guidance before you rely on a result.
How to use the roth ira calculator
What it calculates and when to use it
Shows how much you can contribute to a Roth IRA this year given your income and filing status, and projects tax-free growth.
How to use it, step by step
- Choose your filing status and enter your modified adjusted gross income.
- Enter your age, the age you will withdraw and the expected return.
- Read the allowed contribution and the projected balance.
What each input means
- MAGI – Your adjusted gross income with certain deductions added back.
- Filing status – Sets the income phase-out range.
How to read the results
- You can contribute – The full limit, a reduced amount or zero.
- Balance at withdrawal age – The projected value contributing that amount each year.
The formula
Limit = 7,500 (plus 1,100 if 50 or older). In the phase-out range the contribution = limit × (top of range − MAGI) ÷ range width, rounded up to the next 10 with a minimum of 200. Balance = balance × (1 + r)^n + contribution × ((1 + r)^n − 1) ÷ r × (1 + r).
A worked example
A single filer with 90,000 MAGI is below the 153,000 phase-out start and can contribute the full 7,500. Contributing that for 25 years at 7% grows to 507,574, of which 320,074 is tax-free growth.
Assumptions and limits
- 2026 limits and phase-out ranges (single 153,000–168,000, married filing jointly 242,000–252,000, married filing separately 0–10,000).
- Earned income must be at least your contribution.
- Contributions are made at the start of each year.
Common mistakes
- Contributing above the limit, which triggers a penalty.
- Forgetting that withdrawals of earnings before 59½ may be taxed.
Frequently asked questions
What if my income is too high?
You may still be able to use a “backdoor” Roth conversion. Ask a tax adviser.
Dated rules: US federal figures for tax year 2026 (IRS Rev. Proc. 2025-32 and IRS notices). These calculators are estimates for planning, not tax advice.
Related tools
Details
- Phase-out range
- £153,000 to £168,000
- Balance at withdrawal age
- £507,574contributing £7,500 a year
- Total you put in
- £187,500
- Tax-free growth
- £320,074