Calculator Inputs
Formula Used
Step 1: Annual IRA limit = standard limit, or age 50 plus catch-up limit.
Step 2: Eligible IRA limit = lesser of annual IRA limit and taxable compensation.
Step 3: Phaseout ratio = (MAGI - lower phaseout limit) ÷ phaseout range.
Step 4: Reduced limit = eligible IRA limit - (eligible IRA limit × phaseout ratio).
Step 5: Round the reduced limit up to the nearest $10. If it is above $0 but below $200, use $200.
Step 6: Final Roth limit = lesser of reduced limit and eligible IRA limit minus traditional IRA contributions.
Growth Projection: New balance = previous balance × (1 + return rate) + planned yearly Roth contribution.
How to Use This Calculator
- Select the tax year for the contribution.
- Choose your filing status carefully.
- Enter your age at the end of the tax year.
- Enter modified adjusted gross income and taxable compensation.
- Add any traditional IRA contribution for the same year.
- Enter the Roth amount you want to contribute.
- Add balance, return, and years for the projection chart.
- Press calculate, then download the CSV or PDF report.
Example Data Table
| Tax Year | Status | Age | MAGI | Compensation | Traditional IRA | Estimated Roth Limit |
|---|---|---|---|---|---|---|
| 2026 | Single | 35 | $140,000 | $80,000 | $0 | $7,500 |
| 2026 | Single | 35 | $160,500 | $80,000 | $0 | $3,750 |
| 2026 | Married Filing Jointly | 52 | $247,000 | $120,000 | $0 | $4,300 |
| 2026 | Married Filing Separately, Lived With Spouse | 40 | $11,000 | $60,000 | $0 | $0 |
Roth IRA Contribution Planning
A Roth IRA can be powerful because qualified withdrawals may be tax free. The challenge is knowing how much you can contribute before you send money. Your limit depends on tax year, age, earned compensation, filing status, modified adjusted gross income, and any traditional IRA deposits made for the same year.
This calculator brings those inputs together in one view. It estimates the annual Roth IRA room, the income phaseout reduction, planned contribution fit, possible excess amount, and unused room. It also gives a monthly equivalent, which helps users build a simple saving habit.
How Phaseouts Affect Direct Contributions
Roth IRA rules reduce the direct contribution limit when income enters the phaseout band. The reduction is gradual. A higher modified adjusted gross income produces a smaller allowable contribution. Once income reaches the upper threshold, the direct Roth IRA contribution becomes zero for that filing status.
The calculator applies the selected year rules, then compares the result with taxable compensation. It also subtracts traditional IRA contributions because the combined IRA limit covers both account types. This makes the estimate more practical for people using more than one IRA.
Using The Growth Projection
The projection is not a promise. It is a planning model. It compounds the current Roth balance by the expected annual return. It then adds the allowed contribution at the end of each year. The chart shows how consistent deposits may affect long term value.
Small changes can matter. A slightly higher contribution, longer time period, or better return assumption may create a large difference over decades. Users should test conservative and optimistic cases before making a decision.
Helpful Planning Notes
Use modified adjusted gross income, not only salary. Include earned compensation because investment income alone may not support regular IRA contributions. Check employer plan activity only when reviewing separate traditional IRA deduction rules. Direct Roth IRA eligibility is mainly driven by filing status and modified adjusted gross income.
This tool is for education and planning. Tax rules can change each year. Personal situations can be complex. Review IRS guidance or speak with a qualified tax professional before making final contributions, recharacterizations, or corrective withdrawals.
FAQs
1. What does this Roth IRA calculator estimate?
It estimates your direct Roth IRA contribution limit. It also shows income phaseout impact, possible excess contribution, unused room, monthly equivalent, and projected account growth based on your assumptions.
2. Which income number should I enter?
Enter modified adjusted gross income for Roth IRA purposes. This may differ from salary or gross income. Use tax software, IRS worksheets, or a tax professional when unsure.
3. Why does taxable compensation matter?
Regular IRA contributions generally need eligible compensation. If compensation is lower than the annual IRA limit, the calculator uses the lower compensation amount before applying phaseout rules.
4. Does the limit include traditional IRA deposits?
Yes. Roth and traditional IRA contributions share one combined annual limit. This calculator subtracts traditional IRA contributions before showing the final Roth contribution room.
5. Why is my result rounded?
When the Roth limit is reduced by income phaseout, IRS worksheet rules round the reduced amount up to the nearest ten dollars. Small positive results may become two hundred dollars.
6. What happens if I contribute too much?
An excess contribution may create tax penalties if not corrected on time. Contact a tax professional or IRA custodian for correction options, deadlines, and earnings calculations.
7. Is the projection guaranteed?
No. The projection is only an estimate. It uses your annual return assumption and planned contribution amount. Actual market results, fees, and tax rules can differ.
8. Can high income earners still use Roth strategies?
Some users consider other Roth strategies, such as conversions. Those choices can involve tax costs, pro rata rules, and timing issues. Get professional advice before acting.