Annual compounding
Growth is based on the expected annual return you enter. Lower or higher returns can change the projection substantially.
Compound interestrothiraestimator.com
Roth IRA compound interest calculator
Estimate how compounding could affect your Roth IRA balance from now through retirement.
Roth IRA calculator guide
How this Roth IRA compound interest calculator works
This Roth IRA compound interest calculator focuses on how current balance, yearly contributions, and expected returns can build on one another over time.
Use the yearly table to see how much of each year comes from modeled growth versus new contributions.
2026 contribution limits
For tax year 2026, the IRA contribution limit used here is $7,500. If you are age 50 or older, the calculator adds the $1,100 catch-up contribution.
Income phase-out ranges
Direct Roth IRA contributions may be reduced when modified AGI falls inside the IRS phase-out range for your filing status. Married filing separately has different treatment depending on whether you lived with your spouse during the year.
Inflation-adjusted estimates
Turning on today-dollar results discounts future balances with a 3% annual inflation assumption. Nominal future dollars are shown when the toggle is off.
Compound interest
Compound interest details to watch
Compound interest pages should explain the growth engine, not only show the final balance. These notes make the annual compounding assumption explicit.
Order of operations
The calculator grows the existing balance first, then applies the modeled contribution at the end of the year. That means it is conservative compared with contributing at the beginning of every month, but it keeps the math easy to inspect in the table.
Return sensitivity
A higher expected annual return increases the curve, but it also increases uncertainty. Try 5%, 7%, and 9% as separate scenarios rather than treating any single return as a forecast.
Contribution versus growth
The growth metric separates estimated investment growth from your modeled contributions. That split helps show whether the account is mostly being built by deposits or by compounding on earlier deposits.
Nominal and real dollars
Turning on the today-dollar view discounts future balances using the inflation assumption. It does not change the nominal account projection; it changes the way the future balance is displayed.
Related Roth IRA calculators
Calculator by ageCompare age presets and compounding timelines.Contribution calculatorCheck contribution room and limits.Eligibility calculatorCheck income and filing-status eligibility.Future valueEstimate future account value.Main estimatorEstimate growth, limits, and retirement balance.Max contributionCompare with a max-contribution scenario.Phase-out calculatorEstimate income phase-out effects.Retirement calculatorEstimate balance at retirement age.
Roth IRA contribution sources
The contribution and phase-out logic is labeled by tax year because IRS limits can change. Use the official IRS pages below when you need the source rules behind the Roth IRA calculator.
Last updated June 7, 2026. Contribution limits and phase-out ranges are labeled for tax year 2026; always confirm current rules before making a contribution.
How is Roth IRA compound interest calculated here?
This estimator compounds once per year and applies modeled contributions at year end. It is designed for transparent planning rather than exact account-level transaction timing.
How much can I contribute to a Roth IRA in 2026?
For tax year 2026, the IRA contribution limit is $7,500. People age 50 or older can add a $1,100 catch-up contribution, for a total of $8,600, subject to income and compensation rules.
What happens if my income is too high for a Roth IRA?
If your modified adjusted gross income falls within a Roth IRA phase-out range, your direct contribution limit may be reduced. Above the top of the range, direct Roth IRA contributions may not be available.
Does this Roth IRA calculator account for inflation?
The calculator can show nominal future dollars or an inflation-adjusted view using a 3% annual inflation assumption. Actual inflation and investment returns will vary.
Is the Roth IRA contribution limit per account or per person?
The IRA contribution limit generally applies per person across traditional and Roth IRAs combined, not separately to every IRA account. This estimator subtracts traditional IRA contributions you enter and caps modeled Roth IRA contributions at taxable compensation.
Understanding the growth breakdown
Compound-interest searches usually need more than a final number. This section explains how to use the breakdown table to understand where the projected dollars come from.
Growth share changes
Early in a savings timeline, new contributions can be larger than investment growth. Later, the same annual contribution may become smaller than the growth produced by the accumulated balance.
Same timeline, different base
The breakdown table uses the same return and retirement age for each row so the starting balance and contribution plan are the main variables being compared.
Growth, not tax advice
For a Roth IRA, this calculator does not estimate taxes on qualified withdrawals. The table focuses on account growth mechanics, not withdrawal tax treatment.
Privacy and measurement
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