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Roth IRA Calculator

Estimate your Roth IRA balance at retirement. Assumes post-tax contributions and tax-free withdrawals in retirement.

Updated April 2026

Final balance

$650,568

You contributed

$185,000

Interest earned

$465,568

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What it does

A Roth IRA calculator. Roth IRA contributions are made with after-tax money, meaning qualified withdrawals in retirement are tax-free — including all the growth. For many people, especially those with decades until retirement, this is the single best retirement account available.

At $500/month (well under the 2026 contribution limit) with 30 years of 7% returns, the balance reaches about $620,000. Every dollar of that is withdrawable tax-free in retirement — no RMDs, no surprise tax bills. Pair with a 401(k) if your employer offers a match.

Example input & output

Input

Current balance: $5,000
Monthly contribution: $500
Annual return: 7%
Years: 30

Output

Projected balance: $620,000
Total contributed: $185,000
Growth: $435,000
All withdrawable tax-free in retirement

Same contributions in a taxable brokerage would owe capital gains and dividend tax annually and at withdrawal.

How to use it

  1. Enter your current Roth balance.
  2. Enter your monthly contribution (up to the annual limit / 12).
  3. Use 7% as a reasonable long-term return assumption.
  4. Set years until retirement.
  5. Read the projected tax-free balance.

When to use this tool

  • Annual retirement planning.
  • Income below the Roth IRA contribution limit.
  • Expecting to be in the same or higher tax bracket in retirement.

When not to use it

  • If your income exceeds direct Roth limits — consider a backdoor Roth (different mechanics).
  • Traditional IRA or 401(k) analysis (those involve tax deductions now, taxable withdrawals later).

Common use cases

  • Planning tax-free retirement income.
  • Modeling the value of maxing out Roth contributions each year.
  • Comparing Roth IRA vs 401(k) prioritization.

Frequently asked questions

What’s the Roth IRA contribution limit?
The IRS adjusts the limit annually. For current year limits and income phase-outs, check IRS Publication 590-A before contributing.
Can I withdraw Roth IRA contributions before retirement?
Contributions (not growth) can be withdrawn tax- and penalty-free at any time. Growth withdrawn before age 59½ and 5 years from first contribution is usually taxable and may owe a 10% penalty.