Roth IRA Growth Calculator: Tax-Free Future Value of a Balance
Project what a Roth IRA balance could grow to — completely tax-free — by retirement. The Roth's defining advantage is that qualified withdrawals, including all the growth, are never taxed.
Adjust the inputs and select Calculate for a full breakdown.
Compare Common Scenarios
How the numbers shift across typical situations for this calculator:
| Scenario | Projected Roth IRA value | Tax-free growth |
|---|---|---|
| $30k · 8% · 25yr | $205,454.26 | $175,454.26 |
| $10k · 9% · 35yr (young saver) | $204,139.68 | $194,139.68 |
| $100k · 7% · 15yr | $275,903.15 | $175,903.15 |
| $50k · 8% · 20yr | $233,047.86 | $183,047.86 |
How This Calculator Works
Enter your current Roth IRA balance, the expected annual return, and the years to retirement. The calculator compounds the balance annually at that rate and shows the projected value and the tax-free growth. This models a lump sum; ongoing contributions push the figure higher.
The Formula
Future Value of a Lump Sum
PV = present value, r = annual rate, n = number of years
Worked Example
A $30,000 Roth IRA balance compounding at 8% for 25 years projects to about $205,454 — $175,454 of growth that is completely tax-free in retirement. In a taxable account, that same $175,454 of gains would owe capital gains tax (potentially $35,000+ at a 20% rate); in a traditional IRA, the entire $205,454 would be taxed as ordinary income on withdrawal. The Roth's tax-free growth is the key advantage.
Key Insight
The Roth IRA's power compounds with time and tax-bracket trajectory. The longer the horizon, the more growth accumulates tax-free — making Roth contributions especially valuable for young savers with decades of compounding ahead. The Roth wins decisively when you expect to be in a similar or higher tax bracket in retirement (paying tax now at a known rate beats paying later at an unknown, possibly higher one). Roth IRAs also have no required minimum distributions, letting the tax-free growth continue untouched into your 70s and beyond — a powerful estate-planning feature.
Frequently Asked Questions
How is the Roth IRA future value calculated?
Today's balance × (1 + annual return) ^ years. A $30,000 balance at 8% for 25 years projects to about $205,454, all of it growing tax-free.
What makes the Roth IRA tax-free?
Contributions are made with after-tax money, so qualified withdrawals in retirement — including all investment growth — are completely tax-free. You pay tax once (at contribution), never again. Traditional IRAs reverse this: tax-deferred contributions, taxed withdrawals.
Roth or traditional IRA?
Roth wins when you expect a similar or higher tax bracket in retirement (pay known tax now vs unknown later). Traditional wins when you expect a lower bracket in retirement (defer tax to a cheaper time). Young savers and those expecting income growth typically favor Roth.
Are there required minimum distributions?
No — Roth IRAs have no RMDs during the owner's lifetime, unlike traditional IRAs and 401(k)s. The tax-free balance can continue compounding untouched into your 70s, 80s, and beyond, making the Roth a powerful estate-planning vehicle for heirs.
What are the contribution limits?
Annual contribution limits apply (around $7,000 in 2024, plus a $1,000 catch-up for 50+), and direct contributions phase out at higher incomes. High earners often use the 'backdoor Roth' (non-deductible traditional IRA converted to Roth) to contribute despite income limits.
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Data Sources & Benchmarks
This calculator draws on 1 independent, dated source. The starting values for expected annual return are taken from the benchmarks below and refresh whenever the snapshots are updated.
Methodology & Review
Future value compounds today's Roth IRA balance annually at a fixed expected return. The model assumes the balance stays invested and that qualified withdrawals are completely tax-free — the Roth's defining advantage. Ongoing contributions are not modeled; for contribution projections use a contribution-based Roth calculator.
Written by Ugo Candido · Last updated May 17, 2026.