Tool · Projections

What Starting Your Roth IRA Earlier Is Worth

The biggest driver of a Roth IRA’s final value usually isn’t how much you contribute — it’s how long that money compounds tax-free. This calculator isolates a single variable: time. Same contribution, same return, the only difference is when you start.

2026 IRS Limits· Time-Value of Money· Runs Locally · By RothIRAHub Editorial · Updated 2026-05-25 · Editorial reference content

All calculations run locally in your browser. Your inputs are never transmitted or stored.

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Your numbers

Current age

Retirement age

Annual contribution ($)SET TO 2026 LIMIT ($7,500)

The 2026 base IRA limit is $7,500 (§219(b)(5)(A); IRS Notice 2025-67).

Assumed annual return

Illustrative real (after-inflation) return. Markets aren’t guaranteed — this is a hypothetical, not a forecast.

Years you delay starting

1start at age 20

At age , contributing /yr at %:

Start now (age )

years of contributions

Wait (start at )

years of contributions

The cost of waiting

Assumes an equal end-of-year contribution every year until retirement age and a constant return. Ignores fees and future contribution-limit changes. Qualified Roth withdrawals are tax-free, so no tax is applied. Illustrative only — not investment advice.

Why time beats the amount

A dollar invested at 25 has many more years to double than a dollar invested at 45. That is why the contributions you make earliest do the most work — they compound for the longest. Two people who contribute the exact same total over their lives can retire with very different balances based purely on who started first. The calculator above turns that abstract idea into a dollar figure.

How the math works

Each scenario assumes you contribute the same amount at the end of every year until your retirement age, growing at the return you set. The “start now” balance runs for the full stretch; the “wait” balance runs for fewer years and its dollars have less time to compound. The difference between the two is the cost of the delay. Everything else is held equal — same contribution, same return — so the only thing being measured is time.

Real returns vary year to year, fees and taxes differ by account, and the IRS contribution limit rises over time. Treat the result as an illustration of the shape of the tradeoff, not a prediction of your actual balance.

Want a full projection instead?

This tool deliberately changes only one thing — when you start. To model changing contributions, age-50 catch-ups, market volatility, and inflation, use the Roth IRA Growth Projector, which runs a full multi-decade projection with percentile bands. Think of this page as the “cost of waiting” companion to that calculator.

This is an educational illustration, not tax, legal, or investment advice. Your actual results depend on your investments, fees, contribution amounts, and market returns. Confirm any decision with your own financial or tax professional.

Tool

Roth IRA Growth Projector

The full multi-decade projection — contributions, catch-ups, and market-volatility bands.

Guide

Custodial Roth IRA for Kids

The ultimate “start earlier” move — decades of tax-free compounding from a child’s first earned income.

Contributions

2026 Contribution Limits

How much you can put in each year — the input that feeds this calculator.

Basics

Roth IRA Basics

New to Roth IRAs? Start with how the account works and why tax-free growth matters.