Roth IRA Calculator 2026 — Contribution Limits ($7,500) & Tax-Free Growth

A Roth IRA calculator projects how much your retirement account will be worth by retirement, and — unlike a traditional 401k or IRA — every dollar of that growth comes out completely tax-free in retirement, since Roth contributions are made with money that has already been taxed. Enter your current age, retirement age, existing balance, and annual contribution to see your projected tax-free balance, how much of it is your own contributions versus investment growth, and exactly how powerful decades of tax-free compounding can be.

How to use this Roth IRA Calculator

1. 1Enter your planned annual contribution — the 2026 limit is $7,500 under age 50, or $8,600 for age 50 and older (including the $1,100 catch-up contribution).
2. 2Enter your existing Roth IRA balance, if any.
3. 3Enter your current age and planned retirement age — the gap between them determines your years of tax-free compounding.
4. 4Adjust the expected annual return slider. 7% is a common conservative long-term estimate for a diversified stock portfolio.
5. 5Read your projected tax-free balance at retirement, the breakdown between contributions and growth, and total years invested.

Roth IRA future value formula explained

A Roth IRA balance grows in two parts: the existing balance compounds on its own, and each year's new contribution grows for a different number of years depending on when it was made. The combined formula is the future value of a lump sum (the existing balance) plus the future value of a series of equal annual contributions (an ordinary annuity) — the same math used for any regularly-contributed investment account.

Roth IRA growth example: age 30 to 65, $15,000 starting balance, $7,500/year at 7%

1. 01Years to retirement: 65 − 30 = 35 years.
2. 02Existing balance grows: $15,000 × (1.07)^35 = $160,182.
3. 03Contributions grow: $7,500 × [((1.07)^35 − 1) / 0.07] = $1,036,777.
4. 04Future value: $160,149 + $1,036,777 = $1,196,926.
5. 05Total contributed over 35 years: ($7,500 × 35) + $15,000 = $277,500.
6. 06Tax-free growth: $1,196,926 − $277,500 = $919,426.

What determines how much your Roth IRA will be worth?

Tips and things to know

• ✓Contribute as early in the year as possible rather than waiting until the tax deadline — money invested in January has roughly 15 months more growth time than the same contribution made the following April.
• ✓If you are above the income limit for direct Roth contributions, a backdoor Roth IRA (contribute to a traditional IRA, then convert) achieves the same tax-free growth — consult a tax professional to execute this correctly given the pro-rata rule.
• ✓A Roth IRA is especially valuable if you expect to be in a higher tax bracket in retirement than you are now, since you pay tax on contributions today at your current rate rather than on withdrawals later at a potentially higher rate.
• ✓Unlike a traditional IRA or 401k, Roth IRAs have no Required Minimum Distributions (RMDs) during the original owner's lifetime, making them a useful estate planning tool in addition to a retirement account.
• ✓Contributions (not earnings) can always be withdrawn tax- and penalty-free at any time, which makes a Roth IRA more flexible than other retirement accounts for unexpected needs — though earnings should generally stay invested until retirement.

Roth IRA Calculator — bottom line

A Roth IRA's core advantage — tax-free growth and tax-free withdrawals — only compounds over time. The earlier you open and contribute, the more powerful the tax benefit becomes. A $7,500 contribution at age 25 that grows at 7% annually becomes approximately $112,000 by age 65 — entirely tax-free. The same $7,500 at age 45 grows to roughly $29,000 — still valuable, but the tax benefit is far less dramatic. This is why the most impactful Roth IRA decision is simply opening one as early as possible and contributing the maximum allowed ($7,500 in 2026; $8,600 if 50+). The most common mistake is confusing income limits with ineligibility. Above certain income thresholds, direct Roth IRA contributions phase out — but the backdoor Roth strategy (contributing to a traditional IRA then converting) remains available to most high-income earners. The contribution limit also applies per person, not per household, so both you and a spouse can each contribute $7,500 annually. Second common mistake: leaving contributions uninvested. Many people open a Roth IRA, contribute money, and leave it sitting as cash inside the account. The Roth IRA is a tax wrapper — you must choose investments inside it (typically broad index funds) for the growth to occur. "Money in a Roth IRA" is not the same as "invested in a Roth IRA." Check your actual investment selection. Third mistake: withdrawing contributions prematurely. Roth IRA contributions can be withdrawn penalty-free at any time — but doing so removes the tax-free growth permanently. Treat the Roth IRA as untouchable until retirement. Use this calculator to model the contribution-to-age-65 outcome and compare contributing now vs delaying 5 years to see the true cost of delay.

Official resources and further reading