IRA Calculator

An IRA’s account balance grows the same way regardless of which type you hold — Traditional or Roth — through the identical compound growth process. This calculator projects that growth from your contributions and expected return, though it’s worth understanding upfront that it doesn’t distinguish between the two IRA types’ very different tax treatment, which matters enormously for your actual long-term outcome.

How the IRA Calculator Works

Enter your current age, planned retirement age, current IRA balance, monthly contribution, and expected rate of return before and during retirement, and the calculator projects your account balance forward using standard compound growth, then compares that projection against an estimated income need in retirement to show whether you’re on track for a surplus or facing a shortfall.

An Important Limitation: This Calculator Doesn’t Distinguish Traditional From Roth

This is genuinely important to understand, since Traditional and Roth IRAs are taxed in opposite ways, even though the account balance growth math this calculator performs is identical for both. A Traditional IRA uses pre-tax contributions (reducing your taxable income now) and taxes withdrawals as ordinary income in retirement. A Roth IRA uses after-tax contributions (no upfront tax benefit) but allows qualified withdrawals in retirement completely tax-free. This calculator projects the raw account balance growth, which looks identical on paper for both types given the same contribution and return assumptions — but the actual spendable amount you’ll have access to in retirement differs substantially between the two, since a Traditional IRA balance still has future tax owed on it, while a Roth IRA balance of the identical size represents money you can actually spend in full.

Why This Difference Matters More at Larger Balances

Because this calculator’s projected balance represents pre-tax dollars for a Traditional IRA but genuinely spendable dollars for a Roth IRA, two accounts with identical projected balances from this calculator represent meaningfully different actual retirement resources depending on which type they are. A $500,000 projected Traditional IRA balance might realistically provide $375,000 to $400,000 in actual spendable money after retirement-year taxes are paid, while a $500,000 Roth IRA balance provides the full $500,000 to spend, assuming qualified withdrawal rules are met. This gap grows in absolute dollar terms as the projected balance itself grows, which is exactly why choosing between Traditional and Roth — a decision this calculator doesn’t make for you — has real, compounding financial consequences beyond just the account growth math shown here.

Annual Contribution Limits: A Legal Constraint This Calculator Doesn’t Enforce

IRAs, unlike 401(k)s, have their own separate and generally lower annual contribution limits set by the IRS, with an additional catch-up contribution allowed once you reach age 50. These limits are adjusted periodically and apply combined across all your IRA accounts (Traditional and Roth together), not per account — meaning you can’t simply contribute the full limit to both a Traditional and a Roth IRA in the same year. This calculator doesn’t check your entered monthly contribution against current IRS limits, so verify that your planned contribution amount is actually legally permissible under current rules before relying on this projection, since exceeding the limit can trigger tax penalties on the excess contribution.

Income Limits That Can Restrict Roth IRA Eligibility

Beyond the contribution limit itself, Roth IRA eligibility phases out entirely above certain income thresholds, which vary by filing status and are also adjusted periodically — a restriction that doesn’t apply to Traditional IRA contributions in the same way, though Traditional IRA tax-deductibility can also phase out at certain income levels if you’re covered by a workplace retirement plan. These income-based eligibility rules are genuinely important to check against current IRS guidance before assuming you can contribute to either account type at all, since this calculator has no way to verify your eligibility for either type based on your income.

Choosing Between Traditional and Roth: A Question of Tax Rates Now vs. Later

The core decision between the two types often comes down to a genuinely uncertain bet: is your tax rate likely to be higher now (favoring Roth, since you pay tax at today’s rate and avoid it later) or higher in retirement (favoring Traditional, since you defer tax until a potentially lower future rate)? Neither answer is universally correct, since it depends on your current income relative to your expected retirement income and on future tax policy, which nobody can predict with certainty — this calculator’s growth projection is identical either way, since that specific tax-rate comparison is a separate decision this tool doesn’t attempt to resolve for you.

General Retirement Growth Projection

This calculator shares its underlying compound growth and retirement-need comparison logic with the general Retirement Calculator on this site, which frames the identical calculation without IRA-specific terminology, useful if you’re projecting retirement savings across multiple account types combined rather than an IRA specifically.

401(k) Comparison: A Different Retirement Account With Its Own Rules

If you’re comparing an IRA against a workplace 401(k) — which has different, generally higher contribution limits and often includes employer matching — the 401K Calculator shares this same underlying growth engine, applied to that separate account type’s own specific context.

Required Minimum Distributions in Retirement

Once you reach a certain age, Traditional IRAs (unlike Roth IRAs during the original owner’s lifetime) require minimum annual withdrawals. The RMD Calculator handles that separate calculation using the IRS Uniform Lifetime Table, relevant specifically to Traditional IRA balances once you reach the applicable age.

Frequently Asked Questions

Does this calculator tell me whether to choose a Traditional or Roth IRA?

No — it projects account balance growth, which is mathematically identical for both types given the same contributions and returns. The actual choice between them depends on comparing your current tax rate against your expected retirement tax rate, a separate decision this calculator doesn’t make for you.

Why does a Traditional and Roth IRA with the same projected balance represent different actual value?

Because Traditional IRA withdrawals are taxed as ordinary income in retirement, while qualified Roth IRA withdrawals are tax-free. A Traditional IRA’s projected balance still has future tax owed on it, while an identical Roth IRA balance represents fully spendable money.

Does this calculator check IRS contribution limits?

No — IRAs have their own annual contribution limits, generally lower than 401(k) limits, plus an additional catch-up amount after age 50. Verify your planned contribution against current IRS limits separately, since this calculator doesn’t enforce them.

Can anyone contribute to a Roth IRA regardless of income?

No — Roth IRA eligibility phases out above certain income thresholds that vary by filing status. Check current IRS income limits for your specific filing status before assuming Roth IRA eligibility, since this calculator doesn’t verify that for you.

Do Roth IRAs require minimum distributions like Traditional IRAs?

Generally no, not during the original account owner’s lifetime, unlike Traditional IRAs, which do require minimum distributions starting at a certain age. The RMD Calculator on this site addresses that Traditional IRA requirement specifically.