How the Traditional IRA Calculator Works
The calculator uses the future value formula for a growing annuity to project your IRA balance from today until retirement, compounding annually. Starting with your current balance, it adds your annual contribution and applies the expected annual return each year.
The after-tax value applies your expected retirement tax rate to the full balance — since Traditional IRA withdrawals are taxed as ordinary income. The tax deduction benefit estimates the total tax savings from deducting contributions at your current marginal rate.
taxDeductionBenefit = totalContributions × currentTaxRate
2025 Traditional IRA Rules and Contribution Limits
| Rule | 2025 Details |
|---|---|
| Annual contribution limit (under 50) | $7,000 |
| Annual contribution limit (50 and older) | $8,000 (with $1,000 catch-up) |
| Deduction phase-out — single, with workplace plan | $79,000 – $89,000 MAGI |
| Deduction phase-out — married filing jointly, with plan | $126,000 – $146,000 MAGI |
| Earliest penalty-free withdrawal | Age 59½ |
| Required minimum distributions begin | Age 73 (SECURE 2.0 Act) |
| Early withdrawal penalty | 10% + ordinary income tax |
| Tax treatment of withdrawals | Ordinary income at your retirement rate |
The Tax Deduction Advantage
The defining feature of a Traditional IRA is the potential upfront tax deduction. When you contribute $7,000 to a Traditional IRA at a 22% marginal tax rate, you reduce your taxable income by $7,000 — saving $1,540 in federal taxes that year. Over 30 years of maximum contributions, that adds up to $46,200 in cumulative deductions at the 22% rate.
This makes the Traditional IRA particularly valuable for high earners who need to reduce current taxable income, or for people who expect to be in a significantly lower tax bracket in retirement. The key insight: if you pay taxes at 32% today but only 15% in retirement, you're arbitraging a 17-percentage-point tax rate difference on every dollar contributed.
| Starting Age | $7,000/yr · 7% return · Retire at 65 | After-Tax Value (22% rate) |
|---|---|---|
| 25 | $1,453,000 | $1,134,000 |
| 30 | $1,020,000 | $796,000 |
| 35 | $707,000 | $551,000 |
| 40 | $482,000 | $376,000 |
| 45 | $320,000 | $250,000 |
* Approximations. $0 starting balance, $7,000/year contributions, 7% annual return compounded annually. After-tax value assumes 22% retirement tax rate.
Required Minimum Distributions at Age 73
Unlike a Roth IRA, a Traditional IRA requires you to start withdrawing money at age 73 — these are called Required Minimum Distributions (RMDs). The IRS calculates the minimum annual withdrawal using your account balance and a life expectancy factor from IRS Uniform Lifetime Table III. For a 73-year-old, the factor is 26.5, meaning you must withdraw at least 1/26.5 (about 3.8%) of your balance each year.
RMDs increase as a percentage of your balance each year as the life expectancy factor decreases. At 80, the factor is 20.2 (about 5% required withdrawal). At 90, it's 12.2 (about 8.2%). This mandatory drawdown means a large Traditional IRA balance in your late 70s and 80s can push you into higher tax brackets and affect Medicare premium surcharges (IRMAA).
Traditional IRA vs. Roth IRA: Which Is Right for You
The core question is whether your marginal tax rate is higher now or in retirement. Since neither is knowable with certainty, the practical framework:
- Choose Traditional IRA if: You are in a high tax bracket now (24%+) and expect significantly lower income in retirement. You need the current-year deduction to lower your taxable income. You are close to a bracket threshold and the deduction would push you into a lower bracket.
- Choose Roth IRA if: You are early in your career with lower current income. You expect tax rates to rise over your lifetime. You want flexibility — no RMDs, contributions withdrawable anytime. You are under the Roth income limits ($150,000 single / $236,000 married for 2025).
- Consider both: Tax diversification means having both pre-tax (Traditional) and post-tax (Roth) assets in retirement lets you strategically manage which account you draw from each year to minimize your total lifetime tax bill.
Questions You Might Ask
What is the Traditional IRA contribution limit for 2025?
$7,000 per year ($8,000 if age 50 or older). Contributions must not exceed your earned income for the year. You can split contributions across a Traditional and Roth IRA, but the combined total cannot exceed $7,000 ($8,000 if 50+).
Are Traditional IRA contributions tax-deductible?
Deductibility depends on whether you or your spouse has a workplace retirement plan and your income. Without a workplace plan, contributions are fully deductible at any income level. With a workplace plan, the deduction phases out for single filers between $79,000–$89,000 MAGI and for married filing jointly between $126,000–$146,000 in 2025. Non-deductible contributions are still allowed — growth remains tax-deferred.
When do I have to start taking money out of a Traditional IRA?
Required minimum distributions begin at age 73 under the SECURE 2.0 Act. Missing an RMD results in a 25% excise tax on the shortfall (reduced to 10% if corrected promptly). There are no RMDs from a Roth IRA during the owner's lifetime, which is a key flexibility advantage of Roth accounts.
Can I have both a Traditional IRA and a 401(k)?
Yes. You can contribute to both a Traditional IRA and a 401(k) in the same year — the contribution limits are separate. However, having a 401(k) (or other workplace plan) does affect whether your Traditional IRA contributions are deductible, based on the income thresholds above. You can still contribute to the IRA even if it is not deductible.
What is a Backdoor Roth IRA and how does it relate?
If your income exceeds the Roth IRA direct contribution limits, a Backdoor Roth converts a non-deductible Traditional IRA contribution into a Roth IRA. You contribute to a Traditional IRA (allowed at any income), then immediately convert it to Roth. Taxes owe only on any gains between contribution and conversion — minimal if done promptly. The pro-rata rule applies if you have existing pre-tax Traditional IRA balances: consult a tax professional before executing a Backdoor Roth.
Methodology
FiscalCalc's Traditional IRA calculator uses the standard future value annuity formula, compounding annually. The after-tax value applies the stated retirement tax rate to the full projected balance, modeling a single lump-sum withdrawal — actual RMD-driven distributions occur over many years and may result in different effective tax rates depending on your income in each year. The tax deduction benefit multiplies total contributions by the current marginal rate — actual deductibility depends on income and plan participation (see IRS Publication 590-A). All calculations run client-side in your browser. 2025 contribution limits and deduction phase-out ranges sourced from IRS Publication 590-A. Last updated: May 2026.