IRA Calculator
Calculate your Traditional IRA balance at retirement with tax-deferred compound growth. See exactly how much each contribution actually costs after the tax deduction, and the after-tax value at withdrawal based on your expected retirement tax rate. Includes 2025 IRS contribution limits and deductibility rules.
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How It Works
Traditional IRA contributions may be fully or partially deductible depending on income and workplace plan coverage. The deduction reduces your taxable income immediately, making the effective cost of contributing lower than the face amount.
Net cost = Contribution × (1 - Marginal tax rate)$7,000 × (1 - 22%) = $5,460 actual out-of-pocket costInside a traditional IRA, all dividends, capital gains, and interest compound without annual taxation. This eliminates the performance drag that reduces taxable accounts by 0.3% to 1% per year depending on the portfolio's income characteristics.
IRA FV = Contribution × (1+r)^n$7K/yr for 30yr at 7% = $707,000 before taxAll traditional IRA withdrawals are taxed as ordinary income. The after-tax value equals the account balance multiplied by (1 - withdrawal tax rate). If your retirement rate is lower than your working rate, the traditional IRA wins.
After-tax = Balance × (1 - retirement tax rate)$707,000 × (1 - 15%) = $600,950 after-tax in retirementIf neither spouse has a workplace retirement plan, anyone can fully deduct IRA contributions regardless of income. With a workplace plan, deductibility phases out at higher incomes. Non-deductible contributions still get tax-deferred growth.
Check income vs IRS phase-out thresholds for deductibility2024 single filer with 401k: full deduction below $77K, none above $87KA working spouse can fund an IRA for a non-working spouse, as long as household earned income covers both contributions. This doubles the annual tax-advantaged savings for single-income households.
Spousal IRA = same $7,000 limit, funded from working spouse's income$14,000/yr total ($7K each) from one income earnerTraditional is better when you need the deduction now (high current bracket, expecting lower taxes in retirement). Roth is better when you expect higher taxes in retirement or do not qualify for the deduction. Calculate both for your specific rates.
Traditional better if: current rate > retirement rate32% now → 22% retirement: Traditional saves $10/share of contributionQuick Reference
Common examples — verify instantly above.
$7,000 contribution, 22%
Tax savings (if deductible)
$1,540/yr
$7,000 × 22% deduction
Net out-of-pocket cost
$5,460
$7K/yr, 30yr, 7%
Balance before tax
$707,000
$707K at 15% retirement
After-tax value
$600,950
2025 limit, under 50
IRA contribution max
$7,000/yr
2025 limit, age 50+
With catch-up
$8,000/yr
Deductibility cutoff
Single with workplace plan 2024
Full: <$77K, None: >$87K
Spousal IRA
Both spouses, one income
$14,000/yr combined
Tips & Shortcuts
Contribute to a traditional IRA even if you do not qualify for the deduction — the tax-deferred growth is still valuable and the non-deductible contributions create basis that is tax-free when withdrawn.
Deductible IRA contributions reduce your AGI, which can have cascading benefits including qualifying for other deductions and credits that phase out at higher income levels.
If you have both traditional and Roth IRA funds, strategically withdraw from each in retirement to manage your tax bracket — drawing from traditional when in lower brackets and Roth when rates rise.
Consider the IRA as a flexible supplement to your 401(k). Even if contributions are not deductible, the tax-deferred growth and investment flexibility (versus limited 401(k) fund menus) provide significant value.
Use low-cost broad market index funds inside the IRA to maximize the benefit of tax-deferred compounding. High expense ratios inside tax-advantaged accounts waste the tax benefit.
Convert traditional IRA funds to Roth in low-income years — early retirement before Social Security, years with large deductions, or years with business losses can provide windows for low-tax conversions.
Common Mistakes to Avoid
Assuming you cannot contribute to an IRA because you have a 401(k)
Having a 401(k) only affects IRA deductibility at higher incomes, not eligibility to contribute. Non-deductible IRA contributions are still allowed at any income level and still get tax-deferred growth.
Confusing traditional IRA deductibility with Roth IRA income limits
Traditional IRA income limits apply to deductibility, not contributions. Roth IRA income limits apply to contributions themselves. You can always make a non-deductible traditional IRA contribution regardless of income.
Not keeping track of non-deductible IRA contributions (basis)
Non-deductible contributions are not taxed again when withdrawn. If you do not track your basis using IRS Form 8606, you may pay double tax on those contributions in retirement. Keep all Form 8606s filed.
Withdrawing traditional IRA funds before age 59½ for non-emergencies
Early withdrawals trigger 10% penalty plus ordinary income taxes. At 22% tax rate plus 10% penalty, you lose 32% of the withdrawal immediately. Consider a home equity loan, Roth contribution withdrawal, or personal loan instead.
Missing the IRA contribution deadline by waiting until after Tax Day
IRA contributions for a given tax year can be made until April 15 of the following year. Many people miss the prior year window. Always check whether you can still make last year's contribution before the deadline.
Not converting non-deductible traditional IRA to Roth immediately (pro-rata rule)
If you have pre-tax traditional IRA money, converting non-deductible contributions to Roth triggers the pro-rata rule — you owe taxes proportional to your pre-tax balance. Ideal backdoor Roth requires zero pre-tax traditional IRA balance.
Frequently Asked Questions
Traditional IRA contributions may be tax-deductible now (reducing current taxes), but withdrawals in retirement are taxed as ordinary income. Roth IRA contributions use after-tax money, but all growth and qualified withdrawals are completely tax-free. The choice depends on whether you expect higher taxes now or in retirement.
Yes. Contributing to a 401(k) does not prevent you from contributing to an IRA. However, having a workplace retirement plan (401k, 403b) may reduce or eliminate the traditional IRA tax deduction depending on your income. Roth IRA eligibility is separate from 401(k) participation.
Traditional IRAs require Required Minimum Distributions beginning at age 73 under the SECURE 2.0 Act. RMDs are calculated by dividing the prior year-end balance by an IRS life expectancy factor. Failure to take RMDs triggers a 25% penalty on the missed amount (reduced to 10% if corrected promptly).
Yes, and self-employed individuals have access to additional retirement accounts. A SEP-IRA allows contributions up to 25% of net self-employment income (maximum $69,000 in 2024), significantly more than a standard IRA. SIMPLE IRAs and Solo 401(k)s are also available for the self-employed.
IRAs can hold stocks, bonds, ETFs, mutual funds, CDs, REITs, and even some alternative investments. IRS-prohibited investments include life insurance, collectibles (art, coins, antiques), and S-corp stock. The broad investment flexibility of an IRA is a major advantage over 401(k) plans with limited fund menus.
Basis is the total of non-deductible contributions to a traditional IRA — money you have already paid taxes on. When you withdraw, the portion attributable to basis is not taxed again. Track basis on IRS Form 8606 filed each year you make non-deductible contributions.
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