The 401k vs IRA Calculator compares retirement savings growth side by side — factoring in employer match, contribution limits, fees, and tax treatment. Find out which account, or combination, maximizes your long-term retirement wealth.
$1,278,691
$1,022,953
$967,658
$967,658
$55,295
$2,250
$1,680
$1,278,691
$1,022,953
$967,658
$967,658
$55,295
$2,250
$1,680
The calculator for 401(k) vs IRA comparison models both retirement vehicles simultaneously, projecting final balances under identical assumptions so you can see exactly how each account performs given your income, tax bracket, employer match, and investment timeline. This is one of the most consequential decisions in personal finance, and the optimal answer depends on factors that vary significantly by individual.
The 401(k)'s defining advantage is the employer match — free money that no IRA can replicate. A 50% match on the first 6% of a USD 70,000 salary adds USD 2,100 annually before any investment return. No IRA equivalent exists. Conversely, IRAs offer unrestricted investment choice — any stock, bond, ETF, or fund available through your brokerage — while 401(k) plans are limited to the menu selected by your employer, which may include high-fee funds. The 401k calculator models the match benefit in isolation.
For 2024, the 401(k) employee contribution limit is USD 23,000 (USD 30,500 with catch-up at age 50+), while the IRA limit is just USD 7,000 (USD 8,000 with catch-up). Combined, an individual can contribute up to USD 30,000 annually across both accounts. The standard priority sequence recommended by most financial planners is:
The standard priority sequence is: contribute to 401k up to the employer match → max out the IRA → return to 401k up to the annual limit.
This sequence captures guaranteed employer match first, then maximizes IRA flexibility, then uses remaining tax-advantaged space in the 401(k). The retirement calculators category covers Roth IRA, pension, and Social Security planning tools.
Investment fees compound just as returns do — but in reverse. A 1% annual fee difference on a USD 500,000 portfolio costs approximately USD 170,000 over 20 years at 7% returns. Many employer 401(k) plans include actively managed funds with expense ratios of 0.5–1.5%, while IRA investors can access index funds at 0.03–0.10%. This calculator allows custom fee inputs for both accounts, making the fee drag visible in the projected balance comparison.
Both 401(k) and IRA accounts offer traditional (pre-tax) and Roth (after-tax) variants. Traditional accounts reduce taxable income now and tax withdrawals in retirement; Roth accounts provide tax-free growth and withdrawals. The optimal choice depends on whether your current marginal tax rate is higher or lower than your expected retirement rate. High earners above Roth IRA income limits (USD 161,000 single / USD 240,000 married for 2024) may consider a backdoor Roth conversion. Use the online calculator to model both traditional and Roth scenarios.
If your employer's 401(k) plan offers only high-fee funds with no match, an IRA may generate a higher net balance over a 30-year horizon simply through lower costs. This calculator makes that comparison explicit. A 401(k) with a 1.2% expense ratio versus an IRA index fund at 0.05% can result in the IRA outperforming despite the 401(k)'s higher contribution ceiling — especially for self-employed individuals or those with long-tenured, high-balance accounts.
For the 401(k): the annual contribution plus employer match is compounded over the investment period, then reduced by the retirement tax rate to get the after-tax value. For the Roth IRA: the annual contribution (capped at $7,000) is compounded over the same period. Since Roth withdrawals are tax-free, the balance IS the after-tax value. The advantage shows which option yields more after-tax retirement wealth.
A positive advantage means the 401(k) (with employer match) provides more after-tax wealth. A negative advantage means the Roth IRA is better. In most cases with an employer match, the 401(k) wins due to the match acting as free money. Without a match, the comparison is purely about tax rates now versus in retirement.
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With moderate match, Roth IRA slightly wins due to tax-free growth.
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100% match on 6% creates a massive 401k advantage.
Always contribute to your 401(k) up to the full employer match first — it is free money. Then max out a Roth IRA ($7,000). If you can save more, go back to the 401(k) up to its $23,000 limit.
An employer match is an immediate guaranteed return. A 50% match = 50% instant return before any market performance. No investment consistently beats free money. Not capturing the full match is literally leaving compensation on the table.
Yes. The contribution limits are separate: $23,000 for 401(k) and $7,000 for IRA in 2024. However, your Traditional IRA tax deduction may be limited if you are also covered by a workplace plan, depending on income.
IRAs generally offer far more investment choices (virtually any stock, bond, ETF, or fund) with lower fees. 401(k) plans are limited to a menu selected by your employer, which may include high-fee funds.
401(k) plans often have higher administrative fees and more expensive fund options. IRA fees depend on where you open the account — discount brokerages like Vanguard, Fidelity, and Schwab offer very low-cost options.
If your employer offers a Roth 401(k), it combines higher contribution limits with Roth tax treatment. However, Roth 401(k)s have RMDs (unlike Roth IRAs) unless rolled into a Roth IRA, and your employer match always goes into the traditional portion.
For most people, yes. Without employment income, taxable income typically drops, pushing you into lower brackets. However, RMDs, Social Security, and pension income can keep rates relatively high for well-funded retirees.
Without an employer match, the 401(k) loses its biggest advantage. A Roth IRA (with better investment choices and no RMDs) may be preferable up to its $7,000 limit, then use the 401(k) for additional tax-deferred savings.
Yes, when you leave your employer. A direct rollover from a traditional 401(k) to a Traditional IRA is tax-free. Rolling into a Roth IRA triggers taxes on the full amount. Many people consolidate old 401(k)s into IRAs for better investment options.
The optimal order: 1) 401(k) up to employer match, 2) Max Roth IRA ($7,000), 3) Max 401(k) ($23,000), 4) HSA if eligible ($4,150 single), 5) Taxable brokerage for additional savings.
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