401K Calculator

What This Means For You

The Power of the 401(k) Employer Match

If your employer offers a 401(k) match, it adds employer dollars under your plan’s rules. A 50% match on the first 6% of salary means every dollar you contribute (up to 6%) instantly becomes $1.50 — 50% more deposited before market changes and any vesting restrictions. A 100% match on the first 4% adds a dollar per matched dollar, subject to vesting and plan limits.

On an $80,000 salary with a 50% match on 6%: you contribute $4,800/year, your employer adds $2,400, giving you $7,200 invested. If you only contribute 3%, you leave $1,200/year of free money on the table — $36,000+ over a 30-year career before investment growth. Not capturing the full match is literally the most expensive mistake an employee can make.

2026 Contribution Limits

The IRS sets annual limits on 401(k) contributions. For 2026:

Employee contribution: $24,500 (includes both traditional and Roth 401(k) combined).

Catch-up contribution (age 50+): Additional $8,000, for a total of $32,500.

Super catch-up (age 60-63): Additional $11,250 instead of $8,000, for a total of $35,750. This enhanced catch-up applies in the calendar year you reach 60, 61, 62 or 63 if your plan permits it.

Total limit (employee + employer): $72,000 or compensation if lower, excluding catch-up. Eligible standard catch-up can raise the total to $80,000; enhanced age 60–63 catch-up can raise it to $83,250. Annual additions include employer match, profit sharing and non-Roth after-tax deposits; only the match is modeled here.

A flat $24,500 annual employee contribution, $0 initial balance, no employer match, and month-end deposits for 30 years at 7% annual return after fees gives $2,387,632. A flat $10,000/year under the same assumptions gives $974,544. Returns and future contribution limits can change.

Traditional vs Roth 401(k)

Most employers now offer both options. The choice comes down to whether you expect to be in a higher or lower tax bracket in retirement:

Traditional 401(k): Contributions reduce your taxable income today (tax deduction now). Withdrawals in retirement are taxed as ordinary income. Best if you are currently in a high bracket and expect to be in a lower bracket in retirement.

Roth 401(k): Contributions are after-tax (no deduction now). Qualified withdrawals in retirement are tax-free. Best if you are in a lower bracket now and expect to be higher later — or if you want tax diversification in retirement.

Compare your tax situation: Compare current and expected withdrawal tax rates, tax diversification, and plan options. Qualified Roth rules and required Roth catch-up may matter. This nominal balance model does not calculate the after-tax choice.

What Happens When You Leave Your Job

When you change employers, you have four options for your 401(k): leave eligible funds with your former employer if the plan permits, roll it into your new employer's plan, roll it into an IRA, or cash it out. A taxable cash distribution can create income tax and a 10% additional federal tax before age 59½ unless an exception applies. Compare the actual tax cost with eligible rollover options.

Rolling into an IRA typically provides the best investment options and lowest fees. Rolling into a new employer's plan maintains the simplicity of one account. The average worker changes jobs 10+ times — do not leave orphaned 401(k) accounts scattered across old employers. Consolidate with each job change.

Frequently Asked Questions

2026 401(k) Contribution Limits

Your employee deferral limit generally applies across your plans; the annual addition limit applies to plans of the same or related employer. These totals assume sufficient compensation and permitted catch-up; ages 60–63 may reach $35,750 employee and $83,250 including eligible employer additions. A Solo 401(k) needs a separate earned-income and employer-contribution calculation.

Understanding Your Employer Match

Examples of employer match formulas:

Not contributing enough to get the full match is literally leaving free money on the table. Illustration: $2,250/year of additional match in month-end deposits over 30 years at a constant 7% return grows to $219,272. Always contribute at least enough to get the full match — check the plan’s vesting and deposit rules.

How Much Should You Contribute?

Financial planners recommend saving 15% of gross income for retirement, including employer match. Here's a priority framework:

Level 1: Contribute enough to get your full employer match (typically 3-6%). This is the minimum — match is subject to your plan’s formula and vesting.

Level 2: Max out a Roth IRA ($7,500/year). Qualified Roth distributions are tax-free; income and eligibility limits apply.

Level 3: Increase 401(k) to 15% total (including match). This is the recommended target for comfortable retirement.

Level 4: Max out 401(k) ($24,500). For high earners aiming for early retirement or financial independence.

Can't afford 15%? Start with what you can and increase by 1% each year — most people don't notice 1% changes in their paycheck. Going from 6% to 15% over 9 years is painless. Use our Take-Home Pay Calculator to see the actual paycheck impact.

401(k) Impact on Your Paycheck

Pre-tax 401(k) contributions reduce your taxable income, so the actual impact on your paycheck is less than the contribution amount:

At 22% marginal tax bracket. Actual tax savings depend on your specific bracket.

Notice: a $433 biweekly contribution only reduces your paycheck by $338 because you save $95 in taxes. Your $433 goes to your future; your paycheck only drops by $338. That's the power of pre-tax contributions. Read more: How 401(k) Contributions Affect Your Paycheck.

Illustrative 401(k) Balances by Starting Age

Calculated illustrations: $0 initial balance, flat $75,000 salary, 10% employee election, 50% match on the first 6%, 7% annual return after fees, month-end deposits, retirement at 70, 2026 limits held fixed. These are not survey averages or retirement targets.

More contribution years increase both deposits and compounding. Use your actual age and balance in the calculator; risk, fees, inflation and taxes determine what the balance can buy.

Traditional vs. Roth 401(k)

Traditional 401(k): Contributions are pre-tax (reduce your taxable income now). Withdrawals in retirement are taxed as ordinary income. Best if you expect to be in a lower tax bracket in retirement.

Roth 401(k): Contributions are after-tax (no immediate tax savings). Qualified withdrawals in retirement are completely tax-free. Best if you expect to be in the same or higher bracket in retirement.

For a detailed side-by-side comparison with your specific numbers, use our Roth vs Traditional Calculator.

A common strategy: contribute to both. Put enough in traditional 401(k) to get the full employer match, then contribute to a Roth IRA ($7,500 limit) for tax diversification. This gives you both pre-tax and after-tax buckets to draw from in retirement, optimizing your tax bill.

401(k) Mistakes to Avoid

Not contributing enough to get the full match. Leaving $2,000-$5,000/year in employer match on the table is the most expensive mistake. Over 30 years at 7%, that's $200,000-$500,000 lost.

Cashing out when changing jobs. A taxable distribution can create income tax and a 10% additional tax before age 59½ unless an exception applies. Illustration: all $50,000 taxable at a flat 22% federal rate plus an applicable 10% additional tax costs $16,000. Retaining a $50,000 lump sum for 30 years at 7% would reach about $380,613, before withdrawal taxes.

Being too conservative too early. At 30, your money has 35+ years to grow. A 100% bond allocation might feel "safe" but can cost hundreds of thousands in missed growth. Age-appropriate allocation: 100 or 110 minus your age = target stock percentage.

Not increasing contributions with raises. Commit to increasing your 401(k) by 1% every time you get a raise. You won't notice the difference in your paycheck, but the impact compounds enormously.

Ignoring fees. Compare equivalent investment options. A 1.0% expense versus 0.1% on an unchanged $500,000 balance differs by $4,500 for one year, before differences in investment returns. Check our Fee Impact Calculator.

Related 401(k) & Retirement Calculators

Read: 401(k) Employer Match — Free Money You Might Be Missing →

The Complete Guide to Your 401(k) Plan

Whether you searched for a 401k calculator, 401k retirement calculator, 401k contribution calculator, 401k growth calculator, or 401k savings calculator — this comprehensive guide covers everything you need to know about maximizing your employer-sponsored retirement plan. We cover 2026 contribution limits, employer matching strategies, investment selection, Roth vs Traditional 401(k) decisions, fee analysis, loan considerations, and withdrawal rules. This 401(k) guide is also useful as a 401k paycheck impact calculator, 401k match calculator, and 401k balance projection tool.

Your 401(k) is likely your single largest retirement savings vehicle. Your balance depends on deposits, employer contributions, returns, fees and time. The examples below isolate these assumptions; they are calculated scenarios rather than averages or guaranteed retirement outcomes.

Key 401(k) facts for 2026: The employee contribution limit is $24,500 ($32,500 for ages 50–59 and 64+, $35,750 for ages 60–63 under SECURE 2.0). The total combined limit including employer contributions is $72,000. Catch-up totals require plan permission and sufficient compensation; the $72,000 annual addition cap excludes catch-up. Employer match formulas and vesting vary. Review your plan, budget, and retirement goal before choosing an election.

The Optimal 401(k) Contribution Strategy

Financial planners recommend this priority sequence for allocating your savings — and the 401(k) plays a central role at multiple steps:

Step 1: Contribute to your 401(k) up to the full employer match. A 50% match on the first 6% adds employer money if plan conditions are met. On a $75,000 salary, this means contributing $4,500/year to receive $2,250 in free employer money.

Step 2: Consider an IRA ($7,500 base limit in 2026; $1,100 catch-up at age 50+), subject to income, compensation and contribution rules. Qualified Roth withdrawals can be tax-free; compare tax rates instead of choosing by age. Use our Roth IRA Calculator to compare.

Step 3: If eligible for HSA contributions throughout 2026, compare saving up to $4,400 self-only / $8,750 family, including employer deposits. An HDHP alone is not sufficient: other coverage and Medicare affect eligibility. Federal tax treatment covers eligible contributions, earnings and qualified medical withdrawals; state treatment can differ. After age 65, non-medical withdrawals are taxed like a 401(k) but without penalty.

Step 4: Return to your 401(k) and increase contributions toward the $24,500 maximum. At this stage, consider whether Traditional or Roth 401(k) contributions make more sense based on your current tax bracket versus expected retirement bracket.

Step 5: If you have maxed all tax-advantaged accounts and still have money to save, use a taxable brokerage account with low-cost index funds. If your plan allows after-tax 401(k) contributions with in-plan Roth conversions (mega backdoor Roth), this is even better — additional after-tax room depends on employee deferrals, employer deposits and the $72,000 annual addition limit. Conversions have separate tax rules.

401(k) Rollovers: What to Do When You Change Jobs

Changing jobs creates a decision about plan fees, investments, tax treatment and access. Compare these features before moving the balance.

Worked tax illustration: If an entire $50,000 distribution is taxable at a flat 22% federal rate and the 10% additional tax applies, the federal cost is $11,000 + $5,000 = $16,000, leaving $34,000. Exceptions, state tax and tax brackets can change that cost. A retained $50,000 lump sum at a constant 7% for 30 years would reach about $380,613 before future withdrawal taxes; this is not a guaranteed result.

Direct vs indirect rollover: An eligible direct transfer from a pre-tax plan to a compatible pre-tax account can preserve tax deferral without payment to you. A taxable eligible rollover distribution paid to you generally has 20% mandatory federal withholding and a 60-day rollover period; you must replace withheld money to roll over the entire amount. Account types, exceptions and deadlines matter, and a Roth conversion can be taxable.

What to Invest In Your 401(k)

Your 401(k) investment options are limited to your plan's menu — typically 15–30 funds selected by your employer. Here is how to build a strong portfolio from whatever options are available.

The simplest approach: Choose a target-date fund matching your expected retirement year (e.g., "Target 2055 Fund" if you plan to retire around 2055). These automatically rebalance from aggressive to conservative as you age. Expense ratios for target-date funds in 401(k) plans typically range from 0.10% to 0.75%.

The DIY approach: If your plan offers low-cost index funds, build a simple 3-fund portfolio: a total US stock market index fund (60–70%), an international stock index fund (15–25%), and a total bond market index fund (10–20%). Rebalance annually. Look for funds with expense ratios below 0.20% — the fee impact depends on the invested balance, years and investment return.

What to avoid: Company stock (never put more than 5–10% in your employer's stock — your job and retirement should not both depend on one company), high-fee actively managed funds (expense ratios above 1%), and stable value or money market funds for long-term growth (they barely keep pace with inflation).

How Your 401(k) Grows Over Time

Calculated illustrations: flat $75,000 salary, $0 initial balance, month-end deposits, 7% annual return after fees, and 2026 limits held fixed. Employer match is 50% of contributions on the first 6% of pay where shown.

Starting at 25 instead of 35 increases the 6% scenario by $732,425. That includes $45,000 more employee deposits and $22,500 more employer deposits, plus their compounded growth. These examples assume a constant return; actual markets vary.

401(k) Fees: The Silent Wealth Killer

Most 401(k) participants do not realize they are paying fees — but those fees can consume 20–30% of your retirement wealth over a career. The three types of 401(k) fees:

Fund expense ratios (0.03–1.5%): The annual percentage charged by each mutual fund in your plan. A $500,000 balance in a fund charging 1.0% costs $5,000/year — compared to $150/year in a 0.03% index fund. Illustration: $500 in month-end deposits for 30 years, $0 initial balance, gives $574,062 at a 6.9% annual return after fees versus $487,256 at 6.0%, a difference of $86,805. Compare costs alongside investment risk and objectives.

Plan administration fees (0.05–0.50%): Charged by the plan administrator (Fidelity, Vanguard, Empower, etc.) for recordkeeping, compliance, and customer service. These are often deducted quarterly from your balance. Check your quarterly statement — if you see a "plan fee" or "administration fee" line item, this is it.

Individual service fees: Charges for specific actions like taking a loan from your 401(k), hardship withdrawals, or rolling over your balance. These are one-time fees, not recurring, but can be $50–$150 per transaction.

How to check your fees: Your plan is required to provide a fee disclosure document (called a 404(a)(5) notice) annually. Review it every year. If your plan has high fees, lobby HR for better options — employers can negotiate lower fees or switch providers. A switch from a 1.0% average expense ratio to 0.10% can save every participant tens of thousands of dollars over their career.

401(k) Loans: When They Make Sense and When They Don't

Most 401(k) plans allow you to borrow up to 50% of your vested balance or $50,000 (whichever is less). You repay the loan with interest — to yourself — through payroll deductions over 1–5 years.

The appeal: No credit check, no bank approval, relatively low interest rate (typically prime + 1–2%), and the interest you pay goes back into your own account. It can seem like a painless way to access cash.

The hidden cost: While your money is out of the market as a loan, it is not earning investment returns. A $25,000 loan for 3 years misses approximately $6,000–$9,000 in market growth (at 7–10% returns). You are also repaying with after-tax dollars, and when you eventually withdraw in retirement, you will pay taxes again — effectively double-taxing the interest portion.

The biggest risk: Your plan may require repayment after leaving employment. A loan default or loan offset can create a taxable distribution, and an additional 10% tax may apply unless an exception does. A qualified plan loan offset caused by plan termination or employment separation may be eligible for rollover through the federal return due date, including extensions, for that year. The tax depends on the taxable loan balance, your tax rate and whether an additional-tax exception applies.

When it might make sense: As an absolute last resort to avoid high-interest debt (24%+ credit cards) or prevent foreclosure — and only if you are confident you will stay at your current employer for the full repayment period. Never use a 401(k) loan for vacations, cars, or discretionary purchases.

401(k) Withdrawal Rules by Age

SECURE 2.0 emergency withdrawal: For an eligible emergency personal expense distribution, the limit is the lesser of $1,000 or the vested balance exceeding $1,000. The 10% additional tax exception has specific requirements; income tax can still apply. The amount can be repaid within 3 years. This provision acknowledges that rigid early withdrawal rules discourage 401(k) participation among workers concerned about losing access to their savings in an emergency.

The Rule of 55 explained: If you leave your job (voluntarily or involuntarily) during or after the year you turn 55, you can withdraw from that specific employer's 401(k) plan without the 10% early withdrawal penalty. This does not apply to 401(k)s from previous employers or to IRAs. For early retirees planning to stop working between 55 and 59½, keeping funds in the current employer's 401(k) (rather than rolling to an IRA) preserves this penalty-free access. This is one of the most important but least-known retirement planning tools available. Use our Retirement Calculator to model early retirement scenarios incorporating the Rule of 55.

401(k) Glossary

401(k) Plan — An employer-sponsored defined contribution retirement plan that allows employees to save and invest a portion of their paycheck before taxes (Traditional) or after taxes (Roth). Named after Section 401(k) of the Internal Revenue Code.

Employer Match — The contribution your employer makes to your 401(k) based on your own contributions. Common formulas include 50% match up to 6% of salary (you contribute 6%, employer adds 3%) or dollar-for-dollar up to 3%.

Vesting Schedule — The timeline over which you earn full ownership of employer matching contributions. Your own contributions are always 100% vested. Employer matches may vest over 2–6 years (cliff or graded vesting).

Required Minimum Distribution (RMD) — Mandatory annual withdrawals from Traditional 401(k) accounts generally starting at age 73 or 75 for those born in 1960 or later; some workplace-plan deferrals apply. Failure to take RMDs results in a 25% penalty on the amount not withdrawn. Designated Roth 401(k) accounts have no lifetime RMD for the owner; beneficiary rules still apply.

Expense Ratio — The annual fee charged by a mutual fund or ETF, expressed as a percentage of assets. A 0.50% expense ratio on a $100,000 balance costs $500/year. Index funds typically charge 0.03–0.20%; actively managed funds charge 0.50–1.50%.

Target-Date Fund — A mutual fund that automatically adjusts its stock/bond allocation based on a target retirement year. "Target 2050" funds start aggressive and become more conservative as 2050 approaches.

Rule of 55 — An IRS provision allowing penalty-free withdrawals from your current employer's 401(k) if you leave that job at age 55 or older. Does not apply to IRAs or previous employers' plans.

Compound Growth — Investment earnings that generate their own earnings over time. The primary engine of 401(k) wealth accumulation — a $10,000 contribution at age 25 grows to approximately $150,000 by age 65 at 7% annual return.

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