How the Three Tools Work
This page combines three related but distinct 401(k) tools. The Projection tab simulates your balance year by year from now until retirement, growing your salary and contributions and compounding annual returns. The Early Withdrawal Cost tab tells you what you'd actually keep if you cashed out before retirement age, after taxes and the federal penalty. The Maximize Employer Match tab tells you the contribution percentage range that gets you every dollar of free employer money without accidentally hitting the annual IRS limit too early in the year.
Understanding Employer Match
A typical match is described as "50% up to 6%" — meaning your employer adds 50 cents for every dollar you contribute, up to a contribution of 6% of your salary. Contribute less than 6% and you're leaving free match money on the table; contribute more than 6% and the extra isn't matched (though it still grows tax-advantaged). Some employers use tiered matches — for example 100% match on the first 3% you contribute, then 50% on the next 2% — which is exactly what the Maximize Match tool's two-tier fields are built to handle.
Early Withdrawal: Taxes and Penalties
Withdrawing from a traditional 401(k) before age 59½ typically triggers two separate costs: ordinary income tax on the full withdrawal (federal, and state/local if applicable), plus a 10% early withdrawal penalty on top. The penalty has well-defined exceptions — the most common being separating from your employer in or after the year you turn 55 (the "Rule of 55"), a qualifying disability, or a handful of other IRS-defined hardship exemptions. Note that the penalty exemptions do not exempt you from ordinary income tax — only from the extra 10%.
Why "Maximize Match" Timing Matters
Here's a scenario people don't expect: someone earning a high salary who contributes an aggressive percentage each paycheck can hit the annual IRS contribution limit as early as October — and every paycheck after that stops contributing entirely for the rest of the year. If your employer calculates match per-paycheck rather than "truing up" at year-end, you can lose several paychecks' worth of free match simply by front-loading your contributions too aggressively. Spreading contributions evenly across all 26 (or however many) paychecks in the year is the safest way to guarantee you capture 100% of the match your employer offers.
2026 IRS Contribution Limits
For 2026, the employee elective deferral limit is $24,500 (age 50+ catch-up contributions add more on top, and a special higher catch-up applies for ages 60–63 under SECURE 2.0). This limit applies to your own contributions only — employer match doesn't count against it, though a separate, higher combined limit applies to employee + employer contributions together. These figures are adjusted for inflation most years, so always check the current IRS figures if you're near the limit.
A Worked Example
Take a 30-year-old earning $60,000, with $10,000 already saved, contributing 6% with a 50%-up-to-6% employer match, expecting 3% annual raises and a 7% average return, retiring at 65. Each year, the employee puts in 6% of that year's (growing) salary, the employer adds half of that same amount, and the combined total compounds. Run those exact numbers through the Projection tab above and the balance lands around $1.17 million at retirement — with employer contributions alone worth well over $100,000 of that total, money that would simply be forfeited by not contributing enough to capture the match.
Required Minimum Distributions
Traditional 401(k) accounts come with Required Minimum Distributions (RMDs) starting at age 73 under current law — the IRS forces you to withdraw (and pay tax on) at least a calculated minimum each year, based on your account balance and a life-expectancy divisor. Roth 401(k)s are exempt from RMDs during the original owner's lifetime as of recent law changes. This calculator's retirement-phase estimate uses a simplified level-withdrawal model rather than the exact RMD table, since RMD amounts shift year to year based on the prior year-end balance.
Frequently Asked Questions
Should I contribute more than my employer match?
Once you've captured the full match, whether to contribute further depends on your other financial priorities — high-interest debt payoff and an emergency fund are usually worth addressing first, but for many people, continuing to contribute toward the annual IRS limit remains one of the most tax-efficient ways to save for retirement.
What happens to my 401(k) if I change jobs?
You generally have four options: leave it with your former employer's plan (if allowed), roll it into your new employer's plan, roll it into an IRA, or cash it out (triggering the taxes and penalties covered in the Early Withdrawal tab). A direct rollover avoids taxes and penalties entirely.
Is a 401(k) loan the same as an early withdrawal?
No — a 401(k) loan is repaid to your own account with interest and doesn't trigger income tax or the 10% penalty as long as it's repaid on schedule, though it does come with its own risks (like the full remaining balance becoming due if you leave your job). This calculator's Early Withdrawal tab is for permanent withdrawals, not loans.
Why does my projected balance assume a fixed return every year?
Real markets don't return a steady percentage every year — this projection uses a constant average rate purely to give a clean, comparable estimate. Actual results will vary, sometimes significantly, especially over shorter time horizons.
Does this calculator account for Roth vs. traditional 401(k)?
The projection shows total balance growth regardless of tax treatment. Traditional contributions reduce your taxable income now and are taxed on withdrawal; Roth contributions are taxed now and grow tax-free. The Early Withdrawal tab specifically models a traditional (pre-tax) account, since Roth withdrawals of contributions are generally not taxed or penalized the same way.
This calculator is provided for educational and estimation purposes only and does not constitute financial or tax advice. Consult a licensed financial advisor or tax professional for guidance specific to your situation.