An employer 401(k) match is the closest thing to free money in personal finance -- and this calculator makes sure you capture every dollar of it. It starts with your Annual Salary and Your Contribution percentage to get your Annual Contribution, then applies the Employer's Match Rate up to the Employer Match Cap to compute the Employer's Annual Contribution. Add your Current Balance compounding at your Expected Annual Return over your Years to Retirement, plus the future value of all those annual contributions, and you get the Projected Retirement Balance.

Earn $90,000, contribute 10% ($9,000), and your employer matches 50% up to 6% of salary. That match is 50% of $5,400 -- $2,700 of free money yearly, a guaranteed 50% return on those dollars before markets do anything. Over 30 years at 7%, your $9,000 annual contributions grow to about $850,000, and the match adds roughly another $255,000. Contributing below the match cap is voluntarily declining a raise.

## How employer matches actually work

Match formulas look cryptic until you decode one. "50% up to 6%" means the employer adds 50 cents per dollar you contribute, but only on contributions up to 6% of your salary. Contribute the full 6% and you collect the entire match; contribute 3% and you leave half of it on the table. "100% up to 4%" is simpler: dollar-for-dollar on your first 4%. Some plans use tiered formulas like 100% on the first 3% plus 50% on the next 2% -- worth 4% of salary total if you contribute at least 5%.

| Your salary | You contribute | Match formula | Free money per year | |---|---|---|---| | $60,000 | 6% ($3,600) | 50% up to 6% | $1,800 | | $90,000 | 6% ($5,400) | 50% up to 6% | $2,700 | | $90,000 | 10% ($9,000) | 50% up to 6% | $2,700 (capped) | | $120,000 | 5% ($6,000) | 100% up to 5% | $6,000 | | $75,000 | 3% ($2,250) | 100% up to 3% | $2,250 |

Notice the third row: contributing 10% when the cap is 6% earns no extra match. Extra contributions still grow tax-advantaged, but the free-money portion maxes at the cap. Your first job with this calculator is confirming you are at least at the cap -- everything else is optimization.

## The true-up trap: how front-loaders lose free money

Many employers match per paycheck, not per year. That detail quietly punishes aggressive savers. Suppose you earn $130,000 with a 50%-up-to-6% match, and you max out the $24,500 IRS limit by September by contributing heavily early. From October to December you contribute $0 -- and a per-paycheck plan matches $0 those months. You just forfeited a quarter of your annual match, potentially over $1,000 of free money.

Plans with a "true-up" provision fix this by reconciling at year-end and topping up what you missed. Plans without one do not. Before you front-load contributions, check your plan's summary description for the word "true-up." If it is absent, spread contributions evenly across all paychecks -- divide the annual max by your number of pay periods and set that as a flat percentage.

## 2026 IRS limits: the numbers that govern everything

The IRS adjusts 401(k) limits most years. For 2026, the figures are:

| Age in 2026 | Employee limit | With catch-up | Total max | |---|---|---|---| | Under 50 | $24,500 | -- | $24,500 | | 50-59 and 64+ | $24,500 | +$8,000 | $32,500 | | 60-63 (SECURE 2.0 super catch-up) | $24,500 | +$11,250 | $35,750 |

A separate $72,000 cap applies to combined employee-plus-employer contributions (or 100% of compensation if lower). Catch-up contributions can exceed that combined figure. The employer match never counts against your personal $24,500 -- it stacks on top, under the $72,000 ceiling.

What does maxing out cost per paycheck? For 2026:

| Age | Annual max | Per month | Bi-weekly (26 pays) | |---|---|---|---| | Under 50 | $24,500 | $2,042 | $942 | | 50+ | $32,500 | $2,708 | $1,250 |

Seeing $942 per paycheck makes the goal concrete -- and makes it obvious why most people build toward the max gradually rather than jumping there in January.

## How much should you actually contribute?

The hierarchy that financial planners agree on:

1. **Contribute enough to capture the full employer match.** This is non-negotiable -- a 50-100% instant return beats every other use of the dollar. 2. **Build a 3-6 month emergency fund** in a high-yield savings account, in parallel if needed. 3. **Kill high-interest debt** (credit cards first) before raising contributions past the match. 4. **Work toward 15% of gross income** including the employer match. Earn $80,000 with a 3% match ($2,400)? You contribute 12% ($9,600) and the match brings the total to 15%. 5. **Then max the account**, then fund an IRA, then an HSA if eligible, then taxable investing.

The 15% figure is a rule of thumb, not a law -- start earlier and you can save less, start at 45 and you will need more. Someone who saves 15% from age 25 to 65 at 7% replaces roughly their full salary; starting at 35, the same 15% replaces about half. Time is the variable that matters most, which is why the calculator's Years to Retirement input swings the projection so violently.

## The 1% escalation trick

Nobody feels a 1% raise in contributions. Set your plan's automatic escalation -- most providers offer it -- to raise your rate 1% every year or every January. On an $80,000 salary, going from 6% to 7% costs about $67 a month before the tax break softens it further, and you will not notice it leaving. Five quiet years of escalation takes you from 6% to 11%; pair two of those years with raises and you have climbed to 15% painlessly. Behavioral economists call this the "Save More Tomorrow" effect, and it outperforms every budgeting app ever made.

## Roth vs. traditional: the tax-timing decision

Traditional (pre-tax) contributions cut this year's taxable income; you pay tax on withdrawals in retirement. Roth contributions are after-tax now; qualified withdrawals after 59 1/2 are tax-free forever. The framework: young earners in low brackets usually favor Roth -- pay 12% now to avoid 24% later. Peak earners usually favor traditional -- deduct at 32% now, withdraw at a lower effective rate later. Many plans let you split.

Two 2026 wrinkles from SECURE 2.0: workers aged 60-63 get the larger $11,250 catch-up, and high earners -- prior-year FICA wages above $150,000 from the plan's employer -- must make catch-up contributions as Roth (after-tax) rather than pre-tax. One more asymmetry worth knowing: employer matching dollars always land in the pre-tax side of your account, even when your own contributions are Roth. The match will be taxed on withdrawal.

## Vesting: when the match becomes truly yours

Your own contributions are always 100% yours. Employer matches, however, may vest over time. A 3-year cliff means you own $0 of the match if you leave before three years, and 100% after. Graded vesting -- say 20% per year over five years -- hands you ownership in slices. Check your plan's schedule before a job change: leaving at year two of a three-year cliff can vaporize thousands in matched dollars. Some employers, especially smaller ones, offer immediate vesting -- if yours does, that is a genuine perk.

## What happens when you change jobs

You have three good options and one expensive one. Roll the balance into your new employer's plan, roll it into an IRA (usually the most flexible -- wider fund choices, easier management), or leave it where it is if the plan allows and the funds are good. The expensive option is cashing out: the distribution becomes taxable income plus a 10% early-withdrawal penalty if you are under 59 1/2. A $40,000 cash-out at a 22% bracket costs $8,800 in tax plus $4,000 in penalties -- nearly a third of the money gone in one signature. Use a direct rollover (trustee-to-trustee) to avoid withholding headaches entirely.

## Fees: the silent third partner in your account

A 1% annual fee sounds trivial until you compound it. Take a $100,000 balance growing at 7% for 30 years with no new contributions. At a 0.10% expense ratio (typical index fund), it reaches about $740,000. At 1.00% (typical actively managed fund), it reaches about $574,000. The fee -- less than one percentage point -- consumed roughly $165,000, more than the starting balance. This is why the calculator's Expected Annual Return deserves a haircut for your funds' expense ratios, and why index funds dominate 401(k) lineups. Check your plan's fee disclosure once a year; moving from a 0.9% fund to a 0.09% fund is a raise you give yourself.

## 401(k) loans: the option that usually backfires

Most plans let you borrow up to 50% of your vested balance (capped at $50,000), repaying yourself with interest through payroll deductions. It sounds harmless -- you are paying yourself! -- but the borrowed money stops compounding, repayments are made with after-tax dollars that get taxed again on withdrawal, and if you leave the job the loan typically comes due within months. Treat it as an emergency-only lever, never as a down-payment strategy.

## Using this calculator well

The projection is only as honest as its inputs. Set Expected Annual Return to 6-7% for a stock-heavy portfolio -- not the 10% historical average, because inflation and fees take their cut. Enter your Current Balance across all retirement accounts if you want the full picture, or just this plan's balance for a plan-specific view. Then stress-test: drop the return to 5%, add five years of work, raise contributions 2%. The scenario where the number still works is your real plan. Revisit it every January with fresh balances -- retirement math rewards the people who look at it annually, not the ones who set it at 28 and squint at 64.

With the pre-filled defaults — Annual Salary $75,000, contribution 10%, Employer Match Rate 50%, Employer Match Cap 6%, Current Balance $25,000, Years to Retirement 30, Expected Annual Return 7% — the 401k Contribution Calculator returns Your Annual Contribution $7,500.00, Employer Annual Contribution $2,250.00, Total Annual Contribution $9,750.00, Projected Retirement Balance $1,111,299.04. Change any input and those results update instantly, so you can see exactly how each number you enter moves the answer.