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401(k) Retirement Calculator

Not maxing your employer match is literally turning down free money. A 50% match on 6% of a $75K salary hands you $2,250/year for nothing. At 7% returns over 35 years, that match alone grows to $340K+. Plug in your salary, contribution rate, and match terms to see your projected balance and the 4% rule monthly income at retirement.

$23,500

2026 Limit

$7,500

Catch-Up (50+)

4.7%

Avg Match

$3,525

Free Money

By SplitGenius TeamUpdated February 2026

Contributing $500/month to your 401(k) starting at age 25 with a 3% employer match and 8% average returns gives you roughly $1.5 million by age 65—that is $2,650/month in retirement income using the 4% rule. Enter your age, contributions, employer match, and expected return below to project your own balance and see the year-by-year growth breakdown.

Your Details

Your age today

When you plan to retire

$

What you have saved so far

$

Gross annual income (for match calculation)

Contributions

$

Your yearly 401(k) contribution (2025 limit: $23,500)

%

Expected annual raise (affects employer match)

Employer Match

%

Percentage your employer matches (e.g. 50%)

%

Max salary % employer will match (e.g. 6%)

Expected Return

%

Average annual investment return before inflation

401(k) Growth Projections

Projected 401(k) balance at age 65 based on monthly contributions at 7% average annual return.

Starting AgeMonthly ContribEmployer MatchBalance at 65
25$500$250$1,424,000
30$500$250$984,000
35$500$250$668,000
40$750$375$579,000
45$1,000$500$489,000
50$1,500$750$394,000

How This Calculator Works

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401(k) Balance Benchmarks by Age

Fidelity recommends saving a multiple of your salary by each age milestone. These benchmarks assume you start saving at 25 and invest 15% of pre-tax income (including employer match) with a mix of stocks and bonds returning 7% annually after inflation.

AgeSavings MultipleAt $60K SalaryAt $85K SalaryAt $120K Salary
301x salary$60,000$85,000$120,000
352x salary$120,000$170,000$240,000
403x salary$180,000$255,000$360,000
454x salary$240,000$340,000$480,000
506x salary$360,000$510,000$720,000
557x salary$420,000$595,000$840,000
608x salary$480,000$680,000$960,000
6710x salary$600,000$850,000$1,200,000

Source: Fidelity Investments retirement savings guidelines. Assumes starting at age 25, saving 15% of pre-tax income (including employer match), and a mix of stocks and bonds.

2025 401(k) Contribution Limits

The IRS adjusts 401(k) contribution limits annually for inflation. For 2025, the employee elective deferral limit is $23,500 for workers under 50. If you are 50 or older, you can contribute an additional $7,500 in catch-up contributions, bringing your total to $31,000. The total combined limit (employee + employer contributions) is $70,000 for those under 50 and $77,500 for 50+.

Limit TypeUnder 5050 and Older
Employee Elective Deferral$23,500$23,500
Catch-Up ContributionN/A$7,500
Total Employee Limit$23,500$31,000
Combined Limit (Employee + Employer)$70,000$77,500

Source: IRS Notice 2024-80. Limits apply to traditional and Roth 401(k) contributions combined. Employer match contributions do not count toward the employee elective deferral limit.

How Employer Match Multiplies Your Savings

An employer match is an instant return on your contribution—no market risk required. The most common formula is 50% match on the first 6% of salary. On a $75,000 salary, contributing 6% ($4,500/year) gets you $2,250 in free employer money. Over 30 years at 8% returns, that match alone grows to over $255,000.

ScenarioNo Match50% Match (up to 6%)100% Match (up to 4%)
Your Annual Contribution$6,000$6,000$6,000
Employer Match (Annual)$0$2,250$3,000
Total Annual Input$6,000$8,250$9,000
Balance After 20 Years (8%)$296,538$407,740$444,808
Balance After 30 Years (8%)$734,075$1,009,353$1,101,113

Assumes $75,000 salary, 8% annual return, monthly compounding, no salary growth. Employee contributes $6,000/year in all scenarios. Match calculations based on $75,000 salary.

The Power of Starting Early: Age Comparison

Compound interest rewards time more than contribution size. Someone who starts at 25 and contributes $500/month ends up with far more than someone who starts at 35 contributing $750/month—even though the late starter puts in more total dollars. Every decade you delay roughly doubles the monthly contribution needed to reach the same goal.

Start AgeMonthly ContributionYears InvestingTotal ContributedBalance at 65 (8%)
25$50040$240,000$1,745,504
30$50035$210,000$1,148,310
35$75030$270,000$1,101,113
40$1,00025$300,000$951,026
45$1,50020$360,000$890,238

Assumes 8% average annual return, monthly compounding, no employer match. The person starting at 25 puts in $240,000 total but ends up with $855,000 more than the person starting at 45 who contributes $360,000. Time beats money.

To explore whether converting some of your 401(k) to a Roth IRA makes sense, try the Roth conversion calculator. For a complete picture of your retirement readiness including Social Security and other income sources, use the retirement calculator.