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401(k) Calculator

Project your 401(k) balance at retirement. Calculate employer match, catch-up contributions, and compare Traditional vs Roth 401(k) options.

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How to Use 401(k) Calculator

  1. 1Enter your age and retirement age
  2. 2Set salary and contribution percentage
  3. 3Add employer match details
  4. 4Review projected retirement balance

Frequently Asked Questions

Financial advisors recommend contributing at least enough to get the full employer match (free money), ideally 10-15% of salary including the match.

For 2024, the employee contribution limit is $23,000 ($30,500 if age 50+). The total limit including employer contributions is $69,000 ($76,500 if 50+).

Traditional 401(k) reduces your taxable income now but is taxed in retirement. Roth 401(k) is taxed now but grows and withdraws tax-free. If you expect higher taxes in retirement, Roth may be better.

Using the 401(k) Calculator is simple: visit the tool page, enter your data or input into the provided fields, and get instant results. No downloads, installations, or sign-ups are required. The tool runs directly in your web browser for maximum convenience.

Yes, the 401(k) Calculator is 100% free to use with no limitations. There is no registration required, no daily usage caps, and no hidden fees. You can use it as many times as you need.

The 401(k) Calculator uses industry-standard formulas and algorithms to deliver reliable results. While the tool is designed for accuracy, results should be used as estimates and guidance. For critical decisions, always consult a qualified professional.

Yes, after running your calculation you can copy the results to your clipboard or take a screenshot. The 401(k) Calculator displays a detailed breakdown so you can easily record or share your numbers. No account is required to use or save results.

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About 401(k) Calculator

Project your 401(k) balance at retirement. Calculate employer match, catch-up contributions, and compare Traditional vs Roth 401(k) options.

NexTool's 401(k) Calculator is completely free to use with no sign-up required. Your data is processed directly in your browser and never sent to our servers, ensuring complete privacy and instant results.

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Finance · 9 min readHow to Calculate Your 401(k) Growth: Retirement Savings GuideLearn how to project your 401(k) growth over time using compound interest, employer matching, and contribution limits. Includes formulas, examples, and a free calculator.

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Projected Balance at Age 65
$3,366,394
Monthly retirement income (4% rule): $11,221.31
Your Contributions
$759,087
Employer Match
$154,178
Investment Returns
$2,428,129
Starting Balance
$25,000
Balance Breakdown
Starting: 0.7%
Yours: 22.5%
Match: 4.6%
Returns: 72.1%
Traditional vs Roth 401(k)
Traditional 401(k)
Tax savings now$166,999
Marginal rate now22%
Est. retirement tax22%
Monthly after tax$8,752.62
Roth 401(k)
Tax cost now$166,999
Tax at withdrawal0%
Tax-free growthYes
Monthly after tax$11,221.31
Your current tax rate is at or below the estimated retirement rate. Roth 401(k) may provide greater long-term benefit. This is a simplified comparison. Consult a financial advisor for personalized advice.
Milestone Markers
$100K
Age 34
Year 4
$500K
Age 45
Year 15
$1M
Age 51
Year 21
$2M
Age 59
Year 29
"What If" Scenarios
+1% Contribution
+$156,270
15% to 16% = ~$70.83 less/mo take-home
+2% Annual Return
+$1,820,220
7.0% to 9.0% average return
Retire 2 Years Later
+$568,731
Age 65 to 67 = 2 more years of growth
Small changes compound significantly over 35+ years. These scenarios show the marginal impact of each change independently.
Growth Over Time
Age 31 (Year 1)
Balance: $42,586
Salary: $85,000
Contribution: $12,750
Match: $2,550
Age 32 (Year 2)
Balance: $61,877
Salary: $87,550
Contribution: $13,133
Match: $2,627
Age 33 (Year 3)
Balance: $83,008
Salary: $90,177
Contribution: $13,526
Match: $2,705
Age 34 (Year 4)
Balance: $106,123
Salary: $92,882
Contribution: $13,932
Match: $2,786
Age 35 (Year 5)
Balance: $131,374
Salary: $95,668
Contribution: $14,350
Match: $2,870
Age 36 (Year 6)
Balance: $158,928
Salary: $98,538
Contribution: $14,781
Match: $2,956
Age 37 (Year 7)
Balance: $188,962
Salary: $101,494
Contribution: $15,224
Match: $3,045
Age 38 (Year 8)
Balance: $221,665
Salary: $104,539
Contribution: $15,681
Match: $3,136
Age 39 (Year 9)
Balance: $257,241
Salary: $107,675
Contribution: $16,151
Match: $3,230
Age 40 (Year 10)
Balance: $295,910
Salary: $110,906
Contribution: $16,636
Match: $3,327
Age 41 (Year 11)
Balance: $337,905
Salary: $114,233
Contribution: $17,135
Match: $3,427
Age 42 (Year 12)
Balance: $383,478
Salary: $117,660
Contribution: $17,649
Match: $3,530
Age 43 (Year 13)
Balance: $432,899
Salary: $121,190
Contribution: $18,178
Match: $3,636
Age 44 (Year 14)
Balance: $486,457
Salary: $124,825
Contribution: $18,724
Match: $3,745
Age 45 (Year 15)
Balance: $544,462
Salary: $128,570
Contribution: $19,286
Match: $3,857
Age 46 (Year 16)
Balance: $607,246
Salary: $132,427
Contribution: $19,864
Match: $3,973
Age 47 (Year 17)
Balance: $675,164
Salary: $136,400
Contribution: $20,460
Match: $4,092
Age 48 (Year 18)
Balance: $748,599
Salary: $140,492
Contribution: $21,074
Match: $4,215
Age 49 (Year 19)
Balance: $827,960
Salary: $144,707
Contribution: $21,706
Match: $4,341
Age 50 (Year 20)
Balance: $913,685
Salary: $149,048
Contribution: $22,357
Match: $4,471
Age 51 (Year 21)
Balance: $1,006,244
Salary: $153,519
Contribution: $23,028
Match: $4,606
Age 52 (Year 22)
Balance: $1,106,139
Salary: $158,125
Contribution: $23,719
Match: $4,744
Age 53 (Year 23)
Balance: $1,213,912
Salary: $162,869
Contribution: $24,430
Match: $4,886
Age 54 (Year 24)
Balance: $1,330,138
Salary: $167,755
Contribution: $25,163
Match: $5,033
Age 55 (Year 25)
Balance: $1,455,438
Salary: $172,787
Contribution: $25,918
Match: $5,184
Age 56 (Year 26)
Balance: $1,590,475
Salary: $177,971
Contribution: $26,696
Match: $5,339
Age 57 (Year 27)
Balance: $1,735,959
Salary: $183,310
Contribution: $27,497
Match: $5,499
Age 58 (Year 28)
Balance: $1,892,651
Salary: $188,810
Contribution: $28,321
Match: $5,664
Age 59 (Year 29)
Balance: $2,061,367
Salary: $194,474
Contribution: $29,171
Match: $5,834
Age 60 (Year 30)
Balance: $2,242,980
Salary: $200,308
Contribution: $30,046
Match: $6,009
Age 61 (Year 31)
Balance: $2,437,962
Salary: $206,317
Contribution: $30,500
Match: $6,190
Age 62 (Year 32)
Balance: $2,646,786
Salary: $212,507
Contribution: $30,500
Match: $6,375
Age 63 (Year 33)
Balance: $2,870,424
Salary: $218,882
Contribution: $30,500
Match: $6,566
Age 64 (Year 34)
Balance: $3,109,922
Salary: $225,448
Contribution: $30,500
Match: $6,763
Age 65 (Year 35)
Balance: $3,366,394
Salary: $232,212
Contribution: $30,500
Match: $6,966
31
33
35
37
39
41
43
45
47
49
51
53
55
57
59
61
63
65
Contributions + Match
Investment Returns
$0$1.7M$3.4M
Year-by-Year Projection
AgeSalaryContrib.MatchReturnsBalance
31$85,000$12,750$2,550$2,286$42,586
32$87,550$13,133$2,627$3,533$61,877
33$90,177$13,526$2,705$4,900$83,008
34$92,882$13,932$2,786$6,396$106,123
35$95,668$14,350$2,870$8,031$131,374
36$98,538$14,781$2,956$9,817$158,928
37$101,494$15,224$3,045$11,764$188,962
38$104,539$15,681$3,136$13,886$221,665
39$107,675$16,151$3,230$16,195$257,241
40$110,906$16,636$3,327$18,706$295,910