NexTool

401(k) Calculator

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

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
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

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

How much should I contribute to my 401(k)?▾

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

What is the 401(k) contribution limit?▾

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 vs Roth 401(k) — which is better?▾

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.

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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