US 401(k) Calculator

Project retirement balance with employee contribution, employer match, and long-term growth assumptions.

Retirement Inputs

Retirement Projection

Projected Balance
$2,439,808.99
Your Contributions
$495,700.57
Employer Contributions
$148,710.17
Estimated Growth
$1,750,398.25

4% rule estimate: $97,592.36 per year

4% rule monthly equivalent: $8,132.70

AgeSalaryEmployeeEmployerGrowthBalance
33$90,000.00$9,000.00$2,700.00$3,559.50$60,259.50
34$92,700.00$9,270.00$2,781.00$4,639.95$76,950.45
35$95,481.00$9,548.10$2,864.43$5,820.97$95,183.95
36$98,345.43$9,834.54$2,950.36$7,110.35$115,079.20
37$101,295.79$10,129.58$3,038.87$8,516.44$136,764.10
38$104,334.67$10,433.47$3,130.04$10,048.21$160,375.81
39$107,464.71$10,746.47$3,223.94$11,715.27$186,061.50
40$110,688.65$11,068.86$3,320.66$13,527.94$213,978.96
41$114,009.31$11,400.93$3,420.28$15,497.27$244,297.44
42$117,429.59$11,742.96$3,522.89$17,635.13$277,198.41
43$120,952.47$12,095.25$3,628.57$19,954.22$312,876.45
44$124,581.05$12,458.10$3,737.43$22,468.20$351,540.19
Methodology, assumptions, and source references
Auto-updated on Feb 24, 2026Data snapshot: Sep 13, 2025

Inputs used

  • Age range, current balance, salary, employee contribution %, employer match, return, and salary growth
  • Employer match applies only up to configured match cap percentage

Formula basis

  • Employee contribution = salary × employee contribution %
  • Employer contribution = salary × min(employee %, match cap %) × employer match %
  • Annual growth estimated on opening balance plus half-year contribution timing

Assumptions and limits

  • Contribution limits and catch-up rules are not enforced in this simplified model
  • Returns and salary growth are constant assumptions
  • Investment allocation and plan fees are not separately modeled