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401(k) Retirement Calculator

Estimate your retirement savings growth using contributions, employer match, compounding returns, and inflation-adjusted projections with scenario comparison.

Formulas Used

  • Future Value (Compounding):
  • FV = P × (1 + r/n)^(n×t)
  • Employee Contribution:
  • Contribution = Salary × Contribution Rate
  • Employer Match:
  • Match = min(Employee Contribution, Salary × Match %)
  • Inflation Adjustment:
  • Real Value = FV / (1 + inflation)^t
  • Retirement Income:
  • Income = Final Balance × Withdrawal Rate

Retirement Planning Details

  • - 401(k) is a tax-advantaged retirement savings plan.
  • - Contributions grow over time due to compound interest.
  • Compounding:
  • - More frequent compounding → higher returns.
  • - Monthly compounding is most common.
  • Employer Match:
  • - Free money added by employer.
  • - Always try to contribute enough to maximize match.
  • Inflation Impact:
  • - Reduces real purchasing power.
  • - Real balance shows actual value in today’s terms.
  • Withdrawal Strategy:
  • - Common rule: 4% annual withdrawal.
  • - Helps ensure long-term sustainability.
  • Scenario Analysis:
  • - Compare different return rates and contributions.
  • - Helps in better financial decision making.
  • Notes:
  • - Higher contributions → significantly larger retirement fund.
  • - Start early to maximize compounding benefits.
  • - Keep return expectations realistic (5–8% avg).

Projections & History