Retirement Calculator
Project your retirement savings and see how long your money will last.
Your Retirement Inputs
Projected Savings at Retirement
$1,588,719
Inflation-Adjusted Value
$564,605
Monthly Income (4% Rule)
$5,296
Years Money Will Last
25+
Savings Growth Over Time
Contributions vs. Investment Growth
How to Use This Calculator
- Enter your current age and planned retirement age.
- Input your current retirement savings — include 401k, IRA, and other accounts.
- Add your monthly contribution — how much you contribute each month in total.
- Set your expected annual return (6–8% is a realistic long-term estimate for a diversified portfolio).
- Set an inflation rate (2–3% is the historical US average). The result shows you the real purchasing power of your savings.
- Read the results: use the Inflation-Adjusted Value for realistic planning.
Formula & Methodology
The calculator uses the future value of a growing annuity formula, compounded monthly:
- P = Current savings (principal)
- r = Monthly interest rate (annual rate ÷ 12)
- n = Total months until retirement
- C = Monthly contribution
The inflation adjustment divides the nominal value by (1 + inflation)^years. Monthly income uses the 4% safe withdrawal rule: annual withdrawal = savings × 4%.
Frequently Asked Questions
How much do I need to retire?▼
A common guideline is the "25× rule": save 25 times your expected annual expenses. If you need $60,000/year, target $1.5M in retirement savings.
What is the 4% rule?▼
The 4% rule (Bengen Rule) states that retirees can withdraw 4% of their portfolio in year one, then adjust for inflation annually, with a high probability of funds lasting 30+ years based on historical returns.
How does inflation reduce retirement savings?▼
Inflation erodes purchasing power. At 3% inflation over 30 years, $1M will feel like only about $412,000 in today's dollars. Always plan using inflation-adjusted figures.
Is 7% annual return realistic?▼
Yes — the US stock market (S&P 500) has returned approximately 10% nominally and 7% after inflation over the long run. For a balanced (60/40) portfolio, 6–7% is a reasonable planning estimate.
Does this include Social Security?▼
No — this calculator projects personal savings only. Social Security benefits can add significant income in retirement; use the SSA's my Social Security tool to estimate your benefit.