| Age | Projected Balance | Total Contributed | Growth |
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How to Use This Retirement Calculator
Drag the age sliders to your current age and your target retirement age. Enter your current savings balance and how much you contribute each month. Adjust the annual return rate to reflect your investment strategy — 7% is a common estimate for a diversified stock portfolio over the long term.
The calculator shows your projected balance at retirement, estimated monthly income using the 4% safe withdrawal rate, and a milestone table showing your savings growth at every 5-year mark. If your projected balance exceeds your target, you'll see a green "on track" banner. If not, you can adjust your contributions to see how much more you'd need to save each month.
The Power of Starting Early
Compound growth is exponential, not linear — which means the first dollars you save are worth far more than dollars saved later. A 25-year-old saving $300/month at 7% annually will accumulate roughly $900,000 by age 65. Starting the same habit at 35 yields about $450,000 — exactly half, for the same total monthly contribution. The 10-year head start doubles the outcome.
If you're starting later, the levers you can pull are: increasing monthly contributions, working a few extra years, or targeting a slightly higher return through a more growth-oriented portfolio allocation. Each has tradeoffs the calculator can help you model.
Understanding the 4% Withdrawal Rule
The 4% rule — also called the safe withdrawal rate — is a guideline from the Trinity Study suggesting that withdrawing 4% of your portfolio in year one of retirement (then adjusting for inflation annually) has historically sustained a 30-year retirement without running out of money. For a $1 million portfolio, that's $40,000 per year, or $3,333 per month. You can adjust this rate in the calculator above; a lower rate (e.g., 3%) is more conservative for longer retirements.