Retirement Savings Calculator
Project how much you will have at retirement based on savings rate, return, and time horizon.
What Is the Retirement Savings Calculator?
The Retirement Savings Calculator projects how much your retirement portfolio will grow given current savings, regular contributions, and investment returns — and determines whether you are on track to fund your desired retirement lifestyle. It accounts for inflation, contribution growth, and withdrawal planning.
Formula
How to Use
Enter your current retirement savings balance, annual contribution, expected annual return, years until retirement, and desired annual retirement income. The calculator projects your portfolio at retirement and compares it to the amount needed using the 4% safe withdrawal rule.
Example Calculation
Age 35, current savings: $50,000, annual contribution: $10,000, return: 7%, 30 years to retirement. FV = 50,000×(1.07)³⁰ + 10,000×((1.07)³⁰−1)/0.07 = 380,613 + 944,607 = $1,325,220. At 4% withdrawal: $53,009/year in retirement.
Understanding Retirement Savings
Retirement planning is the most important long-term financial planning exercise most people undertake. The mathematics of compound interest means that small amounts invested early grow dramatically over decades — starting at 25 instead of 35 can nearly double your retirement wealth for the same total contributions, purely through additional compounding time.
The two critical variables in retirement planning are the savings rate (how much you contribute as a percentage of income) and the investment return. Both are within your control to a significant degree. Maximizing tax-advantaged accounts (401(k), IRA, Roth IRA) can add 20–30% to effective returns by deferring or eliminating taxes on investment gains.
Sequence of returns risk — the danger that poor market returns early in retirement can permanently impair a portfolio — is the main threat to the 4% rule. Strategies to mitigate it include maintaining a cash buffer (2 years of expenses), dynamic withdrawal rules (reducing withdrawals in bad years), and maintaining some growth exposure throughout retirement rather than switching entirely to bonds.
Frequently Asked Questions
What is the 4% rule?
The 4% rule (Bengen rule) states that retirees can withdraw 4% of their initial portfolio balance each year (adjusted for inflation) with a high probability of not running out of money over 30 years. It is a guideline, not a guarantee.
How much do I need to retire?
A common rule of thumb is 25× your annual expenses (the inverse of the 4% rule). If you need $60,000/year, you need $1,500,000 saved. Social Security and pension income reduce this amount.
What annual return should I assume?
Historically, a diversified stock portfolio returned about 10% nominal or 7% real (inflation-adjusted). Bonds return less. A balanced 60/40 portfolio has historically returned about 8% nominal. Use 6–7% real for conservative planning.
What is dollar-cost averaging?
Dollar-cost averaging (DCA) means investing a fixed amount regularly regardless of market conditions. In down markets you buy more shares; in up markets fewer. This reduces the impact of market timing and is the mechanism behind regular 401(k) contributions.
Is this calculator free?
Yes, completely free with no account required.
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