About This Tool
The retirement calculator estimates how much you need to save for a comfortable retirement. It considers your current age, desired retirement age, current savings, monthly contributions, and expected investment returns. You'll see if you're on track or if you need to adjust your savings rate. This tool is essential for anyone planning for retirement, whether you're 25 or 55, to ensure you don't outlive your money.
How It Works
It projects your savings growth to retirement using the future value formula: FV = PV * (1+r)^t + PMT * [((1+r)^t - 1) / r], where PV is current savings, PMT is annual contributions, r is the annual return, and t is years until retirement. It then calculates how long that nest egg will last in retirement using a withdrawal formula: PV_withdrawal = PMT_withdrawal * [1 - (1+r)^(-n)] / r, where n is retirement years.
Examples
- A 30-year-old with $20,000 saved, saving $500 per month, expecting 7% returns, and retiring at 65 will have about $1,020,000.
- A 45-year-old with $150,000 saved, saving $1,000 per month, expecting 6% returns, and retiring at 67 will accumulate roughly $660,000.
Pro Tips
- Factor in Social Security benefits by reducing your needed withdrawal amount—use your estimated benefit from the SSA website.
- Adjust for inflation by using a real rate of return (nominal return minus inflation, e.g., 7% - 3% = 4%).
- Revisit your calculations annually as your salary, savings, and goals change over time.