Financial Calculators
Retirement Calculator
Estimate retirement savings needs and monthly contributions from current age, retirement age, savings, desired income, and return assumptions locally in your browser.
Plan how much to save for retirement.
Enter your current age, target retirement age, current savings, desired annual retirement income, expected investment returns before and during retirement, inflation rate, and life expectancy. The calculator estimates your savings at retirement, the required nest egg using a real return assumption, any shortfall, and the monthly savings needed to close the gap. This private browser estimate assumes steady returns and inflation and does not include taxes, fees, Social Security, pensions, or changing circumstances. It is not financial, investment, or tax advice; your values are not uploaded or stored.
Frequently Asked Questions
Everything you need to know about this tool, how it works, and privacy.
How does the retirement calculator estimate the required nest egg?
It projects your current savings to retirement using the pre-retirement return, then calculates the present value of an annuity for your desired annual income during retirement. The annuity uses a real return (post-retirement return minus inflation) and runs for the number of years from retirement age to life expectancy. The required nest egg is the present value of those inflation-adjusted withdrawals.
What is the real return and why does it matter?
The real return is the post-retirement return minus the inflation rate. It represents the growth of your savings after accounting for the declining purchasing power of money. The calculator uses this real return to determine how large a nest egg you need to sustain inflation-adjusted withdrawals. If the real return is zero or negative, sustainable withdrawals are not possible with this simplified model.
How is the monthly savings needed calculated?
If your projected savings at retirement fall short of the required nest egg, the calculator computes the monthly contribution needed to close the gap using the future value of an ordinary annuity formula with the pre-retirement monthly rate and the number of months until retirement.
What does this calculator not include?
This estimate assumes steady returns and inflation, end-of-period compounding, and no taxes, fees, Social Security, pensions, changing circumstances, or sequence-of-returns risk. It is not financial, investment, or tax advice.
Do my values stay private?
Yes. The calculation and copy action run locally in your browser. CodeASystem does not upload or store the values you enter.