Retirement Calculator with Savings Goal and Income Gap
Project the future value of current savings and monthly contributions, compare it with a withdrawal-rate portfolio target, and estimate the monthly contribution needed to close any shortfall. Spending is inflated to retirement, outside income is separated, and results are shown in both future and today’s dollars.
Retirement plan assumptions
Retirement projection
Retirement savings and income planning guide
This retirement calculator provides a dedicated calculation workflow rather than a generic converter. A retirement projection depends more on assumptions than on arithmetic. This calculator keeps return, inflation, spending, outside income and withdrawal-rate assumptions separate and editable.
Future value of savings
Current savings grow for the remaining months to retirement. Personal and employer contributions are treated as end-of-month deposits and compounded at the entered annual return converted to a monthly rate.
Inflation-adjusted spending need
Current annual spending is multiplied by the replacement percentage, then increased by projected inflation to the retirement year. The today-dollar equivalent is also shown.
Income gap and required portfolio
The entered Social Security or pension estimate is treated as a current-dollar amount, inflated to retirement, and then subtracted from retirement spending. The remaining annual gap is divided by the planning withdrawal rate to estimate a portfolio target.
Required monthly contribution
When projected savings fall short, the calculator solves the future-value annuity equation for the monthly contribution needed from now until retirement. Employer contributions are credited separately.
Sustainable withdrawal comparison
Projected savings multiplied by the withdrawal rate gives a first-year planning withdrawal. A separate return assumption shows the real-return relationship but does not guarantee portfolio longevity.
Is the withdrawal rate guaranteed to last for life?
No. It is a planning assumption affected by returns, inflation, fees, taxes, longevity and spending changes.
Are contributions assumed at the beginning or end of each month?
They are modeled at the end of each month, a conservative ordinary-annuity convention.
Does the result include taxes?
No. All amounts are gross planning values unless the user enters after-tax spending and income assumptions.