Money
Retirement savings calculator
Model how current savings and monthly contributions could grow toward a retirement target under your return and inflation assumptions.
- Projected future value
- Inflation-adjusted target gap
- Required monthly contribution estimate
Formula and method
Future value method
FV = current × (1+r)^n + contribution × (((1+r)^n − 1) ÷ r)The calculator compounds current savings and monthly contributions until retirement age.
Required contribution solves the same formula for the monthly amount needed to hit the inflation-adjusted target.
Assumptions
- Returns are constant scenario assumptions.
- Inflation adjusts the target amount.
- Taxes, fees, and contribution limits are not modeled.
Practical examples
Mid-career saver
Age 35, retire at 65, $45,000 saved, $750/month
Projected value and target gapHigher inflation scenario
Same inputs with higher inflation
Target rises and required contribution increasesFAQ
Is this investment advice?
No. It is a math estimate using your assumptions.
Why adjust the target for inflation?
Future dollars may buy less than today's dollars, so the target can be scenario-adjusted.
Are taxes included?
No. This simple calculator does not model taxes, fees, account types, or withdrawal rules.
Can annual return be negative?
Yes, for stress testing, within the supported range.