Recurring Savings Calculator
Deposits occur at the end of each month.
Future value = P(1+r)^n + deposit × ((1+r)^n − 1)/r
Estimate savings growth with equal end-of-month deposits and monthly compounding.
Formula
Future value = P(1+r)^n + deposit × ((1+r)^n − 1)/r
Worked example
Starting savings: 1000
Monthly deposit: 100
Nominal annual rate: 5 %
Months: 120
With these inputs, the result is **17,175.2374 **. Deposits occur at the end of each month.
How to use this calculator
- Identify the quantity you want to calculate.
- Enter your measurements in the units shown on each field.
- Read the result, which updates as you change the inputs.
- Check the assumptions below before applying the result.
Assumptions and limits
Assumes a constant nominal annual rate compounded monthly. Returns, taxes, and fees are not guaranteed or included.
Precision and checking
Results are rounded for display. Use the most accurate measurements available, and avoid rounding your inputs unnecessarily. Extra decimal places in a result do not make an estimate more reliable.
To check a result, substitute the same input values into the formula shown above. Change one value at a time to understand how the quantity responds.
Frequently asked questions
What assumptions does this calculation use?
Assumes a constant nominal annual rate compounded monthly. Returns, taxes, and fees are not guaranteed or included.
Are my inputs sent to a server?
No. The calculation runs locally in your browser. The result updates as you edit the inputs.
Sources & references
- Compound Interest Calculator — U.S. Securities and Exchange Commission
