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How to Calculate Future Value Future value with contributions

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I start with $ and add $ every month to an account earning % per year, compounded monthly, for years…
How much will I have in total?

Incomplete data. Enter all required values to see the calculations.

Answer: After 10 years, You'll have $ . That includes $13000 you put in and $ in compound interest.

Type of calculation: Future value of a starting amount plus regular monthly contributions, with interest compounded monthly.
The formula:
First convert the annual rate to a monthly rate and count the deposits:
  • i = annual rate / 100 / 12 (monthly rate)
  • n = years × 12 (number of months)
FV = P × (1 + i)^n + PMT × ((1 + i)^n − 1) / i
Given: P = $1000, PMT = $100, rate = 5%, years = 10
i = 5 / 100 / 12 = 0.004167
n = 10 × 12 = 120
(1 + i)^n = 1.647009
FV = $1000 × 1.647009 + $100 × (1.647009 − 1) / 0.004167 ≈ $17175.24
Total contributed = P + PMT × n = $1000 + $100 × 120 = $13000
Interest earned = FV − Total contributed = $17175.24 − $13000 ≈ $4175.24
For informational purposes only.

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App updated: August 2026