Investment Growth Calculator

Project investment growth with an initial balance and regular monthly contributions.

JavaScript is required for live calculation.

You can still read how Investment Growth Calculator works, the formula, examples, and FAQs below.

Starting amount
Monthly contribution
Expected annual return
Years

Inputs

Starting amount

Monthly contribution

Expected annual return

Years

Results update when you click Project Investment.

Future value

$548,915

Total contributions$160,000
Investment gains$388,915
Gain on contributions243%

Breakdown

Contributions
Growth

Portfolio growth

BalanceContributions only

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Recently used

Tools you open will show up here on this device — with your last inputs when available.

What this result means

Project investment growth with an initial balance and regular monthly contributions. FV = P(1+r)^n + PMT × ((1+r)^n − 1) / r with monthly compounding.

Assumptions

Rule dependency: Universal formula / market assumptions.

Future value

FV = P(1+r)^n + PMT × ((1+r)^n − 1) / r with monthly compounding.

Example

$10K start + $500/mo at 8% for 25 years → ~$525K future value.

Frequently asked questions

Are returns guaranteed?+

No — this is a projection using a constant average return; actual paths vary.