Payback Period Calculator
Find how many months an investment takes to pay for itself from the monthly gain it brings, and where you stand after a period you choose.
- Free
- No sign-up to try
- Works as you type
Payback period
Payback period
10.0 months
Net gain per month
$2,500
Net position after those months
$65,000
- Net monthly gain = gain per month − running cost per month.
- Payback = upfront investment ÷ net monthly gain.
- Net position = net monthly gain × months − investment.
Free, no sign-up to try. Save it as a live calculator you can share; an estimate from the numbers you enter, not financial advice. Check the result against your own records before you rely on it.
How it works
How the Payback Period Calculator works
- 1
Enter your numbers
Every result updates as you type, with the formula shown under it.
- 2
Check the method
See how each number is worked out and what it assumes.
- 3
Save it as a Room
Share a live calculator: others can change the numbers and see the result update.
Worked example
What it makes
Example inputs
- Upfront investment
- $25,000
- Gain or saving per month
- $3,000
- Running cost per month
- $500
- Months to look ahead
- 36
Results
- Payback period
- 10.0 months
- Net gain per month
- $2,500
- Net position after those months
- $65,000
How it's calculated
- Net monthly gain = gain per month − running cost per month.
- Payback = upfront investment ÷ net monthly gain.
- Net position = net monthly gain × months − investment.
- Assumes: The monthly gain starts straight away and stays the same.
- Assumes: Simple payback ignores the time value of money and anything after the payback date.
An estimate from the numbers you enter, not financial advice. Check the result against your own records before you rely on it.
Who it's for
Who uses it
Managers
Check how quickly a purchase earns back its cost.
Small businesses
Compare two investments on months to payback.
Project sponsors
Set expectations for when a project turns positive.
Good to know
What to consider
- Simple payback ignores the time value of money and anything that happens after the payback date.
- If running costs are at or above the monthly gain, there is no payback: the calculator shows n/a.
Questions
About the Payback Period Calculator
What is a good payback period?
It depends on the risk and how long the benefit lasts. A tool that pays back in a few months is easy to approve; a long payback needs more confidence that the gains will last.
Can I share the calculator with my team or a client?
Yes. The Room keeps the calculator live: anyone with the link can change the numbers and see the result update, with the method and assumptions on the same page.
Make your calculator now
Free, no sign-up to try. It becomes a Room you can edit, publish and share.
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