Project ROI calculator

Weigh a project cost against the benefit it returns, with payback period and a simple net present value at your discount rate.

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ROI70.0%
Payback period1.8 years
Total benefit$102,000.00
Net present value$27,621.30Benefit discounted back to today at your rate
How this is calculated

ROI = (total benefit - cost) / cost. Payback = cost / annual benefit. NPV discounts each year of benefit back to today at your rate and subtracts the cost, so a positive NPV means the project beats simply holding the money.

Frequently asked
Should I use ROI or NPV?

ROI is easier to communicate; NPV is harder to fool. ROI ignores when the money arrives, so a project returning everything in year five looks identical to one returning it next quarter. NPV prices that difference.

What discount rate should I use?

Commonly your cost of capital, or the return you would get from the next best use of the money. Small businesses often use 8 to 12 percent. The rate matters most for long benefit periods.

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