REVENUE · ROI + PAYBACK
ROI + Payback Period Calculator
See ROI, annualized return, and payback timing before you fund the project.
Result
Cumulative Inflow Curve
Nominal vs discounted inflow over the analysis horizon.
Scenario ROI Spread
Simple ROI by annual-net-benefit scenario.
How to use it
- Enter the initial investment, any upfront benefit, annual net benefit, analysis period, residual value, and discount rate. Use the discount rate as your cost of capital or hurdle rate, typically around 8-15% for many SMB decisions and higher for riskier projects.
- Read simple ROI, annualized ROI, nominal payback, discounted payback, total net gain, and the year-by-year timeline. If discounted payback never happens inside the analysis window, the project may still look good on headline ROI while failing a real capital-allocation test.
- Use nominal payback to judge speed and discounted payback to judge economic quality. A project that pays back in 2 years nominally but misses discounted payback at a 15% hurdle is back-loaded and more fragile than the simple ROI headline suggests.
- Run at least three cases by moving annual net benefit 20% down and 20% up. Approve only if the downside case still meets your minimum return threshold or acceptable payback window, especially when the cash outlay is large relative to monthly free cash flow.
- Re-run when implementation cost, benefit timing, residual value, or cost of capital changes. Compare forecast payback to actual realized savings quarterly so future ROI cases use your real hit rate instead of optimistic assumptions.
Questions people usually ask
What does this calculator include?
It computes simple ROI, annualized ROI, nominal payback period, and discounted payback period from user-defined project cashflows.
How is annualized ROI calculated?
Annualized ROI is computed from total nominal inflow versus initial investment over the analysis period using a compounded annual growth formula.
What is discounted payback?
Discounted payback applies your discount rate to future annual cashflows before checking when cumulative value recovers the initial investment.
Is this tool free and private to use?
Yes. AI Biz Hub tools are free, no-signup browser tools. Inputs stay in your browser unless you choose to share a URL.
Is this professional advice?
No. Outputs are business planning estimates — not legal, tax, or accounting advice.
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