Capex Impact Calculator

A new machine, solar system or delivery vehicle only makes sense if the savings beat the cost. Enter the upfront cost and the yearly savings it creates to see the payback period, lifetime ROI and a proper discounted NPV.

Payback, ROI and NPV for a machine, vehicle or project investment.

Project / equipment cost (PKR)

Expected savings per year (PKR)

Useful lifetime (years)

Discount rate (%)

Net present value (NPV)

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Simple payback period

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Total savings over lifetime

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Net benefit (undiscounted)

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Total ROI

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Enter valid values in every field to see your result. Check for blanks, text in number fields, or a combination that cannot be calculated (shown in the notes under How it works).

How it works

Payback = cost ÷ annual savings. Total ROI = (lifetime savings − cost) ÷ cost. NPV discounts each year’s savings at your discount rate (annuity factor = (1 − (1+r)^-n) ÷ r) and subtracts the upfront cost: a positive NPV means the project beats leaving the money to earn your discount rate elsewhere. Maintenance costs can be netted off the annual savings figure.

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Estimates only — not financial, tax, or professional advice. Figures depend entirely on the values you enter; confirm important decisions with a qualified professional.