Calculator
Project management ROI calculator — Malaysia
Put in what it costs and what it returns. You get ROI, the payback month, NPV at your own discount rate, and the benefit–cost ratio.
Total cost
Up-front plus 36 months of running cost
RM394,000
Total benefit
36 months of benefit
RM1,260,000
Net benefit
Benefit − cost
RM866,000
ROI
Net benefit ÷ total cost
219.8%
Payback period
Up-front cost ÷ monthly net
8.1 months
Net present value (NPV)
Discounted at 8% a year
RM708,680
Benefit–cost ratio (BCR)
Above 1.0 means benefits exceed costs in present-value terms
2.90
NPV discounts annually, so monthly figures are aggregated into years first. Discounting a monthly series at an annual rate is a common and silent error, and it flatters the result.
Four numbers, and what each is actually for
ROI is net benefit divided by total cost. It is the easiest figure to quote and the easiest to game, because it ignores WHEN the money arrives — a project returning 40% over ten years and one returning 40% over ten months look identical.
Payback period fixes that by answering how long until you are whole. It is the number most finance approvers ask for first, and it is the one most project cases leave out.
NPV discounts future money back to today, because a ringgit in three years is worth less than a ringgit now. A positive NPV means the project beats simply leaving the money where it is at your discount rate.
BCR is the present value of benefits over the present value of costs. Above 1.0 the project pays for itself in discounted terms. It is useful for comparing projects of very different sizes, where the raw ringgit figures are not comparable.
Where project ROI cases usually go wrong
The benefit is asserted rather than measured. "Saves two hours a week per person" becomes a large annual figure very quickly, and almost never survives contact with what people actually did with the two hours. If a benefit cannot be seen in a budget line or a headcount plan, treat it as a reason rather than a number.
The running cost is missing. Projects are approved on build cost and live on operating cost — licences, support, the person who now owns the thing. Leaving it out is the single most common way an ROI case overstates itself.
The discount rate is borrowed from nowhere. Use the one your finance function uses; if nobody can tell you, that itself is worth knowing before you present a number that depends on it.
And the comparison is against doing nothing, when the real alternative is usually doing something cheaper. The honest question is rarely "is this worth it" but "is this the best use of the same money".
Questions
›What is a good ROI for a project?
It depends entirely on what else the money could do. A 15% return is excellent if the alternative earns 4% and poor if the alternative earns 25%.
That is why NPV at your own discount rate is the more useful figure: it builds the alternative into the comparison instead of leaving it implicit.
›Should I use NPV or payback period?
Both, because they answer different questions. NPV tells you whether the project creates value; payback tells you how long you are exposed before it does.
Organisations under cash pressure often weight payback more heavily even when NPV is strong, and that is a rational preference rather than a mistake.
›How is NPV calculated here?
Cash flows are aggregated into years and discounted at the annual rate you enter, with the up-front cost taken at time zero.
Monthly figures are rolled into years first on purpose. Discounting a monthly series at an annual rate is a common and silent error, and it flatters the result.
›Can I use this for a training or software business case?
Yes — the arithmetic does not care what the project is. The harder part is the benefit line, and for capability projects that usually means agreeing beforehand what observable thing will change.
If you cannot name the measurement, the case is weaker than the spreadsheet will make it look.
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