CMMS ROI Calculator
Build the business case for maintenance software in two minutes.
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How the CMMS ROI calculation works
A CMMS pays for itself through three main savings:
Downtime savings = downtime hours per year × cost per downtime hour × downtime reduction
Labour savings = technicians × monthly cost × 12 × productivity gain
Spare parts savings = annual spares spend × spares reduction
ROI = (total savings − CMMS cost) ÷ CMMS cost · Payback (months) = CMMS cost ÷ (total savings ÷ 12)
Where each saving comes from
- Less unplanned downtime: PMs run on schedule, early warnings on critical assets, and breakdown causes recorded so repeat failures get fixed.
- More productive technicians: less time hunting for spares, manuals and history; work orders on the phone instead of paper.
- Lower spare parts spend: fewer emergency purchases and less excess stock when parts usage is tracked against each asset.
Choosing honest assumptions
Start conservative. The defaults (20% less downtime, 10% productivity, 10% spares) are deliberately modest first-year assumptions. Finance teams trust a business case more when it still pays back with cautious numbers. Measure the real results after six months and update the model.
Worked example
A plant with 15 technicians at ₹35,000 a month, ₹40 lakh a year of spares, and 240 hours of downtime a year at ₹53,000 an hour, with the default assumptions:
| Saving | Per year |
|---|---|
| Less downtime (240 × ₹53,000 × 20%) | ₹25,44,000 |
| Technician productivity (15 × ₹35,000 × 12 × 10%) | ₹6,30,000 |
| Spare parts (₹40,00,000 × 10%) | ₹4,00,000 |
| Total | ₹35,74,000 |
With an example CMMS cost of ₹6,00,000 a year, payback is about 2 months. Downtime is usually the biggest lever, which is why getting the cost per downtime hour right matters most.