The ROI formula for lab software
Return on investment compares what the software saves or earns against everything it costs. For a pathology LIS, calculate it over the first 12 months so one-time costs are included.
ROI (%) = (Annual benefit − Annual total cost) ÷ Annual total cost × 100. Payback period = One-time costs ÷ (Monthly benefit − Monthly subscription). A positive ROI means the software more than pays for itself in year one; the payback period tells you how quickly.
Step 1: Capture your baseline before you buy
Spend one normal week measuring how the lab works today. These are the numbers the business case is built on, and the same numbers you will compare against after go-live.
- Reports per day and working days per month
- Average minutes of staff time to enter, format, and print one report
- Cost of paper, toner, and envelopes per printed report
- Share of tests performed but not billed or under-billed (check a sample of registers against invoices)
- Reports corrected or reprinted per week, and the time each takes
- Hours spent on phone calls from patients asking whether reports are ready
Step 2: Turn each gain into rupees
Convert each improvement into a monthly rupee figure. Use your own baseline; the ranges below are typical starting assumptions, not guarantees.
| Gain | How to calculate it | What to measure |
|---|---|---|
| Staff time on reports | Minutes saved per report × reports per month × staff cost per minute | Time per report before and after templates and auto-calculation |
| Printing and delivery | Reports moved to digital delivery × cost per printed report | Share of patients receiving reports on WhatsApp or email |
| Billing leakage | Unbilled tests per month × average test price | Registers or analyzer logs reconciled against invoices |
| Corrections and reprints | Corrections avoided × time per correction × staff cost | Correction count per week |
| Front-desk follow-up calls | Calls avoided × minutes per call × staff cost | Daily call count about report status |
Step 3: Add up the full cost of ownership
Subscription price is only one line. A fair ROI includes everything you will spend in the first year, so compare vendors on total cost, not the monthly headline.
- Monthly or per-report subscription for 12 months
- One-time setup, data migration, and template configuration fees
- Analyzer or instrument interfacing charges, if any
- Staff time for training during the first weeks
- Hardware you need to buy, such as a barcode printer or scanner
- Add-on charges for WhatsApp, SMS, extra users, or extra branches
Worked example: an 80-report-a-day lab
Here is the calculation for an illustrative standalone lab. Every input is an assumption you should replace with your own numbers. The lab runs 80 reports a day for 26 days, about 2,080 reports a month, and staff time costs about ₹100 an hour.
Benefits per month: report entry drops from 4 to 1.5 minutes, saving about 87 staff hours (₹8,700). Moving 60% of reports to digital delivery at ₹3 per printed report saves ₹3,744. Catching half a percent of tests that were going unbilled, at an average of ₹400 per test, recovers ₹4,160. Total monthly benefit: ₹16,604, or about ₹1.99 lakh a year.
Costs in year one: a ₹2,000 monthly subscription (₹24,000 a year), plus ₹10,000 for setup and migration and about ₹1,000 of staff training time. Total first-year cost: ₹35,000.
| Line | Monthly | First year |
|---|---|---|
| Staff time saved | ₹8,700 | ₹1,04,400 |
| Printing saved | ₹3,744 | ₹44,928 |
| Billing leakage recovered | ₹4,160 | ₹49,920 |
| Total benefit | ₹16,604 | ₹1,99,248 |
| Subscription | ₹2,000 | ₹24,000 |
| Setup, migration, training (one-time) | — | ₹11,000 |
| Total cost | — | ₹35,000 |
Reading the result
In this example the first-year ROI is (₹1,99,248 − ₹35,000) ÷ ₹35,000 × 100 ≈ 469%, and the one-time costs are paid back in under a month (₹11,000 ÷ ₹14,604 of monthly net benefit).
Now stress-test it. If every benefit turns out to be only half as large, first-year ROI is still about 185%. If your numbers only work under optimistic assumptions, the case is weak; if they hold up when halved, it is strong. Faster TAT and extra capacity can add revenue too, but keep them out of the base case and treat them as upside.
Track ROI after go-live
Re-measure the same baseline numbers 60 to 90 days after go-live. If results are below plan, the cause is usually adoption (staff still using old registers or manual formats), configuration (templates and price lists not set up fully), or a workflow step that was never moved into the software. Fix those before concluding the software isn't delivering.