How the estimate is worked out
With the starting figures above:
- Hours caught: people × unbilled hours a week × 52 ÷ 12 × the share you would catch. Here 8 × 1 × 4.33 × 50% = 17:20 a month.
- Billed: those hours × your rate. 17:20 at 125.00 is 2,166.67.
- Admin: hours saved × what an hour costs you. 6 × 52.00 = 312.00.
- Tools: what you pay now, less the Sumhour plan for your team size. 140.00 − 79.00 = 61.00.
The number that matters most
For most agencies, unbilled hours outweigh the software bill by a long way, so it is worth checking your estimate. Compare last month’s invoices with what people actually worked on. The utilization calculator shows the same gap from another side.
Questions
How do I work out the ROI of time tracking software?
Add what it brings in or saves each month: billable hours that used to go unbilled, at your rate, plus admin hours saved, at what those hours cost you. Add the difference in software cost. That is the monthly gain.
How many billable hours do agencies lose?
We do not quote an industry figure, because the published ones are hard to check and rarely match one agency. To find yours, compare a month of invoices with what people remember working, or track every hour for two weeks and see what your old method missed.
Why are the results an estimate?
Every input is your own guess. Software does not find billable hours by itself: people still have to log them and clients still have to pay. Treat the result as a way to see which number matters most to you.
Is anything I type saved or sent?
No. The numbers stay in your browser and are worked out on your device.
Check your estimate with real hours. Sumhour’s Uninvoiced report lists billable work that has not reached an invoice. Every plan, 30 days free, no card.
Start free trialMore free tools: agency hourly rate calculator, invoice template.
