How your rate is calculated
Your billable hours need to cover a full year's pay and costs. The calculator assumes a five-day working week:
- Working hours: (52 − days off ÷ 5) × weekly hours.
- Billable hours: working hours × billable percentage × number of people.
- Break-even rate: (pay + retirement contributions + business costs) ÷ billable hours.
- Hourly rate: add the markup to break-even, then round up to a multiple of 5.
- Day rate: hourly rate × hours included in a day.
A 20% markup turns a break-even rate of 100 into 120. It is a percentage of costs, not a profit margin on sales.
Use the hours you expect to bill. Dividing by a full working year ignores leave, admin and gaps between clients.


