Billable Hours Invoice
Calculator
Results
- Fee subtotal
- 3,000
- Discount amount
- 300
- Net fees after discount
- 2,700
- Invoice total
- 3,050
Legal and admin results
| Fee subtotal | 3,000 |
| Discount amount | 300 |
| Net fees after discount | 2,700 |
| Invoice total | 3,050 |
formula-map diagram
- Fee subtotal
- 3,000
- Discount amount
- 300
- Net fees after discount
- 2,700
- Invoice total
- 3,050
Legal and admin relationship
Formula
Total = hours × rate × (1 − discount%) + expenses= 3000
Note
This is NOT legal advice and NOT a statement of any law. It is generic arithmetic: it applies the displayed formula to the figures you entered, and every rate, fraction, factor, cap and threshold shown is a value YOU supply, not a statutory or court-approved figure. No jurisdiction's rule is built in. Real entitlements, fees, interest, support amounts and deadlines depend entirely on the jurisdiction, the wording of the contract, the day-count and rounding conventions the court applies, and the facts of the case. Use these figures only as a rough arithmetic check and consult a qualified lawyer in the relevant jurisdiction before relying on any number.
More in Legal and admin
See all →Frequently asked questions
How is the invoice total calculated from billable hours?+
The calculator multiplies each recorded time entry by its hourly rate and sums the results, then adds any flat fees or expenses you enter. If different tasks or timekeepers have different rates, keep them as separate line items so each is billed correctly.
Should I round time entries up or track exact minutes?+
Many firms round to the nearest 6-minute (0.1 hour) or 15-minute increment as a billing convention, while others bill exact minutes. The calculator accepts decimal hours, so convert minutes to a decimal (e.g., 45 minutes = 0.75) before entering them.
Does the total include sales tax or VAT?+
No, the base calculation only totals fees for time worked; tax is not automatically applied unless you add it as a separate line or rate adjustment. Check your local rules on whether professional services are taxable before finalizing the invoice.
What if I have a blended rate instead of per-timekeeper rates?+
Enter the blended rate as the hourly rate and total hours as usual; the math is the same, it just averages the value of different staff levels into one number. This simplifies invoicing but hides how much senior versus junior time was spent.
Why does my total differ from what my time-tracking software shows?+
Differences usually come from rounding rules, unbilled or written-off time, or expenses added outside this calculator. Compare each line item against your time log to find the discrepancy rather than assuming the formula is wrong.