Free calculator
Hourly rate invoice calculator
Enter the hours you worked and your rate. Add GST if you are registered, and turn the result into an invoice in one click.
1.5 = 1 h 30 min
Your invoice
₹53,100.00
- 37.5 hours × ₹1,200.00
- ₹45,000.00
- GST @ 18%
- ₹8,100.00
- Invoice total
- ₹53,100.00
Working out an hourly invoice
Multiply the hours by your rate: 37.5 hours at ₹1,200 an hour is ₹45,000. Enter part hours as decimals: 1.5 is an hour and a half, 0.25 is fifteen minutes.
If you are registered for GST, add GST at your service’s rate, usually 18% for professional services. If you are not registered, charge no GST and issue a plain invoice.
Make hourly invoices easy to pay
- Show the hours and the rate on the line, not just the total.
- Add the dates or the period the hours cover.
- Use SAC 9983 (or your more specific code) for professional services.
- Keep a timesheet you can share if the client asks.
Last updated 2026-09-30. This calculator is a guide, not tax advice.
Frequently asked questions
How do I bill 45 minutes?
Enter 0.75 hours. Minutes ÷ 60 gives the decimal: 30 minutes is 0.5, 20 minutes is 0.333.
Do freelancers have to charge GST?
Only once you are registered, which is required when your turnover passes the threshold (₹20 lakh for most service providers) and in some other cases, such as many exports of services. Registered exporters can supply under an LUT without charging IGST.
Will my client deduct TDS from an hourly invoice?
Businesses often deduct TDS on professional fees. Use the TDS calculator to see the net amount you will receive.