Hourly Invoice Calculator
Billing by the hour means multiplying the hours worked by your rate, then adding any tax. Receipt Caker's free hourly invoice calculator does it in one step: enter your hours, your hourly rate and a tax percentage, and it shows the labor subtotal, the tax and the invoice total.
- How do I calculate an hourly invoice?
- Receipt Caker calculates an hourly invoice by multiplying hours by your rate for the labor subtotal, then adding tax: total = hours × rate × (1 + tax ÷ 100). Enter your hours, rate and tax above and the total updates instantly.
- Labor subtotal
- 500.00
- Tax
- 0.00
- Invoice total
- 500.00
Hours times rate, plus tax
Billing by the hour comes down to hours × rate for the labour subtotal, then adding any tax: total = hours × rate × (1 + tax ÷ 100). Six hours at $75 an hour is a $450 subtotal; at 8% tax that is $36, for a $486 total. Receipt Caker's hourly invoice calculator runs the whole chain the moment you enter your hours, rate, and tax percentage.
This is the core of most freelance and service bills, whether you are a consultant, a tradesperson, or a designer. Because the tool updates live, you can try different rates or add contingency hours and see the invoice total shift without touching a spreadsheet.
Billing partial hours correctly
Convert minutes to a decimal fraction of an hour before entering them. Fifteen minutes is 0.25, thirty is 0.5, and forty-five is 0.75, so two hours and thirty minutes is 2.5. Multiplying 2.5 by a $75 rate gives $187.50 — clean, defensible, and easy for a client to check against a timesheet.
Many freelancers round to the nearest quarter-hour to keep records tidy. The calculator accepts decimals directly in the hours field, so you can type 2.5 or 3.75 and it multiplies accurately, producing a labour subtotal you can drop straight onto an invoice.
Should you add tax to your labour?
Whether you charge tax on hourly work depends on your location and registration status. Many freelancers and service providers must add sales tax, VAT, or GST to their labour once they are registered, while those below a threshold or in an exempt category do not. If you are unsure, check your local rules or ask an accountant before invoicing.
The calculator lets you set any tax rate or leave it at zero, so it fits either situation. When you build the final document in the Receipt Caker generator, the tax line is applied to the labour subtotal automatically, matching the figure you produced here.
Turning the figure into a real invoice
Once the total looks right, open the Receipt Caker generator and add a line for the work — either the hours and rate itemised, or a single labour line for the subtotal. Fill in your business details, the client, an invoice number, and the date, and the tool recalculates the total and tax as you type.
You can then export a free watermarked PNG or, on Pro, a watermark-free PDF with your logo — the format most clients expect for an hourly bill. Pair it with the Receipt Caker due date calculator to set clear payment terms on the same document.