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Finance & money·Payroll Salary

Invoice Hours Calculator

Calculate freelance invoice totals instantly. Enter hourly rate, hours worked, and tax rate to get subtotal, tax amount, and total billed. No sign-up needed.

Added May 6, 2026

Quick examples

Input

Result

Enter a value for hourly rate to see your result.

How it works

Calculates the total invoice amount for hourly work. Enter your rate, hours worked, and applicable tax rate (GST, VAT, or sales tax) to get the subtotal, tax, and final invoice total.

Formula

Invoice Total = Hourly Rate × Hours × (1 + Tax Rate / 100)

Hourly Rate
Your rate per hour of work
Hours
Total hours billed in this invoice
Tax Rate
GST, VAT, or sales tax percentage (0 if not applicable)

Step by step

  1. 01Multiply hourly rate by hours worked to get the subtotal.
  2. 02Calculate tax by multiplying the subtotal by the tax rate percentage.
  3. 03Add the subtotal and tax to get the invoice total.

Examples

$75/hr × 40 hours, no tax

Billing 40 hours at $75/hr gives a $3,000 invoice with no tax added.

Inputs

Hourly rate:
75
Hours worked:
40
Tax / GST / VAT rate:
0

Result

Invoice total:
3000
Subtotal (before tax):
3000
Tax amount:
0

$100/hr × 20 hours, 20% VAT

20 hours at $100/hr = $2,000. With 20% VAT ($400), the client pays $2,400.

Inputs

Hourly rate:
100
Hours worked:
20
Tax / GST / VAT rate:
20

Result

Invoice total:
2400
Subtotal (before tax):
2000
Tax amount:
400
Note: Set tax rate to 0 if you are not VAT/GST registered or if your client is in a different jurisdiction. For US freelancers: sales tax on services varies by state. Many service invoices do not include sales tax. This tool calculates amounts only — it does not generate a PDF invoice.

Related guides

  • How to Calculate GST and VAT

    Learn how to calculate GST (Goods and Services Tax) and VAT (Value Added Tax), add tax to a price, extract tax from a gross amount, and understand.

  • How to Invoice as a Freelancer

    What every freelance invoice needs, how to calculate totals with tax (VAT/GST), when to send invoices, payment terms, and tools to generate professional.

Frequently asked questions

Should I add VAT or GST to my freelance invoice?

It depends on your registration status and jurisdiction. In the UK, you must charge VAT (currently 20%) once your turnover exceeds the VAT threshold. In Australia, you charge GST (10%) if registered. US freelancers generally do not add sales tax on services, though rules vary by state.

How do I track partial hours?

Enter hours as a decimal — for example, 1.5 for 1 hour 30 minutes. The calculator accepts quarters of an hour (0.25 increments) by default.

Can I use this for a project-based invoice?

Yes — just enter your project rate as the hourly rate and 1 as the hours. Alternatively, use the subtotal field mentally as a project price and set the tax rate accordingly.

Does this generate a PDF invoice?

No — this tool only calculates the totals. To generate a formatted PDF invoice, use a tool like Wave, Invoice Ninja, or a Word/Google Docs template.