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Free Invoice Generator (PDF)

Free invoice generator for contractors and small businesses. Add line items, tax, and a discount, see a live preview, then download a professional PDF.

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Invoice Generator

No signup required. Your data auto-saves in your browser.

Your Company

Bill To (Client)

Invoice Details

Line Items

Description
Qty
Unit
Price

Tax, Discount & Notes

Your Company Name

123 Main St, City, State ZIP

INVOICE
#INV-001
Issued: ...
Due: ...
Bill To
Client Name
Client Address
DescriptionQtyUnitUnit PriceTotal
Service Call Fee1flat$89.00$89.00
Labor...hrs......
Parts / Materials...ea......
Equipment...ea......
Subtotal$89.00
Total Due$89.00
Notes

Payment due within 30 days. Thank you for your business!

How to make an invoice

  1. 1Add your business details: name, email, phone, and your logo if you have one.
  2. 2Fill in your client's name, email, and billing address.
  3. 3Set the invoice number, issue date, due date, and currency.
  4. 4List each product or service as a line item with a quantity and rate.
  5. 5Add tax or a discount if needed, check the live preview, then download the PDF and send it.

What to include on an invoice

  • The word "Invoice" and a unique invoice number
  • Your business name and contact details
  • Your client's name and billing address
  • Issue date and payment due date
  • A description of each product or service, with quantity and rate
  • Subtotal, any discount or tax, and the total due
  • Payment terms and accepted payment methods

A free invoice template for any trade

This generator doubles as a free invoice template for any trade or service business. Whether you run an HVAC company, an electrical contracting business, a plumbing service, or any other home-service trade, fill in your details and download a professional PDF invoice in seconds. No account required.

HVAC technicians
Electricians
Plumbers
Roofers
Landscapers
General contractors
Pest control
Cleaning services
Appliance repair

Invoice FAQs

What makes an invoice legally valid?

In most places, an invoice is valid when it identifies both parties, describes what was sold, shows the amounts and dates, and carries a unique invoice number. Exact requirements vary by country and industry, especially around tax registration numbers, so check the rules where you operate.

What is the difference between an invoice and a receipt?

An invoice requests payment, a receipt confirms it. You send an invoice before or right after the work is done, and a receipt once the client has actually paid.

How should I number my invoices?

Use a simple sequential format like INV-001, INV-002, and never reuse a number. Some businesses add the year (2026-001) or a client code. What matters is that every invoice gets a unique number, issued in order.

When should I charge tax on an invoice?

It depends on where you operate, what you sell, and whether you are registered to collect tax. Many jurisdictions require sales tax, VAT, or GST once your revenue passes a threshold. When in doubt, confirm with an accountant before adding tax to your invoices.

Create the invoice free. Send it, track it, and get paid with WorkZen

This generator makes the PDF. WorkZen sends the invoice to your client, tracks when it is viewed, takes online payments, and chases the follow-up for you. Free forever plan included.

See WorkZen Pricing