What Should Be on an Invoice? Complete Checklist

Whether you're a freelancer billing your first client or a small business owner who's been at it for years, a well-structured invoice is essential. It's not just about getting paid — a professional invoice protects you legally, helps with bookkeeping, and signals to your clients that you take your work seriously.

Here's a complete checklist of what every invoice should include.

1. Your Business Information

At the top of every invoice, include your business details:

• Company or individual name — the legal name you do business under
• Address — your business address or registered address
• Email address — so the client can contact you about the invoice
• Phone number — optional, but helpful for larger clients
• Company logo — optional, but adds a professional touch

If you operate as an LLC, sole proprietor, or corporation, use the name that matches your business registration. This matters for legal and tax purposes.

2. Client Information

Clearly identify who you're billing:

• Client's name or business name
• Client's address
• Contact email — the person or department handling payment

Getting the client name right is especially important if you're billing a company. The invoice should be addressed to the legal entity, not just the person you worked with.

3. Invoice Number

Every invoice needs a unique identifier. This makes it easy to track invoices, reference them in emails, and organize your records. Common formats include:

• Sequential: INV-001, INV-002, INV-003
• Date-based: 2026-02-001
• Client-based: ACME-001, ACME-002

Pick a system that works for you and stick with it. The important thing is that no two invoices share the same number.

4. Dates

Two dates matter on an invoice:

• Issue date: When you sent the invoice
• Due date: When you expect payment

The due date is especially important. Without one, there's no clear expectation of when payment should arrive. Common due date terms include "Due on Receipt," "Net 15," "Net 30," and "Net 60."

5. Line Items

The core of any invoice — a detailed breakdown of what you're charging for:

• Description: What the product or service is
• Quantity: How many units, hours, or items
• Rate: The price per unit or hourly rate
• Amount: Quantity multiplied by rate

Be specific in your descriptions. Instead of "consulting services," write "UI/UX design consultation — homepage redesign." Detailed line items reduce questions and disputes.

6. Subtotal, Discounts, and Tax

Below the line items, include:

• Subtotal: The sum of all line item amounts
• Discount: If applicable — can be a percentage or flat amount
• Tax: Sales tax, VAT, or GST as required by your jurisdiction
• Total: The final amount the client owes

Make the total prominent and easy to find. This is the number your client needs to pay, so it should stand out visually.

7. Payment Terms

Specify when and how you expect to be paid:

• Due date or payment window (e.g., Net 30)
• Accepted payment methods (bank transfer, check, PayPal, etc.)
• Late payment fees if you charge them
• Bank details or payment link if paying by transfer

Clear payment terms eliminate ambiguity and reduce the chance of late payments.

8. Notes

The notes section is a catch-all for anything else:

• A thank-you message
• Specific payment instructions
• Reference to a contract or purchase order number
• A reminder about upcoming work or the next invoice

Keep notes brief and relevant. A simple "Thank you for your business!" goes a long way.

Quick Reference Checklist

• Your business name, address, email, phone
• Company logo (optional but recommended)
• Client's name and address
• Unique invoice number
• Issue date and due date
• Itemized list with descriptions, quantities, rates, and amounts
• Subtotal, discount (if any), tax (if any), total
• Payment terms and accepted methods
• Notes or special instructions

Missing any of these elements can slow down your payments or create confusion with your clients. A complete, professional invoice makes it easy for people to pay you — and that's ultimately what matters.

Related Invoice Guides

• Payment Terms Explained: Net 30, Net 60, and More
• How to Invoice as a Freelancer
• Invoice vs. Receipt: What's the Difference?