What Should an Invoice Include? Complete Checklist

A well-structured invoice is the difference between getting paid on time and chasing overdue payments for weeks. This guide covers every element that must be on every invoice you send.

1. Your Business Information

At the top of every invoice, include:

• Your full legal name or business name
• Your address (business or personal, if sole trader)
• Phone number or email for invoice-related queries
• Your logo (optional but very effective for professionalism)
• Tax/registration number if applicable (NTN for Pakistan, VAT number for EU)

2. Client Details

• Client's full name or company name
• Client's billing address
• Client's contact name — e.g. "Attention: Accounts Payable"

3. Invoice Number

Every invoice must have a unique invoice number. Use a consistent format:

• INV-001, INV-002 (simple sequential)
• INV-2026-001 (year + sequential)
• INV-CLIENT-001 (client code + sequential)

4. Invoice Date

The date the invoice was issued — usually the date you completed the work or the date you send the invoice.

5. Payment Due Date

One of the most important fields. Without a due date, clients have no urgency to pay. Common payment terms:

• Due on receipt — payment expected immediately
• Net 15 — payment due within 15 days of invoice date
• Net 30 — payment due within 30 days (most common for businesses)

→ Learn more: Invoice payment terms explained

6. Line Items (Services or Products)

The core of every invoice. For each service or product, include:

• Description — be specific. Don't write "web design". Write "Homepage redesign and mobile optimisation."
• Quantity — hours, units, or days
• Unit rate — price per hour, per unit, or per day
• Line total — quantity × rate (auto-calculated on ai-invoicemaker.com)

7. Subtotal

The total before tax or discounts are applied.

8. Tax (GST / VAT / Sales Tax)

If applicable, show your tax rate and calculated tax amount separately. In Pakistan, GST-registered businesses must show the GST percentage and amount on every invoice.

9. Discounts (If Applicable)

If you offer a discount, show it as a line item — e.g., "Loyalty discount (10%): -$50"

10. Total Amount Due

The grand total — after all taxes, discounts, and adjustments. Make it large and clear. This is the number the client needs to pay.

11. Currency

Always state the currency clearly — PKR, USD, GBP, EUR. Never assume your client knows which currency you mean.

12. Payment Instructions

The most overlooked field — and one of the biggest causes of delayed payment. Include:

• Bank account name, bank name, IBAN/account number
• Or a payment link (PayPal, Stripe, JazzCash, etc.)
• The reference to use when making payment (usually the invoice number)

13. Notes or Terms (Optional)

• A thank you message ("Thank you for your business!")
• Late payment policy ("A 2% late fee applies after the due date")
• Project-specific notes

Quick Invoice Checklist

• ☑ Your business name and contact details
• ☑ Client name and address
• ☑ Unique invoice number
• ☑ Invoice date
• ☑ Payment due date
• ☑ Itemised services/products with rates
• ☑ Subtotal, tax, discounts
• ☑ Total amount due (clear and prominent)
• ☑ Currency stated
• ☑ Payment instructions