A well-structured invoice does two things: it clearly documents what you delivered, and it makes it as easy as possible for your client to pay.
Required invoice fields
Every invoice should include: - Your business name and address (or legal name if sole trader) - Client name and billing address - Invoice number (sequential, never repeated) - Invoice date and due date - Itemised line items with quantity, rate, and line total - Subtotal, discount (if any), tax, and total amount due - Payment instructions (bank details, PayPal, Stripe link) - Late fee policy ("1.5% per month on overdue balances")
Payment terms that reduce late payment
Standard net-30 is too slow for freelancers. More effective: - Net-14 for established clients with good payment history - 50% upfront, 50% on delivery for new clients or large projects - Net-7 with 2% early payment discount — clients who would pay late now pay early - Auto-retry credit card (via Stripe) for recurring retainer clients
Psychological tricks that work
- Use round numbers in your rate and bill to the nearest $5 — easier for AP departments to process
- Include a "Pay Now" button linking to a payment URL — removes friction
- Send within 24 hours of delivery — recency increases payment speed
- Follow up at day 7 before the due date — a friendly reminder, not a chase
Use the invoice total calculator to compute your invoice total with discounts and tax applied correctly.