Freelance Invoice Checklist: What to Include, Payment Terms and Late Fees
A clear invoice gets paid faster than a vague one. This checklist covers what to include, how to word payment terms, and how to handle late fees. It is general business guidance, not legal advice; late-fee rules vary by place, so check local law and put your terms in your contract.
The checklist
Every invoice should have:
- The word Invoice and a unique invoice number (sequential numbering makes records easy to audit)
- Issue date and due date
- Your name or business name, address and contact details
- Client name and billing address (the legal entity that will pay, plus a contact or PO number if they use one)
- Itemized description of work: what, dates or hours, rate or fixed price
- Subtotal, any taxes, and total due, with the currency
- How to pay: bank transfer details, payment link, or accepted methods
- Payment terms in plain words
- Late-fee clause if your contract allows it
- Your tax ID if the client needs it for their records (for US clients this is often a W-9 rather than a number on the invoice)
Payment terms that work
Common choices are "Due on receipt," "Net 15" and "Net 30." Shorter terms improve cash flow. Many freelancers use Net 15 for small clients, or ask for a deposit before starting (often a share of the project fee) and the rest on delivery. Bigger companies may insist on Net 30 or longer; you can price that delay into your rate.
Example wording: Payment due within 15 days of the invoice date. A late fee of 1.5% per month applies to unpaid balances after the due date.
Late fees: what to know
- A late fee only helps if it is in the contract or on the agreed terms before the work and is allowed where you operate. Rules and maximum rates differ by state and country.
- Keep it modest. A rate such as 1 to 1.5 percent per month is common, but check your local rules.
- Use it as leverage, not as income. Many freelancers waive it for a first-time late payment after a polite reminder.
Use our late fee calculator to see what a monthly rate adds to an overdue invoice. For a deeper look at pricing your time, see the hourly rate guide.
A simple follow-up routine
- Before due: a friendly reminder a few days ahead.
- Day after due: a short message with the invoice attached and payment link.
- One week late: a firmer note that references your terms.
- Two to four weeks late: pause new work and escalate according to your contract.
Keep every message polite and factual; written records matter if you ever need to dispute non-payment.
Make it automatic
Invoicing software can number invoices, send reminders and take card or bank payments from one place. FreshBooks and QuickBooks Online both include invoicing; our comparison covers the published pricing.