How to Invoice as a Freelancer (And Actually Get Paid)

What every invoice must contain

• The word "Invoice" — a document headed "Statement" is legally something else.
• A unique sequential number. Tax authorities in most countries require an unbroken series.
• Your full name or business name, address and tax registration number if you have one.
• The client’s full legal entity name — the company being billed, not your contact’s name.
• Issue date and a due date as a real calendar date, not "net 30".
• Itemised work with quantity, rate and line total.
• Subtotal, tax and total due, with the currency stated.
• Payment instructions — bank details or a payment link.

Generate one with all of this in about a minute using the invoice generator.

Payment terms, ranked by how fast they get paid

Shorter terms genuinely get paid sooner. If a client demands net 60, that is a financing cost — quote accordingly.

The things that actually delay payment

1. 1Sending it to the wrong person. Accounts payable pays invoices; your project contact usually cannot. Ask who to send it to *before* you finish the work.
2. 2No purchase order number. Corporate finance systems reject PO-less invoices automatically, often without telling anyone.
3. 3Invoicing late. The longer the gap between delivering and asking, the less urgent it feels.
4. 4Vague line items. "Consulting services — $4,000" invites questions. Describe the work in the words the client used when they asked for it.
5. 5Missing your own bank details. More common than it sounds.

The follow-up sequence

Polite, scheduled and unemotional beats angry and sporadic every time.

Always in writing, always attaching the invoice again. "I assume this slipped through — the invoice is attached" gets paid more often than an accusation.

Protecting yourself before the work starts

• Take a deposit. Fifty percent upfront is a normal professional standard, not distrust.
• Put late fees in the contract — commonly 1.5% a month — and reference them on the invoice.
• Agree the scope in writing, including what counts as a revision. Scope creep is unbilled work.
• Retain rights until payment. A clause transferring copyright or deliverables only on full payment is standard and gives you leverage.
• Stop work on non-payment. Continuing to deliver while unpaid teaches the client that the due date is optional.

Tax and record keeping

Charge sales tax, VAT or GST only if you are registered. In the US most services are exempt in most states; the UK, EU and India require registration above a turnover threshold. The sales tax calculator handles US rates if you do need to charge it.

Keep every invoice you issue. The IRS generally expects three years of records, six where income was substantially understated; HMRC requires five years after the filing deadline. A folder per tax year with files named 2026-001-clientname.pdf is enough.

Invoicing across borders? Agree who covers the transfer fees before you invoice, and compare the true cost using the currency converter — banks typically take 2%–5% in the exchange rate itself.