Guide
How to Invoice a Client
Sending your first invoice — or just want to send a cleaner one? Here’s the whole process, from agreeing on the price to following up if it’s late. You can fill one in with the free invoice generator as you read.
Invoicing a client, step by step
An invoice is really just a clear request for payment. Get the details right and it gets paid without a second email. Here’s the order to work through.
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1 Agree on the work and the price before you start
Confirm scope, rate, and payment terms in writing before any work begins. A short email or a signed estimate is enough. This is the single best way to avoid an awkward invoice dispute later.
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2 Gather your details and your client’s details
You’ll need your business name, address, and contact info, plus the client’s legal name, billing address, and the right person to send it to. Sending an invoice to the wrong inbox is the most common reason it sits unpaid.
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3 Give the invoice a unique number
Every invoice needs its own number — INV-001, INV-002, and so on. Sequential numbers keep your records clean, make tax time painless, and look professional to the client.
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4 Itemize the work clearly
List each item with a plain description, quantity, and rate. “Website design — 12 hours @ $90” reads better than a single lump sum. Clear line items get approved faster because the client can see exactly what they’re paying for.
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5 Add tax, totals, and the amount due
Show the subtotal, any tax or discount, and the final total in bold. If you charge sales tax or VAT, include your tax number. Make the amount due impossible to miss.
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6 State your payment terms and how to pay
Spell out the due date (“Net 15” or “Due July 5”), accepted payment methods, and any late fee. Telling the client exactly how to pay — a payment link, bank details, or card — removes the last bit of friction.
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7 Send it and keep a copy
Email the invoice as a PDF with a short, friendly note. Save a copy for your records. Then mark your calendar to follow up if it isn’t paid by the due date.
Want a printable checklist of every field? See what to include on an invoice.
Make the invoice now
Follow the steps above right here. Fill in your details, add line items, and the totals update live — then download a clean PDF. No signup, no email wall.
How to send an invoice so it actually gets paid
Getting paid on time is mostly about removing friction and setting expectations. A few habits make a big difference:
- Send it the day the work is done. The longer you wait, the colder the client’s memory of the value you delivered.
- Attach a PDF, not an editable file. A PDF looks finished and can’t be accidentally changed.
- Make paying a one-click action. A payment link beats “here are my bank details” every time.
- Follow up once it’s overdue. A short, polite nudge on day one past due recovers most late invoices — no awkwardness required.
How long should you give a client to pay?
For most freelancers and small businesses, Net 15 (due 15 days after the invoice date) is a sensible default. Net 30 is common for larger clients with a purchasing process. Whatever you choose, put the exact due date on the invoice — “Net 15” means little to a client who didn’t catch the issue date.
What’s the difference between an invoice and an estimate?
An estimate (or quote) is what you send before the work to propose a price. An invoice is what you send after to request payment. Many jobs start as an estimate, get approved, then become an invoice — and you can build either one here.
Frequently asked questions
Do I legally need to put anything specific on an invoice?
Requirements vary by country, but a complete invoice almost always includes your business details, the client’s details, a unique invoice number, the date, an itemized list, the total due, and your tax number if you charge tax. Our invoice checklist walks through each one.
What should I do if a client doesn’t pay?
Send a friendly reminder the day it’s overdue, then a firmer one a week later referencing your terms and any late fee. Most late payments are simple oversights and clear up with one nudge. If chasing payment is eating your week, Fee-Lion can send those reminders automatically.
Can I just use a template?
Absolutely. Grab a free invoice template if you’d rather start from a layout, or fill one in online with the invoice generator above.