How to Invoice as a Freelancer: The Complete Guide

Short answer: To invoice as a freelancer, create a document that lists your business name, the client’s name, a unique invoice number, an itemized description of the work, the total amount due, payment terms (such as Net 15), and how to pay. Save it as a PDF, send it by email or a share sheet, and record the payment when it arrives. A dedicated invoicing app like Keel can build a professional invoice in under a minute and track what is still outstanding.

Invoicing is the part of freelancing that turns finished work into actual money in your bank account. Do it well and you get paid on time; do it sloppily and you spend weeks chasing clients. This guide walks through the entire process, from your first invoice to handling late payers, whether you work in the United States, Canada, the United Kingdom, or the EU.

What is a freelance invoice?

A freelance invoice is a formal request for payment that a self-employed person sends to a client after (or sometimes before) work is delivered. It is a legal and accounting document, not just a friendly note. An invoice creates a record that a specific amount is owed by a specific date.

In the US, freelancers are usually taxed as sole proprietors or single-member LLCs and may receive a Form 1099-NEC from clients who pay them $600 or more in a year. In the UK, a freelancer often operates as a “sole trader.” The invoice itself looks similar everywhere, but tax identifiers and VAT rules differ by region.

What information goes on a freelance invoice?

Every professional invoice should contain the same core fields. Missing one of these is the most common reason payments get delayed.

Field	What to include	Why it matters
Your business name and contact	Legal or trading name, email, phone, address	Tells the client who to pay
Client details	Company name, contact person, billing address	Ensures it reaches the right desk
Invoice number	A unique reference (e.g., INV-0007)	Keeps your records and theirs organized
Invoice date	The date you issue it	Starts the payment clock
Due date	When payment is expected	Sets a clear deadline
Itemized services	Description, quantity, rate, line total	Justifies the amount and prevents disputes
Subtotal, tax, total	Sum before tax, any sales tax/VAT, grand total	Shows exactly what is owed
Payment instructions	Bank transfer, check, PayPal, etc.	Removes friction so the client can pay
Payment terms	Net 15, Net 30, deposit required	Manages expectations

UK and EU note: If you are VAT-registered, your invoice must show your VAT number, the VAT rate applied, and the VAT amount. Sole traders below the VAT threshold do not charge VAT but should state that clearly if a client asks.

How do I create my first invoice, step by step?

Follow these steps to produce a clean, professional invoice.

1. Choose a tool. Options include a word processor template, a spreadsheet, or a dedicated invoicing app. An app reduces errors and remembers your details.
2. Add your branding and contact details. A simple logo and consistent formatting make you look established.
3. Enter the client’s information. Confirm the correct billing contact before you send.
4. Assign a unique invoice number. Sequential numbering (INV-0001, INV-0002) is simplest.
5. Itemize the work. List each service or deliverable with its rate. Break down hourly and fixed-fee work separately.
6. Add taxes if required. Apply sales tax, GST, or VAT based on your location and registration status.
7. State payment terms and methods. Tell the client exactly how and when to pay.
8. Export as a PDF. PDF is the universal standard; it cannot be accidentally edited and looks the same on every device.
9. Send it and log it. Email the PDF or share it, then record it as outstanding so you can follow up.

What payment terms should freelancers use?

Payment terms tell the client how long they have to pay. Choosing the right one balances your cash flow against what clients will accept.

• Due on receipt: Payment is expected immediately. Best for small jobs or new clients.
• Net 7 or Net 14: Payment is due within 7 or 14 days. Common for freelancers who need steady cash flow.
• Net 30: Payment is due within 30 days. Standard for larger companies and agencies.
• Deposit or milestone: Collect a percentage upfront (often 25–50%) and the rest on delivery. Best for large projects.

A useful fact: shorter payment terms are correlated with faster payment. Many freelancers default to Net 30 because it sounds professional, but Net 14 often gets you paid two weeks sooner with no downside.

How should I send an invoice to a client?

Email remains the most common delivery method, and a PDF attachment is the expected format. On a phone, the fastest route is often the share sheet, which lets you send the PDF directly to email, messaging apps, or cloud storage.

When you send an invoice, include a short, polite message: thank the client, reference the project, state the total and due date, and attach the PDF. Keep a copy for your own records. If you use an app that tracks status, mark the invoice as “sent” so you know when to follow up.

How do freelancers track unpaid invoices?

Tracking outstanding invoices is the difference between getting paid and forgetting a $2,000 job entirely. At minimum, keep a simple list showing each invoice number, client, amount, due date, and status (sent, paid, overdue).

A dedicated app automates this. Keel, for example, tracks what is outstanding, records payments with a tap, and nudges you when an invoice is past due so you can send a reminder. Because Keel stores everything encrypted on your iPhone with no bank connection, no cloud, and no account, your client and revenue data never leaves your device.

How do I handle late payments?

Late payments are common, so build a follow-up routine before you need one.

1. Send a friendly reminder a day or two after the due date. Assume it was an oversight.
2. Follow up firmly at one week overdue, restating the amount and a new deadline.
3. Add a late fee if your terms allowed for one (commonly 1.5% per month), and reference it.
4. Pause work on ongoing projects until the outstanding balance is cleared.
5. Escalate to a formal demand or, for large sums, a collections service or small claims court.

Preventive tip: requiring a deposit and using shorter terms dramatically reduces how often you reach step 4 or 5.

Try Keel for freelance invoicing

If you want to create a professional invoice in under a minute and keep your finances private, try Keel: Invoice Maker & Receipts by Ilura Technology. Keel makes invoices and clean PDFs, captures receipts, tracks mileage, and nudges you when an invoice is overdue — all stored encrypted on your iPhone with no bank link, no cloud, and no account. It is free for up to 3 invoices a month with unlimited receipts and mileage. One honest note: Keel does not process online card payments in-app; it produces professional invoices and displays the payment options you choose.

Download Keel on the App Store: https://apps.apple.com/us/app/keel-invoice-maker-receipts/id6786659713

Frequently asked questions

Do freelancers legally need to send invoices? In most cases yes, at least for record-keeping and tax purposes. Even where an invoice is not strictly mandated, sending one protects you by documenting what was agreed and what is owed.

What is the best format for a freelance invoice? A PDF is the standard. It looks identical on every device, cannot be edited by accident, and is accepted by virtually all clients and accounting systems.

How much should I invoice as a freelancer? Invoice the rate you agreed with the client, whether hourly or a fixed project fee. Always confirm the scope and rate in writing before starting so the invoice matches expectations.

Can I invoice before finishing the work? Yes. Many freelancers invoice a deposit upfront or bill in milestones for larger projects. This improves cash flow and reduces the risk of non-payment.

Do I need to charge sales tax or VAT? It depends on your location and registration. US freelancers may owe sales tax on certain services depending on the state; UK and EU freelancers charge VAT only if registered. Check your local rules or ask a tax professional.

This article is general information, not tax advice. Consult a qualified tax professional.