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Freelance Guide2026-05-15 Β· 10 min read

How to Invoice as a Freelancer: Step-by-Step Guide (2026)

Most freelancers learn invoicing the hard way β€” late payments, awkward follow-ups, missing fields. This guide shortcuts all of that.

Nobody teaches you how to invoice when you go freelance. You figure it out as you go, and usually that means at least one client who pays late, one invoice forgotten, and one awkward follow-up email. Here's the system that avoids all of that.

1

Set Up Your Invoicing Basics

Your business identity

Use your legal name (sole trader) or company name. Decide this once and be consistent β€” changing names mid-stream causes confusion with clients and tax authorities.

Invoice numbering system

Sequential numbers: INV-001, or year-based like 2026-001. Pick one and stick to it. Never reuse or skip numbers.

Payment terms

Net 14 is good for most freelancers. Net 30 if you work with larger companies. Decide upfront and include it in every proposal β€” not just the invoice.

A bank account for business

Not legally required, but having one makes bookkeeping dramatically easier. Monzo Business, Wise, or Starling are free and quick to open.

2

Create Your First Invoice

Every invoice needs these fields to be legally valid:

  • βœ“Your name/business name and address
  • βœ“Unique sequential invoice number
  • βœ“Invoice date (and supply date if different)
  • βœ“Client name and address
  • βœ“Itemised description of services
  • βœ“Amount per line item and total
  • βœ“VAT amount and rate (if VAT registered)
  • βœ“Payment terms (e.g. Net 30)
  • βœ“Payment details (IBAN/bank account or payment link)

PDF best practice:Send invoices as PDF, not Word docs. They look professional, can't be accidentally edited, and display consistently on all devices.

3

Send the Invoice Professionally

Use a clear subject line

'Invoice #INV-024 β€” [Your Name] β€” Due 14 June 2026' is scannable and puts the due date right in the inbox. Generic subjects like 'Invoice attached' get buried.

Write a brief, professional body

'Please find attached Invoice #INV-024 for [project]. Total due: €1,500. Payment details are included. Let me know if you have any questions.'

Timing matters

Send Tuesday–Thursday, before noon. Monday mornings are buried in weekend backlog. Friday afternoons disappear over the weekend. Tuesday AM gets processed and paid fastest.

4

Follow Up When Payment Is Late

Don't feel awkward. It's your money.Following up professionally isn't aggressive β€” it's expected. Most late payments are just forgotten.

3 days after dueβ€” Gentle

β€œHi [Name], just checking in β€” Invoice #INV-024 was due on [date]. Please let me know if payment has already been sent.”

7 days after dueβ€” Firm but friendly

β€œHi [Name], following up on Invoice #INV-024, now 7 days overdue. Could you confirm when I can expect payment?”

14 days after dueβ€” Urgent

β€œHi [Name], Invoice #INV-024 is now 14 days overdue. Please arrange payment today or let me know if there is an issue.”

5

Automate the Whole Process

Steps 3 and 4 above are exactly what Chaser does automatically. You create the invoice, Chaser:

  • β†’Sends the invoice email with your PDF attached
  • β†’Tracks when the client opens the invoice
  • β†’Sends reminder 1 at day 3 (friendly)
  • β†’Sends reminder 2 at day 7 (firm)
  • β†’Sends reminder 3 at day 14 (urgent)
  • β†’Sends final notice at day 30
  • β†’Includes a Stripe payment link in every email
  • β†’Marks the invoice paid when they pay

Build invoices. Chase automatically. Get paid.

Chaser handles the whole workflow. Free for 3 invoices β€” no card required.

Start free β†’

Frequently Asked Questions

Do I need invoicing software as a freelancer?

Not strictly β€” you can start with a template. But software saves significant time once you have more than 3–4 active clients, and automated reminders alone can recover hundreds in late payments.

When should I send an invoice?

As soon as the work is complete β€” or on a fixed day each month for retainer clients. Don't delay. Every day you wait before sending is a day added to when you get paid.

What currency should I invoice in?

Your local currency is safest for tax purposes. If invoicing international clients, specify clearly who bears the exchange rate risk.

What if a client disputes my invoice?

First, listen β€” sometimes errors happen. If the dispute is invalid, reply with polite evidence of what was delivered and ask for payment by a specific date. Keep all communications in writing.

Should I take a deposit upfront?

For new clients: yes, always. A 30–50% deposit is standard and separates serious clients from tyre-kickers. For established clients it's less critical, but smart for large projects.