Invoicing Guide
Whether you're sending your first invoice or managing hundreds a month, this guide covers everything from the basics to advanced invoicing strategies. Learn what to include, how to number them, when to chase payments, and how to stay compliant with UK tax rules.
How to Write an Invoice: Step-by-Step Guide
A clear, step-by-step walkthrough of how to create a professional invoice — from layout and essential details to formatting and sending.
7 min readWhat to Include on an Invoice: 12 Essential Elements
A detailed breakdown of every field your invoice needs — from business details and invoice numbers to line items, VAT, and payment information.
6 min readInvoice Payment Terms Explained: Net 30, Due on Receipt & More
A plain-English guide to invoice payment terms — what they mean, when to use each type, and how to set clear expectations with clients.
6 min readHow to Chase Late Payments: Email Templates & Tips
Step-by-step guidance on chasing overdue invoices, with ready-to-use email templates and escalation strategies that protect your income.
8 min readInvoice Numbering: Best Practices & Systems
How to set up a reliable invoice numbering system — covering sequential, date-based, and project-based approaches, plus HMRC requirements.
5 min readProforma Invoice: What It Is & When to Use One
A clear explanation of proforma invoices — what they are, how they differ from standard invoices, and the situations where they're the right document to send.
5 min readRecurring Invoices: How to Set Up & Automate
How to automate your invoicing for retainer clients and ongoing work — set it up once and get paid consistently without manual effort.
5 min readVAT Invoice Requirements in the UK: Complete Guide
A comprehensive guide to VAT invoice requirements in the UK — covering what HMRC requires, the difference between full and simplified invoices, and common mistakes.
7 min readCredit Notes: What They Are & How to Issue One
Everything you need to know about credit notes — when to issue them, what to include, and how they affect your accounts and VAT.
5 min read10 Common Invoicing Mistakes (And How to Avoid Them)
The 10 most common invoicing mistakes freelancers make — and practical fixes that will get you paid faster and keep HMRC happy.
6 min readHow to Invoice for the First Time
A beginner-friendly guide for freelancers sending their very first invoice, covering preparation, format choices, and what happens next.
7 min readSelf-Employed Invoice Template: What to Include
A practical guide to invoicing as a sole trader, with templates for both non-VAT and VAT-registered freelancers.
7 min readHow to Invoice International Clients from the UK
A practical guide to invoicing overseas clients from the UK, covering currency, VAT, payment methods, and the reverse charge mechanism.
8 min readHow to Create a Deposit Invoice
A guide to requesting and invoicing deposits for freelance projects, including common payment splits and legal standing under UK law.
6 min readHow to Send an Invoice by Email (With Templates)
Practical email templates and tips for sending invoices, including subject line formulas, body copy, and follow-up strategies.
7 min readRun Your Freelance Business Like a Pro
Invoices, receipts, and proposals — all in one place. Join the waitlist for early access when we launch.