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 read

What 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 read

Invoice 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 read

How 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 read

Invoice 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 read

Proforma 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 read

Recurring 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 read

VAT 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 read

Credit 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 read

10 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 read

Run Your Freelance Business Like a Pro

Invoices, receipts, and proposals — all in one place. Free to start, no credit card required.

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