The short version: An invoice is a bill you send to clients asking them to pay for work you’ve done or goods you’ve supplied. If you’re self employed, you’ll be sending a lot of these.
What needs to be on an invoice?
Your name and contact details, the client’s details, a unique invoice number, the date, a description of what you’re charging for, the amount due, payment terms (like “due within 30 days”), and your bank details so they can actually pay you.
If you’re VAT registered, you also need to show your VAT number and break out the VAT amount.
Does the format matter?
Not really. Word documents, PDFs, even online invoicing tools. As long as it’s clear and contains the right information, it counts. Just avoid anything too unusual that a client’s accounts team might reject.
Why keep copies?
Invoices are part of your business records. You’ll need them to track what you’re owed, chase late payments, and prove your income if HMRC ever asks questions. Keep them organised and backed up.
What about expenses?
Invoices you receive from suppliers are just as important. They prove your business expenses and support your tax deductions.
Need help getting your invoicing and record keeping sorted? We can point you in the right direction.
