Back to blog
5 July 2026

How to Invoice Clients as a Personal Trainer in the UK

A straightforward guide to invoicing your PT clients professionally — what to include, how to get paid faster, and the tools that make it effortless.


Why invoicing matters for personal trainers

Most personal trainers are excellent coaches. Very few are natural administrators. The result is a familiar pattern: sessions delivered, payments delayed, invoices forgotten. This guide covers everything you need to invoice your clients properly — without spending hours on paperwork.

What a UK invoice needs to include

If you're not VAT registered (most sole trader PTs aren't), your invoice legally needs:

  • Your name and business name (if different)
  • Your address or contact details
  • A unique invoice number
  • The date of the invoice
  • A clear description of the services provided
  • The total amount owed
  • How the client should pay you

If you are VAT registered, you also need your VAT number and to show the VAT amount separately.

The problem with most invoicing tools

Software like QuickBooks or FreeAgent is built for accountants and bookkeepers. For a personal trainer sending 10-20 invoices a month, it's overkill — complicated to set up, expensive, and rarely used. Most PTs end up either sending a BACS request through their banking app or, worse, just asking clients to pay and hoping they do.

Neither approach is professional. Neither creates a paper trail. And neither gets you paid as reliably as a proper invoice.

A faster way to invoice personal training clients

Cleared is built for exactly this situation. You send a WhatsApp message describing the session — 'Invoice Sarah, 3 PT sessions, £150, sarah@email.com' — and a professional PDF invoice lands in your client's inbox within seconds. Bank transfer details are included. If you're on Cleared Pro, clients can also pay by card or Klarna directly from the invoice.

There's no app to download, no dashboard to log into, and no template to fill in. You work from WhatsApp, where you already spend your day.

How to chase late payments without the awkward conversation

Chasing unpaid invoices is uncomfortable. With Cleared, you ask what's outstanding and then say 'chase Sarah' — a professional payment reminder goes to your client automatically. You stay professional, your client gets a nudge, and you don't have to have the awkward conversation yourself.

Setting up in under a minute

Cleared asks a few quick questions during setup — your name, business name, trade, and email — and you're ready to send invoices. Your first five invoices every month are completely free, with no card required to start.

Frequently asked questions

Do personal trainers need to send invoices?

Yes. A proper invoice protects you legally, creates a record of the transaction, and makes it significantly easier to get paid on time. Clients take payment requests more seriously when they arrive as a formal invoice rather than a casual message.

What's the easiest way to invoice PT clients in the UK?

Cleared lets you send a professional invoice by typing a WhatsApp message. You describe the session, Cleared sends the invoice to your client by email with a PDF attached. There is no app to download and setup takes under a minute.

How do I get personal training clients to pay faster?

Send the invoice immediately after the session, include a clear due date, and make it easy for the client to pay — either bank transfer details or a card payment link. The sooner you send it, the sooner you get paid.

Do I need to be VAT registered to send invoices?

No. Most personal trainers are not VAT registered and do not need to be unless their annual turnover exceeds £90,000. You can send professional invoices as a sole trader without any VAT registration.

What should a personal trainer invoice include?

Your name, your business name if different, a unique invoice number, the date, a description of the sessions or services provided, the total amount, and how the client can pay you. That is everything legally required for a non-VAT registered sole trader.

Ready to try Cleared?

Free for your first 5 invoices every month. No card required.

Start for free on WhatsApp