Finish the session. The invoice has already gone.

For coaches, trainers, therapists and salons

Price the visit from your own service list and send it before your client reaches the car. Standing appointments invoice themselves, so the repeat work stops eating your evenings.

Where the time actually goes

  • Invoicing a whole week on a Sunday night.
  • Retyping the same standing appointment every month.
  • A quote accepted by WhatsApp, then typed out again as an invoice.
  • Not being sure who has paid without opening the bank app.

How it works

  1. Your services, priced once

    Set up what you offer and what it costs. Building an invoice is then picking from your own list rather than typing a description and working out the VAT again.

  2. Standing appointments bill themselves

    Set an invoice to repeat monthly and SizaBill creates and emails a fresh one with a new number, new dates and the right payment reference. Pause or stop it whenever the arrangement changes.

  3. You can see who has paid

    Record payments, including a partial one, and the dashboard shows what is outstanding and what is overdue without opening anything else.

What you get

  • A reusable service list, so pricing a session is one tap
  • Recurring invoices for standing appointments, with correct numbering each month
  • Quote to invoice in one click, with no retyping
  • Branded PDFs with your logo, banking details and payment links on the document
  • Outstanding and overdue totals on your dashboard, filtered by any date range
  • Automatic overdue reminders, so chasing is not a job you have to remember

See it with your own service list

Tell us what you offer and how you invoice today, and we will show you what a week looks like without the Sunday night.