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How to Write an Invoice Free: Invoice Simple Limits vs Jobbit

A Jobbit blog cover for how to write a UK invoice that gets paid

A regular client on a six-session course, a corporate booking for a staff spa afternoon, a mobile visit that needs invoicing the same evening: a studio writes more invoices than a single till receipt suggests. Half of the UK's smallest businesses report being paid late, and a late invoice usually starts as a vague one that leaves out a due date or a clear description of what was done.

Three invoices a studio sends every month

  • A client's course of treatments or membership package, billed monthly.
  • A corporate client's staff spa day or team event, billed once.
  • A mobile therapist's home visit invoice, sent the same evening.

The free options compared

ToolFree limitNumbering and VAT handled?
Invoice Simple3 invoices a monthYes, basic fields
Word or Google Docs templateFree foreverNo, the arithmetic and numbering are manual
Zoho InvoiceFree up to 5 clients, 500 invoices a yearYes, strong VAT handling
JobbitFree plan credits, no monthly invoice countYes, numbered PDF plus editable DOCX

A salon example

Radiance Aesthetics bills one regular client monthly for a course of six facials, plus the occasional retail item such as a box of skincare patches added to the same invoice. Generating the invoice from the free tool takes the arithmetic and the numbering out of the receptionist's hands, so the same layout and business details carry across from one month to the next without retyping anything. When one payment ran two weeks late, the same chat added the statutory late payment wording without anyone looking up the current rate.

Our pick and why

A studio does not need a full accounting package for a handful of monthly invoices; it needs the numbers right, the number sequential and the due date impossible to miss. Jobbit's invoice generator does the arithmetic, keeps the layout for the next invoice, and has no monthly cap to bump into halfway through a busy month. Jobbit is the pick for a studio invoicing regular clients rather than running full bookkeeping, and the nine fields a UK invoice needs, from a unique number to the payment terms, are set out in full in the source guide.

Frequently asked questions

What must a UK invoice include?
The word Invoice, a unique number, your business details, the client's details, a clear description, the dates, the amounts and the payment terms; VAT details too if registered.
How many free invoices does Invoice Simple allow?
Three invoices a month on its free Essentials plan. Jobbit's invoice generator runs on the free plan's daily credits with no monthly invoice count.
Can I add late payment interest to a client's invoice?
Yes, for business customers. UK law allows 8% above the Bank of England base rate, plus a fixed fee of £40, £70 or £100 depending on the debt.

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