Two practical guides for preparing and checking a small-business invoice. Both use a fictional example so the arithmetic can be followed without exposing a real customer or payment.
Before you send an invoice
Good invoice preparation is mostly a sequence of small checks. Identify the parties, assign a unique number, describe each charge, calculate carefully and make the payment instructions unambiguous.
Available guides
- How to fill out an invoice — the field-by-field structure, including a worked line-item example.
- How to check invoice calculations — a second-pass method for quantities, rates, discounts and totals.
Who these guides are for
Freelancers, consultants and small service businesses preparing a simple invoice. They are general operational guidance, not tax or legal advice. Local rules and client contracts take priority.
What is not available yet
There is no invoice file download, paid template or checkout on this site. The guides are the current, usable resource.
Back to the invoice preparation overview.
Short question, not a full guide? The articles index contains focused pieces on a single record-keeping or review question. The pages in this Guides section remain the longer step-by-step references; the FAQ covers site scope and common questions.