Blog
Notes on invoicing
What has to be on a document, what a client's accountant looks for, and the arithmetic that quietly goes wrong. Short pieces, written once and kept correct.
Money3 min read
Why invoice totals drift by a cent
A discount across two tax rates, a currency with three decimals, and a total that is one cent off. Where the cent goes, and why it is not arbitrary.
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Quotes2 min read
From quote to invoice without an argument
A quote binds you to a price and binds the client to nothing. Here is what to put in one so the invoice that follows it is never a surprise.
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Invoicing3 min read
Invoice numbering that survives an audit
Why the sequence matters more than the format, what a gap in it looks like from the outside, and how to restart in January without breaking anything.
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Invoicing3 min read
What actually has to be on an invoice
The fields a client's accountant looks for, the ones a tax inspector looks for, and the handful that get invoices sent back unpaid.
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