12 May 2026 · 6 min read
The Trade Invoice, Done Properly: What Goes on Every Bill
The anatomy of a trade invoice that gets paid: every field that belongs on it, why each one matters, and the details that quietly cause disputes when missing.
A trade invoice has one job: to get you paid without a single follow-up question. Every question a client asks — what's this line, when is this due, how do I pay — is friction, and friction is delay. Here's the full anatomy of an invoice that answers everything in advance, top to bottom.
The header identifies both sides beyond doubt: your business name, contact details and logo; the client's name; and the job address, which in trade work is often different from the billing address — list both when they differ. Add a unique sequential invoice number (required for VAT invoices, sensible for everyone) and two dates: issue date and a specific due date. 'Payment due by 26 May 2026' beats 'net 14' every time, because nobody should have to calculate their own deadline.
The body is the work, and the rule is separation and specificity. Labour and materials on separate lines. Each labour line says what was done and how long it took: 'Replace consumer unit and test circuits — 6 hours'. Each material line names the item, quantity and unit price. Specific lines get approved on first reading; vague ones — 'work carried out' — get set aside for questions, and set aside is where invoices go to die.
The totals section builds transparently: subtotal, then tax on its own line, then the total due. UK VAT-registered businesses must show the VAT rate and amount separately along with their VAT number. UK subcontractors under CIS also show the deduction explicitly — calculated on labour only, at the right rate — so the contractor's records and yours agree at year end. If the domestic reverse charge applies, the invoice says so in words; that's a legal requirement, not a style choice.
Payment instructions get their own visible block near the bottom — never buried in small print. Bank details with the right fields for your country (sort code and account number in the UK), the payment reference set to the invoice number, and any alternative like a PayPal link. The reference detail sounds trivial and isn't: it's what lets you match a payment to a job in one glance instead of an evening.
Then the parts most templates forget. Proof: before-and-after job photos on the invoice turn 'what am I paying for?' into 'fair enough' — especially for work that ends up hidden behind walls and under floors. Sign-off: signatures from both sides with name and date, for jobs where completion was agreed on the spot. Warranty: one line — 'all work guaranteed for 12 months, subject to normal use' — that prevents post-job queries and signals confidence.
Finish with terms and conditions that match your country: late-payment interest wording for business clients, cancellation rights for domestic ones, retention of title on materials if that's how you trade. Editable per-country templates with real statutory references do this properly; a paragraph copied from a forum in 2014 does not.
That's the complete trade invoice: identification, dated deadline, specific separated lines, transparent totals with correct tax, unmissable payment instructions, proof, sign-off, warranty, terms. Build it by hand in a template if you enjoy that — or use an app that assembles all of it from a spoken description of the job and sends it from your own email before you've left the driveway.
