What has to be on a UK trade invoice?

A unique invoice number, your business name and address, the customer's name and address, the invoice date, a clear description of the work and parts, the amount due and the payment terms. If you are a sole trader, use your own name plus any trading name; if you are a limited company, include the registered company name and number.

Do I need to show VAT if I am not VAT registered?

No. If you are not registered you must not show a VAT amount or a VAT number at all, and you should not describe any part of the total as VAT. Once registered, you must show your VAT number, the rate applied, the net amount and the VAT amount separately.

How long should my payment terms be?

For domestic work, payment on completion is normal and reasonable. For commercial and landlord customers, 14 days is a good default; 30 days is common but hands the customer a free month of your working capital. State the term on the invoice and on the quote so it is never a surprise.

Can I charge interest on a late invoice?

For business-to-business work in the UK you have a statutory right to claim interest and a fixed recovery charge on late commercial payments. Most trades keep it in reserve as leverage rather than applying it automatically, but stating the right on the invoice quietly encourages people to pay on time.

Invoicing & Payments1 September 2026

Online Invoicing for Tradespeople: The Complete UK Guide

A tradesperson raising an invoice on a phone after finishing a job

Invoicing is the least enjoyable hour of the week for most trade businesses and the one that decides whether the wages clear. Get the document right and get it out the same day, and most customers simply pay. Get it wrong — a missing reference, no VAT breakdown, a vague description of the work — and you have handed the customer a reason to leave it in the pile.

This guide covers what belongs on a UK trade invoice, how to handle VAT, CIS, deposits and stage payments, and how to move the whole job from signed-off to sent before the van leaves the drive.

What every trade invoice must contain

There is a legal minimum, and then there is the practical minimum that stops the customer emailing you back with questions. Aim for both.

The word "Invoice" and a unique, sequential invoice number.
Your trading name, address and contact details — plus company number if you are a limited company.
The customer's name and billing address, and the site address if it differs.
Invoice date and the date the work was carried out.
A plain description of labour, parts and any call-out or minimum charge.
The amount due, the due date and how to pay.
Your bank details, and a payment link if you take cards.

Add the job reference and the engineer's name too. When a property manager is reconciling ten invoices, the one they can match instantly is the one that gets approved first.

A worked invoice layout

Here is the structure that causes the fewest queries on domestic and small commercial work:

Header — your logo, invoice number, invoice date, due date.
Parties — bill-to on the left, site address on the right.
Job summary — one sentence: "Emergency lock replacement, front entrance door, attended 14:20 on 28 August."
Line items — labour hours at your rate, each part on its own line with quantity, then any call-out charge.
Totals — net, VAT (if registered), gross, less any deposit already paid, balance due.
Payment block — bank details, payment link, terms, and your late-payment position.

VAT: registered and not registered

If you are not VAT registered, keep VAT off the document entirely — no VAT line, no VAT number, no "inc. VAT" in the total. If you are registered, show your VAT number, list the net amount, the rate and the VAT amount separately, and remember that the invoice date drives which return the sale lands in.

Construction-sector work between VAT-registered businesses may fall under the domestic reverse charge, where you do not charge VAT but must state on the invoice that the reverse charge applies and that the customer accounts for it. If most of your work is subcontract construction, check your position with your accountant once and then build the correct wording into your invoice template so nobody has to remember it job by job.

Deposits and stage payments

Any job where you are buying materials up front deserves a deposit. It protects your cash and it filters out the enquiries that were never going to proceed.

Small jobs — no deposit, payment on completion, card taken at the door.
Materials-heavy jobs — a deposit covering the parts, invoiced and paid before you order.
Multi-day installations — stage payments tied to visible milestones: materials on site, first fix complete, commissioning and handover.
Contract customers — monthly consolidated invoicing on agreed terms, with a statement rather than a stack of individual bills.

Whatever you choose, say it in the quote. A deposit request that appears for the first time after the customer has accepted feels like a change of terms.

Tryoup builds the invoice from the job itself — labour, parts fitted, photos and the customer's signature — so the document is complete before anyone opens a laptop. If you would like to see it against one of your own jobs, book a demo and we will walk through it.

Payment terms that get honoured

Terms only work when they are visible three times: on the quote, on the invoice and in the reminder. Keep the wording short and unambiguous — "Payment due on completion" or "Payment due within 14 days of invoice date" — and give a due date rather than a duration, because "14 days" invites arithmetic and a due date invites payment.

For commercial customers, ask at quote stage who approves invoices and what reference their system needs. A purchase order number missing from an invoice is one of the most common reasons a payment quietly sits for a month.

Invoice from the van, not from the office

The single biggest improvement most trade businesses can make is not the layout of the invoice — it is the gap between the job finishing and the invoice going out. Every handover in that gap adds a day: the job sheet in the van, the parts nobody wrote down, the price the owner needs to confirm.

When the engineer closes the job on their phone, prices it from your rate card, captures the signature and sends the invoice on the spot, that gap disappears. The customer is still standing in front of the work they have just had done, which is the moment they are most willing to pay.

Keeping the books straight

Never reuse or skip invoice numbers — sequential numbering is what makes an audit painless.
Keep invoices and supporting job records for the retention period your accountant advises.
Credit note rather than delete when something is wrong; deleted invoices leave holes.
Sync invoices and payments to your accounting package so nobody re-keys anything.

A five-minute checklist

Is the invoice number unique and sequential?
Are the customer's billing details and any PO reference correct?
Does the description explain the work to someone who was not there?
Is VAT shown correctly for your registration status?
Is the deposit deducted and the balance obvious?
Is there a due date and a way to pay in one tap?
Did it go out the same day as the job?

Frequently asked questions

What has to be on a UK trade invoice?: A unique invoice number, your business name and address, the customer's name and address, the invoice date, a clear description of the work and parts, the amount due and the payment terms. If you are a sole trader, use your own name plus any trading name; if you are a limited company, include the registered company name and number.
Do I need to show VAT if I am not VAT registered?: No. If you are not registered you must not show a VAT amount or a VAT number at all, and you should not describe any part of the total as VAT. Once registered, you must show your VAT number, the rate applied, the net amount and the VAT amount separately.
How long should my payment terms be?: For domestic work, payment on completion is normal and reasonable. For commercial and landlord customers, 14 days is a good default; 30 days is common but hands the customer a free month of your working capital. State the term on the invoice and on the quote so it is never a surprise.
Can I charge interest on a late invoice?: For business-to-business work in the UK you have a statutory right to claim interest and a fixed recovery charge on late commercial payments. Most trades keep it in reserve as leverage rather than applying it automatically, but stating the right on the invoice quietly encourages people to pay on time.