Invoicing Tips for Tradesmen: Get Paid Faster and Avoid Disputes

Late payments are one of the biggest frustrations in the trades. You've done the work, the customer is happy, but the invoice sits unpaid for weeks. Here's how to invoice professionally and get paid on time.

What a valid UK invoice must include

If you're VAT-registered, your invoices are legal documents. Even if you're not, a proper invoice protects you if there's ever a dispute. Every invoice should have:

• Your business name and address
• Your VAT number (if VAT-registered)
• A unique invoice number
• The date the invoice was issued
• The customer's name and address
• A description of the work carried out
• The amount charged (net, VAT, and gross if applicable)
• Your payment details — bank name, sort code, account number
• Your payment terms — e.g. "Payment due within 14 days"

Missing any of these can give an awkward customer grounds to delay.

Set clear payment terms upfront

The best time to agree on payment terms is before you start the job — not when you send the invoice. Discuss it when you quote:

• Residential work: 14 days is standard
• Commercial work: 30 days is common, but you can negotiate
• Large jobs: consider requesting a deposit (25–50%) upfront

If the customer wants longer terms, that's their business — but you should price accordingly.

Invoice immediately after finishing

The longer you leave it between finishing the job and sending the invoice, the longer you wait to get paid. Invoice the same day or the day after.

If it was a multi-day job, consider invoicing in stages (applications for payment) rather than waiting until the end.

Chase politely but promptly

If payment is due on a Friday and it hasn't landed by Monday, send a reminder. A simple message works:

Hi [Name], just following up on invoice [number] for [amount] which was due on [date]. Please let me know if you have any questions. Bank details are on the invoice. Thanks.

Most people genuinely forget. A polite reminder is not rude — it's professional.

Dealing with disputes

If a customer disputes an invoice, deal with it in writing. Ask them to put their concerns in an email. This creates a paper trail and often resolves things quickly because customers have to be specific about their complaint.

Never reduce an invoice just to avoid conflict unless there's a genuine reason. If you do agree a reduction, issue a credit note.

VAT and CIS

If you're working under the Construction Industry Scheme (CIS), the contractor deducts 20% (or 30%) from your labour before paying you. Make sure your invoices clearly split labour and materials, and show the CIS deduction.

If you're VAT-registered and working for another VAT-registered contractor on construction services, you may need to apply the domestic reverse charge — where you don't charge VAT and instead the contractor self-accounts for it.

These rules can be confusing. Good invoicing software handles the calculations for you automatically.

Keep records

HMRC expects you to keep invoices for at least 6 years. Storing everything digitally means you can find any invoice instantly — which matters when a customer calls you about a job you did two years ago.