7 Invoicing Tips Every UK Tradesman Needs to Know

Late payments are one of the biggest headaches for UK tradesmen. According to recent studies, small businesses in the UK are owed an average of £8,500 in late payments at any given time. The good news? Most late payment issues can be solved with better invoicing practices.

1. Invoice Immediately After the Job

The single biggest mistake tradesmen make is waiting days or weeks to send an invoice. The longer you wait, the less urgent it feels to the customer. Send your invoice on the same day the work is completed — or even better, while you're still on site.

2. Set Clear Payment Terms

Always state your payment terms clearly on every invoice. Common options include:

• Due on receipt — Payment expected immediately
• Net 7 — Payment due within 7 days
• Net 14 — Payment due within 14 days
• Net 30 — Payment due within 30 days (common for commercial work)

For domestic customers, "Due within 7 days" is usually the sweet spot — long enough to be reasonable, short enough to keep your cash flow healthy.

3. Include All Legal Requirements

A UK invoice must include:

• Your business name and address
• A unique invoice number
• The date of the invoice
• A description of the goods or services
• The total amount due
• Your VAT number (if VAT registered)
• A breakdown of VAT (if applicable)

4. Make It Easy to Pay

The easier you make it for customers to pay, the faster you'll get paid. Include your bank details (sort code and account number) prominently on every invoice. Consider also accepting:

• Bank transfer (most popular for UK tradesmen)
• Card payments
• Cash (always provide a receipt)

5. Number Your Invoices Sequentially

Use a consistent numbering system for your invoices. This helps with:

• Tracking which invoices are paid vs outstanding
• Making your tax return easier
• Looking professional to clients
• HMRC compliance

A simple format like INV-001, INV-002, INV-003 works perfectly. If you use invoicing software, this is handled automatically.

6. Follow Up Politely but Firmly

If payment hasn't arrived by the due date:

• Day 1 overdue: Send a friendly reminder via text or email
• Day 7 overdue: Follow up with a phone call
• Day 14 overdue: Send a formal written reminder mentioning late payment charges
• Day 30+ overdue: Consider the Late Payment of Commercial Debts Act (you're entitled to charge interest at 8% + Bank of England base rate)

7. Keep Records of Everything

HMRC requires you to keep invoicing records for at least 6 years. Digital records are fine — and much easier to manage than paper. Keep track of:

• All invoices sent
• Payment dates
• Outstanding amounts
• Any expenses related to each job