How to write an invoice - UK guide with template
Friday 22nd August 2025
Last updated: 10th October 2025
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Cash flow challenge: I’m worried my invoices don’t include everything they should, which sometimes causes delays or disputes in getting paid.
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Perfect for: Small business owners, freelancers, and contractors who want to issue clear, professional invoices that get paid quickly..
Novuna helps businesses manage cash flow by combining clear invoicing practices with access to flexible funding. We compare providers, guide you through applications, and make sure you get the right support to keep cash moving.
Why getting invoices right matters
Many late payments happen because invoices are missing details or don’t meet legal requirements. By issuing clear, professional invoices, you can speed up client payments and reduce disputes.
What every UK invoice must include
To comply with UK requirements and avoid delays, your invoice should include:
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Your business details - name, address, and contact information
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Client details - the customer’s full name and address
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Unique invoice number - a simple numbering system to keep track
- Invoice date - the date the invoice was issued
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Payment due date - when you expect payment, aligned with agreed terms
- Description of goods or services - clear and itemised where possible
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Total amount due - including VAT if applicable
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Payment details - bank account or payment method instructions
Simple invoice template (UK)
Invoice:
From: [Your business name, address, contact details]
To: [Client name, address]
Invoice Number: [0001]
Invoice Date: [DD/MM/YYYY]
Payment Due: [DD/MM/YYYY]
|
Description |
Quantity |
Unit Price |
Unit Price |
| Service A |
10 |
£50 |
£500 |
|
Service B |
5 |
£100 |
£500 |
Subtotal: £1,000
VAT (20%): £200
Total Due: £1,200
Payment instructions: [Your bank details or preferred method]
Tips to make invoices more effective
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Agree terms upfront - set expectations on payment before work begins
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Send invoices promptly - don’t delay once the job is done
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Make payment easy - offer online payment or multiple options
- Track and follow up - keep records and send polite reminders when due dates pass
How Novuna Business Cash Flow helps
Even with perfect invoices, some clients still pay late. Novuna helps bridge these gaps with funding options such as invoice finance and short-term working capital solutions. That way, your business keeps moving while you wait for customers to pay.
