Invoicing: five common mistakes that cost SMEs money
Small slips on the invoice that turn into lost VAT, fines and late payments
A badly issued invoice is rarely just an administrative issue. It affects VAT deduction, your relationship with the customer and your cash flow.
In most SMEs, invoicing problems repeat for the same reasons. These are the five we see most often.
1. Incomplete customer details
Without the correct tax number and address, the customer may be unable to deduct VAT and the invoice can be disputed. Validate the details before issuing, not afterwards.
2. Wrong VAT rate or exemption
Transactions with customers in other Member States, exempt services or reverse charge call for the correct legal reference. A wrong rate means rectifying the invoice and correcting returns.
3. Issuing late
The invoice must be issued within the legal deadline after the service or delivery. Invoicing "when there is time" delays payment and creates VAT mismatches.
4. Not reporting or archiving
Documents must be reported to the Tax Authority and kept for the legal period. A simple filing process saves hours in the event of an inspection.
5. No payment follow-up
Issuing is only half the job. Without a list of open invoices and regular reminders, delays pile up and cash flow suffers.
Good practice
- Use certified invoicing software and pre-configured templates.
- Set a weekly routine to review open invoices.
- Send your accountant the documents every month, not only at quarter end.
Need help organising your invoicing? Talk to our team.
