8 faktureringsfeil som koster EU-frilansere tusenvis hvert år

8 Invoicing Mistakes That Are Costing EU Freelancers Thousands

Most invoicing mistakes are invisible until they become expensive. Here are the 8 we see most often — and exactly how to fix them.

Mistake 1: Missing Mandatory Invoice Fields

An invoice missing required fields isn't just unprofessional — in many EU countries, it's legally invalid. Your client can't deduct the VAT, and you may face penalties.

Required for most EU countries:

• Full legal name and address (yours and client's)
• VAT number (both parties, if VAT-registered)
• Sequential invoice number
• Issue date AND supply date
• Line-by-line description of services
• Net amount, VAT amount, gross total
• Payment terms and bank details

Fix: Use a compliant invoicing template. Arbeitly's templates include all required fields by default.

Mistake 2: Non-Sequential Invoice Numbers

Gaps in your invoice sequence (e.g., INV-001, INV-002, INV-005) are a major red flag in tax audits. Tax authorities assume the missing numbers represent hidden income.

Fix: Never manually assign invoice numbers. Let your software do it.

Mistake 3: Wrong VAT Treatment on Cross-Border Invoices

Charging your local VAT rate to a German client is almost certainly wrong. B2B cross-border EU services use reverse charge.

Fix: Arbeitly automatically applies the correct VAT treatment based on your country and your client's country and VAT registration status.

Mistake 4: No Late Payment Clause

EU Directive 2011/7/EU gives you the legal right to charge interest on late payments (8% above ECB reference rate for B2B). But you must include this in your payment terms to enforce it.

Fix: Add "Late payment interest of [rate]% per month applies after [30] days" to your standard terms.

Mistake 5: Inconsistent Descriptions

"Consulting services - March" is too vague. It provides no audit trail, makes VAT recovery harder for your client, and raises questions during disputes.

Fix: Always include: service type, period, and any reference numbers.

Mistake 6: Not Following Up on Overdue Invoices

The average freelancer waits 47 days after a payment due date before following up. The probability of recovery drops significantly after 90 days.

Fix: Set an automatic reminder: 7 days before due, on due date, and 7 and 14 days after. Arbeitly does this automatically.

Mistake 7: Not Keeping Copies

Many EU countries require you to keep invoice copies for 7-10 years. If you're generating invoices in Word and emailing them, you're one hard drive failure from losing critical records.

Fix: Use cloud-based invoicing. Arbeitly stores all invoices permanently on EU servers with automatic backups.

Mistake 8: Invoicing in the Wrong Currency

If your contract specifies EUR but you invoice in USD, you've created an accounting problem and possibly a VAT compliance issue.

Fix: Always invoice in the currency specified in your contract. If using multi-currency, document the exchange rate used.

Which of these are you currently making? Fix your invoicing workflow →