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CREFIDA

SteuernSeptember 2, 2026

VAT: the five most common errors in invoicing

Input tax deduction, flat rate tax method, and foreign services — what the FTA particularly focuses on during audits.

Nadine Brunner · Head of VAT · 6 Min. Reading time

5

Sources of error with the highest risk of additional payments

5 years

Statute of limitations for audits

4x

Settlements per year in the normal case

The Classics

Most corrections during audits do not arise from intent, but from routine. Recurring bookings are adopted without anyone re-evaluating the facts.

  • Input tax deduction on privately co-used vehicles and real estate.
  • Acquisition tax on services from abroad is forgotten.
  • Flat rate tax method is maintained even though the activity has changed.
  • Discounts and credits are not cleanly delineated.
  • Missing evidence for export deliveries.

How to prevent it

A brief annual reconciliation between accounting and settlement is sufficient in most cases. It is important that documents are digitally retrievable — during an audit, provability, not good intention, is decisive.