Steuern2026-09-02
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
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 vehicles and real estate used privately.
– Acquisition tax on services from abroad is forgotten.
– Flat rate VAT remains the same, although the activity has changed.
– Discounts and credits are not clearly separated.
– Missing documentation 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.
The most important points in brief
– Perform a sales reconciliation once a year.
– Check acquisition tax for every purchase from abroad.
– Archive export documentation digitally for five years.
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