Missing Documentation: Why Expenses Without Evidence Are Not Tax Deductible

One of the most common reasons for additional tax assessments is the disallowance of expenses due to missing or inadequate documentation. The existence of a cost alone does not make it tax deductible.

During audits, FURS primarily checks whether there is a clear and traceable link between the expense and the business transaction.

What qualifies as proper documentation?

Proper documentation must:

  • clearly demonstrate the purpose of the expense,

  • be directly related to business activities,

  • ensure full traceability,

  • be properly archived.

Most common mistakes in practice

Frequently identified issues include:

  • invoices without sufficient descriptions,

  • missing supporting documents,

  • private expenses recorded as business costs,

  • documents not aligned with the timing of transactions.

➡️ Important: An expense without evidence effectively does not exist for tax purposes.

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