New rules on invoices, discounts and SEF reporting
Serbia has adopted significant amendments to its VAT Rulebook, published in Official Gazette No. 30/2026 and effective from the April 2026 VAT period.
The changes further tighten the interaction between VAT compliance and the country’s SEF electronic invoicing platform requirements.
Key updates include:
- VAT base estimation restricted
VAT payers may now estimate the VAT base only where the value depends on third-party information unavailable when the tax point arises. - New rules on discounts and VAT base adjustments
VAT base increases or decreases must be reported in the tax period in which the change occurs. Subsequent discounts are recognised once contractual conditions are fulfilled, regardless of when supporting documents are issued. - Goods returns aligned with VAT base reductions
All returns of goods now trigger VAT base reduction rules, extending the previous narrower treatment. - Simplified timing rules
Businesses no longer need to identify the precise date of a VAT base adjustment. The last day of the relevant VAT period may be used. - Consolidated adjustment documents permitted
One combined increase or decrease document may now cover multiple changes within the same tax period. - Advance invoice clarification
Where payment and supply occur on the same day, only a final invoice is required, although advance invoices remain optional. - Mandatory SEF self-invoicing
From April 2026, self-invoices must be created exclusively within SEF using the “Individual VAT Record – Internal account” document type.
The reforms continue Serbia’s move toward more prescriptive digital VAT reporting and e-invoicing controls.
