Guides
The regulations explained in plain language
Deadlines, obligations and what actually happens in practice — without copying out the law and without small print. The texts are informative; for your specific situation ask your accountant.
Opening a company in Serbia as a foreigner: steps, costs, taxes and residence
How a foreign national or foreign company sets up a d.o.o. in Serbia: documents and the foreigner ID number, electronic registration at the Business Registers Agency (APR) for RSD 8,000 in five working days, tax ID and VAT, SEF e-invoicing, corporate tax and dividends, the unified residence and work permit — with official sources.
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eBolovanje for employers: sick leave in Serbia and RFZO claims
Who is obliged and from when, who pays the first 30 days of sick leave and who pays after, the 15-day RFZO claim deadline and the earnings certificate (XML).
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Where is your business data? Questions to ask every software vendor
Nine questions for any software vendor: where data is stored, who the sub-processors are, what is encrypted, can you export it, what remains after you cancel.
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E-delivery notes in Serbia: who must use them, from when and how
Who must use e-delivery notes from 1 January 2026 and who from 1 October 2027, what the recipient of goods must do and how the goods receipt is issued.
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SEF e-invoicing in Serbia: how to start and the response deadlines
Who must issue e-invoices in Serbia, how a company connects to SEF with an API key and what happens if you do not respond to an incoming invoice within 15 days.
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KPO ledger for flat-rate taxpayers in Serbia: rules and limits
The KPO ledger of flat-rate taxpayers in Serbia — what is entered in it, when it is closed and how the limits of 6 and 8 million dinars work.
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Quote, proforma invoice and invoice: differences and when to issue
Three documents that are constantly mixed up — what each one is for, which one is binding, which one enters the books and how one turns into the next.
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What duplo does
- SEF e-invoicing software for Serbia
Send and receive SEF e-invoices from one programme: invoices, advance invoices and credit notes, with status tracking and responses to incoming invoices.
- E-delivery notes and goods receipts software (eOtpremnice)
Electronic delivery notes via the SEO system: sending, receiving from suppliers, confirming physical receipt of goods and issuing a goods receipt line by line.
- KPO ledger for flat-rate taxpayers
The KPO income ledger for flat-rate taxpayers in Serbia is kept automatically from issued invoices, with a PDF form and tracking of the flat-rate limit.
- Software for accountants and accounting agencies
For accountants and agencies: entries post themselves from invoices, bank statements and payroll, partner ledgers stay current, all clients under one login.