Paušal in Serbia
The KPO book: what it is and how to keep it
The KPO book (Knjiga o ostvarenom prometu) for flat-rate taxpayers: its columns, entering invoices, foreign-currency invoices at the NBS rate, keeping it electronically and for how long.
In short
The flat-rate entrepreneur's only business book (form KPO). Every invoice goes in: number, date and description, income from products, income from services and the total, in dinars. It's kept per calendar year and numbering restarts at 1 every 1 January. It may be kept electronically if it can be printed.
When: Kept continuously; the app keeps it for you
What to do
Issue every invoice through the app; the book entry is automatic. When an inspector asks for it, download the KPO book for the requested period under Reports (PDF or spreadsheet).
The columns of the KPO book
The KPO form has a header with your tax number, name, seat and activity code, and five columns:
- 1: entry number (starts from 1 every year)
- 2: date and number of the invoice, or a description
- 3: income from selling products
- 4: income from services
- 5: total (3 + 4)
Amounts are entered in dinars. An invoice in euros or another currency is converted at the NBS middle rate on the invoice date; a credit note is entered as a reduction.
Official sources
How to do it in Tefter
Other obligations
Tax Administration contact centre: 0700 700 007 or 011 6969 069
This is a plain-language overview, not legal or tax advice. Rules change; when unsure, check the official pages or call the Tax Administration.
Common questions
Can the KPO book be kept electronically?
Yes, as long as it can be printed when an inspector asks for it.
Which exchange rate is used for a euro invoice?
At the National Bank of Serbia's middle rate on the invoice date. The rules don't say explicitly whether the invoice or the payment date counts; practice is the invoice date.
How long do I keep it?
At least 5 years, together with invoices, contracts, bank statements and decisions. Invoices in SEF are kept for 10 years.
Your first invoice in five minutes
Download Tefter for free, enter your business details and issue an invoice. No account, no card.