For a flat-rate entrepreneur, the best online fiscal register is simple, cheap and approved. You need to issue a tidy receipt fast, avoid tax-rate mistakes and keep the monthly cost small and known - with no device or technician.
Why a flat-rate business needs a simple register
A flat-rate business does not keep complex books and does not want to fuss with tech. An online register that runs in the browser and on the phone gives a tidy receipt with no hassle and fits the KPO book.
What a good flat-rate register must have
- No hardware - works on phone, tablet and computer
- A QR code on the receipt and online fiscalisation
- An approved ESIR (Tax Administration register)
- A fair price with a clear number of receipts
- Support when needed
How much it costs
Plans start from about €9 per month, with up to 3,000 receipts included. Try a receipt free at pos.narbiz.com.
Key takeaways
- No hardware, works on phone and computer
- Simple for the KPO book and monthly duties
- From €9, up to 3,000 receipts included
- Approved ESIR (ID 1597)
Frequently asked questions
If it charges individuals, as a rule yes. Check your exact status with the Tax Administration or an accountant.
One that is approved, works with no hardware and is simple for daily use and the KPO book. Tezga eKasa is one example.
From about €9 per month, with up to 3,000 receipts included and no hardware cost.
What you get with Tezga eKasa
- No hardware - works on phone and computer
- Simple for the KPO book and monthly duties
- From €9, up to 3,000 receipts included
- Officially approved ESIR (ID 1597)
Read more
The simplest fiscal cash register in Serbia: type a sentence, get a receipt → Tezga eKasa is an officially approved ESIR: what that means for your business → e-Invoicing in Serbia 2026: who must comply, deadlines, and how →Try Tezga eKasa free
Fiscal receipts and e-invoices for service businesses - a register that keeps it simple.
Korisni vodiči za male firme - jednom mesečno, bez spama.