Online pénztárgép — NAV-connected cash registers

Before RTIR Online Számla and long before modern CTC systems, Hungary deployed in 2013-2014 a pioneering scheme of online fiscal cash registers (online pénztárgép) for B2C retail. Each receipt is transmitted to NAV in near-real-time via an integrated SIM card.

History — 2014 deployment

• September 2013. Adoption of 48/2013 NGM rendelet imposing the progressive replacement of traditional registers by online pénztárgép. Flagship anti-evasion measure of the Orbán government.
• May 2014. First wave — food retail and tobacco, restaurants. ~80,000 registers installed.
• 1 September 2014. Universal obligation for target sectors. Penalties effective.
• 1 January 2015. Extension to automotive services (garages), appliance repair, beauty.
• 2016-2020. Progressive extensions: taxis, laundries, hair salons, cash-heavy professions. Reaching ~200,000 certified registers.
• 2021-2026. The system stabilizes. Registers are not absorbed by Online Számla — coexistence with distinct roles (receipt vs invoice).

AEE — certified fiscal module

Each certified register contains a sealed fiscal module called AEE (Adóügyi Ellenőrző Egység — fiscal control unit). Its characteristics:

• Sealed hardware module. Secure microprocessor with tamper-proof non-volatile memory (EEPROM). On detected physical tampering, the register enters blocked mode.
• Fiscal memory. Each receipt is cryptographically signed and locally stored before transmission. The memory can retain at least 5 years of history.
• Certification. NAV certifies AEE models with manufacturers (~30 certified manufacturers in 2026, mainly Hungarian: Microsystem Elektronika, Pénztárgép Hungary, Cassa Engineering Hungary, etc.).
• Integrated SIM card. Dedicated M2M card provided by Magyar Telekom, Vodafone HU, or Yettel HU (formerly Telenor), at preferential M2M rate. The card is locked to the AEE module by its IMEI.
• Transmitted data. For each daily close (Z-jelentés), totals per VAT rate and hash of individual receipts are sent to NAV. The receipts themselves remain in the register, transmitted on audit request.

SIM / GPRS / 4G communication to NAV

• NAV PT-Server protocol. NAV proprietary binary communication over TCP/IP on the M2M SIM. Endpoint pt.nav.gov.hu (private network, non-public).
• Frequency. Automatic transmission at each close (Z-jelentés, usually daily), with receipt retransmissions for 30 days on failure.
• No WiFi. Deliberately, NAV requires a dedicated SIM — no use of the establishment's WiFi, to avoid any interception or diversion.
• Cost. ~200-300 HUF/month (~€0.50-0.75) for the M2M SIM, mutualized on the NAV contract. Merchant's responsibility.
• Degraded mode. On prolonged SIM outage (> 30 days), the register enters blocked mode and refuses transactions. The merchant must request NAV intervention.

Scope — sectors covered

Pénztárgép vs Online Számla

Two distinct schemes, sometimes wrongly confused:

• Mixed case. A restaurant serving an individual customer issues a receipt via pénztárgép. If that customer requests a personalized invoice, the restaurant must generate it in parallel via Online Számla — the invoice then replaces the receipt. Duplicate reporting prohibited.
• Unified reporting. Both flows converge in the NAV cross-check system, but via separate pipelines. A monthly VAT return (bevallás) consolidates both.

Common pitfalls

• Believing a pénztárgép receipt is an invoice. The cash receipt (nyugta) does not allow VAT deduction by the customer (except if < 200K HUF in exceptional B2B since 2020). For any deduction, request an Online Számla invoice.
• Connecting the AEE SIM via WiFi. Technically impossible: the SIM is M2M-locked on the AEE module IMEI, no WiFi mode possible. Any attempt triggers register blocking.
• Bad sequence handover. Each register has a unique receipt sequence. On register change (failure, replacement), the decommissioning declaration must be made to NAV via the nyitvatartás portal, otherwise residual receipts in memory are never transmitted.
• Issuing a receipt without certified pénztárgép. Any business listed in scope issuing a non-AEE-certified receipt faces an immediate fine of up to 1M HUF per inspection, and administrative closure for up to 6 days.
• Not anticipating the Online Számla module. A merchant going B2B (regular professional customers) must register to Online Számla in addition to pénztárgép — both coexist.

Cross-links

• Hungary hub — full RTIR
• NAV Online Számla — B2B platform
• Hungarian VAT regimes
• Hungarian retail EDIFACT
• Termékdíj — environmental fee
• 48/2013. (XI. 15.) NGM rendelet — pénztárgép
• NAV — official pénztárgép portal