Businesses required to be connected to NAV through the electronic tills include automotive and motorcycle repair shops and replacement parts retail stores, plastic surgery clinics, dance clubs, dry cleaners and those offering personal training services, according to Hungarian news agency MTI.

From January 1, 2017 currency exchange offices will also be required to install such tills, Varga added while speaking at the press conference. 

The minister said the expansion could result in the number of electronic tills growing by 30,000 and the government could see its revenue rise by HUF 20-30 billion.

Hungary made the use of electronic tills connected to the tax office mandatory for a broad range of businesses in 2014, as part of a measure to crack down on tax evasion.

Varga said talks are still ongoing with taxi drivers. The government would like to include the tills in the new taxi payment system by the start of 2017, but online tills may not be necessary as the tax office is able to receive relevant revenue information directly from taxi companies.

The government is considering if those affected by the changes should receive subsidies for installing electronic tills as circumstances are now different from those in 2014 following increased competition between till manufacturers, he added.