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B1 gaming machines

Machine category

Max stake

Max prize

Permitted location

Max number of machines


2005 Act
large casino

2005 Act
small casino

1968 Act casino





(with the option of a max £20,000 linked progressive jackpot on a premises basis only)

2005 Act and 1968 Act casinos 

Max 150


Any combination of categories B to D


(subject to machine/table ratio 5-1)

Max 80


Any combination of categories B to D


(subject to machine/table ratio 2-1)

Max 20

any combination of categories B to D




any number of C or D machines instead

Licences and permits required

B1 machines can only be made available in casinos so you must have either a 2005 Act casino operating licence or a 1968 Act casino operating licence to make them available. 

If you are a machine manufacturer or supplier you will need a gaming machine technical licence, which type will depend on the nature of your business. 

Gaming machine technical standards

For the full details of the technical standards to which this category of machine must comply see Machine standards category A & B1 

All gaming machines sited on casino premises must comply with our gaming machine technical standards

Test houses

Category B1, B2, B3 and B3A gaming machines must be tested by an independent test lab to ensure they comply with the technical standards in full.

For categories A, B1, B2, B3, B3A, B4, C, D, server networked and downloadable, cashless payment, linked progressives and wireless networks refer to the Gaming machine testing strategy. 

Return to player (RTP)

B1 machines must display the “theoretical target percentage return to player”. 

RTP is an average measured over a large number of games and will vary over a typical session due to normal game volatility. 

It is a matter for the manufacturer to decide upon the game RTP and there is no minimum requirement but the minimum average return must be displayed to the player for the game. 

The value displayed must be verified either by the manufacturer or accredited test lab for categories B1, B2, B3 and B3A. 

There are duties to be paid on gaming machines so you should read this information in conjunction with the characteristics published by HMRC

VAT Betting and Gaming guidance