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Cost of interlocks

Information about the cost of having an interlock device fitted to a vehicle.

There are three private companies that are authorised to supply and install interlock devices in Victoria:

  • Guardian Interlock Services Australasia
  • Draeger Safety Pacific
  • Smart start.

Generally, the company will charge for installation and training (about $180), monthly service and lease fee and again for removal of the device. The cost may vary according to the type of vehicle to be fitted. It is more difficult to fit the device on some types of vehicles so it may cost more.

Costs vary so it is worth shopping around, but the regular service/lease fee could be around $182.75 per month. People who hold a current health care card are eligible for a concession (still around $90 each month).

For estimates of the fees involved see the 'Finding an alcohol interlock supplier' in 'Completing the alcohol interlocks program' in VicRoads—About the Victorian alcohol interlock program.(opens in a new window)

Cost of removing the interlock

The driver must also pay for the cost of having the interlock removed when they have been to VicRoads for approval. This will cost approximately $110.

Extra cost recovery fees

VicRoads charges an administrative fee to cover the cost of running the interlock program. This fee is in addition to the other fees that the interlock supplier charges. The cost is 2.5 fee units (as at 15 February 2021 is $37.00) per month. Interlock providers are responsible for collecting this charge and making payments to VicRoads. It will result in higher fees for interlocks to be installed.

People with a concession card will pay an additional 1.25 fee units ($18.50) each month.


More information


Road Safety Act 1986 (Vic)

  • s. 50AAKA—cost recovery fees

See Road Safety Act 1986 (Vic)(opens in a new window).

Road Safety (Drivers) Regulations 2019 (Vic)

  • Division 4—alcohol interlocks
  • r. 108—cost recovery fees
  • items 15, 16—Schedule 6—General fees

See Road Safety (Drivers) Regulations 2019 (Vic)(opens in a new window).



VicRoads has information about alcohol interlocks and contact details for authorised interlock providers.

See VicRoads—About the Victorian alcohol interlock program(opens in a new window).

Interlock providers

Guardian Int erlock Systems

One of the authorised providers is called Guardian Interlock Systems. This site links to location details for their Victorian service centres. There is also a price list for the various services involved.

See Guardian Interlock Systems(opens in a new window).

Smart start int erlocks

This site has training information including a video to demonstrate how to use particular brands of interlocks. There are interlock FAQs and a list of accredited assessors in Victoria.

See Smart start interlocks(opens in a new window).

Draeger inte rlock suppliers

This site has information about how to use their interlocks and a list of FAQs.

See Draeger Safety Pacific(opens in a new window).