Thank you Paul and Marc.
Paul, from the Revenue e-working document: "Additionally, the provision of other equipment, such as office furniture, etc., by the employer to enable the employee work from home will not attract a BIK charge, where the equipment is provided primarily for business use." Seems fairly clear. I presume it applies to employee directors as well as non-director employees.
Marc, I don't quite understand what you mean. Are you saying that in year one there's a 5% BIK charge on 100% of the cost, reducing to 5% of 87.5% of the cost in year 2, and so on? If so, what's the basis for the 5% charge? The only reference I can find (via Google) to a 5% BIK rate is for the private use of commercial vans.