Since 1 October 2016 fast electric bikes (top speed 45 km/h), have been allocated a new legal status – they are now considered as mopeds (bike with an engine) rather than bicycles. The major consequence of this change is the end of the total tax exemption for the employer on the bike allowance. Electric bikes can still open the right to an allowance of 0.22 EUR per kilometer but this amount is only tax exempt up until 31.70 EUR per month. There is no ONSS (social charges) to be paid on the allowance. Electric bikes with a top speed of 25km/h are in a separate category and they still retain the total tax exempt status (along with classic bicycles).
One of Belgium's payroll agencies, Partena, has published a useful tool that allows you to see how much your company car is going to cost you in 2012 under new tax rules which came into force on 1st January 2012. The new rules calculate the taxable value of your car based on four criteria: CO2 emissions, the catalogue value of the car, the type of fuel used and the distance between your home and office. Partena's tool also allows you to compare the cost in 2011 with the new cost in 2012. It is available here http://partenahr.be/s_car_atn.aspx?&Langtype=2060