The tax was only aimed at workers with a designated parking space in the Auckland and Wellington CBDs, where the value of a parking space was high.
But Property Council chief executive Connal Townsend said it would hurt businesses and workers and would only capture an extra $17 million annually.
KPMG tax lawyer Murray Sarelius said the extra cost to companies was likely to be passed on to workers in the long term.
Changes were initially raised in the 2011 Budget which flagged taxing baches, planes, yachts and salary sacrifices like complimentary laptops, carparks, cars, medical insurance and company credit cards.
"The Government is reviewing the tax treatment of employee benefits paid in lieu of salary. Any changes are expected to result in an increase in tax revenues," the 2011 Budget said.
Unite Union national secretary Matt McCarten said, "While the tax seems to target the benefits of highly paid white collar workers, it also captures blue collar night workers who can least afford it."
Tournament managing director James Brown said trying to determine whether a carpark was for staff or customers, if it was for private or business use or even whether a worker was an employer or an employee was going to be a nightmare for Inland Revenue.