Ford on Tuesday reported a 16.3% year-over-year sales increase for May, as the automaker continues an employee pricing program amid rising tariff costs.

Automakers led by Ford (F) saw big sales gains in May as price cuts and shedding inventories blunted the effect of President Trump’s auto tariffs. The question is how long they can maintain pricing in lieu of trade deals,

The company is offering thousands of dollars in discounts per vehicle as a part of its offering of “A Plan” discounts typically reserved for employees to its customers through the July