Tesla is set to hit its federal tax credit cap in 2018, phasing out a key incentive for consumers to purchase electric vehicles.

According to a U.S. Securities and Exchange Commission filing, Tesla is projected to sell its 200,000th delivered electric vehicle this year, capping the $7,500 federal tax credit after that. After the 200,000th vehicle, tiered reductions in credited amounts begin, with buyers receiving a $3,750 credit in the following six months, followed by a $1,875 credit in the six months after that.

At the year mark, the federal tax credit will no longer be offered. Tesla has not revealed the number of delivered vehicles this year.

“Under current regulations, a $7,500 federal tax credit available in the U.S. for the purchase of qualified electric vehicles with at least 17 kWh of battery capacity, such as our vehicles, will begin to phase out over time with respect to any vehicles delivered in the second calendar quarter following the quarter in which we deliver our 200,000th qualifying vehicle in the U.S.,” said Tesla in its SEC filing. “We currently expect such 200,000th qualifying delivery to occur at some point during 2018.”

The federal tax credit cap will also affect General Motors and Nissan sooner than other automakers, given increasing sales with GM’s 168,000 Volt, Spark, Bolt EVs, and lesser models through Dec. 2017 and Nissan Leaf sales of approximately 114,000 in the same period. Others, such as Toyota and Ford, continue in the five-digit range.

Many in the industry have expressed concern over the stoppage, in light of increasing competition amongst EV automakers and the lower price point of the mass-market Model 3, where reservation holders are arguably more likely to be reliant on government assistance. Sales to the Model S and Model X are not likely to be impacted, due to their higher price point.