Tesla's promise of "full self driving" is about to get even more expensive.

According to Tesla CEO Elon Musk, the cost of the "full self-driving" feature, which is still in Beta and does not make Tesla's fully autonomous, will raise to $12,000 this month. It's currently a $10,000 add on.

"Tesla FSD price rising to $12k on Jan 17," he wrote on Friday. "Just in the US," Musk added.

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This is not the first time Tesla has hiked the cost of the confusingly named technology. In October, the CEO announced the cost was to increase from $8,000 to $10,000. And we can expect it to go up again in the future, as well.

"FSD price will rise as we get closer to FSD production code release," Musk noted Friday.

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We reached out to Tesla to confirm the dates and prices shared by Musk, although as Tesla notoriously has no public relations department or media liaison, we do not expect an immediate response.

In September, the National Transportation Safety Board asked Tesla to slow its rollout of the full self-driving software.

"Basic safety issues have to be addressed before they’re then expanding it to other city streets and other areas," NTSB head Jennifer Homendy told the Wall Street Journalat the time.

Maybe that extra $2,000 per order will be just the added cash Tesla needs to work out those last kinks. And if not, the company can always raise the price of FSD — again.