IRS Commissioner Daniel Werfel said in a letter to IRS workers on Friday that he intends to step down from his position on President-elect Donald Trump’s Inauguration Day.

“After significant introspection and consultation with others, I’ve determined the best way to support a successful transition is to depart the IRS on January 20, 2025,” Werfel said in a note addressed to all IRS employees. “While leaving a job you love is never easy, I take comfort in knowing that the civil servant leaders and employees at the IRS are the exact right team to effectively steward this organization forward until a new IRS Commissioner is confirmed.”

Werfel’s term was not scheduled to end until 2027. His early departure on Monday is unusual, since IRS commissioners’ terms typically extend from one presidential administration into another. Werfel’s term began in March 2023, under President Joe Biden, a Democrat, and was set to end in November 2027, under Trump, a Republican.