The IRS says it will remain open for five business days in the event of a government shutdown starting October 1, 2025—thanks to billions in leftover funding from the Inflation Reduction Act. Trump contingency relies more heavily on IRA fundsThe current administration is leaning on Inflation Reduction Act funding more aggressively than the Biden administration did during shutdown preparations in 2023. That year, the IRS reversed course and prepared to furlough two-thirds of its staff. IRS warns: Phone service may sufferThe IRS typically answers around 46,000 taxpayer calls per day in October. If that happens, the IRS will operate for five days—but what comes next is uncertain.