Audit the Pentagon Act of 2017 This bill requires a .5% reduction in Department of Defense (DOD) discretionary budget authority if DOD has not submitted a financial statement by March 2 of a fiscal year for the previous fiscal year or such financial statement has not received an unqualified or qualified audit opinion by an independent auditor. This reduction does not apply to military, reserve, and National Guard personnel accounts or the Defense Health Program account. The bill permits the President to waive any reduction in DOD budget authority if the reduction would harm national security or military personnel deployed in combat zones.