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Revenue Ruling 2025-11 provides interest rates for the third quarter 2025, including rates for underpayments and overpayments. The rates for interest determined under Section 6621 of the code for the calendar quarter beginning July 1, 2025, will be 7 percent for overpayments (6 percent in the case of a corporation), 7 percent for underpayments, and 9 percent for large corporate underpayments. The rate of interest paid on the portion of a corporate overpayment exceeding $10,000 will be 4.5 percent.

Revenue Ruling 2025-11 will be in IRB 2025-23, dated June 2, 2025