Starting April 1, 2026, and through June 30, 2026, the IRS interest rate charged on underpayments for individuals declines to 6%, while large corporate underpayments are charged 8% interest. The interest rate that the IRS pays to individuals on overpayments (generally this means refunds not issued within 45 days) is also 6%, while the rate for large corporate overpayments exceeding $10,000 is 3.5%. Each rate is one percentage point lower than it was in the first quarter of 2026. #IdeaoftheDay
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