The IRS interest rates on underpayments and overpayments had remained unchanged since the first quarter of 2021. Starting April 1, 2022, the IRS interest rates increase by one percentage rate (Rev. Rul. 2022-5). The rates are:
Net income after claiming all deductions from gross income and adjusted gross income, such as IRA deductions, itemized deductions, or the standard deduction, and personal exemptions.