
Is Your State Tax Refund Taxable? The Tax Benefit Rule, Explained
A state income tax refund is federally taxable only to the extent last year's deduction actually reduced your tax. Standard-deduction filers report nothing; itemizers run the Schedule 1 worksheet, where the SALT cap ($40,000 for 2025, $40,400 for 2026), the margin by which itemizing beat the standard deduction, and the income-tax-versus-sales-tax election each cut the taxable amount below the Form 1099-G figure.










