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The 2026 rules quietly moved millions back into itemizing range.
For 2018–2024 the answer was boring: the $10,000 SALT cap made the standard deduction right for almost everyone. For 2026 it is not boring anymore. The SALT cap is $40,400, the standard deduction is $16,100–$32,200, a new 0.5%-of-AGI floor shaves charitable deductions, and non-itemizers get a brand-new above-the-line charitable write-off. Millions of homeowners in high-tax states crossed back into itemizing territory and don't know it. This calculator runs the full 2026 comparison in one pass.
Homeowners in high-tax states use it to catch the 2026 regime change: the SALT cap quadrupled to $40,400 while the standard deduction barely moved — millions who haven't itemized since 2017 cross back over, and the answer is now worth $2,000–$4,000 a year.
Three things: the SALT cap quadrupled from $10,000 to $40,400 (through 2029), so high-tax-state homeowners can deduct real property + state income tax again; a new 0.5%-of-AGI floor slightly reduces itemized charitable deductions; and a new above-the-line charitable deduction ($1,000 single / $2,000 joint) appeared for non-itemizers. The crossover math is genuinely different from 2024.
The $40,400 cap shrinks by 30 cents for every dollar of MAGI above $505,000, bottoming out at the old $10,000 floor around $606,300. Inside that band each extra dollar of income also destroys 30¢ of deduction — an effective marginal rate about 11 points higher than your bracket. Timing bonuses, Roth conversions, or capital gains around that window is worth real money.
Charitable bunching: stack two years of donations into one year to clear the standard deduction that year, then take the standard the next. With the new above-the-line $1,000/$2,000 charitable deduction in the "off" year, bunching is more powerful in 2026 than it has ever been. A donor-advised fund is the usual vehicle.