Daperis CPAThe New Cap on Itemized Deductions for Top-Bracket Earners
If you're in the top tax bracket, a dollar of itemized deductions has always been worth 37 cents to you, the same as your tax rate. Starting with 2026, that's no longer quite true. A new rule caps the value of your itemized deductions at 35 cents on the dollar instead. If you're a high earner with big deductions for state taxes, mortgage interest, or charitable giving, this is worth knowing about before it shows up as a surprise.
How It Actually Works
The rule shaves a small amount off your itemized deductions if your income is high enough to land you in the top bracket. Unlike previous tax rules, every itemized deduction is now subject to this 2/37 limitation; there are no carve-outs for medical or other expenses.
However you slice the math, it comes out the same: itemized deductions that used to save a top-bracket taxpayer 37 cents per dollar now save closer to 35 cents. It's a small haircut, not a full disallowance, and it only kicks in once you're in the top bracket to begin with.
Who This Actually Affects
This is narrow. It only touches people in the 37% bracket, which is already a high bar, and within that group, it only matters if you're itemizing a real amount. Someone in the top bracket taking the standard deduction won't feel this at all. It's the combination of top-bracket income and large itemized deductions, often business owners in high-tax states, people with big mortgage interest, or serious charitable donors, where this actually shows up.
How It Stacks With the New Charitable Rules
If you're a high-earning itemizer who also gives significantly to charity, this rule and the new floor on charitable deductions both apply to the same return, on top of each other. The charitable floor cuts how much of your giving counts as deductible at all. This rule then shaves the value of whatever charitable deduction survives that floor, along with everything else you itemize. Neither cancels the other out.
What This Means for Planning
This isn't a reason to stop itemizing, or to change bigger decisions like buying a home or giving to charity. It is a reason to model your actual after-tax benefit more carefully if you're a top-bracket taxpayer with large deductions, since the number you might be used to, full value at your tax rate, isn't accurate anymore starting with 2026. If you're timing a big charitable gift, a Roth conversion, or a business sale that could push your income through this threshold, this two-point haircut belongs in your planning.
Keep It Simple / Key Takeaway 🍕
For most people, this barely moves the needle. For a genuine high earner with large deductions, it's a real, measurable reduction in what those deductions are actually worth, and it's worth running your own numbers instead of assuming last year's planning still holds.
This stacks with the new charitable giving floor for anyone who itemizes and gives significantly, worth reading together.
Disclaimer: This article is for educational and informational purposes only and is not intended as financial, investment, legal, or tax advice. The author assumes no liability whatsoever in connection with its use. This content is not an exhaustive explanation of any topic, practice or process. You should always seek the advice of a licensed professional before making any accounting, tax, financial, investment or legal decision.