How the 2026 itemized deduction cap affects high earners

How the One Big Beautiful Bill Act caps itemized deductions

The One Big Beautiful Bill Act (Public Law 119–21, signed July 4, 2025) introduced one of the most significant structural changes to itemized deductions in nearly a decade. For high-income earners who rely on Schedule A to reduce their federal tax burden, Section 70111 of the legislation establishes a new cap that limits how much benefit those deductions can actually deliver. This replaces the former Pease limitation, which was suspended under the Tax Cuts and Jobs Act from 2018 through 2025 but was never permanently eliminated.

The new cap is narrower in scope than the old Pease limitation but carries real consequences for taxpayers in the top 37% tax bracket. Unlike the Pease rule, which applied to a broader range of incomes and used a flat 3% reduction of total deductions, the new formula under OBBB ties the reduction directly to taxable income above the 37% bracket threshold. This creates a more precise and mathematically bounded limitation. However, it still chips away at the deduction value that high earners have long relied upon to lower their effective tax rate.

Understanding how this provision works, who it affects, and what planning strategies can offset its impact is essential for Individuals heading into the 2026 tax year. The rules are now in effect and require proactive review of your deduction strategy regardless of filing status.

What the new 2/37 reduction formula actually means

At the core of Section 70111 is a specific mathematical formula. The allowable itemized deductions for a top-bracket taxpayer are reduced by 2/37 of the lesser of two amounts:

1. Total itemized deductions claimed on Schedule A, or
2. Taxable income above the dollar threshold at which the 37% rate bracket begins

This ratio, 2/37, is approximately 5.41%. When applied to the full itemized deduction amount, it effectively reduces the marginal tax rate on each dollar of itemized deductions from the full 37% rate to approximately 35%. The bill's analysis document summarizes this as a "similar, but not identical, 35% cap" compared to the prior-law framework.

Importantly, the One Big Beautiful Bill Act also clarifies that the Section 199A qualified business income (QBI) deduction is explicitly excluded from this limitation. Section 70111(b) amends Section 199A(e)(1) to ensure that the QBI deduction is computed without regard to Section 68. This means self-employed individuals and pass-through business owners who claim the QBI deduction will not see that deduction diminished by this new cap, preserving a significant planning tool even for those in the top bracket.

The provision applies to taxable years beginning after December 31, 2025, meaning it takes full effect on 2026 tax returns filed in 2027. Taxpayers who are currently planning their charitable contributions, mortgage interest deductions, or Health savings account strategies should factor in this new cap when projecting their 2026 tax liability.

Who qualifies for the 37% tax bracket in 2026

The new itemized deduction cap applies exclusively to taxpayers in the top federal income tax bracket. For 2026, the IRS threshold at which the 37% rate begins is:

• Single filers and married filing separately: $626,350
• Married filing jointly: $751,600
• Head of household: $626,350

Only taxpayers with taxable income above these thresholds are subject to the new cap. A married couple filing jointly with $700,000 in taxable income, for example, falls below the $751,600 MFJ threshold and is not affected by this provision at all. By contrast, a single filer with $650,000 in taxable income is $23,650 above the threshold and will face a reduction on their itemized deductions.

The targeted nature of this threshold is what distinguishes the OBBB cap from the old Pease limitation. The Pease limitation historically applied to taxpayers well below the top bracket, starting at approximately $300,000 or more in income. The new provision concentrates its impact on the highest earners, making it a more selective, though still consequential, limitation.

For taxpayers who hover near the threshold, strategic income reduction through tools like Traditional 401k contributions or Tax loss harvesting may move their taxable income below the 37% bracket threshold entirely, avoiding the cap altogether. This is a critical planning consideration for 2026 and beyond.

Calculating your itemized deduction reduction in 2026

To apply the cap correctly, identify which of the two values is smaller: your total itemized deductions or your taxable income above the 37% bracket threshold. The 2/37 reduction is then applied to whichever is lesser.

Example 1: Single filer, income well above the threshold

• AGI: $700,000
• 37% bracket threshold (single): $626,350
• Taxable income above threshold: $700,000 minus $626,350 equals $73,650
• Total itemized deductions: $80,000
• Lesser of the two amounts: $73,650
• Reduction: 2/37 multiplied by $73,650 equals approximately $3,981
• Net allowable itemized deductions: $80,000 minus $3,981 equals $76,019
• Additional tax cost of the cap: $3,981 multiplied by 37% equals approximately $1,473

Example 2: Married filing jointly, high deductions

1. AGI: $900,000
2. 37% bracket threshold (MFJ): $751,600
3. Taxable income above threshold: $900,000 minus $751,600 equals $148,400
4. Total itemized deductions: $120,000
5. Lesser of the two amounts: $120,000 (deductions are smaller)
6. Reduction: 2/37 multiplied by $120,000 equals approximately $6,486
7. Net allowable itemized deductions: $120,000 minus $6,486 equals $113,514
8. Additional tax cost of the cap: $6,486 multiplied by 37% equals approximately $2,400

These examples illustrate that the additional tax burden from the new cap is meaningful but bounded. Under the old Pease limitation at comparable income levels, the MFJ filer in Example 2 would have faced a 3% reduction on $600,000 (excess over a ~$300,000 Pease threshold), equaling $18,000 in lost deductions and costing roughly $6,660 in additional taxes. The OBBB cap at $6,486 in reduced deductions is significantly less punitive for this taxpayer. For more details on how itemized deductions are reported, see IRS Publication 17.

Which Schedule A deductions does the new cap apply to

The Section 70111 limitation applies broadly to itemized deductions after all other limitations have already been applied. This means the 2/37 reduction is calculated on the final Schedule A deduction total, incorporating items such as:

• State and local taxes up to the applicable SALT cap under Section 70120 (set at $40,400 for 2026)
• Mortgage interest on qualified residence debt up to $750,000 under Section 70108
• Charitable contributions subject to the 0.5% AGI floor under Section 70425
• Medical expenses exceeding 7.5% of AGI under existing rules
• Casualty and theft losses from federally or state-declared disasters under Section 70109

Notably, the legislation also made permanent the suspension of miscellaneous itemized deductions subject to the 2% AGI floor under Section 70110. This means unreimbursed employee expenses, investment fees, and tax preparation costs remain permanently non-deductible starting in 2026. The only exception is educator expenses, which are preserved as a permanent itemized deduction under Section 162.

Since the new cap is applied after all other limitations are in place, taxpayers should first account for the SALT cap, mortgage interest limits, and charitable contribution restrictions before calculating the 2/37 reduction. This sequencing matters because a smaller post-limitation deduction pool reduces the base on which the 2/37 ratio is applied. For a comprehensive guide to Schedule A eligibility, see IRS Publication 17 and IRS Publication 501.

It is also worth noting the interaction between the SALT cap and the new deduction limitation. For 2026, the SALT cap is $40,400 for most filers, with a phase-down for those earning above $505,000 in modified AGI. High-income taxpayers in states like California and New York often see their SALT deductions reduced significantly before the 2/37 cap is applied, which in turn reduces the Section 70111 reduction.

Strategies to reduce your exposure to the deduction cap

Several tax planning strategies can help top-bracket earners either reduce the size of their itemized deduction or lower their income enough to fall below the 37% threshold. The following approaches are worth evaluating before the end of the 2026 tax year.

Reducing taxable income is often the most direct response to the cap. Maximizing contributions to a Roth 401k does not reduce taxable income, but maximizing a traditional 401k contribution does. The IRS sets annual contribution limits for 401k plans, with additional catch-up contributions available for those 50 and older. Married couples who both contribute the maximum to their respective plans can meaningfully reduce their joint taxable income, potentially shifting them below or farther from the 37% bracket threshold.

Another powerful strategy is Tax loss harvesting within taxable investment accounts. Realizing capital losses to offset capital gains directly reduces taxable income, which in turn reduces taxable income above the 37% threshold and narrows the base on which the 2/37 reduction is calculated. This lowers both the cap's reach and your overall tax bill.

High-income earners who own a second home or vacation property may also find value in the Augusta rule, which allows homeowners to rent their residence for up to 14 days per year without reporting that rental income. While this does not directly affect itemized deductions, the excluded income contributes to a lower overall adjusted gross income, which can indirectly reduce your exposure to the cap.

Taxpayers with dependents should also make sure they are capturing every available Child & dependent tax credits benefit available under the OBBB Act, which permanently increased the Child tax credit to $2,200 per qualifying child starting with the 2025 tax year. While tax credits do not reduce itemized deductions, they directly reduce your final tax liability and are an important complement to any deduction strategy.

Before and after comparison for high-income filers

The shift from no Pease limitation (2018–2025) to the new OBBB cap in 2026 represents a meaningful change in the planning environment for top earners. During the TCJA years, taxpayers in the 37% bracket could claim the full value of their itemized deductions without any reduction. Starting in 2026, that full-value benefit is modestly reduced.

Consider a single filer with $800,000 in AGI and $100,000 in itemized deductions:

• Under TCJA (2018–2025): Full $100,000 deduction allowed, tax savings at 37% equals $37,000
• Under OBBB (2026 onward): Reduction of 2/37 multiplied by $100,000 equals $5,405; net deductions of $94,595; tax savings at 37% equals approximately $35,000; cap costs approximately $2,000 in additional taxes

This is a real cost, but it is substantially smaller than what the old Pease limitation would have produced at comparable income levels. In its final active year (2017), the Pease limitation applied to AGI above $261,500 for single filers and $313,800 for married filing jointly. Taxpayers who were subject to Pease before 2018 will recognize that the new cap is both more narrowly targeted and more predictable in its impact.

For those looking at oil and gas investments as part of their income management strategy, the Oil and gas deduction can generate substantial deductions that, while now subject to a modest reduction, still deliver significant tax savings even after applying the 2/37 cap. The net benefit remains well worth capturing.

State filing and coordination with federal changes

The new cap takes effect for 2026 federal returns, but many states do not conform automatically to federal itemized deduction limitations. This means the OBBB cap may not apply at the state level, preserving full state-level deduction benefits even when the federal benefit is modestly reduced.

High-income earners in California, New York, and other high-tax states should review state-specific filing requirements alongside their federal strategy. You can track your upcoming obligations through the 2026 California State Tax Deadlines and 2026 New York State Tax Deadlines pages.

Take control of your 2026 deductions with Instead

The new itemized deduction cap under the One Big Beautiful Bill Act is one of several changes high-income earners must navigate for the 2026 tax year. Staying ahead of these shifts requires proactive planning, accurate calculations, and a clear picture of how all your deductions interact across your full return.

Instead's comprehensive tax platform gives you the tools to model your exposure to the new cap, evaluate income reduction strategies, and identify which deductions still deliver maximum value under the updated rules. Instead's intelligent system helps you see exactly where the 2/37 reduction applies, how much it costs you, and what actions can reduce or eliminate its impact.

Get started today and explore Instead's pricing plans to find the right tier for your tax situation.

Frequently asked questions

Q: Does the new itemized deduction cap apply to all taxpayers?

A: No. The new cap under Section 70111 of the One Big Beautiful Bill Act applies only to taxpayers in the top 37% federal income tax bracket. For 2026, that means taxable income above $626,350 for single filers and above $751,600 for married filing jointly. Taxpayers below these thresholds are not affected.

Q: Does the new cap reduce the QBI deduction?

A: No. The One Big Beautiful Bill Act explicitly excluded the Section 199A qualified business income (QBI) deduction from the Section 68 limitation. Taxpayers who claim the QBI deduction will find that it is computed separately, without any reduction from the 2/37 cap.

Q: How does the new cap compare to the old Pease limitation?

A: The old Pease limitation reduced itemized deductions by 3% of adjusted gross income above a much lower income threshold, often producing larger reductions for high earners. The new OBBB cap uses the formula 2/37 of the lesser of total deductions or income above the 37% bracket threshold. For many taxpayers, the new cap produces a smaller reduction than Pease would have at comparable income levels.

Q: Can I avoid the cap entirely by reducing my taxable income?

A: Yes, in many cases. If strategic moves such as maximizing traditional 401k contributions, realizing capital losses through tax loss harvesting, or other income reduction strategies bring your taxable income below the 37% bracket threshold, the cap will not apply at all. Even partial income reductions below the threshold shrink the base used to calculate the 2/37 reduction.

Q: Which itemized deductions are most affected by the cap?

A: The cap applies to the total amount of your Schedule A deductions after all other limitations are already accounted for. This means charitable contributions, mortgage interest, state and local taxes up to the SALT limit, and eligible medical expenses are all part of the pool to which the 2/37 reduction applies. The QBI deduction is the only major deduction explicitly excluded.

Q: When does the new cap take effect?

A: The limitation on the tax benefit of itemized deductions under Section 70111 of the One Big Beautiful Bill Act applies to taxable years beginning after December 31, 2025. This means it applies to your 2026 federal income tax return, which will be filed in 2027.