2026 SALT Deduction Limit: How the $40,400 Cap Affects California Taxpayers

The federal deduction for state and local taxes changed significantly beginning in 2025, and the higher temporary limit increases slightly for 2026.. Taxpayers who itemize deductions may claim up to $40,400 of eligible state and local taxes. The limit is $20,200 for married taxpayers filing separately. For many California taxpayers, the higher limit creates a meaningful federal deduction, but income phaseouts, property taxes, payment timing, the itemized deduction benefit limitation for taxpayers in the 37 percent bracket, and the California PTE elective tax can materially change the result.

2026 SALT limits at a glance

• $40,400 maximum deduction for most filing statuses
• $20,200 maximum deduction for married filing separately
• $505,000 modified adjusted gross income threshold for the phaseout
• $252,500 phaseout threshold for married filing separately
• $10,000 minimum limit after the phaseout
• $5,000 minimum limit for married filing separately

The higher deduction is temporary under current federal law. The personal SALT deduction limit is scheduled to return to $10,000 beginning in 2030 unless Congress changes the law.

What the SALT deduction includes

SALT means state and local taxes. For an individual taxpayer, the federal itemized deduction generally combines the following personal taxes into one limit:

• California income tax withheld from wages, retirement distributions, and other payments
• California estimated income tax payments
• California income tax balances paid during the year, even when the payment relates to a prior tax year
• Real property taxes paid on a primary residence, second home, or other personal real estate
• Qualifying personal property taxes based on value

The $40,400 limit is not a separate limit for income tax and property tax. These taxes share one combined limit. Federal law also permits a taxpayer to deduct either state and local income taxes or general sales taxes, but not both.

Taxes properly attributable to a trade, business, rental property, or other income producing activity are generally deducted in computing the income from that activity rather than as a personal Schedule A deduction. Those properly allocated business and rental taxes generally do not use the personal SALT limit.

How the 2026 income phaseout works

The full $40,400 limit is available when modified adjusted gross income does not exceed $505,000. Above that threshold, the limit is reduced by 30 percent of the excess modified adjusted gross income.

Example with $550,000 of modified adjusted gross income

The taxpayer is $45,000 above the $505,000 threshold. Thirty percent of $45,000 is $13,500. The $40,400 limit is reduced to $26,900.

Example with $600,000 of modified adjusted gross income

The taxpayer is $95,000 above the threshold. Thirty percent of $95,000 is $28,500. The $40,400 limit is reduced to $11,900.

The limit cannot be reduced below $10,000. The minimum is reached at modified adjusted gross income of approximately $606,334. For married taxpayers filing separately, the starting limit, phaseout threshold, and minimum are $20,200, $252,500, and $5,000.

For this rule, modified adjusted gross income is adjusted gross income increased by amounts excluded under the foreign earned income and certain territorial income provisions. For most California taxpayers without those exclusions, modified adjusted gross income will equal adjusted gross income.

California income tax and property tax compete for the same deduction

California taxpayers can reach the federal SALT limit quickly. Consider a taxpayer with $32,000 of California income tax payments and $15,000 of personal real property taxes. Total eligible taxes are $47,000. If the taxpayer is below the income phaseout threshold, the federal deduction is limited to $40,400. The remaining $6,600 does not produce a Schedule A deduction.

This competition matters when deciding whether to accelerate a California estimate or a property tax installment. Paying an additional tax before year end does not create a federal benefit when the taxpayer has already filled the available limit. A projection should first calculate the taxpayer's actual limit after the income phaseout and then compare that limit with the taxes already paid.

Estimated payment and year end timing

Individual taxpayers generally deduct state and local taxes in the year the taxes are paid. This creates a planning decision because the fourth California estimated tax installment for 2026 is due January 15, 2027.

A 2026 California estimated payment made in January 2027 generally becomes a 2027 federal itemized deduction. A payment made by December 31, 2026 may be included in the 2026 SALT total when it is based on a reasonable and good faith estimate of the actual California tax liability.

A taxpayer should not make an excessive state payment solely to create a deduction. The payment must represent a bona fide estimate of tax due. If the payment later produces a state refund, the federal tax benefit rule may require some or all of the refund to be included in income.

California real property tax timing can also matter. The second regular secured property tax installment is due February 1 and becomes delinquent after April 10. When the installment has already been assessed and the county accepts the payment, paying it by December 31 may move the federal deduction into the current year. The strategy only helps when the taxpayer has unused SALT capacity and receives a benefit from itemizing.

Taxpayers who pay property taxes through an escrow account generally deduct the amount the lender actually pays to the county during the year. Depositing money into escrow is not itself a property tax payment.

Year end SALT planning requires a full tax projection

The analysis should include projected income, the SALT phaseout, itemized deductions, alternative minimum tax, the itemized deduction benefit limitation, California estimates, property taxes, and business entity elections.

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How the California PTE elective tax interacts with the SALT limit

The California PTE elective tax can provide a different route to a federal state tax deduction for qualifying owners of partnerships and S corporations. For taxable years 2026 through 2030, an eligible entity may elect to pay California tax at a rate of 9.3 percent on qualified net income attributable to consenting qualified taxpayers.

Under IRS Notice 2020‑75, Specified Income Tax Payments, as described in the notice, imposed on and paid by a partnership or S corporation are generally deducted by the entity in computing its federal income. The deduction reduces income passed through to the owners and is not claimed as an individual Schedule A deduction. It therefore does not use the owner's personal $40,400 SALT limit.

Basic PTE tax example

Assume an eligible entity includes $100,000 of an owner's income in qualified net income and pays $9,300 of California PTE elective tax. Subject to the election and payment rules, the entity generally receives a federal deduction for the payment and the owner receives a California credit based on the qualified amount.

The federal deduction is reflected in the owner's pass through income rather than added to the owner's personal SALT deduction.

The timing of the entity payment is critical. The federal deduction generally follows the taxable year in which the entity pays the PTE tax. A payment made by December 31, 2026 generally supports a 2026 federal deduction. A remaining balance paid in 2027 generally produces a 2027 federal deduction, even when the California credit relates to the 2026 election.

For a calendar year entity, the required initial payment for a 2026 election was due June 15, 2026. The required amount was the greater of $1,000 or 50 percent of the PTE elective tax paid for the prior taxable year.

Beginning with the 2026 taxable year, missing or underpaying the June 15 amount no longer automatically prevents the entity from making the election. However, each qualified taxpayer's credit is reduced by 12.5 percent of that taxpayer's share of the required payment amount that was not paid by June 15.

The remaining PTE elective tax is due by the original due date of the entity return without regard to an extension. The election must be made on a timely filed original return and is irrevocable for that taxable year.

The PTE election should still be modeled before payment. The entity deduction can reduce qualified business income for the federal Section 199A deduction. An owner may need to carry forward an unused California PTE credit for as many as five years. The credit also cannot reduce California's 1 percent Behavioral Health Services Tax. California individual estimates should be coordinated with the expected credit to reduce unnecessary overpayments.

When the higher SALT limit may not produce tax savings

A higher limit does not guarantee a larger federal tax benefit. The result may be limited when:

• The taxpayer's standard deduction exceeds total itemized deductions
• Modified adjusted gross income reduces the limit toward $10,000
• The taxpayer is subject to alternative minimum tax, which generally disallows the personal state and local tax deduction
• The taxpayer is in the 37 percent bracket and the separate itemized deduction benefit limitation reduces the federal value of itemized deductions
• California income tax payments have already used the available limit before property taxes are considered
• A PTE elective tax deduction has already shifted part of the state tax expense to the business entity
• Accelerating a payment creates a deduction in one year but leaves less deduction available in the following year

The SALT deduction reduces taxable income. It is not a dollar for dollar credit. The actual savings depend on the taxpayer's federal marginal rate, alternative minimum tax position, itemized deductions, the itemized deduction benefit limitation, and the timing of income and payments.

2026 planning steps for California taxpayers

1. Project 2026 adjusted gross income and modified adjusted gross income.
2. Calculate the SALT limit after applying the income phaseout.
3. Total California withholding, estimates, prior year balances paid in 2026, and personal property taxes.
4. Compare itemized deductions with the standard deduction and test alternative minimum tax.
5. Model the separate itemized deduction benefit limitation if the taxpayer may be in the 37 percent bracket.
6. Determine whether a December California estimate or property tax payment creates an actual federal benefit.
7. For business owners, compare the PTE elective tax with the individual SALT deduction and model the effect on qualified business income.
8. Coordinate California estimates and PTE credits to avoid unnecessary overpayments.

The planning opportunity is broader than the new limit

The 2026 $40,400 SALT limit can create a larger deduction for California taxpayers, but the best result depends on much more than the headline number. Income near the $505,000 phaseout threshold, large property tax bills, the timing of California payments, alternative minimum tax, the itemized deduction benefit limitation, and the PTE elective tax should be analyzed together.

A year end projection can identify whether additional payments should be made in 2026, deferred to 2027, or paid through an eligible business entity. The objective is not simply to maximize taxes paid before December 31. The objective is to place deductible payments in the year and on the return where they produce the greatest after tax benefit.

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Technical references

Internal Revenue Code Sections 56, 68, 164, 703, 1363, and 1366; Treasury Regulation Section 1.164‑1; Revenue Ruling 71‑190; Revenue Ruling 82‑208; IRS Notice 2020‑75; California Revenue and Taxation Code Sections 17052.11, 19910, 19912, 19914, and 19916.

IRS confirmation of the 2026 SALT limits
IRS Notice 2020‑75 concerning PTE tax deductions
California PTE elective tax rules