2026 SALT Deduction: Who Can Claim Up to $40,400?

The 2026 state and local tax (SALT) deduction limit is $40,400 for most filing statuses, compared with $40,000 in 2025. That headline gets attention—especially in states like New York and New Jersey. But a higher cap doesn’t mean every homeowner gets a $40,400 deduction.

Here’s the simpler way to talk about it with clients.

First: the cap is not the deduction

A taxpayer generally deducts eligible state and local income or sales taxes, plus qualifying real estate and personal property taxes, subject to the applicable limit. If they paid $18,000 of qualifying taxes, their deduction doesn’t suddenly become $40,400.

For 2026, the overall cap is $40,400, or $20,200 for married taxpayers filing separately. High-income taxpayers face a reduction beginning at modified adjusted gross income (MAGI) above $505,000, or $252,500 for married filing separately. The reduced limit cannot fall below $10,000, or $5,000 for married filing separately.

What can go into that total? Generally, eligible state or local income taxes or sales taxes, real estate taxes and certain value-based personal property taxes. It’s one or the other for income versus sales tax—not both. Property taxes connected to a rental or business may belong on another schedule and should not also be claimed personally on Schedule A.

Be careful with a client’s estimate of “property taxes,” too. Water charges, trash collection fees and assessments for specific improvements are not all the same thing as deductible real estate tax. Ask for the actual statement and the payment date. A rounded number from memory is not enough for a meaningful comparison.

Then: check the income phase-down

Take a married couple filing jointly with $540,000 of MAGI and $52,000 of qualifying state and local taxes. Their income exceeds the $505,000 threshold by $35,000. Thirty percent of that excess is $10,500.

That reduces the $40,400 ceiling to $29,900. Because they paid more than that in qualifying taxes, $29,900 is the potential SALT deduction—not $52,000 and not $40,400.

The point isn’t to memorize the formula. It’s to remember that the cap can shrink as income rises.

For married taxpayers filing separately, the phase-down mechanics deserve a second look. The calculation isn’t simply “take 30% off the $20,200 amount” in the same way as the joint-filer example. The applicable worksheet calculates the reduction against the full statutory cap and then halves the result. Rather than do that from memory, follow the correct Schedule A worksheet and check the client’s MAGI carefully.

And don’t forget what that income-related reduction means during planning. A year-end bonus or capital gain could reduce the allowable SALT limit for someone in the phase-down range. Sometimes the better conversation is about timing other taxable income, not paying more state tax.

Finally: does itemizing make sense?

SALT is one piece of Schedule A. A client may have eligible property taxes, state income taxes, mortgage interest and charitable contributions and still benefit more from the standard deduction. For 2026, the standard deduction is $16,100 for single filers, $24,150 for heads of household and $32,200 for married couples filing jointly.

The charitable rules changed in 2026, too. Don’t overlook the new deduction for qualifying cash gifts by non-itemizers, or the floor applied to itemized charitable contributions.

Before recommending an itemized return, compare the complete result both ways.

Here’s another example of why the full comparison matters. Imagine a married couple with $23,800 in qualifying SALT, $6,100 in mortgage interest and $3,000 in qualifying cash gifts. Their itemized deductions need to be computed with the applicable 2026 charitable floor. Even though their SALT is well under the new cap, the finished Schedule A total could still be lower than the $32,200 standard deduction.

This isn’t an argument against itemizing. It’s an argument against looking at just one line of the return. Run both options after you have complete figures, including any deduction available to a non-itemizer for qualifying cash contributions.

What to ask clients now

• How much state income tax was withheld, and were estimated state payments made?
• What property taxes were assessed and paid in 2026?
• Are any taxes related to a rental or business already deducted elsewhere?
• Does itemizing beat the standard deduction after all applicable adjustments?

If a client wants to prepay a bill before December 31, first verify that the tax has actually been assessed and can be deducted when paid. Then review whether moving that payment changes the standard-versus-itemized outcome. Paying $5,000 early to gain a deduction that doesn’t help the return isn’t the kind of “tax strategy” anyone wants.

The takeaway: A bigger SALT cap creates planning opportunities, not automatic savings. Run the client’s actual numbers before projecting a refund. Our 1040 Tax Prep Guide 2026 includes worked examples and guidance on individual deductions and itemizing.

Official source: IRS — Correction to the 2026 SALT limit.

For general education for tax professionals; reviewed October 23, 2026. Confirm current forms and guidance before relying on tax-law details.