SALT Cap 2026: $40,000 Limit Explained for Business Owners

The SALT cap limits how much state and local tax you can deduct when you itemize. For 2026, the cap is $40,400 ($20,200 if married filing separately), up from $40,000 in 2025, and it shrinks by 30% of modified adjusted gross income above $505,000, down to a floor of $10,000. Taxes paid by your business or on rental property are generally deducted outside the cap.

The One Big Beautiful Bill Act, signed in July 2025, quadrupled the old $10,000 limit, which changes whether many homeowners and business owners should itemize. This guide covers the 2026 numbers, the phase-down math, how SALT interacts with business taxes and the pass-through entity tax, two worked examples, and planning moves. It is general information, not tax advice; check your own figures with a tax professional.

SALT cap 2026 at a glance

Tax year	Cap (single or joint)	Cap (married filing separately)	MAGI phase-down threshold (joint and single)
2017 to 2024	$10,000	$5,000	None
2025	$40,000	$20,000	$500,000
2026	$40,400	$20,200	$505,000
2027 to 2029	Rises 1% a year	Half of the full cap	Rises 1% a year
2030 onward	$10,000	$5,000	None

Above the threshold, the cap is reduced by 30% of the excess but not below $10,000. These figures are summarized by Kiplinger and Thomson Reuters. The threshold for married filing separately is half the joint figure. For the full list of other changes in the same law, see our guide to the One Big Beautiful Bill for small businesses.

What counts toward the SALT cap?

The SALT deduction is an itemized deduction on Schedule A. It includes:

• State and local income taxes withheld or paid, including estimated payments, or alternatively state and local general sales taxes (you choose one, not both).
• Real estate taxes on your home and other personal property.
• Personal property taxes based on value, such as some vehicle registration fees.

Foreign real property taxes are not deductible at all, and transfer taxes and special assessments for improvements generally are not deductible as SALT.

Business and rental taxes: outside the cap

The cap applies to personal itemized deductions. Taxes paid or accrued in carrying on a trade or business, or in an activity that produces rental income, are deducted on the business or rental schedule and are not subject to the cap.

Tax	Where deducted	Subject to SALT cap?
Property tax on your home	Schedule A	Yes
Property tax on a rental property	Schedule E	No
Property tax on business premises or equipment	Schedule C or business return	No
State income tax on sole proprietor profit	Schedule A	Yes, it is a personal income tax
Pass-through entity tax paid by a partnership or S corporation	Entity return	No, deducted by the entity
Sales tax collected from customers	Not your expense; remitted to the state	Not applicable

The home office share of your property tax is a business expense when you claim the home office deduction, with the rest staying on Schedule A. The pass-through entity tax workaround is explained in detail in our guide to pass-through entity tax by state.

How the SALT cap phase-down works

1. Compute your modified adjusted gross income (AGI plus certain excluded foreign income).
2. Subtract the threshold, $505,000 for 2026, or $252,500 if married filing separately.
3. Multiply the excess by 30%.
4. Subtract that from $40,400. If the result is below $10,000, use $10,000.
5. Your deduction is the smaller of your actual SALT paid and this adjusted cap.

A joint filer reaches the $10,000 floor at roughly $606,333 of MAGI in 2026. Between $505,000 and that point, every extra $1,000 of income removes $300 of deduction. In the 35% bracket that adds about 10.5 percentage points to your effective marginal rate on that income, sometimes called the SALT torpedo.

Worked examples

These scenarios are illustrative and simplified.

Example 1: consultants in a high-tax state

A married couple, both self-employed consultants, have MAGI of $350,000. They pay $22,000 in state income tax and $14,000 in property tax on their home, a total of $36,000. Their MAGI is below the threshold, so the full $40,400 cap applies, and they deduct all $36,000. Adding $12,000 of mortgage interest and $5,000 of charitable gifts gives $53,000 of itemized deductions versus a $32,200 standard deduction. Itemizing increases their deductions by $20,800, worth roughly $6,600 at a 32% bracket. Under the old $10,000 cap they would have itemized only $27,000 and taken the standard deduction instead.

Example 2: high earners in the phase-down zone

Another couple has MAGI of $560,000 and pays $48,000 of state and local tax.

Step	Amount
MAGI over $505,000	$55,000
Reduction (30% of excess)	$16,500
Adjusted cap ($40,400 minus $16,500)	$23,900
SALT actually deductible	$23,900 of the $48,000 paid

If they own an S corporation in a state with a PTET election, paying state tax at the entity level could move much of the remaining $24,100 out of the cap entirely.

Planning moves for 2026

• Re-run the itemize vs standard decision. Many taxpayers who stopped itemizing in 2018 should check again.
• Manage MAGI near $505,000. Retirement contributions, timing of invoices and year-end expenses, and the timing of capital gains can keep you below the threshold. Our year-end tax planning checklist covers timing ideas, including when to send December invoices if you use the cash method.
• Pay your fourth-quarter state estimate in December if it fits under your cap and you itemize, rather than in January. See quarterly estimated taxes for due dates.
• Elect PTET where available if you run a partnership or S corporation.
• Bunch deductions. In some cases, paying two years of property tax in one year (where allowed) and taking the standard deduction the next can raise the two-year total.
• Remember the 2030 cliff. Multi-year plans should assume the cap falls back to $10,000 unless Congress acts.

Sole proprietors: state income tax on business profit

A common surprise for freelancers is that state income tax on Schedule C profit is not a business expense. It is a personal tax, deducted only on Schedule A and only up to the SALT cap. A consultant who pays $18,000 of state income tax because of a profitable year cannot move it to Schedule C. The workarounds are structural: an S corporation or partnership in a state with a PTET election can pay the tax at the entity level, where it is deductible without the cap. Whether the extra cost of running an S corporation is worth it depends on your profit; see S corp vs LLC.

Sales tax instead of income tax

You can deduct either state and local income taxes or general sales taxes, not both. Residents of states without an income tax almost always choose sales tax, using either actual receipts or the IRS optional sales tax tables plus sales tax on major purchases such as a vehicle or boat. In a year when you buy a car or renovate a home, the sales tax option can beat a small state income tax bill even in an income tax state.

Married couples and the SALT cap

The $40,400 cap for 2026 is the same for a single person and a married couple filing jointly, while married filing separately gets half. Two unmarried homeowners living together can each claim up to the full cap on their own property and income taxes, but the same couple married shares one cap. Filing separately rarely helps, because it splits the cap and changes many other rules. Run both versions if your SALT is far above $40,400 and one spouse has most of the income, but expect joint filing to win in most cases.

Common SALT mistakes

• Putting rental property tax on Schedule A instead of Schedule E, where it is not capped.
• Deducting state income tax refunds twice. If you deducted state tax last year and received a refund, part of it may be taxable this year.
• Prepaying taxes not yet assessed. Prepaid property tax is deductible only if assessed and paid in the year.
• Ignoring state rules. Your state may not allow a deduction for state income tax on the state return, and many states have their own itemizing rules.
• Forgetting MAGI includes business profit. A strong year for your business can push you into the phase-down.

What to do if you missed the higher cap on your 2025 return

The $40,000 cap applied from the 2025 tax year. If you took the standard deduction on your 2025 return out of habit, or your software still applied the old $10,000 limit, compare itemizing with the actual numbers. If itemizing would have produced a larger deduction, you can generally file an amended return within the normal time limits; see our guide to the amended tax return (Form 1040-X). Also check your 2026 withholding and estimated payments, since a larger deduction may mean you are now overpaying through the year.

SALT cap and where you live

The cap matters most in states with high income and property taxes. If you are considering relocating, read our guide to states with no income tax; moving changes your SALT picture more than any deduction strategy. Federal brackets still apply wherever you live; see 2026 federal tax brackets.

Accurate income records make every tax calculation easier, including your MAGI. Track client billing with our free invoice generator: no sign-up, and download every invoice as a PDF for your books.