Yes, county taxes are generally deductible on your federal return, but only if you itemize on Schedule A and stay within the federal cap on state and local taxes. For 2026, that combined cap is $40,400 for most filers ($20,200 if married filing separately), a substantial increase from the $10,000 ceiling that applied from 2018 through 2025. Whether the deduction actually saves you anything depends on how your total itemized expenses stack up against the standard deduction.
Which County Taxes Qualify
Section 164 of the Internal Revenue Code treats county governments as political subdivisions whose taxes qualify for deduction the same way state taxes do.1Office of the Law Revision Counsel. 26 USC 164 – Taxes Three categories cover nearly every county-level tax most people pay:
- Real property taxes. The annual tax your county charges on land and buildings you own. It must be based on assessed value and levied for general public purposes, not earmarked for a specific improvement to your lot.
- Personal property taxes. Annual taxes based on the value of items like cars, boats, or RVs. Only the value-based portion counts. If your county charges a flat registration fee tied to weight or model year, that piece doesn’t qualify.
- Local income taxes or general sales taxes. You choose one or the other, never both. A county income tax gets bundled with your state income tax under the income option. If you live in a state without an income tax, the sales tax option usually works better.
To count as a deductible “general sales tax,” the rate has to match the standard rate on most retail purchases. If your county charges a higher rate on luxury goods, the excess portion isn’t deductible.1Office of the Law Revision Counsel. 26 USC 164 – Taxes
What Doesn’t Qualify
Plenty of charges appear on county bills without meeting the definition of a deductible tax. The IRS separates general-purpose taxes from fees for specific services or property improvements.
- Utility-type charges. Trash collection, water, and sewer fees are personal expenses, even when billed alongside property tax.2Internal Revenue Service. Topic No. 503, Deductible Taxes
- Special assessments for improvements. Charges for new sidewalks, road paving, or streetlights are treated as investments in your property, not deductible taxes. You can add them to your property’s tax basis, which reduces your taxable gain when you sell.1Office of the Law Revision Counsel. 26 USC 164 – Taxes
- Flat fees and permits. Building permits, zoning fees, and flat-rate vehicle registration charges don’t count.
Special assessments sometimes include a maintenance component, and the statute allows deducting that portion if you can separate it from the improvement portion. County billing statements rarely break this out, so most taxpayers end up adding the entire assessment to basis.
The 2026 SALT Cap
The One, Big, Beautiful Bill Act, signed in 2025, raised the state and local tax deduction cap from $10,000 to $40,400 for most filers ($20,200 for married filing separately) starting in tax year 2026.1Office of the Law Revision Counsel. 26 USC 164 – Taxes The cap rises 1% annually through 2029, then reverts to $10,000 in 2030 unless Congress extends it.
The cap covers your combined property, income, and sales tax deductions. A homeowner paying $12,000 in county property taxes, $8,000 in state income tax, and $3,000 in local income tax comes in at $23,000, well under the ceiling and fully deductible. Someone paying $30,000 in property taxes plus $20,000 in state income tax would lose $9,600 of that $50,000 total.
High-Income Phaseout
If your modified adjusted gross income exceeds $505,000 in 2026 ($252,500 for married filing separately), the $40,400 cap shrinks by 30 cents for every dollar over the threshold. It can’t drop below $10,000, so fully phased-out taxpayers still get the pre-2026 amount.
Itemize or Take the Standard Deduction
None of this matters unless you itemize on Schedule A.3IRS. 2025 Instructions for Schedule A (Form 1040) For 2026, the standard deduction is:
- Single or married filing separately: $16,100
- Married filing jointly or surviving spouse: $32,200
- Head of household: $24,150
These amounts reflect inflation adjustments under the One, Big, Beautiful Bill Act.4Internal Revenue Service. IRS Releases Tax Inflation Adjustments for Tax Year 2026, Including Amendments From the One, Big, Beautiful Bill Add your county and state taxes (capped), mortgage interest, charitable contributions, and any other itemized deductions. If the total beats the standard deduction, itemize. If not, take the standard deduction. For a married couple with a modest mortgage and average property taxes, $32,200 is a high bar.
When You Get to Deduct
You deduct county taxes in the year you actually pay them, not the year they’re assessed or billed. A 2026 property tax bill paid in January 2027 belongs on the 2027 return.
If your mortgage lender pays property taxes from escrow, the taxes count as paid when the lender sends the money to the county, not when you make your monthly mortgage payment. Box 10 of your lender’s Form 1098 reports the total property taxes disbursed from escrow during the year.5Internal Revenue Service. Instructions for Form 1098 – Introductory Material
If You Bought or Sold a Home
Buyer and seller split the property tax deduction based on how many days each owned the home during the year. The day of sale itself doesn’t count toward the seller’s share.6Internal Revenue Service. Publication 523, Selling Your Home
Who actually wrote the check to the county doesn’t matter. If the buyer paid the full annual tax at closing, the seller still deducts a proportional share and includes that amount in the sale price; the buyer deducts only the portion covering days of ownership and adds the seller’s share to cost basis. Publication 523 walks through the exact calculation.
Records to Keep
If the IRS questions your deduction, you’ll need to show what you paid, when, and to whom. Organized by calendar year, these documents cover most situations:
- The county assessor’s annual property tax statement, plus the receipt or bank record showing the date paid.
- Form 1098 from your mortgage lender, with Box 10 reporting escrow-paid property taxes.5Internal Revenue Service. Instructions for Form 1098 – Introductory Material
- Vehicle registration statements that separate the value-based (ad valorem) tax from flat fees.
- W-2s showing state and local income tax withholding, or estimated payment receipts if you’re self-employed.
- Closing statements from any home purchase or sale during the year, showing how property taxes were prorated.
Claiming taxes you didn’t pay, or overstating the value-based portion of a vehicle fee, can trigger the accuracy-related penalty of 20% of the underpayment, plus interest.7eCFR. 26 CFR 1.6662-2 – Accuracy-Related Penalty