Sales tax · Texas · rates effective October 1, 2026
Knox County Sales Tax Rate: 6.25%
Buy something in Knox County and 6.25% is added at the register. Of that, all of it is the state rate; no local tax is levied here. Enter a purchase amount to see the dollars each authority gets.
On a $100.00 purchase in Knox County you pay $6.25 in sales tax, 6.25% in all, for a total of $106.25.
| Levied by | Rate | Tax on $100.00 | In effect since |
|---|---|---|---|
| State of Texas · state | 6.25% | $6.25 | 2026-10-01 |
| Combined rate | 6.25% | $6.25 |
Note. This county levies no county sales tax; cities and districts inside it may.
Cities in Knox County
Inside a city the city's own tax applies on top of the county's. Outside any city, the county rate above applies.
Methodology
How the combined rate is built
A sales tax rate is a sum. The state sets one rate for every sale in the state; the county, the city and any special district (transit authority, hospital district, improvement district) the address sits in each add their own. The combined rate is those components added together, and the page lists every one with the authority that levies it and the date it took effect, so the total can be checked line by line.
Combined rate = state rate + county rate + city rate + district rates Tax = purchase amount × combined rate ÷ 100
Source and effective date
Every rate on this page comes from the Texas Comptroller of Public Accounts, City Sales and Use Tax rates (spreadsheet) and County Sales and Use Tax table, the file dated October 1, 2026 with rates effective October 1, 2026, read on October 8, 2026. The file states one effective date for the whole table and none per jurisdiction, so every component is dated by it. Sales tax rates are not tax-year figures: they change on the first day of a quarter, most often January, April, July and October 1. The snapshot behind these pages is rebuilt from the DOR file on the fifth of those months.
- Texas law caps the combined local rate at 2%, so no address pays more than 8.25% (Tax Code §321.101 and §323.101 as the Comptroller states it).
- Rows whose total in the Comptroller's spreadsheet does not equal the sum of its own components are left out rather than guessed at (2 this issue: Sandy Point (Brazoria County), Waller/Waller-Harris ESD 200 (Harris County)).
- The Comptroller's spreadsheet carries no effective date per city; city, district and transit components are dated by the quarter the spreadsheet covers. County dates come from the Comptroller's county table.
Limitations
- General merchandise only. Groceries, prepared food, lodging, motor vehicles, fuel, alcohol and services are taxed at different rates or not at all, and that differs by state and within Knox County.
- A ZIP code is not a jurisdiction. ZIP codes cross county, city and district lines, so a receipt's ZIP does not set the rate; the taxing jurisdictions the address sits in do. That is why there are no ZIP pages here.
- Where the rate is measured. Texas is an origin-based state: for sales inside the state, the rate at the seller's location applies, not the buyer's.
- Special districts that cover part of a jurisdiction (an address-range improvement district, a transit area that stops at a road) are listed under "other rate areas" where the DOR lists them and left out where it lists them only by address.
- Caps and thresholds (a surtax that applies only to the first $5,000 of an item, a maximum tax per sale) are not modeled; the split assumes the full rate on the full amount.
Last reviewed: October 2026. The state table was checked against each revenue department's page on October 8, 2026; the local snapshots are refreshed from the DOR files every quarter and checked by scripts/check-sales-tax.mjs before each deploy.
Frequently asked questions
What is the sales tax rate in Knox County?
6.25% on general merchandise, as published by the Texas Comptroller of Public Accounts, City Sales and Use Tax rates (spreadsheet) and County Sales and Use Tax table for rates effective October 1, 2026. It is the sum of 6.25% (State of Texas).
How much sales tax is that on a $100 purchase in Knox County?
$6.25 on a $100 purchase, for a total of $106.25. The calculator above splits any amount by the authority that receives each part.
Does the ZIP code on my receipt set the Knox County rate?
No. Sales tax is set by the taxing jurisdictions the address sits in (state, county, city and any special district), and ZIP codes routinely cross those lines. A Texas address in the same ZIP but outside the county can carry a different rate.
Does the 6.25% rate apply to groceries, restaurant meals, hotels and cars in Knox County?
Not necessarily. The rate here is the general merchandise rate. Texas, like most states, taxes some of those differently: groceries may be exempt or reduced, prepared food, lodging and vehicles often carry their own rates, and many services are untaxed. Check the Texas Comptroller of Public Accounts, City Sales and Use Tax rates (spreadsheet) and County Sales and Use Tax table for the category.
Related tools
State income tax calculators for all 50 states and DC — select your state to see its bracket structure and compute your liability, with each rate cited to the state revenue department.
Open tool →State Income Tax ComparisonCompare 2026 state income tax across all 50 states and DC for your income level — effective rates ranked lowest to highest, every figure cited to each state's revenue department.
Open tool →Total Tax Burden CalculatorSee your complete 2026 tax picture in one place — federal income tax, Social Security, Medicare, and state income tax combined into a single effective rate and take-home pay figure.
Open tool →