Williamson County, TX property tax deadlines
10 coming property tax dates for Williamson County, Texas. Each one links to its official source and shows the day LevyDay last checked it.
| Next dates | Bills due | Last day without penalty | Appeal by | Exemption filing |
|---|---|---|---|---|
| Williamson | Nov 30, 2026comptroller.texas.govOct 21 | Jan 31, 2027tax.wilcotx.govOct 21 | May 15, 2027 Satcomptroller.texas.govOct 21 | Apr 30, 2027comptroller.texas.govOct 21 |
Deadlines in date order
| Date and source | Deadline |
|---|---|
| January 31 every yearcomptroller.texas.govOct 21 | Last day without penalty Last day to pay before penalty and interest Unpaid taxes turn delinquent on Feb. 1. If your bill was mailed after Jan. 10, you get until the first day of the next month that leaves at least 21 days to pay. A weekend or holiday moves it to the next working day. |
| January 31 every yeartax.wilcotx.govOct 21 | Bills due Quarter Pay, payment 11 |
| January 31, 2027 2027 onlytax.wilcotx.govOct 21 | Last day without penalty Pay 2026 taxes The county lists Sunday, Jan. 31, 2027 as the last day and Feb. 1, 2027 as the delinquency date, when 7% penalty and interest are added. Mail must be postmarked by Jan. 31. |
| March 31 every yeartax.wilcotx.govOct 21 | Bills due Quarter Pay, payment 21 |
| April 30 every yearcomptroller.texas.govOct 21 | Exemption filing File for homestead and other exemptions The law says before May 1, so April 30 is the last day. File with the appraisal district. |
| May 15 every yearcomptroller.texas.govOct 21 | Appeal deadline Protest your value May 15 or 30 days after the appraisal district mails your value notice, whichever is later. |
| May 31 every yeartax.wilcotx.govOct 21 | Bills due Quarter Pay, payment 31 |
| June 30 every yearcomptroller.texas.govOct 21 | Last day without penalty Split payment: pay the second half Only where the taxing unit offers split payments. The penalty on the second half starts July 1. |
| July 31 every yeartax.wilcotx.govOct 21 | Bills due Quarter Pay, last payment1 |
| November 30 every yearcomptroller.texas.govOct 21 | Bills due Split payment: first half due Only where the taxing unit offers split payments. Miss this half and you can't split the bill. |
- For homesteads with an over-65, disability, disabled veteran or surviving spouse exemption.
Appealing your assessed value
Appeal by May 15, 2027 in 204 dayscomptroller.texas.govOct 21
If you think the county valued your home too high, you can appeal. Filing with the county is free and you can do it yourself.
Get help filing an appeal
After you send your details, we look for an independent appeal firm or attorney to take your case. We'll be in touch once one has agreed. Firms usually charge a share of what you save, and the one that takes it may pay LevyDay a referral fee.
LevyDay doesn't file appeals or give legal or tax advice. We only pass your details on. The independent firm or attorney that takes your case does the work and sets its own fee.
Get help filing an appealIf you pay late
- Paying late: A 6% penalty in the first month, plus 1% more each month until July 1, when it is 12%. Interest adds 1% a month on top. A missed quarter payment gets a 6% penalty plus interest. tcss.legis.texas.govOct 21
- Collection penalty: If your taxing unit hires a private attorney to collect late taxes, it can add a penalty of up to 20% to cover their fees. comptroller.texas.govOct 21
Good to know in Texas
- Appealing your value: To protest your value, file Form 50-132, Property Owner's Notice of Protest, with the appraisal review board (ARB). A written notice that names the property, the owner and what you disagree with also works. More comptroller.texas.govOct 21
- Homestead exemption: The general residence homestead exemption is for a home you own and use as your principal residence. School districts must exempt $140,000 of its value. More comptroller.texas.govOct 21
- Second homes and rentals: Starting in 2024, real property valued at $5,000,000 or less that isn't a homestead gets a 20% limit. Its appraised value can't rise more than 20% a year unless new improvements are made. More
Official offices
Places in Williamson County
They are: Austin, Bartlett, Brushy Creek, Cedar Park, Coupland, Florence, Georgetown, Granger, Hutto, Jarrell, Leander, Liberty Hill, Pflugerville, Round Rock, Santa Rita Ranch, Serenada, Sonterra, Taylor, Thorndale, Thrall, Weir. Every place in the county gets the dates above.
Nearby in the Texas list
WebbWhartonWheelerWichitaWilbargerWillacyWilsonWinklerWiseWoodYoakumYoung