In short
Pay by Jan 31. On Feb 1, a penalty and interest are added, and they grow each month. If taxes stay unpaid, more fees are added in July, and the taxing units can sue. In the end, a court can order the property sold. There are payment plans, and homeowners get extra protections.
The 30-second version
- Due: When you get the bill. Late: if not paid by Jan 31.1 For 2026 taxes, that is Sunday, Jan 31, 2027.2
- Feb 1: 6% penalty plus 1% interest (7% total) is added.32
- Each month after: penalty goes up 1% until it hits 12% on July 1. Interest keeps adding 1% a month.3
- July: an extra collection fee can be added for taxes still unpaid.3
- Help: payment plans, partial payments, and (for 65+/disabled) quarter payments.2
Ways to pay
The county tax office takes payments online, in person, at drop boxes, by mail, and by phone.2
- E-check online: no fee. Card: 2.15% fee, at least $2.50.2
- Online on time: paid by 11:59 p.m. Central time on Jan 31.2
- Partial payments: accepted, but the rest still goes late on Feb 1.12
- Prepayments: you can pay ahead toward next year’s bill.2
- Mortgage escrow: many owners pay through their lender. Check that the lender paid.
Quarter payments and payment plans
Owners 65+, disabled or disabled veterans can pay in four parts.1 Late homestead taxes can go on a 12 to 36 month plan.3 How both work: help paying property taxes.
How late charges add up
| If paid in… | Penalty | Interest | Total added |
|---|---|---|---|
| February | 6% | 1% | 7% |
| March | 7% | 2% | 9% |
| April | 8% | 3% | 11% |
| May | 9% | 4% | 13% |
| June | 10% | 5% | 15% |
| July (on or after July 1) | 12% | 6% | 18% |
Penalty and interest come from Tax Code §33.01.3 The table is our math from that section.4 Interest keeps adding 1% each month after July.
The July fee. Taxing units can hire a collection lawyer. For taxes still late on July 1, they can add a fee up to the amount in that contract. They must mail a notice first.3 (We could not find a set percent in the law text; ask the tax office what this county charges.)
Waivers. The law requires or allows penalty and interest to be waived in some cases, such as a tax office mistake. You must ask in writing within 180 days of the delinquency date.3
If taxes stay unpaid: lawsuit and sale
This part is explained neutrally. It is the legal process; it is rare compared to the number of bills.
- Lawsuit. Any time after taxes go late, a taxing unit can sue to collect. It can ask the court to enforce the tax lien on the property.3
- Costs grow. In a suit, lawyer fees of 15% can be added, plus court costs.3
- Pay to stop it. Paying the full amount before the sale ends the lien and stops the sale.3
- Judgment and sale. If the court rules for the units, the property can be sold at a public sale by a sheriff or constable.3
- Buying it back (redemption). A homestead or farm land owner has 2 years after the buyer’s deed is filed to buy it back. They pay what the buyer paid plus costs, plus a 25% premium in year one or 50% in year two. For other property, the window is 180 days.5
- Time limits. Challenges to a sale must be filed within 1 year, or 2 years for a homestead.3
Deferral instead. If you are 65+, disabled, or a disabled veteran, a deferral filed with WCAD can stop a suit on your home. Interest adds up at 5% a year, with no penalty.3 See property tax exemptions.
The other side (counterweight)
- The charges are set by state law, not by the county. Local units choose whether to add the July collection fee and hire a collection lawyer.3
- The charges stack. Penalty, interest, the July fee and lawyer fees in a suit can add up to much more than the tax itself.3
- The law also gives owners ways out. Payment plans, deferrals and the right to buy a sold home back are all in the law. Buying back costs a 25% or 50% premium.35
Questions to ask
- Where does the tax office post its collection-lawyer contract and fee?
- How does the tax office tell owners about late penalties before they apply?
Changes to this page
- Nov. 2, 2026: Added questions to ask.
- Nov. 2, 2026: Added a note that shows how we worked out the figures.
- Nov. 2, 2026: We checked every figure against its source. We replaced views we could not source with what the law itself says.
What you can do next
- If you can’t pay in full, pay what you can by Jan 31. It lowers the charges.2
- If you’re behind on a homestead, ask the tax office about a §33.02 plan before a suit is filed.
- If you are 65+ or disabled, ask about quarter payments or a deferral. Compare them: help paying property taxes.
Numbers marked “our math” are our estimates, not official figures. The notes show the inputs and the steps.
Footnotes
-
Texas Tax Code ch. 31, §§31.02 (due on receipt; late if not paid before Feb 1), 31.031 (quarter payments for 65+, disabled and disabled veterans), 31.07 (partial payments). https://statutes.capitol.texas.gov/Docs/TX/htm/TX.31.htm ↩ ↩2 ↩3
-
Williamson County Tax Office, “Payment Options” and “Property Tax” pages (online, in person, drop box, mail, phone; card fee 2.15%, $2.50 minimum; e-check; partial payments; prepayments; quarter plan due Jan 31, Mar 31, May 31, Jul 31; 2026 taxes due by Jan 31, 2027, with 7% penalty and interest on Feb 1, 2027). https://www.wilcotx.gov/755/Payment-Options; https://www.wilcotx.gov/propertytax (checked 2026-11-01) ↩ ↩2 ↩3 ↩4 ↩5 ↩6 ↩7 ↩8 ↩9
-
Texas Tax Code ch. 33, §§33.01 (penalty 6% the first month, plus 1% each month to 12% by July 1; interest 1% a month), 33.011 (waivers), 33.02 (homestead payment plans, 12–36 months), 33.06 (65+/disabled deferral, 5% interest), 33.07 (extra collection penalty for taxes still late on July 1), 33.41 (lawsuits), 33.48 (15% attorney fees in a suit), 33.53 (paying before the sale ends the lien), 33.54 (time limits to challenge a sale). https://statutes.capitol.texas.gov/Docs/TX/htm/TX.33.htm ↩ ↩2 ↩3 ↩4 ↩5 ↩6 ↩7 ↩8 ↩9 ↩10 ↩11 ↩12 ↩13 ↩14 ↩15 ↩16
-
Our math from §33.01: penalty 6% in February, then 1% more each month, to 12% on July 1; interest 1% a month. February 6% + 1% = 7%. March 7% + 2% = 9%. April 8% + 3% = 11%. May 9% + 4% = 13%. June 10% + 5% = 15%. July 12% + 6% = 18%. ↩
-
Texas Tax Code §34.21 (right of redemption: 2 years for a homestead or farm land, with a 25% premium in year one and 50% in year two; 180 days for other property). https://statutes.capitol.texas.gov/Docs/TX/htm/TX.34.htm ↩ ↩2