The City of Round Rock appears in both the Williamson County and the Travis County 2026 tax rate tables, which means it taxes property in both counties. Cedar Park, Leander and Pflugerville do too. The county line changes three things: which appraisal district values the house, which county rates apply, and which county exemptions you get. The city, school district and ACC rates are the same on both sides.
The short version
- Round Rock, Cedar Park, Leander and Pflugerville all appear in both counties' 2026 rate tables.
- On the Travis side, Travis County and Central Health replace Williamson County's two lines.
- Travis County gives a 20 percent homestead exemption. Check the parcel before you estimate.
Key facts, checked October 15, 2026
- Travis County 0.38621 and the Travis County Healthcare District (Central Health) 0.132863 per $100 for 2026. Source: Travis County Tax Office, 2026 Truth in Taxation rate table.
- Williamson County 0.381218 general rate plus 0.040329 road rate (FM/RD) per $100 for 2026. Source: Williamson County Tax Assessor-Collector, 2026 Tax Rate Information (Truth in Taxation Summary).
- City of Round Rock 0.423 and Round Rock ISD 0.9484 per $100 in both counties' 2026 tables. Source: Travis County Tax Office, 2026 Truth in Taxation rate table.
- Travis County homestead exemption: 20 percent with a $5,000 minimum. Over-65 and disabled: $145,269. Source: Travis Central Appraisal District, 2026 Exemption Listing (July 19, 2026).
Which appraisal district values the house
The county decides who sets the value and where you file. Williamson County homes go through the Williamson Central Appraisal District (WCAD). Travis County homes go through the Travis Central Appraisal District (TCAD), which takes homestead applications online, by mail, or at its office at 850 East Anderson Lane. You file your homestead with the district for the county the house is in, and you protest your value there too.
The county lines on the bill
On a Williamson-side home, the county lines are Williamson County's general rate of 0.381218 and its road rate of 0.040329. On a Travis-side home, they are Travis County at 0.38621 and Central Health at 0.132863. Before exemptions, the Travis pair adds up to 0.519073 per $100 and the Williamson pair to 0.421547. That is a difference of about $98 per $100,000 of taxable value.
Exemptions narrow that gap. TCAD's 2026 listing shows Travis County giving a 20 percent homestead exemption with a $5,000 minimum, and $145,269 for owners 65 or older or disabled. Any taxing unit can adopt its own optional exemptions, so I run the numbers for the actual parcel instead of quoting a rule of thumb.
Line on the bill | Williamson side | Travis side |
|---|---|---|
City of Round Rock | 0.423 | 0.423 |
Round Rock ISD | 0.9484 | 0.9484 |
Austin Community College | 0.103643 | 0.103643 |
County general | 0.381218 | 0.38621 |
Williamson County road (FM/RD) | 0.040329 | not on Travis bills |
Central Health | not on Williamson bills | 0.132863 |
2026 adopted rates per $100 from the two county tax offices. The Williamson table lists the road rate as a separate county levy; your statement shows whether it applies to your parcel.
What stays the same
The City of Round Rock's 2026 rate is 0.423 in both tables. Round Rock ISD is 0.9484 in both, and ACC's 0.103643 shows in both. So the city, school and college lines do not change at the county line. Only the county lines, the appraisal district and the county exemptions do.
Round Rock buyer guide
Roads, MUDs, school district lookups and the rest of the checklist are in the Round Rock, TX home buyer guide.
Cedar Park, Leander and Pflugerville have the same split
Travis County's 2026 table lists the City of Cedar Park, the City of Leander and the City of Pflugerville next to Round Rock, along with Leander ISD and Pflugerville ISD. Pflugerville's city rate is 0.5436 in both counties' tables, Cedar Park's is 0.37793 and Leander's is 0.417282. Same rule: the city and school lines hold, the county lines swap.
If you are deciding between towns, the Pflugerville vs Round Rock comparison and the Cedar Park buyer guide cover the rest of the trade.
How to check the county for a house
Search the address on WCAD and TCAD. The district that has the parcel tells you the county. The most recent tax statement lists every taxing unit on the property. I pull both for every house before we write an offer, so the payment estimate uses the right county lines from the start.
FAQ
Questions people ask
Is Round Rock in Williamson or Travis County?
Both. The City of Round Rock appears in the 2026 tax rate tables for Williamson County and Travis County, so it taxes property in each. Check the parcel on WCAD or TCAD to see which county a house is in.
Do Travis County Round Rock homes pay a different tax rate?
The city, Round Rock ISD and ACC rates are the same. The county lines differ: Travis County 0.38621 plus Central Health 0.132863, instead of Williamson County's 0.381218 plus 0.040329.
Where do I file the homestead exemption for a Travis County home in Round Rock?
With the Travis Central Appraisal District. TCAD accepts applications online, by mail or at 850 East Anderson Lane.
Does Travis County give a homestead exemption?
Yes. TCAD's 2026 listing shows a 20 percent homestead exemption for Travis County with a $5,000 minimum, and $145,269 for owners 65 or older or disabled.
Keep reading
Sources
- Travis County Tax Office, 2026 Truth in Taxation rate table
- Williamson County Tax Assessor-Collector, 2026 Tax Rate Information (Truth in Taxation Summary)
- Travis Central Appraisal District, 2026 Exemption Listing (July 19, 2026)
- Travis Central Appraisal District, Homestead Exemptions
- Williamson Central Appraisal District
- Texas Comptroller, Property Tax Exemptions
Every figure above was checked on the official page on October 15, 2026. Rates and rules change; the linked source is the final word. Reviewed by Ken Jackson, REALTOR, Spyglass Realty, TREC #754679.
Questions about this? Talk to Ken.
Call (737) 307-4848 or send Ken a message.
