78681 Property Tax Rate

Property owners in ZIP code 78681 (Round Rock, Texas) pay a median of $7,959/year in property taxes on homes valued at $460,000. This translates to an effective tax rate of 1.73%, which is 28% above the Texas state average of 1.35%.

The monthly property tax burden for a median-valued home in 78681 is approximately $663, which factors into escrow payments on mortgages. This ZIP code is located within Williamson County. This is $4,828 more than the Texas average of $3,131/year.

Compared to similar ZIP codes in Texas, 78681 has lower property taxes. ZIP codes with similar effective rates include 77057 (1.73%) and 75252 (1.73%).

In Round Rock, property taxes represent approximately 5.8% of the median household income of $136,215, providing context for the relative tax burden on homeowners in this area.

Texas caps annual appraisal increases at 10% for homestead properties, but this cap only applies once you file — submit your Homestead Exemption application to the Williamson County Appraisal District by April 30 of the year following purchase. The exemption removes a portion of assessed value from school and county taxes, typically saving $800–$1,500/year even on a median $370,400 home in this fast-growing county. File your exemption with the Williamson County Assessor immediately after closing and request confirmation of your homestead cap status, as Williamson County appraisals tend to increase rapidly.