State-wide: Texas sales tax exemption on rainwater harvesting supplies, and property tax exemptions on part or all of the assessed value of the approved water conservation properties.
City of Austin: Up to $5,000 in rebates per qualifying system. Checklist and application can be found here.
City of Georgetown: Annual rebates on rainwater barrels
Kerr County: Rebates for purchasing rainwater catchment systems
City of Round Rock: Annual rebates for non-potable rainwater systems for irrigation and domestic use
City of San Antonio: Up to $2,000 in rebates for nonpotable rainwater systems over 500 gallons
City of San Marcos: Up to $5,000 in rebates for rainwater system components and installation costs
City of Sunset Valley: Up to $3,500 in rebates for rainwater systems over 900 gallons
LCRA service customers: Rebates for rainwater systems over 100 gallons
Post Oak Savannah Groundwater Conservation District: Up to $3,000 in rebates for rainwater systems after completing a Rainwater Harvesting 101 course