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Impose a sales tax for 14 years to fund transit and specified transportation improvements across five Bay Area counties. The rate would be 0.5% in San Mateo, Alameda, Contra Costa and Santa Clara counties, and 1% in San Francisco. The estimated $980 million in annual revenue is for the entire district, not San Mateo alone. The measure includes financial reviews and independent oversight.
Official source: https://smcacre.gov/elections/november-3-2026-statewide-general-election
Approval requirement: Majority (county listing).
To prevent major service cuts to BART and other transit, avoid increased traffic, and reduce pollution by: Preserving BART, Caltrain, VTA, SamTrans, AC Transit, Muni, other transit for everyone, including workers, students, seniors, persons with disabilities; Supporting transit safety, cleanliness, affordability, reliability; Repairing targeted roads/potholes; Requiring financial transparency, oversight, accountability; shall the measure enacting a 0.5% (Alameda, Contra Costa, San Mateo, Santa Clara counties), and 1% (San Francisco) sales tax for 14 years generating approximately $980,000,000 annually, be adopted?
Official ballot wording (PDF page 8). Wording transcribed from the official filing; line breaks and spacing normalized.
CalBallot explanation: AI-assisted, checked against the cited official documents. It is separate from the official ballot question and from campaign arguments.
Official ballot wording (PDF page 8); District counsel’s impartial analysis (PDF pages 1, 2)
Content reviewed 2026-10-08. Source files checked 2026-10-08. Links open the county’s current files, which may change after review.
18 of 26 recorded Sales Tax measures in San Mateo passed between 2004 and 2024.
Same county and broad measure type. These measures may have different purposes and voting rules. Historical outcomes are not a forecast.
Recent records from this comparison:
SAN MATEO Measure AA
SAN MATEO Measure R
SAN MATEO Measure U
SAN MATEO Measure Y
To preserve Caltrain service and support regional economic recovery, prevent traffic congestion, make Caltrain more affordable and accessible, reduce…
CalBallot has not yet linked campaign-finance filings to this local measure. No contribution or spending total is reported here.
San Mateo County campaign-finance resources
Use the November 2026 election, jurisdiction and measure name to search. City or regional committees may file with a different office; the county resource is a starting point, not a complete measure-specific filing list.
Documents are hosted by the county. Capture dates describe when CalBallot retrieved the files; the county may update its files.