What is Measure K?
Measure K is a half-cent, countywide sales tax. The tax adds a dime to a taxable purchase of $20. Most groceries are exempt from sales tax, as are prescription drugs and certain medical devices.
The Board of Supervisors placed the original sales tax, Measure A, on the November 2012 ballot with the goal of providing local funds for local needs. It passed with more than 65 percent of the vote. To build on that progress, the Board placed a 20-year extension on the November 2016 ballot. Designated Measure K in the randomized alphabet drawing, it was approved with 70.37 percent of the vote and runs until 2043.
Measure K by the numbers
- 70.37% of voters approved Measure K in November 2016
- 10 Oversight Committee members, two from each supervisorial district
- 12 annual reports published since FY 2013-14
Who decides how the funds are spent?
The San Mateo County Board of Supervisors approves all Measure K funding. The Measure K Oversight Committee reviews an annual audit of the sales and use tax revenue, recommends metrics to assess impact and prepares an annual report. The Committee does not make funding recommendations.
Annual reports
Earlier annual reports, back to FY 2013-14, are on the Data and Reports page.
Page last updated November 6, 2026