Sales Tax in San Ramon, CA: 9.75% Rate and Measure N

The sales tax in San Ramon, CA is 9.75%, and it applies to most purchases of physical goods within city limits.1California Department of Tax and Fee Administration. California City and County Sales and Use Tax Rates The rate combines California’s statewide base with several county and city add-ons, including a 1% city tax that voters approved in November 2024. Groceries, prescription drugs, and certain medical devices are exempt, so what you pay at the register depends on what you’re buying as much as where.

How the 9.75% Rate Breaks Down

California sets a statewide base sales tax rate of 7.25% that every city and county collects. That base funds state programs, local government operations, and county transportation.2California State Association of Counties. Sales and Use Tax Issue Brief San Ramon adds district taxes on top of that floor to reach 9.75%.

The components: 6% state, 0.25% county, 1% city, 1% local transportation, and 1.5% county district. The state and county portions are uniform across California. The remaining 2.5% comes from voter-approved district measures at the city and county level, which is why San Ramon’s rate differs from cities just a few miles away.

Measure N and the City’s 1% Share

The 1% city portion comes from Measure N, which the City Council placed on the November 5, 2024 ballot and voters approved.3City of San Ramon. City Attorney’s Impartial Analysis of Measure N It’s a general transactions and use tax, with all proceeds going into the city’s General Fund, and it expires in 2035. Because it’s a general tax rather than a special tax, the city isn’t locked into spending the revenue on any one program. The City Attorney’s impartial analysis lists possible uses including police services, traffic enforcement, road maintenance, library and recreation services, park upkeep, and youth and senior programs.

What’s Taxed and What Isn’t

The 9.75% rate applies to tangible personal property: anything physical you can see, touch, or weigh.4California Department of Tax and Fee Administration. Revenue and Taxation Code Section 6016 – Tangible Personal Property Clothing, electronics, furniture, sporting goods, and household supplies are all taxed. Services that don’t produce a physical item, like accounting, tutoring, or a haircut, generally aren’t. If a service does result in a new tangible item, such as a custom-built cabinet, the transaction becomes taxable.

Several categories of physical goods are exempt:

  • Groceries. Food intended for home consumption, including produce, meat, dairy, and bread, isn’t taxed. The exemption disappears once food is heated or served as a prepared meal.5California Department of Tax and Fee Administration. Tax Guide for Grocery Stores
  • Prescription medicines. Drugs prescribed by a doctor are exempt under Revenue and Taxation Code Section 6369. Over-the-counter medications like aspirin and cough syrup are taxed normally.
  • Medical devices. Prosthetics, orthotic braces, permanently implanted devices, and artificial limbs are exempt when prescribed or furnished by a medical professional.

Restaurant and Prepared Food

Hot prepared food is always taxable, whether you eat it in or take it home.6California Department of Tax and Fee Administration. Sales and Use Tax Regulations – Article 8 A rotisserie chicken from the deli counter, a slice of pizza, or a drive-through burrito all carry the full 9.75%. Cold food sold to go from a grocery store, like a premade sandwich or a bag of salad, is typically exempt. The general rule: if it’s heated for you, it’s taxed.

Use Tax on Online and Out-of-State Purchases

When you buy something online from a retailer that doesn’t charge California sales tax, you owe use tax at the same 9.75% rate. Use tax keeps out-of-state purchases from having a built-in price advantage over buying locally.7California Department of Tax and Fee Administration. California Use Tax

Most large online retailers already collect California sales tax. Since 2019, any retailer with more than $500,000 in annual sales into California must register with the CDTFA and collect the tax, whether or not it has any physical presence in the state.8California Department of Tax and Fee Administration. Use Tax Collection Requirements Based on Sales into California Due to the Wayfair Decision Where use tax still catches people is with smaller out-of-state sellers, purchases from private parties in other states, or items bought while traveling.

If you don’t hold a seller’s permit, you can report and pay use tax on your California income tax return. Individuals who make more than $10,000 in untaxed purchases per calendar year (excluding vehicles, vessels, and aircraft) must register directly with the CDTFA as a “qualified purchaser” and file an annual use tax return by April 15.7California Department of Tax and Fee Administration. California Use Tax

How San Ramon Compares to Nearby Cities

Rates around the Tri-Valley and greater Contra Costa area vary based on which local ballot measures each city’s voters have approved.

Danville’s rate is lower because, as an unincorporated community in Contra Costa County, it hasn’t adopted certain city-level district taxes. Dublin and Pleasanton sit in Alameda County, where a heavier stack of district taxes pushes rates above 10%. For big-ticket purchases like appliances, furniture, or electronics, a short drive can mean real savings. On a $2,000 purchase, the difference between Danville’s 8.75% and Dublin’s 10.25% is $30.

Rates can also vary within a single city depending on special taxing districts. The CDTFA’s online lookup tool at maps.cdtfa.ca.gov gives the exact rate for any street address.

Requirements for Businesses Collecting Sales Tax

Any business selling physical goods in San Ramon needs a California seller’s permit before its first sale. The permit itself is free, though the CDTFA may require a security deposit depending on your estimated tax liability.9California Tax Service Center. Get a Sellers Permit Temporary sellers, such as someone running a booth at a weekend craft fair, need a temporary permit if the selling period is 30 days or less at one location.10California Department of Tax and Fee Administration. Your California Sellers Permit The CDTFA assigns your filing frequency, whether monthly, quarterly, or yearly, based on expected sales volume.11California Department of Tax and Fee Administration. Doing Business in California – Tax and Fee Rates and Filing Frequencies You collect the full 9.75% at the point of sale and remit it on your assigned schedule.

Out-of-state businesses selling more than $500,000 into California in the current or prior calendar year also have to register with the CDTFA and collect use tax on those transactions.8California Department of Tax and Fee Administration. Use Tax Collection Requirements Based on Sales into California Due to the Wayfair Decision

Penalties and Interest for Late Payment

Missing a filing deadline or underpaying triggers a 10% penalty on the amount owed. The penalty applies whether you filed late, paid late, or both, and it doesn’t stack beyond 10% for a single reporting period.12California Department of Tax and Fee Administration. Interest, Penalties, and Collection Cost Recovery Fee Interest runs on top of the penalty. For 2026, the CDTFA charges 10% annual interest on unpaid tax, and the rate is recalculated every six months based on the federal rate plus 3%.13California Department of Tax and Fee Administration. Interest Rates On a $5,000 tax bill that’s three months overdue, you’d owe roughly $500 in penalties plus about $125 in interest.