Napa Sales Tax: Rates by City, Exemptions, and Wine Fees

The Napa sales tax rate is 8.75% inside the City of Napa, effective April 1, 2025, when the voter-approved Measure G increase took effect.¹ That rate applies to most purchases of tangible goods within city limits. Other parts of Napa County are lower, and several categories of goods are exempt entirely.

Rates by City in Napa County

The rate you pay depends on where the sale happens, not where you live. Cross a city line and the percentage can shift by a full point. Current combined rates in Napa County:²

City of Napa — 8.75%
St. Helena — 8.25%
American Canyon — 7.75%
Calistoga — 7.75%
Yountville — 7.75%
Unincorporated Napa County — 7.75%

The City of Napa carries the highest rate in the county. On a $2,000 purchase, that works out to $175 in tax inside the city compared to $155 in Yountville or American Canyon. For a big-ticket item, it’s worth knowing which side of a city boundary you’re standing on.

Every rate here starts from California’s statewide 7.25% base. The countywide half-cent transportation tax (Measure T, renewed as Measure U) brings most of the county to 7.75%.³ City-level add-ons push Napa and St. Helena above that.

Why the City of Napa Is a Full Point Higher

Napa voters approved Measure G in November 2024, adding one cent to the city’s sales tax rate. Collection began April 1, 2025.⁴ The revenue funds road maintenance, sidewalk repairs, park improvements, and public safety within city limits.⁵ The measure applies only inside Napa city limits. Purchases in unincorporated county areas and in other cities are unaffected.

What Gets Taxed and What Doesn’t

California sales tax applies to tangible personal property, meaning physical goods you can touch. Most things you buy at a store are taxable. A few categories that matter to everyday shoppers are not.

Groceries

Most food you buy at a grocery store and take home to eat is exempt.⁶ That covers produce, meat, dairy, canned goods, and bread. The exemption disappears when food is sold hot or prepared for immediate consumption. A rotisserie chicken from the deli counter is taxable; a raw chicken from the meat department is not. Carbonated beverages, candy, and hot prepared meals from restaurants are taxed at the full rate.

Prescription Medicine

Prescription medication is exempt, along with certain medical devices like prosthetics and orthotic equipment.⁷ Over-the-counter drugs that don’t require a prescription are taxable. The line is straightforward: if a doctor or pharmacist had to authorize it, no tax.

Digital Products

California only taxes tangible personal property, so products delivered electronically are generally not subject to sales tax. Software downloads, ebooks, streaming music, and digital movies fall outside the tax. The same software becomes taxable if it ships on a physical disc or USB drive. Cloud-based subscriptions where you never download a copy are also not taxed.

Wine and Tasting Fees

Buy a bottle at a winery’s retail shop and you pay the full local rate: 8.75% in the City of Napa, 7.75% in most of the rest of the county. Tasting fees work the same way. A paid tasting is treated as a retail sale of wine, so sales tax applies.⁸

Food served alongside a tasting (cheese, charcuterie, crackers) is also taxable when sold as part of the tasting experience. Wineries can either add the tax as a separate line on your receipt or build it into the posted price, as long as they post a sign telling you so.⁸ Complimentary tastings shift the obligation to the winery itself; the winery owes use tax on the cost of the wine given away, rather than collecting tax from you.

California also imposes an excise tax on wine of $0.20 per gallon, but that’s paid upstream by the producer or importer and doesn’t appear at the register.⁸

Vehicle Purchases

A car or truck follows the same tax structure, with one twist: the rate is based on where you register the vehicle, not where you buy it. Register at a Napa city address and you pay 8.75%.⁹ On a $40,000 vehicle, that’s $3,500 in tax. Buying from a private seller doesn’t help. You still owe use tax at the same rate, collected by the DMV when you transfer title. California also does not reduce the taxable amount for a trade-in, so the tax is calculated on the full purchase price.

Online and Out-of-State Purchases

When you buy something from a retailer that doesn’t charge California sales tax (an out-of-state store, a smaller online seller, a private party), you owe use tax at your local rate. For City of Napa residents, that’s 8.75% on the purchase price.² Most large online retailers now collect California tax automatically, but smaller sellers and private transactions still slip through.

You have two ways to pay. The simpler one is to report it on your California income tax return (Form 540 or 540 2EZ), which has a dedicated line for use tax owed during the year.¹⁰ You can also pay the CDTFA directly through its online portal after a purchase. Either way, the tax is due by April 15 of the year following the purchase. Ignoring it carries a 10% penalty on the unpaid amount, plus interest that accrues monthly from the original due date.¹¹

1
City of Napa. City Announces Implementation of Measure G Sales and Use Tax
2
California Department of Tax and Fee Administration. California City and County Sales and Use Tax Rates
3
Napa Valley Transportation Authority. About Measure U
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City of Napa. Measure G – Investing in Our Community
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City of Napa. City of Napa Voters Approve Measure G
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California Department of Tax and Fee Administration. Sales and Use Tax Regulations – Article 8
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California Department of Tax and Fee Administration. What Is Taxable
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California Department of Tax and Fee Administration. Tax Guide for Winemakers Industry Topics
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California Department of Tax and Fee Administration. Tax Guide for Purchasers of Vehicles
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California Department of Tax and Fee Administration. California Use Tax For Personal Use
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Justia Law. California Revenue and Taxation Code 6591-6597 – Interest and Penalties