What is the sales tax rate in San Marcos, California?

The combined sales tax rate in San Marcos, California is 10.100% as of 2026. This includes the California state rate of 7.300% plus local jurisdiction taxes.

How is the San Marcos sales tax calculated?

Multiply your purchase amount by 10.100% (or 0.01010) to get the tax owed. For example, a $100 purchase incurs $10.10 in sales tax.

What is the California state sales tax rate?

The base California state sales tax rate is 7.300%. Local jurisdictions may add additional taxes on top of this rate.

Does San Marcos have a county sales tax?

San Marcos imposes an additional county-level sales tax of 0.300% on top of the state rate.

When was the San Marcos sales tax rate last updated?

The San Marcos sales tax rate was last verified on March 27, 2026. We cross-reference all rates against the official State Department of Revenue data.

Live Data: April 2026

San Marcos, CA Sales Tax Rate 2026

The combined sales tax rate in San Marcos, California is 10.100%.

Combined Rate 10.100%

State7.300% County0.300% City1.000%

San Marcos Sales Tax Breakdown

Jurisdiction	Rate
California State Sales Tax	7.300%
County Sales Tax	0.300%
City / Municipal Tax	1.000%
Special District Tax	1.500%
Total Combined Rate	10.100%

Which County Is San Marcos In?

San Marcos falls within San Diego, California. San Diego imposes a 0.300% county-level sales tax in addition to the California state base rate.

San Marcos ZIP Codes

The following ZIP codes are mapped to San Marcos for sales tax purposes. All listed codes apply the 10.100% combined rate.

92069 92078 92096

Nearby Tax Rates

Vista 5.3 mi

10.100%

Combined Rate

View Local Rates

Business Nexus in California

Economic Nexus Threshold

Selling into California from out of state? Once you exceed $500,000 in annual sales or 0 transactions, you must register and collect California sales tax.

FAQ: San Marcos Sales Tax

The combined sales tax rate in San Marcos, California is 10.100% as of 2026.

Multiply your purchase price by 10.100% to find the tax owed. A $500 purchase would include $50.50 in sales tax.

Groceries are generally taxable in California. Check the official Department of Revenue for specific exemptions.

Vehicle purchases in San Marcos are subject to the 10.100% combined rate, though some states apply different rules for vehicle sales. Verify with the California Department of Revenue or DMV.

Register for a sales tax permit through the official California Department of Revenue website. Registration is typically free and required before collecting any sales tax.

Sales Tax Calculator

Using 10.100% rate for San Marcos, CA

Purchase Amount ($)

Tax Amount $0.00

Total with Tax $100.00

Rate applied: 10.100% combined

Official Tax Authority

California Department of Tax and Fee Administration

Filing Deadline: Returns due the last day of the month following the reporting period. File via CDTFA Online Services.

Visit Official Portal (800) 400-7115