How to Calculate Property Tax in California

To estimate a California property tax bill, start with the taxable assessed value shown by the county, not today’s asking price. Apply the one-percent general levy, then add the voter-approved debt rate and direct assessments shown for that parcel. Use the county’s value after approved exemptions, so an exemption is not counted twice. The county bill, not an online average rate, is the amount to pay.

Step 1: Find the taxable value and parcel

The county assessor enrolls the assessed value. A change in ownership or new construction can establish a new base value. The factored base value generally rises by no more than two percent a year, but a temporary decline-in-value assessment can later rise by more than two percent as market value recovers, up to the factored base value. BOE Publication 29 and the BOE decline-in-value FAQ explain the distinction. Use the current assessment roll or bill for the parcel you own.

Step 2: Calculate the one-percent base levy

Multiply taxable value by 0.01. On a taxable value of $500,000, the one-percent levy is $5,000. On $1,000,000, it is $10,000. These are base-levy illustrations, not complete bills or estimates of a purchase’s reassessed value.

Step 3: Add the parcel’s other bill lines

The rate can include voter-approved indebtedness. A secured bill may also include direct assessments or parcel charges that are not simply one percent of value. Read the rate area and every line on the county statement. BOE Publication 29 describes the levy; the Los Angeles County tax collector shows how general levy, voted indebtedness and direct assessments appear on a county bill. A statewide “1.1% average” cannot replace the parcel’s actual lines.

Step 4: Check relief without assuming it applies

The homeowners’ exemption reduces assessed value by up to $7,000 for an eligible principal residence, not an investment rental. Other programs have their own qualifications. Proposition 19 can permit a qualified base-year transfer or limited family-home/farm exclusion; it is not a general parent-child exclusion for every rental. A qualifying active solar system can be excluded from new-construction reassessment, which is different from subtracting an exemption from an existing bill. Confirm eligibility with the county assessor before changing your estimate. See the BOE homeowners’ exemption, BOE Proposition 19 guidance and BOE solar exclusion.

Step 5: Compare with the bill and calendar

The assessor sets values; the county treasurer and tax collector bills and collects. In Los Angeles County, the first secured installment is due November 1 and delinquent after December 10; the second is due February 1 and delinquent after April 10. Check the dates and payment instructions on your own county bill. A pending assessment review or appeal does not pause the payment obligation. See the Los Angeles County tax collector and BOE appeals FAQ.

A compact worksheet

• Taxable assessed value after approved exemptions × 1% = general levy.
• Add the voter-approved debt levy shown for the tax rate area.
• Add direct assessments or parcel charges exactly as billed.
• Use any corrected values or charges the county has issued. Do not subtract an exempt value from tax dollars or count an exemption twice.
• Compare the result with the current bill and keep the county payment receipt.

If the taxable value seems wrong, contact the assessor. For a direct charge, contact the agency named on that bill line. For a payment posting, contact the tax collector. For the separate question of relief and appeals, see our guide to reading tax rate, relief and appeal options.