The local tax guide · California
San Diego County
property tax, explained.
A San Diego property tax bill can include percentage-based tax and fixed-charge assessments. A buyer may also receive a separate supplemental bill, so the annual bill should not be treated as the complete cost of a purchase-year reassessment.
Sources reviewed
Follow the dollars
Keep percentage tax and fixed charges on separate lines
At a hypothetical taxable assessment of $700,000, the 1% general levy is $7,000. If the parcel instead had an illustrative total rate of 1.15% and $600 in fixed charges, the annual calculation would be $700,000 × 1.15% + $600 = $8,650. The 1.15% and $600 are teaching inputs, not verified rates or charges for a San Diego address.
Annual percentage-based tax plus entered fixed charges. Excludes supplemental bills, penalties, interest and omitted adjustments. Default: 1% general levy only, with no fixed charges.
Use the inputs from your record
San Diego County tax calculator
Annual illustration
$7,000.00
Using the starting example inputs.
- Taxable base
- $700,000.00
- Value-based tax
- $7,000.00
Annual percentage-based tax plus entered fixed charges. Excludes supplemental bills, penalties, interest and omitted adjustments. Default: 1% general levy only, with no fixed charges.
Match the value and rate year. Calculations happen in your browser; this form does not submit your inputs.
Read the assessed value, rate and fixed-charge sections
Use the Treasurer-Tax Collector’s secured-tax page to access the official bill resources. Match the parcel identifier and fiscal year before copying figures.
The county’s annotated bill guide (PDF) identifies fixed-charge special assessments and directs questions about them to the agency contact shown on the bill. That guide is historical; use it to understand the layout, not as a current rate or deadline source. Enter fixed dollar charges separately from the percentage rate.
A supplemental bill is separate from the annual bill
The county’s supplemental-tax explanation describes reassessment after an ownership change or completed construction. The supplemental calculation concerns the change in value and the applicable portion of the fiscal year.
For example, a change from $500,000 to $700,000 creates a $200,000 difference. That difference is not the same as the $700,000 annual taxable base. Timing and the notice determine the supplemental amount; this annual calculator does not attempt to estimate it. Keep any negative supplemental notice or refund separate too—it does not cancel other bills.
Check whether the homeowners’ exemption is already present
The San Diego Assessor’s exemption page explains how to check the upper-right section of the bill for “EXEMPTION: HOMEOWNERS” and the $7,000 assessed-value reduction. This is a reduction in value, not a $7,000 tax credit.
At the 1% general levy, a $7,000 value reduction represents $70 of tax. If your taxable value already includes it, do not deduct another $7,000 in the calculator. Use the linked claim instructions to establish eligibility or notify the Assessor about an ownership or occupancy change.
An assessment review does not replace a formal appeal
The Assessor’s appeals page explains review by the independent Assessment Appeals Board. Check the instructions for your notice type, because an annual assessment and a supplemental notice are not interchangeable.
Gather the parcel record, valuation notice and supporting evidence before filing. For an unexplained fixed charge, start with the agency identified on the bill; for a payment balance, use the Tax Collector. Keep payment deadlines in view while a valuation dispute is being considered.
Sources and review scope
Property Tax Almanac checked these official sources on September 26, 2026. Illustrative inputs are labeled; this review does not establish every parcel’s current rate or individual eligibility.
- San Diego secured taxes — Annual bill and official payment resources.
- Annotated bill guide (PDF) — Historical explanation of fixed-charge assessments; no current rate assumed.
- Supplemental taxes — Separate bills, changed value and fiscal-year proration.
- Homeowners’ exemption — $7,000 assessed-value reduction and how to check the bill.
- Assessment appeals — Local formal appeal process.
The calculator divides the taxable base by 100, multiplies by the entered rate and rounds to cents, then adds the separate dollar charges entered. It is a bill-checking tool, not an official tax determination. Other site tools may use different benchmark assumptions.
Report a correction with the page, tax year and official source. See our data methodology or return to California counties.