1. The Disputed Charge Determines the Review Process
A higher bill can reflect a valuation change, a missing exemption, a separate charge, or an uncredited payment. Identify the disputed item before choosing a correction request or appeal. California law governs the assessment, while county offices handle valuation, billing, and collection.
Assessed Values and Exemption Records
The Los Angeles County Assessor sets taxable value. Check the property’s recorded size, use, and condition against plans, permits, and dated photographs.
Annual decline-in-value claims generally concern market value on January 1. Reassessments after a purchase or completed construction use the relevant event date. Choose comparable sales that reflect value on that date. For rentals, leases, vacancy data, and expenses help test valuation assumptions against market conditions.
For a missing exemption, review the application, filing date, and ownership or occupancy requirements with the Assessor. The Assessment Appeals Board (AAB) generally does not decide exemption claims.
Tax Rates, Separate Charges, and Payment Entries
The general 1% levy applies to net taxable value. Voter-approved debt and direct assessments can add charges. Direct assessments, such as sewer charges, are not based on the Assessor’s valuation, so a lower assessed value will not necessarily reduce them.
| Disputed Item | Office or Procedure | Records to Compare |
|---|---|---|
| Assessed value | Assessor review and, when appropriate, an AAB application | Assessment notice, property records, comparable sales |
| Missing exemption | Assessor’s exemption process | Application and eligibility records |
| Tax calculation | Auditor-Controller | Taxable value, rate, and bill calculation |
| Direct assessment | Agency identified beside the charge | Charge description and agency records |
| Missing or duplicate payment | Treasurer and Tax Collector | Receipts, bank records, and payment history |
Assessed value
- Office or ProcedureAssessor review and, when appropriate, an AAB application
- Records to CompareAssessment notice, property records, comparable sales
Missing exemption
- Office or ProcedureAssessor’s exemption process
- Records to CompareApplication and eligibility records
Tax calculation
- Office or ProcedureAuditor-Controller
- Records to CompareTaxable value, rate, and bill calculation
Direct assessment
- Office or ProcedureAgency identified beside the charge
- Records to CompareCharge description and agency records
Missing or duplicate payment
- Office or ProcedureTreasurer and Tax Collector
- Records to CompareReceipts, bank records, and payment history
The AAB does not change tax rates or resolve ordinary payment disputes. Disputes over IRS assessments or collection notices follow separate federal tax procedures.
2. Closing Adjustments Do Not Settle Every Property Tax Bill
The closing statement and county records answer different questions: who agreed to bear the cost, and whether the tax was paid. Comparing them can explain why a balance remains after the purchase.
Closing Credits and Actual County Payments
Tax prorations usually divide costs between buyer and seller based on ownership dates. If the current bill is unavailable, escrow may adjust the closing balance using an estimate without paying the county. Look for a separate payment entry naming the Treasurer and Tax Collector.
Match the closing statement, receipts, and county payment history using the Assessor’s Identification Number (AIN), tax year, and bill sequence. If the records differ, request the payment date, recipient, amount, and transaction reference.
An attorney can review whether the disagreement concerns an uncredited payment or a party’s obligations under the closing agreement. A seller’s promise to bear a tax cost does not itself clear the county balance.
Business owners should distinguish closing adjustments from actual tax payments in their records. If the IRS questions an expense on a return, a business tax lawyer can trace the amount through the ledger to supporting documents. Correcting a county payment record does not decide the federal treatment of an expense.
Annual Bills, Supplemental Bills, and Lender Payments
A qualifying ownership change or completed construction can trigger a supplemental assessment for the change in taxable value. A supplemental bill is separate from the annual bill. Some events produce two supplemental bills for different fiscal years. Compare the event date and periods covered before treating them as duplicates.
The annual bill may still name the prior owner while ownership records update. Request a copy if it did not reach you. Not receiving a bill does not excuse late payment.
A lender’s impound account holds money for taxes and other expenses. Lenders generally do not pay supplemental bills. Check the lender’s payment date and bill reference, then confirm who will pay any unpaid supplemental bill.
3. Appeal Deadlines and Payment Dates Run Separately
An informal discussion with the Assessor does not replace a timely AAB application. A payment correction request also does not challenge the assessed value. If both issues remain open, track the appeal deadline and the payment due date separately.
Los Angeles County Applications and Supporting Records
The 2026 filing period for regular assessments runs from July 2 through November 30. Applicants can submit the county’s AAB-100 application online, by mail, or in person. Keep the filed application and submission confirmation.
For supplemental and escape assessments, Los Angeles County uses the tax bill to start the 60-day filing period. Count from the later of the bill’s printed mailing date and postmark. Keep the assessment notice and envelope as well.
An attorney reviewing property tax assessment disputes can identify the appeal grounds and evidence needed to support them. The application should identify the disputed assessment, tax year, and requested value. Documents sent to the Assessor during an informal review do not replace evidence presented at the hearing.
Payments and Potential Refund Claims
An appeal does not suspend payment. Annual secured taxes are due in two installments, November 1 and February 1. Pay by December 10 and April 10, respectively, to avoid delinquency. Weekend and holiday adjustments may move those deadlines to the next business day. Supplemental bills have their own payment dates.
The AAB may leave the assessment unchanged, lower it, or increase it. A refund lawsuit in Los Angeles County Superior Court requires review of payment, required administrative proceedings, refund claims, and the court filing deadline. Whether the appeal application also served as a refund claim can affect the next step.
4. A Case Review Defines the Work and Costs
A case review should identify the disputed entry, the evidence still needed, and the procedure that can address it.
Documents and Representation Costs
Bring the bill and envelope, closing statement, payment receipts, assessment or exemption records, and correspondence with escrow, the lender, or county offices. Flag any approaching deadline and any correction request already pending.
Ask whether the proposed fee covers a document review, correction request, AAB application, hearing, or later refund action. Confirm whether appraisal work costs extra.
09 Nov, 2026
