Los Angeles County Property Tax Search: Look Up Bills, Records & Parcel Details
Los Angeles County property tax search is easier when you know which official tool matches your question. A taxpayer may need the tax bill amount, a duplicate bill, an Assessor’s Identification Number, parcel details, payment history, assessment information, or recorded deed and lien records. These are related tasks, but they are not all handled by one office.
This guide explains the search routes in plain English, so you can understand what each result means before opening an official LA County portal. Use the county website only when you are ready to look up the account, view the bill, pay, request records, update mailing address, file an exemption, or contact the correct office.
Quick Answer
For a Los Angeles County property tax search, start with the AIN if you have it. Use the Treasurer and Tax Collector tools to view secured tax amounts, payment history, duplicate bills, and property tax payment status. Use the Assessor portal to search parcel and assessed-value details. Use the Registrar-Recorder/County Clerk route for recorded real estate documents such as deeds, liens, and older property records.
- Find or confirm the 10-digit Assessor’s Identification Number, also called the AIN.
- Use the secured property tax lookup to check the current or delinquent amount due.
- Use duplicate bill tools if the annual secured tax bill is missing.
- Use the Assessor portal when you need property characteristics, parcel details, or assessed value.
- Use Recorder real estate record instructions when you need deed, lien, or recorded document information.
- Save any bill, confirmation, payment history, or official record result before taking action.
Which Los Angeles County Property Tax Search Tool Should You Use?
LA County property tax information is split between several offices. The Treasurer and Tax Collector handles tax bills, balances, payments, payment history, duplicate bills, and delinquent tax tools. The Assessor handles assessed values, property characteristics, AIN lookup, exemptions, mailing address changes, and reassessment issues. The Recorder handles real estate records such as recorded property documents.
| Your Search Need | Best Official Office | What You Can Find | Start Here |
|---|---|---|---|
| Property tax bill amount | Treasurer and Tax Collector | Current year secured taxes, delinquent secured taxes, amount due, and payment route. | Property Tax Balance Due |
| Duplicate property tax bill | Treasurer and Tax Collector | Replacement bill for a missing or lost secured property tax bill. | Request Duplicate Bill |
| Parcel details or AIN lookup | Assessor | Property address, AIN, assessed value, property characteristics, ownership-related public assessment data. | Assessor Portal |
| Payment history | Treasurer and Tax Collector | Payment history for property tax account review and proof-checking. | Payment History |
| Deed, lien or recorded document | Registrar-Recorder/County Clerk | Recorded real estate records maintained by the county since 1851. | Real Estate Records |
| Assessment appeal | Assessment Appeals Board / Assessor | Appeal process, deadlines, value-dispute route, and assessment review information. | Assessment Appeals |
What Is an LA County AIN?
The Assessor’s Identification Number, or AIN, is the key number for many Los Angeles County property tax searches. It is a 10-digit number assigned to real property for tax purposes. LA County describes the AIN as map book, page, and parcel, often shown in a format similar to 1234-567-890.
The AIN is commonly shown as a four-digit map book number, a three-digit page number, and a three-digit parcel number.
Look on the secured property tax bill, prior tax bill, escrow paperwork, Assessor records, or the Assessor portal.
You normally need the AIN to view secured property tax amounts, pay online, request a duplicate bill, or check payment history.
Do not search by only owner name when you are ready to pay. Confirm the AIN and property address first.
- Open the LA County Assessor portal.
- Use property address search if you do not know the AIN.
- Confirm the address, parcel and property details before copying the number.
- Use the AIN in Tax Collector tools for bill, balance, and payment tasks.
How to Look Up Los Angeles County Property Tax Bills
The Treasurer and Tax Collector is the main office for secured property tax bill amounts, duplicate bills, payment options, penalties, payment history and tax payment status. If you need the amount due, start with the secured tax balance tool and use your AIN.
- Open the Property Tax Balance Due page.
- Enter the AIN exactly as shown on the bill or Assessor portal.
- Review the tax year, installment, amount due, and payment status.
- Check whether the information is current year, delinquent, or unavailable during a limited system period.
- Save or print the result before paying or contacting a lender.
When online secured tax information is available
LA County explains that current year secured tax information is available online between October 1 and June 30. Delinquent secured tax information is available all year except during July. This matters if you search during a system transition period and do not see the expected current-year bill.
| Bill Search Item | What It Means | What To Do |
|---|---|---|
| Annual secured bill | The main yearly bill for real property, mailed in October and payable in two installments. | Use the bill or AIN to check balance and payment status. |
| Substitute secured bill | A replacement bill used when the original annual secured bill is lost or missing. | Request a duplicate bill if you did not receive the original bill. |
| Supplemental secured bill | An additional bill caused by reassessment after ownership change or new construction. | Do not ignore it, even if a lender normally pays your annual bill. |
| Adjusted secured bill | A corrected or replacement bill caused by value correction, omitted exemption, direct assessment correction, or certain penalties. | Compare the adjusted bill with the annual bill before paying. |
How to Get a Duplicate Los Angeles County Property Tax Bill
If you did not receive your annual secured property tax bill, you are still responsible for paying on time. LA County says failure to receive a bill does not cancel the payment responsibility or allow late-payment penalties to be canceled automatically.
- Find your AIN through the Assessor portal if you do not have it.
- Open the duplicate secured property tax bill request page.
- Enter the AIN and situs address if requested.
- Understand that the duplicate bill is generally sent to the mailing address on record.
- If the mailing address is wrong, use the Assessor mailing address change route.
Important: A substitute secured property tax bill is a replacement for making payment on a lost or missing original bill. It may not include every breakdown item that appeared on the original bill, so use the official bill and property tax portal for full context.
How to Search Parcel Details and Assessor Records
The Assessor side is the best starting point when your question is about parcel details, ownership-related assessment information, property characteristics, assessed value, exemptions, or mailing address. The Treasurer side is better when your question is about bill amount, payment, penalty, or payment history.
- Open the LA County Assessor portal.
- Search by property address or AIN.
- Confirm the parcel before relying on the result.
- Review assessed value, property details, and public assessment information.
- If the value or characteristics appear wrong, use the Assessor’s assessment review or appeal-related information.
| Assessor Detail | Why It Helps | Common Mistake |
|---|---|---|
| Property address | Confirms that you selected the correct parcel before looking up or paying taxes. | Selecting a nearby parcel, condo unit, or similar street name. |
| AIN | Connects the property record to tax bill, payment, balance, and payment history tools. | Using the wrong AIN from a prior property or escrow document. |
| Assessed value | Helps explain the taxable value used in the property tax system. | Confusing assessed value with current market sale price. |
| Property characteristics | Can help identify incorrect size, use, structure, or parcel details. | Calling the Tax Collector for an assessment-data correction. |
| Mailing address | Controls where property tax information is sent. | Expecting the Tax Collector to update the mailing address instead of the Assessor. |
How to Look Up LA County Real Estate Records, Deeds and Liens
Property tax bills and recorded real estate documents are not the same thing. If you need a deed, lien, recorded transfer, or older property document, start with the Registrar-Recorder/County Clerk, not only the Tax Collector or Assessor.
LA County’s Recorder says it records and maintains real estate records in Los Angeles County since 1851. Records are maintained in alphabetical indexes by name and year the document was recorded. The office does not accept telephone requests for index searches and does not provide online public access to real estate record indexes.
- Identify the record type you need, such as deed, lien, release, or recorded document copy.
- Gather names, year of recording, property address, AIN, and any document number if available.
- Use the Recorder’s real estate record pages to understand appointment or request options.
- Do not expect a complete online public index search for recorded real estate documents.
- For fire-impacted property record assistance, use the official Recorder guidance if applicable.
How to Check LA County Property Tax Payment History
Payment history is useful when you need to confirm whether you, your lender, escrow company, title company, or another payer paid the tax. It is also helpful when you need proof for refinancing, sale closing, duplicate payment review, delinquent notice questions, or refund confusion.
- Open the Treasurer and Tax Collector payment history page.
- Use the AIN or available search information requested by the county tool.
- Check the year, installment, payment date, and payment status.
- Compare county payment history with your bank, escrow, mortgage, or closing statement.
- Save a copy before contacting your lender or tax office.
If your lender says it paid, compare the lender’s record with the county payment history before paying yourself.
If both you and escrow paid, payment history can help you identify who paid and when.
If you mailed a check, compare the county record with your postmark proof, check image, and bank record.
New buyers can compare closing statement credits with actual tax payments posted to the county account.
How to Pay After You Search the Bill
Do not pay before confirming the correct AIN, property, tax year, installment, and amount due. LA County allows online eCheck, online card, telephone card, mail, and in-person payment options. Fees and transaction limits can differ by payment method.
| Payment Option | What to Know | Best Use | Official Link |
|---|---|---|---|
| Online eCheck | LA County lists no cost for eCheck payments. You need the AIN and an ACH-enabled bank account. | Best for avoiding card service fees when your bank account can be used. | Pay Online |
| Online credit or debit card | LA County lists a 2.22% service fee with a minimum $1.49 per transaction for credit/debit card payments. | Useful when card payment is preferred and you accept the fee. | Payment Options |
| Telephone payment | Phone payment uses the AIN, year, and sequence from the secured property tax bill. | Useful when you cannot complete online payment but have bill details ready. | Phone Payment Rules |
| Include payment stub, write AIN on the check or money order, and avoid staples, clips, tape, or correspondence. | Useful for check or money order payment when mailed early with proof. | Mail Instructions | |
| In person | LA County lists in-person payment at 225 North Hill Street, First Floor Lobby, during posted weekday hours excluding county holidays. | Useful for complex questions or when you need a receipt at the counter. | In-Person Payment |
Payment safety warning: Use official LA County payment pages. Avoid sponsored results, look-alike payment websites, and third-party pages that do not clearly connect to the Los Angeles County Treasurer and Tax Collector.
Los Angeles County Property Tax Due Dates
Annual secured property tax bills are prepared and mailed in October. The bill is payable in two installments. The first installment is due November 1 and becomes delinquent if payment is not received or postmarked by December 10. The second installment is due February 1 and becomes delinquent if not received or postmarked by April 10.
| Installment | Due Date | Delinquent After | What To Do |
|---|---|---|---|
| First installment | November 1 | December 10 | Search by AIN, confirm the amount, and pay before the delinquency deadline. |
| Second installment | February 1 | April 10 | Do not assume escrow paid; verify status before the deadline. |
| Supplemental bill | Shown on the supplemental bill | Shown on the supplemental bill | Pay attention because lenders do not usually pay supplemental bills automatically. |
| Delinquent or prior-year taxes | Account-specific | Already past due or defaulted | Use official delinquent tax tools and avoid guessing from an old bill. |
Penalty warning: LA County says delinquent current-year installment payments are subject to penalties. The second installment can also be subject to costs in addition to penalties if not paid timely.
Exemptions and Tax Relief to Check During a Property Search
A property tax search is not only about payment. If the assessed value or bill looks wrong, check whether an exemption, reassessment rule, disaster relief, or decline-in-value review may apply. These tasks usually start with the Assessor, not the Treasurer and Tax Collector.
| Topic | Who Should Review | What It Can Affect | Official Link |
|---|---|---|---|
| Homeowners’ Exemption | Owners who use the home as their principal residence on January 1. | May reduce assessed value by $7,000 for qualifying homeowners. | Homeowners’ Exemption |
| Disabled Veterans’ Exemption | Qualifying disabled veterans and eligible claimants. | May provide a larger property tax exemption when official requirements are met. | Disabled Veterans’ Exemption |
| Decline in Value / Prop. 8 | Owners who believe the current market value has fallen below assessed value. | May trigger review of value for the fiscal year when filed in the official period. | Decline in Value |
| Disaster Relief | Owners whose property was damaged by a qualifying disaster. | May allow tax relief when qualifying damage is shown. | Disaster Relief |
| Change Mailing Address | Owners whose tax bills or notices are going to the wrong address. | Controls where property tax information is mailed. | Change Mailing Address |
New Homeowner Search Checklist
New owners in Los Angeles County should not assume that escrow paid every tax bill. LA County explains that taxes are often prorated between buyer and seller during escrow, but the new owner is responsible for any property taxes not paid when escrow closed.
- Look up the AIN using the Assessor portal if it is not on your closing paperwork.
- Search the secured tax balance and payment history.
- Compare the county tax record with your closing statement.
- Check whether the annual bill was mailed to the prior owner.
- Request a duplicate bill if needed.
- Watch for supplemental secured property tax bills after ownership change or new construction.
- Ask your lender whether it will pay annual and supplemental bills through escrow.
Supplemental bill warning: Lenders and financial institutions do not usually pay supplemental secured property tax bills. If you receive one, review it quickly and do not assume the mortgage company will handle it automatically.
Multiple Parcels, Title Companies and Escrow Searches
Owners of multiple parcels, real estate professionals, title companies, escrow companies, and lenders may need more than a one-parcel lookup. LA County has a secured property tax information request route for multiple parcels.
- Use this route only when you need information for multiple parcels, not a simple one-property search.
- Gather each AIN and property information before submitting.
- Use the form for questions like who paid taxes, whether refunds are pending, or why a refund is being issued.
- Watch for the county’s email confirmation and response timeline.
Common LA County Property Tax Search Mistakes to Avoid
These mistakes can lead to wrong-parcel payments, missed deadlines, delayed records, unnecessary penalties, and confusion between different county offices.
Owner names can change, be abbreviated, or appear under trusts and businesses. Confirm the AIN and address before payment.
The Assessor handles value and parcel data. The Tax Collector handles bills, balance due, payments, and payment history.
Current secured tax information is not available online during every month of the year. Check the availability rules if results look missing.
Escrow credits, lender payments, and county-posted payments are different. Check payment history before paying again.
The Recorder does not provide online public access to real estate record indexes. Follow the official record-viewing instructions.
Supplemental secured bills can follow ownership changes or new construction, and lenders do not usually pay them automatically.
Los Angeles County Tax Collector Office Map
For in-person property tax payment questions, use the Treasurer and Tax Collector office information. Bring the AIN, bill copy, payment proof, escrow document, and any notice you received.
Los Angeles County Tax Collector
225 North Hill Street, First Floor Lobby
Los Angeles, CA 90012
Related Property Tax Guides on This Site
These internal guides help explain property tax terms before you take account-specific action on an official Los Angeles County website.
Official Los Angeles County Property Tax Search Links
Use these official links only when you are ready to complete a final lookup, payment, record request, exemption action, or account-specific verification.
Los Angeles County Property Tax Search FAQs
How do I search Los Angeles County property tax bills?
Use the Treasurer and Tax Collector Property Tax Balance Due page and enter the Assessor’s Identification Number. The AIN links the property to secured tax amounts, bill tools, and payment options.
What is an AIN in Los Angeles County?
AIN means Assessor’s Identification Number. It is a 10-digit number assigned to real property and is commonly formatted as map book, page, and parcel.
Where can I find my LA County AIN?
You can find the AIN on your secured property tax bill, escrow paperwork, prior tax records, or by using the LA County Assessor portal property search.
Can I search LA County property tax by address?
For parcel and AIN lookup, use the Assessor portal property address search. For tax amount due, you normally use the AIN in the Treasurer and Tax Collector tool.
How do I get a copy of my LA County property tax bill?
Use the Treasurer and Tax Collector duplicate secured bill request page. If you do not know the AIN, first look it up through the Assessor portal.
When are Los Angeles County secured property taxes due?
The first installment is due November 1 and delinquent after December 10. The second installment is due February 1 and delinquent after April 10.
Are LA County secured property tax bills mailed every year?
Yes. Annual secured property tax bills are prepared and mailed in October for the fiscal tax year and are payable in two installments.
Can I check LA County property tax payment history?
Yes. Use the Treasurer and Tax Collector property tax payment history tool to review posted payment information and compare it with bank, escrow, or lender records.
Can I look up deeds and liens online in Los Angeles County?
The Recorder maintains real estate records, but it does not provide online public access to real estate record indexes. Follow the Recorder’s viewing or copy request instructions.
What is the difference between Assessor and Tax Collector?
The Assessor handles assessed value, AIN, parcel details, exemptions and mailing address. The Treasurer and Tax Collector handles bills, payments, balance due and payment history.
Why can’t I find my current secured tax amount online?
Current year secured tax information is available online between October 1 and June 30. Delinquent secured tax information is available all year except during July.
What if I did not receive my property tax bill?
You are still responsible for paying on time. Request a duplicate secured bill and verify your mailing address with the Assessor if tax mail is going to the wrong address.
Does my mortgage company pay supplemental property tax bills?
Usually not. LA County warns that lenders and financial institutions do not usually pay supplemental secured property tax bills, so review any supplemental bill quickly.
Can I pay Los Angeles County property tax with eCheck?
Yes. LA County lists no cost for eCheck payments. You need the AIN and an ACH-enabled bank account to complete the transaction.
Is CountyPropertyTaxes.us the official LA County property tax website?
No. This is an independent informational guide. Final bill lookup, payment, official record requests, exemptions, appeals and account-specific verification should be completed through official Los Angeles County sources.
Bottom Line
For Los Angeles County property tax search, use the AIN as your anchor. Use the Tax Collector for bills, balances, duplicate bills, payments and payment history. Use the Assessor for parcel details, assessed value, AIN lookup, exemptions and mailing address. Use the Recorder for deeds, liens and recorded real estate records.
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