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Business Property Tax In California: What You Need To Know

Posted by James Frazier on Mar 9, 2018 8:20:09 AM

Business Property Tax In California: What You Need To Know

Business property tax in California has continued to increase in recent years. In fact, in 2016, California had the largest dollar increase in the U.S. in business property tax revenue—$1.8 billion more than the year before. (It remains to be seen what impact this proposed state constitutional amendment would have on the commercial property tax rate in California should it be passed.)

One thing you can count on year after year is that the business property tax cycle in the Golden State will always be a little unconventional, because some aspects of filing, billing, and appeals are handled differently than they are in other states. We’ll take a look at some of the highlights unique to California in the sections below.

Business Property Tax Due Dates In California

Whereas many states in the union vary their due dates from county to county, California has fairly uniform property tax due dates. 



1/1  Lien date for all property

Tax filing in any given year includes those assets on the books as of 1/1 the year of the filing (i.e., a tax return for 2018 includes all assets on the books as of 1/1/2018).

4/2  Return deadline

Though the due date is stated as 4/2, returns are not considered delinquent if received before 5/7.

4/10  Second installment of secured taxes due for the prior year

“Secured” property is any property that can’t be moved, like land or buildings. Secured property bill payments are paid in two installments. (This article may refer to secured property as real estate.)

6/1 - 8/1 Tax bills issued


8/31  Unsecured taxes due for current year

All property that is not secured by real property is considered personal property and is therefore “unsecured.” California personal property bill payments are due 8/31, in one installment. (This article may refer to unsecured property as personal property.)

9/15 - 11/30  Appeal deadlines

These vary in some locations.

12/10  First installment of secured taxes due for current year



Here’s what you need to know about each stage of the business property tax cycle in California:  

Tax Returns

  • In California, you must file a personal property tax return if you own taxable personal property totaling more than $100,000, or if the assessor has requested a filing. (We recommend that, to be safe, all businesses file a property tax return regardless of the amount.)  
  • All counties send a blank return form that is typically barcoded, which helps to speed up processing on their end. Note: If you’re using software to complete your tax forms, make sure it automatically prints the blank, barcoded return along with the completed form; the return will be considered incomplete without it!

California barcode

  • While the return due date is stated as 4/2, you can still file your returns until 5/7 without being considered late.
  • California non-taxable or exempt asset classifications include:
    • Business Inventory: All tangible personal property that will become part of or are themselves items held for sale.
    • Application Software: Microsoft Excel and QuickBooks, for example.
    • Licensed Vehicles
  • Incomplete return forms may be subject to penalty, for example, a return without a “wet” (actual, not computer-generated) signature. Note: If you are using a software system to prepare and file returns, ensure that your signature does not print out automatically on California returns!

Is keeping up with numerous state filings posing a challenge to your tax team? Read about the tax trends that are making teams like yours more productive.


  • Assessors across California typically use the cost approach for personal property valuation (the original cost of an asset less depreciation). In regard to real estate, the market approach is used, looking at historical sales price plus any inflation factors.
  • Assessors do not send out a notice of assessment for business personal property. The actual tax bill issued will have the assessor’s valuation information as well as the taxes due. You may review the assessment information on the tax bill and, if you disagree, appeal the valuation.
  • California counties are also known to send “escape assessments” that reflect adjustments to your property’s values from years past, which could result in a potential increase of taxes due. Make sure you stay on top of these to mitigate any unfair/high tax bills!


  • If you feel the value on your property is too high, you may choose to file an appeal to the county Assessment Appeals Board. Filings of this nature are formal and must be in writing.
  • Once the appeal is received, the Board may schedule a series of hearings to allow you to present data and evidence to support your argument of the value.
  • In the event your appeal is initiated but not yet complete by the first installment due date, you must still pay the taxes due. If your appeal is successful, you’ll be issued a tax refund for the difference in tax amount based on the liability reduction.

Didn't file any appeals last year? That's one sign your property tax software is underperforming. Check out the other 11 signs it might be time to switch.

Tax Bills

  • The Treasurer-Tax Collector for each county is responsible for issuance and collection of all property taxes within the county. The tax amount owed is calculated by multiplying each jurisdiction’s tax rate by the valuation set by the assessor, then summing them to get the total tax due.
  • Secured taxes are given a two-installment payment option; unsecured taxes (business personal property) must be paid in full in a single installment.
  • In just about every California county, if payment is not received by the due date(s), collectors may add a 10% penalty in addition to the tax amount due.
  • California may also send supplemental bills apart from the standard tax bills. Supplemental bills are sent in response to a change in ownership, new construction, or a completed property tax audit and can be sent at varying points throughout the year. (Don’t be surprised to receive a supplemental bill related to a filing three years ago!) Note: Using software helps you identify supplemental bills and associate them with the correct filing from previous years.


Want to make filing your business property taxes in California easier?

CrowdReason property tax software can help. For businesses with numerous properties in California, automating your data entry with MetaTaskerPT saves time. Our technology extracts all available content from your scanned tax documents with a high degree of accuracy, locates related system records, and instantly updates your system—freeing up your valuable human resources. Average turnaround time is less than 24 hours.    

And TotalPropertyTax (TPT) software makes it easy to prepare and file California returns. It allows you to depreciate assets in minutes; helps manage your assessment notices, deadlines, and appeals; and can even integrate with your current accounts payable system to help track and pay your bills. Our software also ensures you get the process right for California—everything from accurate depreciation schedules to barcoded forms to wet signatures to tracking supplemental bills.

Visit our website to find out more, or contact us to talk about how our software can solve your company’s biggest tax challenges!

Download Now: 12 Signs It’s Time To Switch Property Tax Software

Topics: Business personal property tax