What is the San Diego County Supplemental Tax Bill and Do I Need to Pay it?

Real Estate Agent with eXp Realty of California, Inc. CA DRE #01490977

What is the San Diego County Supplemental Tax Bill and Do I Need to Pay it?


For those buyers purchasing a new home (new construction or resale) in San Diego County, you will receive one or more Supplemental Tax Bills sometime in the 6 – 12 months following your close of escrow (I got that time frame direct from the San Diego County Tax Office) – the dates may vary for mailing the San Diego Supplemental Tax Bills.


Property Taxes and Supplemental Taxes in San Diego CountyAll San Diego County real property is required to be reassessed following a change of ownership (or the completion of new construction). When you purchase a home you take on the current tax assessment and billing and are required to pay the property tax due according to the standard property tax payment schedule:


  • Fiscal year begins – July 1
  • 1st installment due Nov. 1
  • 1st installment delinquent date Dec. 10
  • 2nd installment due Feb. 1
  • 2nd installment delinquent date April 10
  • Annual property tax bills are mailed in October (both installment coupons)


Given when the home was last assessed, the current assessment and tax amount might be higher or lower due to shifts in pricing and property values, the purchase price, and other factors.


The San Diego County Supplemental Tax Bill will reflect the reassessment and the increase OR decrease in the tax amount due. The Supplemental Tax Bills are sent to the property owner, NOT the lender (even if you are escrowing money each month in your mortgage payment for tax purposes, i.e., an impound account).


For more details on everything you should know about your San Diego County property taxes and Supplemental Tax bills, visit the San Diego Treasurer-Tax Collector website.


Homeowners can pay their San Diego property tax bills on-line, too.

Posted by

Jeff Dowler, CRS
Certified Residential Specialist / Realtor®

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Comments (15)

George Souto
George Souto NMLS #65149 FHA, CHFA, VA Mortgages - Middletown, CT
Your Connecticut Mortgage Expert

Jeff this is great information for new construction buyers.  An unexpected tax bill is not anything anyone wants to get.

Mar 13, 2012 04:48 AM
Elizabeth Straessle, MRP
All American Home Source Realty, LLC - Corpus Christi, TX
~Military Spouse~ AllAmericanHomeSourceRealty.co

Good information. I remember when I was an agent in San Diego this was so confusing for people.

Mar 13, 2012 04:56 AM
Harry F. D'Elia III
RentVest - Phoenix, AZ
Investor , Mentor, GRI, Radio, CIPS, REOs, ABR

Always truste your local professional with the local laws and regulations

Mar 13, 2012 06:31 AM
Eileen Hsu
Douglas Elliman Real Estate - Manhattan, NY

Definitely important information for new buyer's. I find that property assessment is something that can be quite different from a geographical stand point so understanding the local market you are buying in is very educational.

Mar 13, 2012 10:29 AM
Joan Whitebook
BHG The Masiello Group - Nashua, NH
Consumer Focused Real Estate Services

This is important information for buyers.  I think the same sort of thing applies in other states as well. 

Mar 13, 2012 12:18 PM
Jeff Dowler, CRS
eXp Realty of California, Inc. - Carlsbad, CA
The Southern California Relocation Dude

George - well people need to know. The problem is you do not know how they are going to be reassessed.

Elizabeth - and it is more so now since prices have shifted around so much. The good news is that people buying homes that were purchased at the peak 2005-2006 are likely going to see a drop in their property taxes sometime after closing, although it may takes months.

Harry - thanks. And we have a pretty good tax site to use as a reference and to share with clients.


Mar 13, 2012 02:08 PM
Christine Donovan
Donovan Blatt Realty - Costa Mesa, CA
Broker/Attorney 714-319-9751 DRE01267479 - Costa M

Jeff - I was having this conversation with a buyer just today and explaining why they can't just ignore it.

Mar 13, 2012 03:00 PM
John Juarez
The Medford Real Estate Team - Fremont, CA

Great information, Jeff. This is information that should be reviewed with every home buyer. Helping a new home owner to avoid those nasty surprises like an unexpected tax bill is part of the value that a competent Realtor should add to the buyer’s transaction. The bill will still be unwelcomed but at least it will not be a surprise.

Mar 13, 2012 03:04 PM
Jeff Dowler, CRS
eXp Realty of California, Inc. - Carlsbad, CA
The Southern California Relocation Dude

Eileen - so true. And taxes are often question asked by buyers, and a significant financial burden. They need to understand the possibilities. We also have a notice about supplemental taxes in our disclosures so buyers ARE informed they will receive such a tax billand it may mean an increase.

Joan - I suspect that is true. One difference here in CA (which may be true elsewhere) is that the law places limits on how much taxes can go up in a given year, other than through construction/significal remodels and similar issues.


Mar 13, 2012 03:34 PM
Jeff Dowler, CRS
eXp Realty of California, Inc. - Carlsbad, CA
The Southern California Relocation Dude

Christine - and if they do there are significant penalites, and they risk having a lien placed on the home.

John - absolutely. I always talk about it with buyers and explain in general terms how it works, even though they must sign off on the supplemental tax bill disclosure. No one likes a surprise but at least they know it may be coming. And there are appeal procedures.


Mar 13, 2012 03:37 PM
Doug Bullwinkel
Envoy Mortgage,NMLS ID 6666 - Sacramento, CA
Mortgage Loan Originator NMLS #281609

These supplemental tax bills haven't been as much of an issue during the past 4 or 5 years as property values have declined and in many cases, so have the property taxes.  Thanks for reminding everyone how important these can be and that they shouldn't be ignored.

Mar 13, 2012 06:38 PM
Joni Bailey
101 Main St. Realty - Huntsville, TX
Your Huntsville / Lake Livingston Area REALTOR®
This is great information for your readers! Congratulations on the feature!!
Mar 13, 2012 09:02 PM
Michael Setunsky
Woodbridge, VA
Your Commercial Real Estate Link to Northern VA

Jeff, this is good information for buyers so they won't be blind sided when the tax bill comes in the mail.

Mar 13, 2012 11:19 PM
Jeff Dowler, CRS
eXp Realty of California, Inc. - Carlsbad, CA
The Southern California Relocation Dude

Doug - yes, that is true for many. I've had a few who bought homes that were originally purchasse quite some time ago and had very low taxes. They went up.

Thanks, Joni. It's not a pleasant subject but a necessary one.

Michael - my hunch is that many will need a reminder. Another good way to stay in touch.


Mar 13, 2012 11:41 PM
Barbara-Jo Roberts Berberi, MA, PSA, TRC - Greater Clearwater Florida Residential Real Estate Professional
Charles Rutenberg Realty - Clearwater, FL
Palm Harbor, Dunedin, Clearwater, Safety Harbor

You know, I saw this enormous chunk of ROCK that they paid millions for in LA being hauled to some location over the weekend and streets being closed for the snail's paced transport.........and then I remember how California needs money.............DO POLITICIANS HAVE ANY BRAINS AT ALL? Why would you spend all this money on a big rock and not use that money for something REALLY useful???


Call me crazy, but I just don't get it........................

Mar 13, 2012 11:55 PM