California's two property tax laws that every 55+ buyer needs to understand before making any offer. Prop 13 caps what you pay. Prop 19 lets you keep paying what you've been paying — even after you move. Worked examples at real IE price points.
Proposition 13 passed in 1978 and fundamentally restructured California property taxation. Before Prop 13, California assessed properties at market value annually — rising home prices meant rising tax bills, and many long-term homeowners were being taxed out of homes they had owned for decades.
Prop 13 established three key rules that still govern California property tax today:
Rule 1: The assessed value of your home is reset to the purchase price when you buy it. This becomes your base assessed value for Prop 13 purposes.
Rule 2: The annual property tax rate is capped at 1% of assessed value (plus voter-approved bond overrides, which typically add 0.10–0.40%). The total effective rate is usually 1.10–1.40% of assessed value.
Rule 3: Your assessed value can increase by no more than 2% per year, regardless of what happens to market values. If home prices jump 20% in a year, your assessed value grows only 2%.
The practical result: a California homeowner who bought in 1990 and still lives in the same house pays property tax based on a 1990 purchase price grown at 2%/year — far below current market value. This is why California homeowners with decades of tenure have dramatically lower property taxes than new buyers of equivalent homes.
Proposition 19 took effect February 16, 2021. It replaced the prior transfer provisions (Props 60/90) with a broader, more flexible system for 55+ homeowners.
California homeowners who are 55 or older, sell their primary residence, and purchase a replacement primary residence anywhere in California can transfer their existing Prop 13 assessed basis to the new home. This is allowed up to 3 times in their lifetime.
If the replacement home costs less than the sold home (buying down): the assessed basis transfers dollar-for-dollar. Your new assessed value equals your old assessed value.
If the replacement home costs more than the sold home (buying up): the assessed basis transfers with an adjustment. New assessed value = old assessed value + (new home price − old home sale price). Only the amount above the old sale price is assessed at market value.
The Prop 19 transfer is not automatic. You must file form BOE-19-B (Claim for Transfer of Base Year Value to Replacement Primary Residence for Persons at Least 55 Years) with the county assessor in the county where you purchased the replacement home.
For IE communities in Riverside County (Menifee, Beaumont, Temecula, Murrieta, Hemet, Corona): file with the Riverside County Assessor. For Apple Valley communities (San Bernardino County): file with the San Bernardino County Assessor.
The filing deadline is 3 years from the date of purchase of the replacement home. Filing after 3 years means you forfeit the transfer, so treat this as a must-do within the first year of ownership. The form is available on the California Board of Equalization website and through each county assessor's office.
Out-of-state buyers do not qualify: Prop 19 requires both the sold property and the replacement property to be in California. Buyers moving from Texas, Oregon, Nevada, or any other state to the IE do not qualify for Prop 19 basis transfer — they will be assessed at their full purchase price. This is one reason the financial comparison between California and other states is not as simple as California's headline tax rate makes it appear.
The Inland Empire's price advantage relative to coastal California creates one of the best Prop 19 scenarios in the state. A Bay Area seller exiting at $1.2M buys down to a $480,000 Four Seasons Beaumont home and transfers a $300,000 assessed basis. An OC seller exiting at $900K buys down to a $380,000 Sun City Menifee home and transfers a $260,000 basis. In both cases, the assessed value after transfer is far below the purchase price — generating permanently lower property taxes than a buyer without the transfer right would pay on the identical home.
This is why the demographic of buyers in the IE 55+ market is so heavily weighted toward California sellers. Non-California buyers are paying full-market assessed values. California buyers with long-held homes are paying fractions of it. The tax advantage for California sellers is real, substantial, and permanent.
Our IE specialists can run your exact numbers — sale price, current assessed value, target IE purchase price — and show you what the annual and 10-year savings look like at any community.
Talk to an IE Specialist