What CPAs Should Know About Prop 19 Before Advising Clients to Sell or Hold
If your clients own highly appreciated real estate in the Bay Area, the decision to sell or hold is one of the most consequential financial choices they will make. And the tax and estate implications are more layered than most practitioners have had time to fully untangle.
Here is the plain summary: Prop 19 changed the inheritance rules for California property in 2021, stepped up basis remains a powerful planning tool but is not always the right call for every family, and the timing of when a client sells relative to their estate plan can have real consequences. The best outcomes usually happen when the CPA, estate attorney, and real estate professional are working from the same page early in the conversation.
I am Katrina Carter, an East Bay real estate broker and loan officer who works closely with clients making significant equity decisions. I work alongside CPAs and estate attorneys frequently, and I have put together this post for professionals who want a working reference on the real estate side of these conversations.
What Prop 19 Changed and Why It Matters to Your Clients
Before Prop 19, California homeowners could pass a property of any value to their children with the original property tax basis intact. A child could inherit a $2.3M Danville home that was taxed at a $350,000 assessed value and keep that low tax rate indefinitely, whether they moved in or rented it out.
Prop 19 ended that for most transfers. Now, for a child to maintain the inherited property tax base, they must move into the home as their primary residence within one year of the transfer. If they do not, the property is reassessed at full market value. There is also a cap: if the inherited home has a market value more than $1M above the original assessed value, even a child who moves in will see a partial reassessment on the excess above that threshold.
This is a major shift, and a meaningful number of clients have still not internalized it.
The Capital Gains Exclusion: Where Bay Area Clients Get Surprised
The federal exclusion for capital gains on a primary residence is $250,000 for single filers and $500,000 for married couples filing jointly. In most of the country, that exclusion covers the full gain. In the Bay Area, it often does not.
A client who bought a home in Lafayette for $400,000 in 1998 and is now looking at a $2.3M sale has roughly $1.9M in appreciation. Even with the $500,000 exclusion for a married couple, they are looking at approximately $1.4M in taxable gain. At the combined federal long term capital gains rate plus California's rate, this is a significant event. Clients often need help modeling this before they commit to a decision, and that modeling requires accurate current value data from a real estate professional.
Stepped Up Basis: When Holding Makes Sense and When It Costs More Than It Saves
Stepped up basis at death can eliminate much of the capital gains exposure on an appreciated property, which is why many Bay Area families have historically held real estate rather than selling. This strategy still works and is still the right call in many situations.
But there are scenarios where the calculus shifts. A client who is 78 and living alone in a $2.5M home that no longer fits their life may be better served selling now, using the $500,000 exclusion, taking a Prop 19 portability transfer to a smaller home, and putting the remaining proceeds into a structured financial plan. The cost of the taxable gain may be lower than assumed once all the variables are modeled together.
Prop 19 Portability: The Planning Opportunity Many Clients Miss
Homeowners who are 55 or older, severely disabled, or whose home was destroyed in a declared disaster can transfer their existing property tax basis to a replacement home anywhere in California. Eligible homeowners 55 and older can use this portability transfer up to three times in their lifetime. This is one of the most powerful tools available to longtime Bay Area homeowners who want to right size or relocate without losing their tax base, and it is still significantly underutilized. Many clients do not know it applies to them until someone in their advisory circle brings it up.
How I Work Alongside Tax and Estate Professionals
My role is to give your client accurate, real world data on what their property is worth, what they would net after costs and commissions, and what their realistic options are on the real estate side. I do not provide tax advice. But I can translate the real estate variables into numbers your client can bring to you, so that the planning conversation is grounded in something concrete rather than a rough estimate.
I recently worked with a family whose father was in his mid 80s and still living in a $2.8M home in the hills. His estate attorney and CPA had been advising him to hold for stepped up basis. When I ran the net proceeds numbers on a sale versus a Prop 19 portability move to a smaller home, the picture looked meaningfully different than anyone had estimated. The family ended up having a much more informed conversation with their advisors, and they ultimately made a decision that worked better for the whole family.
If you have clients who are holding significant Bay Area real estate and weighing their options, I am happy to be a resource. A 20 minute call can sometimes change the shape of the planning conversation entirely.
FAQ
When should a CPA loop in a real estate professional on a Prop 19 discussion?
As early as possible in the planning conversation. The current property value and projected net proceeds are input variables for the tax and estate modeling. Having accurate numbers early leads to better planning.
Does Prop 19 apply to commercial or rental properties?
No. Prop 19 applies to primary residence transfers between parent and child or grandparent and grandchild. Investment properties and commercial real estate do not qualify for the inherited tax base provisions.
Can a client use the Prop 19 portability transfer and then eventually sell the new home?
Yes. The portability transfer applies to the replacement home they purchase. That home can be sold at a later date, at which point the normal rules apply to any new purchase.
Is there a deadline for completing the Prop 19 portability transfer?
The replacement home must be purchased within two years of the sale of the original property for the transfer to qualify.
Katrina Carter
Broker Associate | Loan Officer
Call or text: 510.288.6002
