California property tax runs on a precise vocabulary. Assessors, attorneys, and claim forms all use these words in an exact sense, and a family that misreads one of them can lose a low tax base built up over decades.
The pages below define the terms and show the arithmetic. Each definition page explains one term in plain language, and two calculation pages walk through the numbers that decide an actual tax bill. Start with the term in front of you, then use the full glossary at the bottom for everything else.
Key Facts
- Proposition 13 sets a property’s starting value and limits how fast that value can rise, so the county taxes that protected value rather than today’s market price.
- A change in ownership is the event that resets a California property’s taxable value to current market value. Every exclusion in this area of law exists to avoid that reset.
- A claimant is the property owner who files a Proposition 19 tax-base transfer, and that person must personally qualify for the benefit.
- Stepped-up basis cuts the capital gains tax an heir owes on an inherited California home. It works on income tax and does not change the property tax base.
- California taxes every capital gain as ordinary income no matter how long you held the asset, while federal rates fall the longer you hold.
- The full glossary collects the rest of the vocabulary, grouped by where you will meet each term.
The Two Propositions
Two ballot measures set almost every rule that follows. Read these first if the vocabulary is new to you.
- Proposition 13: California’s 1978 Property Tax Cap
The foundation of the whole system. It sets a property’s starting value, limits how fast that value can rise, and holds until the value resets to today’s market price. - Proposition 19: California’s 2020 Property Tax Trade
The 2020 measure that moved in two directions at once. It gave older, disabled, and disaster-affected homeowners a new right to carry their low tax base anywhere in the state, and it took away most of a family’s ability to pass that low base to heirs.
Settling an Estate
These four terms come up when a family settles an estate and decides who owns the house and who signs the claim.
- Probate: How California Settles an Estate, and Why Families Plan Around It
The court process for settling a deceased person’s estate. In California it is slow, public, and expensive enough that avoiding it is a central goal of estate planning. - Partition Lawsuit: When California Co-Owners Cannot Agree on a Shared Home
The way one co-owner can force the division or sale of a property when the owners cannot agree. Any co-owner can start one. - Authorized Representative: Who Can Sign and File Your California Proposition 19 Claim
The person who may legally sign and file a Proposition 19 claim on an owner’s behalf. A real estate agent usually cannot, and the article shows where a power of attorney fits. - Claimant: Who Can File a Proposition 19 Tax-Base Transfer
The property owner who files the claim. The claimant must personally qualify for the benefit, and the article covers the three eligibility tests, the ownership and residency requirements, and how married couples are treated.
Tax Terms That Trip People Up
Both terms below belong to income tax, not property tax. Families mix them up because they surface in the same conversation about an inherited home.
- Capital Gains Tax: The Federal and California Rules for a Sale
The income tax you owe on the profit from selling an asset. Federal rates drop the longer you hold, while California taxes every gain as ordinary income no matter how long you held it. - Stepped-Up Basis: How It Cuts Capital Gains Tax on an Inherited California Home
A tax break that cuts the capital gains tax an heir owes on an inherited California home. The article works a simple example and covers a step down in value, the bigger step-up for married couples, and a home given away before death.
Work Out Your Own Numbers
Definitions only take you so far. These two pages show the arithmetic, line by line, with figures you can pull from your own tax bill.
- Prop 19 Tax Savings Estimator: How Much Will You Save When You Move?
Estimate your savings in six lines. Buy equal or lesser and your base transfers whole. Buy up and only the price difference is added. - How to Calculate Partial Reassessment Under Prop 19: A Step-by-Step Guide
What happens when an inherited home is worth more than the Proposition 19 value limit. The property is partially reassessed rather than fully reassessed, so you keep part of the low base and pay market rates on the rest.
The Full Glossary
The pages above go deep on the terms that decide the most money. For everything else, use the Proposition 19 glossary of California property tax terms. It is the parent reference for this section, and it groups the vocabulary by where you will meet it: the Proposition 13 foundations, the terms for moving your tax base, and the terms for inheriting a home.
Get the Book
Prop 19 Hero puts all of this vocabulary in one place, in the order the law applies it, across fourteen chapters. It is available on Amazon as a Kindle book for $5.99, free with Kindle Unlimited.
Bart Hubbard wrote it for California homeowners 55 and older who want a clear answer before they list a home or settle an estate. Read more about Bart Hubbard and why he wrote this guide.
About the Author
Bart Hubbard is a California real estate associate at HomeSmart ICARE Realty (DRE #01815497) and a C.A.R. Certified Probate & Trust Specialist. He wrote Prop 19 Hero to give California homeowners 55 and older a clear, practical guide to the property tax rules that affect every move they make. He works with buyers and sellers throughout the Sacramento area. Reach him at info@prop19hero.com or www.prop19hero.com. More about Bart Hubbard.
