California Proposition 60 and 90: The Legacy Senior Property Tax Transfer Programs (Replaced by Prop 19)

Before California’s Proposition 19 transformed the rules for senior property tax transfers in February 2021, two earlier ballot measures — Proposition 60 and Proposition 90 — gave homeowners 55 and older a limited ability to carry their Prop 13 base year value to a new home when they moved. Understanding these legacy programs helps clarify the full history of California’s property tax portability system and why Prop 19 was such a significant upgrade. See our guide to California bridge loans.

What Were Propositions 60 and 90?

Proposition 60 (1986)

Passed in November 1986, Proposition 60 amended the California Constitution to allow homeowners who are 55 years of age or older to transfer the base year assessed value of their principal residence to a replacement residence within the same county, subject to these conditions:

• The homeowner must be 55 or older at the time of the sale
• The replacement home must be of equal or lesser value than the original home
• The original home must have been the owner’s principal residence
• The transfer was allowed only once in a lifetime
• The replacement must be purchased or built within 2 years of the sale of the original property (either before or after)
• Only within the same county

Proposition 90 (1988)

Proposition 90 extended the Prop 60 concept to allow inter-county transfers — but only between counties that opted in by passing their own implementing ordinances. At the time Prop 19 superseded Prop 90 in 2021, participating counties included: Alameda, El Dorado, Los Angeles, Orange, Riverside, San Bernardino, San Diego, San Mateo, Santa Clara, Tuolumne, and Ventura. Many desirable California counties (including San Francisco and Marin) never participated, limiting the program’s usefulness for seniors wanting to move to the Bay Area.

Prop 60/90 vs. Prop 19: A Direct Comparison

When Do Prop 60/90 Still Matter?

Since Prop 19 took effect on February 16, 2021, Propositions 60 and 90 are no longer available for new transfers. However, there are a few situations where understanding the old rules still matters:

Transfers That Occurred Before February 16, 2021

If a senior homeowner completed a property tax transfer under Prop 60 or Prop 90 before February 16, 2021, those transfers remain valid and grandfathered under the old rules. The homeowner used their one-time lifetime benefit; they cannot use it again under Prop 60/90 — but they may now also be eligible for additional transfers under Prop 19’s three-transfer limit (which operates as a fresh allowance, separate from the old programs).

Estate and Trust Situations

In some estate planning situations involving transfers made before 2021, the old Prop 60/90 transfer remains the operative basis for the replacement property’s assessed value. Heirs and trustees dealing with estates that include Prop 60/90 transfers need to understand the original rules to correctly interpret the tax records and plan for reassessment on any future transfer.

Understanding Why Prop 19 Was Passed

Prop 60/90’s limitations were widely criticized for creating inequities: seniors who wanted to move from Los Angeles to San Francisco couldn’t take their tax basis because San Francisco never joined Prop 90. The “equal or lesser value” requirement trapped seniors in larger homes they couldn’t afford to maintain — they couldn’t move up without losing their tax protection. And the once-in-a-lifetime limit meant one mistake cost you the benefit forever. Prop 19 fixed all three of these problems.

The Proposition 58 and 193 Connection

Propositions 60 and 90 addressed senior mobility. Two other measures addressed family inheritance:

• Proposition 58 (1986): Allowed parents to transfer any California real property to children without reassessment — the primary residence with no value limit; other property up to $1M in assessed value
• Proposition 193 (1996): Extended similar benefits to grandparent-to-grandchild transfers

Like Prop 60 and 90, these were superseded by Prop 19. Under current law, only a primary residence the heir occupies as their own home receives any exclusion — and it’s capped. All other family transfers trigger full reassessment. The era of passing California real estate empires to the next generation at 1978 tax rates is largely over.

What California Seniors Should Do Now

If you’re 55 or older and considering a move within California, Prop 19 now offers dramatically better terms than the old Prop 60/90 rules. Key steps:

1. Confirm your eligibility — you must be 55+ and the property must be your current principal residence
2. Understand the blended value formula if you’re buying a more expensive home (you don’t need to downsize)
3. File the exclusion claim with your new county’s assessor within 3 years of purchase (Form BOE-19-B or equivalent)
4. Coordinate financing carefully — if you need to sell before buying, consider a bridge loan; if you buy before selling, plan your 2-year window
5. Consult a mortgage broker who understands how Prop 19 portability affects your DTI and qualifying taxes on the replacement property

Planning a move in California and want to protect your property tax base? DiVita Home Finance works with senior homeowners throughout California to structure their mortgage and timing around Prop 19 portability. Contact us for a free consultation.

→ See: Prop 19 Complete Guide — How to Transfer Your Property Tax Base in 2026

→ See: California Prop 13 — The Foundation of Property Tax Law

→ See: California Reverse Mortgage Guide — Another Option for Seniors