What is the January 1 lien date in California property tax?
What is the January 1 lien date in California property tax?
January 1 is California's lien date — the property's value and ownership are fixed as of that date for the tax year, so appeal evidence should reflect market conditions on or near January 1.
California's lien date is January 1. The property's taxable status, ownership, and value for the coming fiscal year (July 1–June 30) are all determined as of that single date. This is the reference point for every appeal: when you argue your home is over-assessed, the question is what its full cash value was on January 1, not on the date you file or the date of the hearing.
The lien date anchors the lesser-of comparison in Cal. Rev. & Tax. Code §51: the assessor enrolls the lesser of your factored base year value or the market value as of the lien date. A Proposition 8 decline-in-value claim therefore stands or falls on comparable sales clustered around January 1 — sales months later that show a recovery (or a further drop) are generally less persuasive than sales near the lien date.
Practical implications for an appeal:
- Gather comps near January 1. The strongest evidence is arm's-length sales of similar properties closing in roughly the fourth quarter of the prior year through the first quarter of the assessment year.
- Mid-year events don't change the regular lien date — a purchase or new construction after January 1 instead triggers a supplemental assessment with its own §75.31 60-day appeal clock.
- The regular appeal window to challenge the lien-date value opens July 2 under §1603, roughly six months after the lien date, and closes September 15 or November 30 by county.
The state BOE assessment appeals page frames the appeal around the lien-date value.