House Bill 2376 is a property tax reform bill that amends existing Washington statutes (including RCW 84.36.381 and RCW 84.36.383) to expand and restructure the senior citizen property tax relief program, change definitions of taxable real property, and make procedural and levy changes for state and local property tax administration. The bill modifies eligibility, benefit calculations, filing and transfer rules for the senior exemption, adjusts how income is calculated for eligibility, and changes several administrative duties and timelines for county assessors and treasurers. It also amends the state school levy provisions and exempts certain farm machinery from state-purpose property tax. The bill changes the senior citizen exemption from a single formula to tiered, income-based exemptions. Claimants can be exempt from all or part of excess and regular real property taxes in the year after a claim is filed and thereafter if they continue to qualify; exemption status may transfer to a replacement residence but a claimant may not receive exemptions on more than one residence in a year. Eligibility rules address ownership and occupancy (including cooperative shares, cotenants, life-lease situations), temporary long-term care confinement, and age/disability/veteran criteria (claimant generally 61+ on December 31 of filing year; surviving spouse/domestic partner may qualify at age 57 in specified cases). The bill establishes three income thresholds with specific dollar and county-median-percent formulas that change over calendar year ranges and prescribe benefit levels: the lowest threshold group may be exempt from all excess property taxes, the state property tax under RCW 84.52.065(2), and certain voter-approved local tax portions; middle and higher income tiers receive partial exemptions calculated as set dollar amounts or percentages of residence valuation with stated caps. The bill defines "combined disposable income" and a standard deduction ($7,500 for claimant plus $7,500 for spouse/partner) and lists many medical and related items that may be itemized, but the extracted text shows the disposable income definition is truncated and incomplete. The bill expands the statutory meaning of "real property" to include mobile homes fixed on foundations (with mobile homes on leased land treated under personal property billing rules), defines "residence" and accessory dwelling unit and acreage limits, and requires county tax statements to identify the state property tax as the "state school levy." It imposes procedural requirements for tax statement distribution and for county treasurers (including not accepting payments until the tax roll is completed), sets on-time payment dates (first half April 30, second half October 31) and split-payment rules, and makes multiple changes to delinquency interest, penalty, notice, referral, and payment-agreement procedures. Key delinquency changes in the extracted text include lowering interest to 9% per annum for small residential parcels beginning 2023 (12% remains for others), suspending penalties during 2022, and imposing a 3% penalty on June 1 and an additional 8% on December 1 for specified property types beginning 2023; the treasurer must provide delinquency notices, refer long-term delinquents to homeownership resource centers, may assess foreclosure avoidance costs, and may waive interest and penalties for income-qualified owner-occupied properties under specified conditions no earlier than 60 days before three years of delinquency. The bill also changes state school levy mechanics and limits: it specifies historical aggregate rates for 2018–2021, subjects subsection (2) levies to chapter 84.55 RCW beginning tax year 2022, sets an aggregate rate limit of $3.60 per $1,000 for 2022 and thereafter with pro rata reductions if exceeded, and sets the state property tax levy rate at $2.095 per $1,000 for collection in 2026 (with certain sections effective for taxes levied in 2026 and others in 2027). RCW 84.36.630 is amended to exempt personal property machinery and equipment owned by a farmer and used exclusively in producing agricultural products from state-purpose property taxes, with a required county assessor claim filed on prescribed forms. The extracted material is incomplete in places: the disposable income definition continues beyond the provided text, some referenced subsections and amendments (for example to RCW 84.38.020 and RCW 84.56.020) and the full text of several procedural provisions are not included in the extracted facts, so the precise final wording and some operational details cannot be fully determined from the provided excerpts.

If enacted, lower‑ and middle‑income homeowners who are seniors, disabled, veterans, or qualifying surviving spouses will likely pay much less in property taxes. The bill creates three income tiers that expand and specify how much of a home’s value can be exempt from regular and certain state school levies, allows the exemption to transfer to a replacement home when someone moves or is displaced, and lets assessors require income proof by May 31 after application; the lowest tier can be exempt from all excess taxes and the state school levy, while higher tiers get large exemptions on portions of assessed value (with dollar and percentage caps). These changes make staying in or moving between homes less likely to trigger a big tax increase for eligible people, but exact savings for families depend on county median incomes and some definitions that are incomplete in the available text. Counties and the state will see operational and revenue impacts: county treasurers must not accept payments until the tax roll is complete, must meet tighter tax statement and collection timing, may offer electronic payments, and face a revised delinquency regime that lowers interest for small residential parcels, suspends penalties for 2022, creates a new penalty schedule for other property types, and allows waivers of interest and penalties for income‑qualified homeowners facing foreclosure while requiring referrals to housing resource centers. The bill also treats fixed mobile homes as real property in some cases and exempts farmers’ machinery from state property taxes if used exclusively for production, which will change who pays what and shift some administrative and collection burdens; several definitions and cross‑sectional details needed to calculate exact fiscal effects are missing from the provided text.