AB 921 carves out a narrow regulatory and fiscal package for portable and emergency backup generators. It amends the Health and Safety Code to exclude the sale or purchase of portable or emergency backup generators from state Air Resources Board (ARB) emissions regulations during any Governor-declared state of emergency caused by loss of electrical service.
Separately, it establishes temporary income/corporate tax credits and a time-limited sales-and-use tax exemption intended to encourage generator purchases.
The bill’s fiscal measures are temporary and targeted: income and corporation tax credits are available for purchases during the 2026–2030 window, and a statewide sales-tax exemption applies only for the month of May in a five-year period starting in 2027. The measures include reporting and performance indicators intended to track uptake and revenue impacts.
Together the regulatory carve-out and the incentives shift demand for backup power equipment and create operational and compliance questions for regulators, sellers, and tax administrators.
At a Glance
What It Does
The bill suspends ARB emissions rules for sales and purchases of portable or emergency backup generators during any Governor-declared outage-related state of emergency, creates temporary tax credits for individuals and small businesses that buy eligible generators, and establishes a May-only statewide sales-and-use tax exemption for qualifying noncommercial generators. It also requires data collection and reporting tied to those tax expenditures.
Who It Affects
Generator manufacturers and retailers, residential buyers and small businesses that purchase backup generators, the California Air Resources Board and local air districts, the Franchise Tax Board (FTB) and California Department of Tax and Fee Administration (CDTFA), and point-of-sale systems and accounting teams at retail outlets.
Why It Matters
This package short-circuits parts of California’s equipment-emissions policy during outages, shifts demand toward gas/diesel backup power in specified windows, and creates a measurable fiscal exposure for the state. The combination of regulatory relief and financial incentives may change sales timing and product mix and triggers new administrative tasks for tax and regulatory agencies.
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What This Bill Actually Does
AB 921 changes three bodies of law to make it easier, for a limited time and under limited circumstances, for Californians and small businesses to buy conventional backup generators. First, it modifies the Health and Safety Code so that any ARB regulations governing emissions from portable or emergency backup generators "shall not apply" to the sale or purchase of those units while the Governor has proclaimed a state of emergency that stems from a loss of electrical service.
The existing ARB framework—originally aimed at transitioning small off-road engines toward lower or zero emissions—remains in place except during those outage-driven emergency proclamations.
Second, the bill creates temporary, refundable-style tax credits in the Personal Income Tax Law and the Corporation Tax Law targeted at purchases of backup electricity generators. The credits are available to natural persons and to small businesses (the statute defines a small business as having 50 or fewer employees).
The credits are tied to qualified purchases (generators that do not exceed a statutory cost cap) and include carryover rules if the credit exceeds the taxpayer’s liability. The Legislature also inserts specific performance goals and data-publication duties so that FTB and other agencies report uptake and revenue effects.Third, AB 921 establishes a narrow sales-and-use tax exemption: for a fixed multi-year period, gross receipts from sales and the storage, use, or consumption of qualifying backup generators are exempt from state-level sales tax—but only for purchases made during the month of May each year.
The exemption is limited to noncommercial purchases and excludes local sales taxes and state rates dedicated for local funding, creating a split between the state-level exemption and local point-of-sale tax collection.Across these changes the bill sets hard temporal limits: the tax credits are structured to apply for purchases tied to taxable years beginning on or after 2026 and before 2031, the sales-tax exemption takes effect in 2027 and runs through 2031, and the temporary legal exemptions and credits all include explicit repeal or sunset dates. The bill also layers in administrative requirements: FTB must publish anonymized usage data for the credit, and CDTFA must annually analyze and report estimates of the number of exempted generators and foregone revenue once the exemption is in effect.
The Five Things You Need to Know
The tax credits are limited to qualified generator purchases that do not exceed $7,000, and each taxpayer may claim up to $3,500 per taxable year with excess credit amounts carried forward until exhausted.
A "small business" for the credits is a business with 50 or fewer employees; the personal-income-code credit covers natural persons and small businesses, while the corporate-code credit applies only to small businesses.
The statewide sales-and-use tax exemption applies only during the month of May (from 12:01 a.m. May 1 to 11:59 p.m. May 31) for each year the exemption is in effect and applies only to noncommercial purchases and units costing $7,000 or less.
The ARB regulatory exemption applies only while the Governor has issued a state-of-emergency proclamation based on loss of electrical service and suspends the ARB's application of generator emissions regulations to the sale or purchase of portable or emergency backup generators during that declared period.
FTB must publish anonymized data on credit recipients through calendar year 2031, and CDTFA must begin annual public reporting of estimated exempt units and foregone state sales-tax revenue on or before October 1, 2028.
Section-by-Section Breakdown
Every bill we cover gets an analysis of its key sections.
Emergency-time suspension of ARB generator-sale rules
This amendment leaves the ARB’s authority and prior timelines intact but inserts an explicit carve-out: during any Governor-declared state of emergency tied to loss of electrical service, ARB regulations "shall not apply" to the sale or purchase of portable or emergency backup generators. Practically, that means dealers and consumers may buy units that would otherwise be restricted while an outage emergency is in effect. Implementation questions arise immediately — for example, how retailers will verify that a sale occurs during a proclamation window, and whether warranty, labeling, or disclosure rules tied to ARB compliance remain applicable.
Personal income tax credit for generator purchases
This new section creates a credit against California personal income tax for natural persons and small businesses for qualified generator purchases, with definitions, per-year caps, and a carryover mechanism. It also inserts the statutory goal and performance indicators required under Section 41: encouraging purchases that protect health and safety, tracking how many taxpayers claim the credit, and requiring FTB to publish anonymized data through 2031. From an administrative perspective, FTB must adapt forms, instructions, and data-publishing workflows and handle carryovers across tax years.
Corporate tax credit for small businesses
This provision mirrors the personal-income credit but limits eligibility to small businesses as defined in the bill (50 or fewer employees) and sits in the corporation tax code. It follows the same dollar cap and carryover rule but does not include the same data-publication provisions found in the personal-income section. The difference in placement affects which entities can claim the credit and creates parallel compliance tracks for FTB to administer.
May-only state sales-and-use tax exemption and reporting duties
This section carves out a narrowly timed exemption from state sales-and-use tax for qualifying backup generators purchased in May, across a five-year window. It limits eligible units to noncommercial purchases with a statutory price cap and explicitly excludes local sales taxes and state rates dedicated to local funding (including revenue deposited to the Local Revenue Fund 2011). The section also places reporting duties on CDTFA to estimate the number of exempted units and revenue forgone and to publish annual analyses starting in October 2028, which will be the primary source for assessing the exemption’s fiscal effect.
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Explore Energy in Codify Search →Who Benefits and Who Bears the Cost
Every bill creates winners and losers. Here's who stands to gain and who bears the cost.
Who Benefits
- Households and residents in outage-prone areas — get easier access to backup power during declared electrical emergencies and may qualify for state tax relief for purchases made within the eligibility window.
- Small businesses with 50 or fewer employees — can claim the corporate or personal-income-code credit for generator purchases, lowering net acquisition cost and improving business continuity during outages.
- Generator manufacturers and statewide retailers — stand to gain short-term demand spikes from the May exemption and from purchases made during emergencies when ARB restrictions are lifted, improving near-term sales volumes.
Who Bears the Cost
- California General Fund/state coffers — the state absorbs revenue loss from credits and the statewide sales-tax exemption, plus administrative costs for FTB and CDTFA to implement reporting and new return line items.
- CDTFA, FTB, and retailer accounting systems — must implement new exemption handling, reporting, and data publication workflows, and retailers must adjust POS configurations for a month-limited exemption that excludes local taxes.
- Air-quality regulators and public health bodies — the ARB’s temporary suspension of emissions rules for sales/purchases during declared outages risks increased local emissions during periods of high exposure, potentially creating public-health and monitoring costs.
Key Issues
The Core Tension
AB 921 trades air-quality and emissions goals for immediate outage-resilience: it tries to protect lives and businesses by making generators more available and cheaper in the short run, but in doing so it weakens the regulatory and fiscal pressure that encourages cleaner backup-power technologies—forcing policymakers to choose between short-term resiliency and long-term decarbonization objectives.
The bill resolves one policy problem—encouraging backup-power acquisition during and around outages—by trading off another core objective of California policy: emissions reduction. Suspending ARB rules for sales and purchases during a declared outage removes a regulatory lever that pushed equipment toward lower-emission or zero-emission technologies.
That trade-off is time‑limited and tied to emergencies, but the market signal is blunt: suppliers and consumers may accelerate purchases of conventional generators in response to the incentives and carve-outs, potentially undermining long-term decarbonization trajectories.
Implementation details create additional ambiguity. The statutory language suspends ARB application to "sale or purchase" during a proclamation, but it does not specify operational mechanics for dealers, shipping/fulfillment timing, or how to treat preorders and reservations executed before the proclamation but fulfilled during it.
The sales-tax exemption’s May-only window raises predictability and administrative questions: point-of-sale systems must distinguish state exemption from local taxes and LR2011-dedicated rates; retailers will need procedures for returns, exchanges, and online sales crossing jurisdictional boundaries. On the tax side, the credits’ carryover rules and the split treatment between personal and corporate sections will require careful guidance from FTB to avoid misclaims and disputes.
Finally, the bill’s reporting requirements are necessary but limited in scope. FTB’s anonymized disclosure and CDTFA’s estimation duty create visibility into uptake and fiscal impact, yet neither requirement addresses distributional outcomes—e.g., whether credits mainly subsidize higher-income households that can afford $7,000 purchases.
The statute also leaves open whether emergency-related suspension will be interpreted narrowly (strictly sales made within proclamation hours) or broadly (relaxing compliance for stock sold while an emergency exists), which will materially affect emissions and enforcement outcomes.
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