Key Takeaways

• Producers must cut plastic packaging 10% by weight and by component count by January 1, 2027 versus a 2023 baseline, rising to 20% by 2030 and 25% by 2032.

• The supply ceiling doesn't move with sales growth. CAA's methodology caps 2026 supply at no more than 90% of 2023 levels to hit the 2027 target, tightening to 80% by 2029 and 75% by 2031 onward.

• At least 2% of the 2027 target (4% by 2030, 10% by 2032) must come specifically through reuse, refill, or elimination, not lightweighting or material swaps.

• CAA is weighing a three-year exemption from the 2027 target, citing the 16-month regulatory delay, a decision expected after ISR Plans are reviewed in August 2026.

• ISR Plans, due August 1, 2026, must report reductions across five CAA-defined pathways: reuse/refill, elimination, plastic-to-nonplastic shift, concentration/right-sizing, and PCR substitution.

  
  
  

The 2027 targets: 10%, 20%, 25%, by weight and by component

SB 54 measures source reduction two ways: by weight (total pounds of plastic packaging supplied) and by component count (individual plastic pieces, caps, lids, tags, labels, regardless of how light they are), both measured against a 2023 baseline CalRecycle established by January 1, 2025. The targets ramp up across three milestone years, set directly in PRC §42057(a)(1) and (a)(2)(C)-(D), shown below:

Reuse and refill alone carry their own floor inside the 2027 and 2030 targets: at least 2% by 2027 and 4% by 2030 must come specifically from shifting to reusable or refillable systems, per PRC §42057(a)(2)(C)-(D). Elimination joins that floor only for the final 2032 target, when reuse, refill, and elimination combined must make up at least 10% of the full 25% reduction. That means producers can't hit the 2027 target through lightweighting or material swaps alone; a real reuse or refill shift is required.

That 2032 target makes SB 54 the only U.S. packaging EPR law with a binding source reduction mandate at all; Oregon and Colorado, both also served by CAA as PRO, rely on eco-modulated fees to encourage reduction rather than a hard percentage floor. As the chart above shows, part of each milestone must come specifically from reuse, refill, or, starting in 2032, elimination, not lightweighting or material swaps alone; we break down exactly how that floor works below.

The supply ceiling: no growth allowance, even as sales climb

CAA's approach to enforcing these targets is explicit: per CAA's October 2025 source reduction consultation session, the ceiling on total plastic supply doesn't adjust for sales growth between 2023 and the target years, as the chart below shows:

Under PRC §42057(h), CalRecycle must also review the numbers every five years starting in 2030 and can require CAA to tighten source reduction further if total plastic supply creeps back up, so the ceiling isn't built to hold only through 2032, it's built to keep holding after.

In practice, this means a producer that grows sales volume 15% between 2023 and 2026 while holding its per-unit plastic use flat will still miss the target; the absolute ceiling doesn't move with revenue or unit sales. The only ways to stay under it are to reduce plastic per unit, shift volume to reuse, refill, or elimination, or use the PCR alternative-compliance path covered below.

What actually counts (and doesn't) as eligible source reduction

CAA recognizes five pathways to source reduction:

1. Shifting to reusable or refillable systems.

2. Eliminating a plastic component outright.

3. Switching to a non-plastic material.

4. Right-sizing or concentrating packaging.

5. Alternative compliance through postconsumer recycled content.

But not every change that trims plastic weight qualifies under one of these pathways. Some common substitutions fall outside the law's definition of source reduction entirely, and producers who don't check this first risk building a compliance strategy on credit they can't actually claim.

Not every reduction qualifies. A change doesn't count as source reduction if it shifts to a less-recyclable or less-compostable material or format than what it replaced. Switching from a heavy, rigid PET bottle to a lightweight multilayer film pouch is a real-world example of this: it reduces plastic by weight, but it moves from a recyclable format to one that currently isn't recyclable in California, so it doesn't earn source reduction credit.

There's one path that doesn't require cutting plastic supply at all: postconsumer recycled (PCR) content. Up to 8% of the plastic covered material sold can be met through PCR substituted for virgin plastic, on a sliding-scale credit tied to the ratio of virgin-to-PCR content. To qualify, the PCR must be validated by a third party, such as the Association of Plastic Recyclers' APR Postconsumer Resin Certification Program, and cannot contain intentionally added PFAS. We'll cover the mechanics of that credit, along with CAA's broader bonus/malus incentive structure, in an upcoming post on eco-modulation.

The exemption CAA is weighing

CAA has said the rulemaking delay, final regulations weren't approved until May 1, 2026, 16 months past SB 54's original deadline, has meaningfully compressed the runway producers had to hit the 2027 target. As a result, CAA is considering filing a “unique challenges exemption” application seeking a three-year exemption specifically from the 2027 target, not the 2030 or 2032 targets, described in Chapter 6 of CAA's program plan.

The decision isn't made yet. CAA says it will revisit this after reviewing producers' ISR Plans, due August 1, 2026: if those plans collectively show the 2027 target is within reach, CAA won't pursue the exemption. If they show the target will be missed, CAA will file for the exemption covering all applicable material categories. Either way, what producers report in their ISR Plans this August will effectively decide the outcome.

Staying ahead

The 2027 target is the first real test of SB 54's source reduction framework, and CAA's own review process means producers are effectively holding the pen on whether an exemption gets requested at all.

Here's what's coming next in this series:
1. Which covered material categories CAA is proposing to phase out or exempt
2. How California's four-part fee formula calculates what you owe
3. The PCR credits and bonus/malus incentives layered on top of these targets
4. The compostable packaging deadline most producers are missing.

Neta AI's proprietary AI agent tracks ISR Plan guidance, CAA rulemaking, and exemption filings as they land. Reach out if you want help modeling your 2027 exposure.