On August 5, 2026, the New York State Department of Environmental Conservation (DEC) approved amendments to Part 242 CO2 Budget Trading Program. This makes New York regulations consistent with the RGGI Third Program Review Model Rule but I believe that it was short-sighted because significant changes that occurred since the rule was proposed were ignored. Furthermore, DEC has yet again failed to address the impacts of the rule on New Yorkers which are described in this article.
I have been involved in the RGGI program process since its inception and have been writing about problems with the RGGI program here. I have worked on every cap-and-trade program affecting electric generating facilities in New York including RGGI, the Acid Rain Program, and several Nitrogen Oxide programs, since the inception of those programs. The opinions expressed in this post do not reflect the position of any of my previous employers or any other organization I have been associated with, these comments are mine alone. I acknowledge the use of Perplexity AI to research and organize the material summarized in this article.
Background
RGGI is a market-based program to reduce greenhouse gas emissions (GHG) (Factsheet). It has been a cooperative effort among the states of Connecticut, Delaware, Maine, Maryland, Massachusetts, New Hampshire, New York, Rhode Island, and Vermont to cap and reduce CO2 emissions from the power sector since 2008. New Jersey was in at the beginning, dropped out for years, and re-joined in 2020. Virginia joined in 2021, withdrew in 2024, and rejoined effective July 1, 2026, and Pennsylvania considered joining but has since decided not to join.
RGGI includes a provision for regular reviews. The Third Program Review was completed in July 2025. It strengthened the regional CO₂ emissions cap through 2037, with steeper reductions from 2027 to 2033 and a lower rate thereafter. New York was required to align their regulations with the updated Model Rule by January 1, 2027, and finalized their rules to meet that requirement as mentioned earlier.
New York Benefits of RGGI Claim
RGGI is essentially a cap-and-invest program. On a quarterly basis the RGGI states auction allowances or permits to emit a ton of CO2. Proponents of this strategy tout the investment of the proceeds of the auctions as the primary benefit to consumers. The New York State Energy Research & Development Authority (NYSERDA) designed and implemented a process to develop and annually update an Operating Plan which summarizes and describes the initiatives to be supported by RGGI auction proceeds. I usually comment on the annual updates. For example, this year I commented and summarized the final 2026 Operating Plan.
The press release announcing that the regulations were finalized states:
The adopted RGGI program updates will help ensure New Yorkers continue to enjoy cleaner air while creating jobs and boosting the economy. The amended regulations build upon the progress already achieved by RGGI, including reducing carbon dioxide emissions from New York’s power sector by 50% from 2005 levels and generating more than $3 billion in RGGI auction proceeds that support investments in energy efficiency, renewable energy, and electrification that ultimately provide savings to utility ratepayers
My primary concern is that RGGI is an electric sector emissions reduction program and that state policies do not appreciate that. The press release says that the observed carbon dioxide emissions reductions in New York’s power sector of 50% from 2005 levels are part of “the progress already achieved by RGGI”. In the first place RGGI did not start until 2009 so the observed 24% reduction in emissions between 2005 and 2008 are not due to RGGI. I believe it is more appropriate to compare emissions to three baseline years before RGGI started (Figure 1). This figure shows that there was an emissions peak in 2005, and I calculate that when using the 3-year baseline New York power sector emissions are only down 33%. Furthermore, as shown in Figure 1, the primary reason for the observed reduction is due to fuel switching from coal and oil to natural gas. I believe that the fuel price differential for natural gas use was much greater than the added cost of RGGI allowances in the early years, so the main driver of the observed reductions was economic fuel switching. Also note that the option for fuel switching is not available anymore.
Figure 1: New York State Emissions by Fuel Type

The revisions to DEC RGGI regulations reduce the allowances available but it is not clear where the future reductions will come from. Therefore, I believe that programs that materially decrease electric sector emissions directly or indirectly through energy use reductions should be a priority because affected sources have no other compliance options. I argued in my comments on the Operating Plan amendment that there are programs in the amendment that do not meet these criteria. I think it is only appropriate to fund the non-priority programs if sufficient funding has been allocated to make the emission reductions necessary to meet RGGI compliance mandates.
Affordability
According to the DEC the financial implications of RGGI are positive. DEC and NYSERDA’s press release announcing finalization of these amendments claims that RGGI investments in New York have generated nearly $12 billion in net ratepayer savings over the lifetime of the program’s investments, on roughly $2 billion invested to date – a “nearly 6-to-1” return. In addition, the response to Comment 9 in the DEC Assessment of Public Comments claims that RGGI reduces consumer costs:
The proposed amendments are designed to deliver affordable energy. The RGGI Program has been shown to reduce the electricity bills of New Yorkers through the investments of proceeds raised by the RGGI Program. The updates to the RGGI Program, as outlined in the RGGI bills analysis , are estimated to have no significant impact on utility bills, with a slight decrease compared to status quo even under pessimistic projections of renewable energy deployment.
This section shows that those claims are incorrect.
The claim that there is a “nearly 6-to-1” return on investments is derived from NYSERDA’s June 2026 RGGI funding-status report—but the description simplifies important qualifications. The underlying report does not call the $12.334 billion figure “net ratepayer savings.” It calls it “Energy Bill Savings to Participating Customers.” It is a modeled, expected-lifetime estimate that includes savings attributed to projects still in the pipeline—projects under contract or with applications received but not yet operational. NYSERDA also states that the metrics are estimates and generally have not been adjusted through evaluation, measurement, and verification.
The claimed return also compares lifetime projected participant bill savings with historical funds expended, rather than comparing verified realized savings with the full cost of the RGGI portfolio. The report notes that benefits may be recorded before associated funds are financially reported and that some reported project benefits reflect joint support from other NYSERDA non-RGGI funding sources. Those caveats mean the 5.6-to-1 calculation should not be read as a verified, RGGI-only net benefit to all New York ratepayers.
The “nearly 6-to-1” calculation also compares this projected lifetime benefit stream against $2.188 billion in historical expenditures. That is not an audited return on investment or a demonstration of savings to all New York ratepayers. The report further acknowledges timing differences between benefit reporting and financial reporting, as well as projects supported jointly with other NYSERDA funding sources.
More importantly, NYSERDA’s own recent EmPower evaluation demonstrates why the headline should be treated cautiously. It found evaluated-to-estimated realization rates of only 20% for natural-gas savings and 18% for electric savings. NYSERDA attributes part of the discrepancy to a methodological shift that increased estimated savings; it also reports declining evaluated electric savings over time and identifies cases where repairs increased energy use because previously non-functioning equipment could again be used. These findings do not mean the programs provide no customer benefits, but they do mean that modeled lifetime bill savings should not be marketed as verified “net ratepayer savings.”
In addition to the failed premises of the benefits, the cost estimates are incomplete because they primarily considered just the auction allowance costs. The June 2025 Analysis Group presentation cited to claim that RGGI has “no significant impact on utility bills”. concludes that the RGGI Third Program Review update would have only small effects on average electric bills—generally within about ±1 percent—and that reinvesting auction proceeds could further reduce bill impacts. The analysis compares the proposed RGGI program update with a “status quo” case based on the volume-weighted average allowance price from the twelve most recent auctions. It considers two clean-energy deployment cases and three proceeds-reinvestment scenarios.[
The presentation should not, however, be interpreted as an estimate of the total cost of RGGI to New York electricity customers. It is an incremental comparison between two RGGI policy cases: an updated program and a baseline that already includes RGGI allowance costs. Therefore, its small bill impacts indicate only that the model projects relatively small differences between the update and its chosen RGGI status-quo reference case. Importantly, it does not include the 40% increase in allowance prices noted in June 2026.
Analysis Group states that ICF modeled “wholesale electricity prices and allowance proceeds,” so it would be inaccurate to claim that the study wholly ignores wholesale-price effects that I think that RGGI advocates do not acknowledge. But the brief presentation does not explain how the wholesale-market model handles the critical mechanism by which allowance prices affect consumer costs. It provides no detail on whether generator offers reflect current allowance opportunity costs, which units set marginal prices, or whether the model quantifies the resulting uplift in market-clearing prices paid to all dispatched resources.
That omission is significant in New York’s marginal-price electric market. When an emitting generator is needed to meet load, its RGGI allowance obligation is incorporated into its offer price. If that generator is marginal, the allowance-cost adder can raise the clearing price received by every accepted generator in the affected market interval—not merely reimburse the emitting generator for allowances purchased. Lower-emitting, non-emitting, and even imported resources may receive the higher clearing price despite having little or no corresponding RGGI compliance cost.
The direct cost of allowances and the wholesale market-clearing effect are therefore different things. Earlier this year I showed New York RGGI-unit allowance expenditures in 2025 at roughly $708 million using 32.0 million tons of emissions and an average $22.09 per-ton auction price. But it estimates that applying plausible marginal-unit allowance adders across statewide electricity consumption could add total annual consumer impacts of roughly $1.16 billion to $2.26 billion, depending on the assumed marginal generating-unit characteristics. Those figures are bounding estimates rather than a substitute for a full NYISO hourly production-cost and market-settlement analysis.
Discussion
There is a fundamental affordability issue raised by a colleague who wishes to remain anonymous. He makes a point about the RGGI cost-recycling model that I have not seen made as clearly anywhere else in the record. As he put it:
This is all about time value of money. We take more dollars from the consumer – funnel to government administered programs on a time delay and realize some time delayed energy efficiency gains coupled with limited bill credits for certain customers. The end result is more consumers fall over the cliff into the limited bill credit programs.
Take one dollar today and give you 20 cents back in a year from now with everyone else subject to the poorly administered government programs with high admin fees. The original dollar gets watered down to a low percentage of value.
Conclusion
The approval of the RGGI amendments does not address the reality of emission reduction requirements and affordability. New York CO2 emissions from the electric sector have leveled off and the only way for further reductions is to displace fossil units with zero emissions resources. At a time when Hochul acknowledges the realities of “the COVID-19 pandemic and supply chain interruptions, inflation, the Trump administration’s hostility to wind and solar projects and ongoing trade wars” have made the Climate Act timelines “less possible” it is risky to not prioritize RGGI funding on proven emission reduction programs. If there are insufficient allowances available it will create an artifical energy shortage preceeded by allowance price hikes.
RGGI revenues run through a state-administered efficiency or bill-credit program, and returned as a fraction of its original value months later is not the same as a dollar left in that ratepayer’s pocket today. Discount the delayed, partial, administratively-diminished return to present value and the “6-to-1” return DEC advertises looks a great deal less generous than the headline number suggests. And that is before accounting for the fact, which I have documented in prior posts, that a large share of the embedded RGGI cost in electricity bills – the cost adder created when RGGI-obligated generators bid their allowance costs into the wholesale market – never gets captured by any investment program in the first place. It just flows through to consumer bills as cost, full stop, with no delayed benefit on the other end at all.
I conclude that New York has not acknowledged that RGGI has entered a new phase where reality can no longer be ignored.









































