The RNG Surcharge Lands Hardest on the Poorest Households

A household on a fixed income in a drafty rental does not get to choose how it heats the house. The furnace burns gas because the building came with a gas furnace, and replacing it is the landlord's decision, not the tenant's. In a cold winter, that household can spend a tenth or more of its income just keeping the rooms above freezing. When a renewable natural gas premium gets added to the gas rate, that household pays it on every therm, the same rate as the family three towns over with a new heat pump and an income five times larger.

This is the part of the renewable natural gas debate that the rate filings tend to skip. The argument over RNG usually stops at whether ratepayers should fund it at all. The harder question is which ratepayers feel it first. The answer, by the design of the charge, is the ones who can least afford to.

What Energy Burden Actually Means

Energy burden is the share of household income that goes to energy bills. It is one of the more revealing numbers in housing economics because it does not move with the size of the bill alone. It moves with the size of the bill relative to what a family earns.

The American Council for an Energy-Efficient Economy, in its analysis of household energy data, found that low-income households carry a median energy burden several times higher than higher-income households. A family at or below twice the federal poverty line commonly spends in the high single digits as a percentage of income on energy, while the typical household spends closer to three percent. For the most cost-burdened homes, the share runs into the teens.

That gap exists before any clean-energy surcharge is added. It reflects older housing, less insulation, less efficient appliances, and lower incomes. A premium charged on each unit of gas does not narrow that gap. It widens it, because it is layered on top of a bill that already consumes a disproportionate slice of a low-income budget.

A Flat Premium Is a Regressive One

Renewable natural gas costs far more to produce than conventional gas. Production estimates commonly run from fifteen to forty dollars per million British thermal units, against two to four dollars for the conventional supply it replaces. When a utility buys RNG under a state program or mandate, it recovers that premium through rates, and rates are charged by the unit of gas consumed.

That structure is the definition of a regressive charge. Everyone pays the same adder per therm, so the dollars scale with consumption, not with ability to pay. A larger or older home in a cold climate burns more gas and therefore pays more in absolute dollars. But as a share of income, the heaviest weight falls on the households with the least room in their budgets, because heat is not a luxury they can trim.

The family with capital can escape the charge entirely. They can install a heat pump, tighten the building envelope, and walk away from the gas system that carries the premium. The renter and the fixed-income owner cannot. They are locked into the appliance they have, paying a surcharge designed to fund someone else's idea of climate progress.

Heat Is Not a Program You Can Decline

Utilities sometimes defend RNG procurement by pointing to customer support for clean energy. But residential heating is not a discretionary purchase, and a procurement mandate is not a voluntary program. When the cost of RNG is folded into base rates, there is no opt-out box on the bill. The premium applies to the customer who enrolled enthusiastically and the customer who never heard the acronym, in equal measure per unit.

This is different from a green-power option a customer chooses to buy. It is a cost socialized across the entire residential class, including the households that assistance programs exist to protect. Low-income energy assistance, the federal program that helps families pay winter heating bills, reaches only a fraction of the households eligible for it. Raising the underlying cost of gas through an RNG premium increases the size of the bill that assistance is supposed to cover, while the assistance itself does not grow to match. The shortfall lands on the family.

The Charge Is Hidden and Untargeted

Two features make the burden worse. The first is that the premium is rarely itemized. A residential gas bill does not break out the RNG procurement cost as its own line, so the household paying the most as a share of income cannot even see what it is paying for. The charge is real, recurring, and invisible.

The second is that it is untargeted. A well-designed cost-recovery mechanism could shield the most burdened ratepayers, through tiered rates, income-based discounts, or a direct credit. Most RNG cost recovery does none of this. It spreads the premium evenly across the residential class and lets the regressive math run. The result is a clean-air policy that asks the lowest-income homes to subsidize the most expensive form of methane reduction available.

Fund the Cheaper Result, Protect the Bill

There is a fairness test that any ratepayer-funded methane program should have to pass. If the goal is to keep methane out of the air, the program should buy that result at the lowest cost per ton and protect the households least able to pay for it. RNG procurement, charged at a flat premium with no income screen, fails both halves of that test at once.

The alternative is not complicated. Methane destruction on the farm, through on-site combustion, costs a fraction of the pipeline-grade RNG pathway per ton of methane eliminated, and it does not require a residential surcharge to fund. A modest, transparent destruction credit drawn from a climate budget keeps the cost off the gas bill entirely. Where a surcharge is unavoidable, it should be itemized so people can see it, and it should be structured to spare the households already spending a tenth of their income on heat.

Clean air is a public good worth paying for. The question is who pays, and in what proportion. A policy that lands hardest on the poorest furnace in the coldest house has the proportion exactly backward.