Five practical checks before expecting gas savings in Illinois

Illinois: Find which cost can actually change

Start with EIA: natural gas volume, heat content and energy units. The table below links this decision to the represented gas companies in Illinois. It does not establish service or supplier availability for every account.

Use five separate checks

Check the billed class; reconcile readings and corrections; identify supply versus delivery; count recurring account fees; and update the consumption forecast for operational changes. Keep each proposed action tied to the charge it can affect.

Avoid counting a reduction twice

Model an equipment project at the revised gas volume before comparing supplier offers. A fixed monthly charge remains even when therms fall. Keep equipment investment, supply cost and retained utility costs in separate budget lines.

Illinois utility application

Nicor Gas: the program detail behind this decision

The ICC identifies Nicor Gas, Peoples Gas and North Shore Gas for residential and small-commercial Gas Choice. An Alternative Gas Supplier sells supply while the delivery utility remains. The ICC’s utility list does not establish that every supplier accepts every commercial class or offers a suitable contract. Program Illinois.

Apply the evidence to an account file

For this account, investigate Utility supply benchmark versus AGS supply and recurring fees, keeping delivery separate. If the proposed action changes only the supply component, retain the other components when calculating the total bill effect.

Worked check: price and volume are different effects

Assume purely hypothetical comparable commodity use falls from 10,000 to 9,000 therms while its price rises from $0.80 to $0.85 per therm. Commodity cost changes from $8,000 to $7,650. At the original price, lower volume explains negative $800; the price change on actual use adds $450. The net difference is negative $350. Fixed charges, delivery, taxes and other costs are excluded. It would be incorrect to report that entire $350 as a supplier-price saving.

Turn the review into a calculation

Compare constant supply rates and fees. Enter documented assumptions in matching energy units. Keep any charge outside both supply offers separate; the result does not establish eligibility or an available quote.

Read the Illinois utility guide for the wider service-company distinctions. Convert billed gas units using the bill’s heat-content factor when moving from volume to energy.