Build a gas budget without pretending to predict prices in Illinois

Illinois: Budget the exposed components rather than one future rate

Start with EIA: supply, demand, weather and storage price drivers. The table below links this decision to the represented gas companies in Illinois. It does not establish service or supplier availability for every account.

Create a scenario register

Keep monthly usage, index assumptions, location differential, fixed charges and exposed adjustments in separate columns. Name the source and observation date for market data. A supplier’s written formula determines how an observation reaches the bill.

Use a revision trigger

Set an internal review date and identify operational changes that justify a new budget: closure, added shifts, equipment replacement or a corrected baseline. Keep a downside scenario visible without presenting it as a prediction or creating unsupported urgency.

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

Give Utility supply benchmark versus AGS supply and recurring fees, keeping delivery separate its own documented model assumptions. Validate The named delivery company and its eligible small-commercial service class before using a utility comparison component; a forecast for a different class is not this meter’s available alternative.

An assumption register that can be updated without rewriting history

Record each month’s therms, price mechanism, assumed benchmark, location/service adders, recurring fees and retained utility charges. Keep the original budget alongside revisions and actuals. Change one driver at a time to identify sensitivity, then test a combined adverse scenario. For a fixed commodity offer, leave that defined component fixed over its contractual months while varying usage and genuinely exposed items. Do not apply a current spot observation to every future month or label an invented scenario as the forecast available to the customer.

Turn the review into a calculation

Build a monthly weighted budget. 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.