Why this bill changed

INV-2026-02-C00418 · Ada Nwosu · Jan 2026

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Your January bill is $45.70 higher than your December bill.

Most of the difference is gas used beyond what the weather explains. You used 204 therms this period against 112 in December.

Dec 2025$93.02
Weather+$4.89
Usage beyond weather+$47.68
Gas cost−$7.28
Weather adjustment−$0.92
Taxes and fees+$1.33
Jan 2026$138.72

Charges and taxes for the period; any previous balance is not part of the change.

What to say

A talk track — the caller sees the same explanation in the portal

“Your January bill is $45.70 higher than your December bill. Most of the difference is gas used beyond what the weather explains.”
“It was 9% colder than last month, and gas heating follows the cold — your usage line tracks the weather line on the chart.”
“Even allowing for the cold, you used about 84 therms more than usual. Has anything changed — thermostat, a new appliance, guests? We can send someone to do a free safety check.”
“If this bill is hard right now, budget billing would make it about $56.00 every month, or we can spread this one out.”

Each cause, in words

5Largest first — what the customer reads in the portalExpand

+$47.68
Usage beyond the weather
Even allowing for the cold, you used about 84 therms more than your home usually does. Common causes: a higher thermostat, a new gas appliance, guests, or a leak. If you ever smell gas, leave and call (979) 555-0199 from outside.
−$7.28
Natural gas cost
The purchased gas adjustment — what we pay for the gas itself, passed through at no markup — fell from $0.4120 to $0.3764 a therm.
+$4.89
Colder weather
This period had 529 heating degree days against 486 — 9% colder. At the same gas per degree of cold, that alone is about 9 therms more.
+$1.33
Taxes and fees
The city franchise fee and taxes are a percentage of the charges above, so they move with them.
−$0.92
Weather adjustment
The weather adjustment credit went from $0.0142 to $0.0187 a therm. It evens out the delivery part of your bill when weather strays from normal (505 degree days is normal for this period), softening bills in extreme winters.

What to offer

Budget billing
About $56.00 a month, from the last twelve bills, settled once a year.
Letter
Payment arrangement
Spread this bill over the next few without collection activity.
Letter
Free safety checkSuggested
84 therms beyond the weather. Usually a thermostat or appliance; occasionally a leak.
Letter
Energy assistance referral
Local agencies; a pledge pauses collections while it is processed.
Letter

Emergency line for anything that smells like gas: (979) 555-0199.

Usage and weather

12 bill periods · zone heating degree days

Jan 2026 Dec 2025 Therms billed Heating degree days

Show the math

Therms, degree days and every rate, both bills — one change at a timeExpand

	Dec 2025	Jan 2026
Therms billed	112.18	204.34
… the weather alone predicts		120.74
Heating degree days	486	529
Normal degree days	455	505
Base load (summer)	15.4 th
Gas cost (PGA) / th	$0.41200	$0.37640
Weather adjustment / th	−$0.01420	−$0.01870
Customer charge	$22.50	$22.50
Distribution, first 50 th	$0.18240	$0.18240
Distribution, beyond	$0.14190	$0.14190
GRIP rider / th	$0.03070	$0.03070
Charges and taxes	$93.02	$138.72

Starting from the Dec 2025 bill, the engine re-prices it at the volume the weather predicts, then at the volume used, then swaps in this period’s gas cost, weather adjustment, and each base rate in turn. Every step is priced line by line and rounded the way the biller writes lines, so the steps add to the real difference — +$45.70 — to the cent. It reproduces every issued bill in the system exactly.