How to Read Your Gas Bill and Lower Heating Costs in Minnesota

Your monthly gas bill arrives in January and the number is eye-watering—but what does it actually mean? Most Minnesota homeowners pay their gas bill without understanding what they're actually being charged for, which makes it nearly impossible to reduce costs intelligently. This guide breaks down exactly how to read your CenterPoint Energy (or other Minnesota utility) gas bill, what drives the costs, and the most effective ways to lower them.

Anatomy of a Minnesota Gas Bill

Your natural gas bill has several distinct components. Here's what each one means:

Customer Charge (Fixed Fee)

This is a fixed monthly charge just for having gas service—typically $15–$25/month with CenterPoint Energy. You pay this regardless of how much gas you use. It covers the utility's cost of maintaining your meter, service line, and account. You cannot reduce this charge by using less gas.

Gas Commodity Charge (Variable)

This is the cost of the actual gas you consumed, measured in therms. The rate per therm fluctuates seasonally and year-to-year based on wholesale natural gas markets. In Minnesota, this has ranged from about $0.40 to over $1.50 per therm over the past decade. Your bill will show the rate per therm and total therms used.

Distribution Charge (Variable)

This covers the cost of moving gas through the local pipeline system to your home. It's charged per therm used and is set by the Minnesota Public Utilities Commission through rate cases. Unlike the commodity charge, this doesn't fluctuate with the market—it's a regulated rate.

Taxes and Surcharges

Various state and local taxes, pipeline integrity fees, and other regulatory charges add 5–15% to your total bill. These are largely unavoidable.

What Is a Therm?

A therm is the unit of energy measurement used for natural gas billing. One therm equals approximately 100,000 BTUs of heat energy. Your furnace's efficiency rating (AFUE) determines how many of those BTUs actually heat your home:

• 80% AFUE furnace: 80,000 BTUs of useful heat per therm purchased (20,000 BTUs wasted up the flue)
• 96% AFUE furnace: 96,000 BTUs of useful heat per therm purchased

This is why furnace efficiency matters so much—you're buying fewer therms to get the same amount of heat.

How Many Therms Should You Be Using?

Here are typical annual therm usage ranges for Minnesota homes:

• 1,000–1,500 sq ft home: 700–1,000 therms/year (well-insulated); 900–1,300 (poorly insulated)
• 1,500–2,000 sq ft home: 900–1,300 therms/year (well-insulated); 1,200–1,800 (poorly insulated)
• 2,000–3,000 sq ft home: 1,200–1,800 therms/year (well-insulated); 1,600–2,400 (poorly insulated)

If your usage is significantly above these ranges for your home size, you likely have efficiency issues worth addressing—either furnace efficiency, insulation, or both. See our home insulation and furnace efficiency guide.

Reading Your Usage History

Most Minnesota gas bills include a 12- or 13-month bar chart of your usage. This is one of the most useful tools available to homeowners. Look for:

• Year-over-year comparison: If usage is trending up on similar-temperature months, your furnace may be losing efficiency or you have increased air leakage
• Summer baseline: Your summer gas usage (water heater, range, dryer) represents your non-heating load. Subtract this from winter peaks to isolate heating consumption
• Sharp peaks: If your January usage is dramatically higher than December despite similar temperatures, something changed—a new appliance, a duct leak, or a furnace problem

CenterPoint's Budget Billing Program

CenterPoint Energy offers Budget Billing, which averages your estimated annual gas cost into equal monthly payments. This smooths out the January spike but means you're essentially giving the utility an interest-free loan during summer months. Whether it's worth it depends on your cash flow preferences. At the end of the budget year, you'll receive a reconciliation—a refund if you paid too much, or a bill if you used more than estimated.

The Most Effective Ways to Lower Your Gas Bill

1. Upgrade to a High-Efficiency Furnace (Biggest Single Impact)

Moving from an 80% to 96% AFUE furnace cuts fuel consumption by approximately 16–17%. On a 1,200 therm/year home, that's 190–200 fewer therms annually. At $0.90/therm average cost, that's $170–$180 saved every year—plus you've reduced distribution charges proportionally.

Browse our factory-direct Goodman furnace selection for pricing.

2. Smart Thermostat and Setback Schedules

Lowering your thermostat 7–10°F for 8 hours a day (when sleeping or away) can save 10% annually on heating. A smart thermostat automates this. The savings are real—in Minnesota's climate, 1°F of average thermostat reduction saves roughly 3% on heating costs.

3. Air Sealing and Insulation

Sealing air leaks and adding attic insulation can reduce heating consumption 20–40% in older homes. This is often the highest-ROI improvement available before you even consider a new furnace. See our insulation guide.

4. Regular Furnace Maintenance

A dirty furnace runs less efficiently. Annual tune-ups, regular filter changes, and cleaning the flame sensor and burners keep efficiency close to rated levels throughout the furnace's life. See our maintenance schedule.

5. Humidification

Properly humidified air feels warmer at the same temperature. Setting humidity at 35% instead of 20% allows you to run the thermostat 2–3°F lower with the same perceived comfort—saving 5–8% on heating. See our humidifier guide.

6. CenterPoint Rebates and Rate Programs

CenterPoint offers rebates for efficiency upgrades and has time-of-use rate programs worth evaluating. Check their website or see our Minnesota rebates guide for current programs.

The Bottom Line

Your gas bill is a scoreboard. Understanding what's on it lets you make smarter decisions about where to spend money to improve. For most Minnesota homeowners with older furnaces, the combination of a high-efficiency furnace replacement and basic air sealing will cut the heating portion of your gas bill by 25–40%—often paying back the investment in 5–8 years through energy savings alone.