What a gas estimate actually is
A gas estimate is a bill your utility company sends when they cannot read your meter in person. Instead of measuring your actual usage, they predict how much gas you used based on your history, the season, and how many days passed since your last reading. The estimate is not a final charge — it is a placeholder that will be corrected when they read the meter for real.
Gas companies estimate for several reasons: a meter may be inaccessible, you may have refused entry, the meter may be broken, or the company may straightforward be behind on readings. Most utilities estimate no more than once or twice a year, though some regions allow more frequent estimates. When the actual reading comes in, your bill adjusts up or down to match what you really used.
The estimate itself is usually printed on your bill with a label like "estimated reading" or "E" next to the meter number. You will also see the estimated usage in therms or cubic feet, and the charge calculated from that number. This matters because an estimate can be significantly higher or lower than your real usage, which means your next bill may swing sharply in the opposite direction.
Key Takeaways
- A gas estimate is a predicted usage amount used when the utility cannot physically read your meter, and it will be corrected when an actual reading occurs.
- Estimates are based on your past usage patterns, seasonal adjustments, and the number of days since the last reading, not on your current behavior.
- You can often provide your own meter reading to replace an estimate, which most utilities accept by phone, online portal, or email.
- An estimate that is far off from your real usage will create a large adjustment on your next bill, so tracking your own readings helps you predict your costs.
- If you believe an estimate is wrong, you can request a meter inspection or ask the utility to investigate before you pay the bill.
How utilities calculate the estimated number
Gas companies use a formula that starts with your usage history — typically the same month from the previous year, or an average of the past 12 months. They then adjust for weather. Winter estimates are usually higher because heating drives consumption; summer estimates are lower. Some utilities also factor in the number of days in the billing period (a 31-day month will show higher usage than a 28-day month, all else equal).
The formula is not transparent on your bill, and it varies by utility. A company in a cold climate may weight winter usage more heavily than one in a mild region. If your household changed — you added a roommate, installed a new appliance, or moved to a different unit — the estimate may be off because it is still based on old patterns. This is why providing your own meter reading is often more accurate than waiting for the utility's estimate.
Some utilities also use degree-day data, a measure of how cold or hot a period was compared to a baseline. If the winter was unusually cold, the estimate goes up; if it was mild, it goes down. This method is more sophisticated than straightforward history-based estimates, but it still cannot account for changes in your household or behavior.
When you can provide your own meter reading
Most gas utilities allow you to submit your own meter reading to replace or verify an estimate. This is usually done through an online portal, a phone line, or email. You will need to locate your meter, read the number on the dial or digital display, and report it to the utility. The reading should be a five- or six-digit number; ignore any red digits or trailing zeros.
Submitting your own reading is free and takes a few minutes. The utility will use your number instead of their estimate, and your bill will reflect your actual usage for that period. If you submit a reading that is lower than the estimate, your bill will drop; if it is higher, your bill will rise. Either way, you avoid the surprise adjustment that comes when the utility finally reads the meter themselves.
Not all utilities make this straightforward. Some require you to call during business hours; others have online portals that are straightforward to use. Check your bill or the utility's website for the method they accept. If you cannot find instructions, call the customer service number on your bill and ask how to report a meter reading. Many utilities also accept readings via text message or a mobile app.
Why estimates can be wrong and what happens next
An estimate misses the mark when your actual usage differs from the pattern the utility expected. A household that used 50 therms last January may use only 30 therms this January if someone moved out, if the weather was milder, or if you improved insulation. Conversely, a new appliance or a colder-than-average winter can push usage well above the estimate.
When the utility finally reads your meter, they will compare the actual number to the estimate they billed you for. If you were overcharged, the next bill includes a credit. If you were undercharged, the next bill includes an additional charge to make up the difference. This adjustment can be large — sometimes hundreds of dollars — which surprises customers who did not realize they were on an estimate.
You can reduce this surprise by tracking your own meter readings each month. Write down the number on the same day each month, calculate the difference from the previous month, and compare it to your bill. Over time, you will see patterns: winter months are higher, summer months are lower, and you will know roughly what to expect. If an estimate looks wildly off compared to your own tracking, contact the utility before paying and ask them to investigate.
How to request a meter inspection if you think the estimate is wrong
If you believe the estimate is significantly inaccurate, you can ask the utility to inspect or test your meter. Most utilities will do this for free if the meter is under warranty (usually five to ten years) or if you suspect a malfunction. You will need to call customer service and explain why you think the reading is wrong — for example, "I have not used heat all month but the estimate is 40 therms higher than last summer."
The utility will schedule a technician to visit and check the meter. They may test it for accuracy, look for leaks in the line, or straightforward read it in person to confirm the current number. If the meter is found to be faulty, the utility may adjust your bill retroactively or replace the meter at no cost. If the meter is working correctly, you will be responsible for any inspection fee, though many utilities waive this if the meter passes.
Do not assume the estimate is wrong just because it is higher than you expected. Gas usage varies with weather and behavior, and estimates are often surprisingly close. But if you have concrete reason to doubt it — you were away for the month, you did not use heat, or the number is double your typical usage — it is worth asking for an inspection.
Estimates versus actual readings: what appears on your bill
Your bill will clearly mark whether the reading is estimated or actual. Look for a label like "E" (estimated), "R" (actual reading), or "M" (meter read). The usage number and the charge are calculated from whichever reading is used. Some utilities also show both the estimated and actual reading side by side so you can see the difference.
If you see an estimate on your bill, the next bill may show an actual reading. When that happens, you will see an adjustment line that corrects the difference. For example, if the estimate was 50 therms but the actual reading shows 35 therms, your next bill will credit you for 15 therms. This adjustment is normal and expected — it is how the utility corrects for the estimate.
Over a year, estimates and actuals should roughly balance out. You may overpay in one month and underpay in another, but the total should be close to what you actually used. If you consistently see large adjustments in one direction, contact the utility and ask whether your meter is being read regularly or whether estimates are being used too often.
How to reduce surprises from estimated bills
The simplest way to avoid surprises is to submit your own meter reading whenever you see an estimate on your bill. This takes five minutes and gives you a bill based on your actual usage, not a prediction. You also build a record of your own readings, which helps you spot patterns and catch errors.
Another step is to contact your utility and ask how often they estimate versus read your meter. Some utilities read every month; others estimate every other month or more. If estimates are frequent in your area, ask whether you can opt into a program where you report your own reading each month. Many utilities offer this, and it eliminates the estimate entirely.
Finally, keep your meter accessible. If the utility cannot reach your meter because it is locked, buried, or blocked, they will estimate. Removing obstacles to meter access means the utility can read it in person, which is always more accurate than an estimate. If your meter is in a difficult location, ask the utility whether they can install a remote-reading device that sends data automatically.
Frequently Asked Questions
Can I refuse to pay a bill based on an estimate?
You can dispute the bill and ask the utility to investigate, but you cannot straightforward refuse to pay. Contact customer service, explain why you think the estimate is wrong, and ask for a meter inspection or a review of your usage history. Pay the bill on time while the dispute is pending; if the utility finds an error in your favor, they will credit your account.
What if I submit my own meter reading and it is wrong?
If you misread the meter, the utility will catch it when they read the meter themselves. Your next bill will include an adjustment to correct the error. To avoid misreading, make sure you are reading the correct dial (ignore red dials), read from left to right, and write down the number exactly as it appears.
Why is my estimate so much higher than last year?
Estimates are based on past usage, so a higher estimate usually means you used more gas in the same month last year, or the weather was colder this year. Check your bill from the same month last year to compare. If usage was similar but the estimate is higher, ask the utility whether they adjusted their formula or whether weather data shows a colder period.
Do I have to let the utility read my meter in person?
Most utilities require access to the meter to read it, and they can estimate if you refuse entry. However, you can arrange a specific time for the reading, ask for advance notice, or request a female technician if that is a concern. Contact customer service to discuss your options; most utilities will work with you to find a time that works.
Will providing my own meter reading change my rate or bill amount?
No. Your meter reading only determines how much gas you used in that period. Your rate — the price per therm — is set by the utility and does not change based on whether you or the utility reads the meter. A lower reading means a lower bill; a higher reading means a higher bill, but the rate stays the same.