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How to Budget for Utility Bills That Change Every Month

Three ways to budget for electricity, gas and water bills that rise and fall with the seasons, from 12-month averages to a utility buffer, with worked examples.

By The Kemback team · April 16, 2026 · 6 min read

Rent is easy to budget for: it’s the same every month. Utility bills aren’t. A gas bill might be $30 in July and $210 in January. Electricity can double in a heat wave. If you budget the same amount every month, some months you’ll have money left over and others you’ll come up short, usually at the time of year when other costs are high too.

This post covers three practical ways to handle bills that vary, with worked examples, so the winter heating bill stops being a surprise.

Step 1: Gather a year of bills

The starting point for every method is the same: your actual bills for the last 12 months. You can find them in your online account with each utility, on your bank statements, or in a budgeting app.

Here’s a worked example for a household that heats with gas and cools with electricity:

MonthElectricityGasWaterTotal
January$95$190$45$330
February$90$170$45$305
March$85$120$45$250
April$80$70$50$200
May$95$40$55$190
June$140$30$60$230
July$175$30$65$270
August$170$30$65$265
September$120$35$55$210
October$85$60$50$195
November$90$120$45$255
December$95$175$45$315
Year$1,320$1,070$625$3,015

The monthly total ranges from $190 to $330. Budgeting $250 a month would leave this household short by $80 in January and with money spare in May.

If you’ve just moved and don’t have a year of history, ask the utility for the previous occupant’s average usage at your address; many will share it. Or start with a generous estimate and adjust after a few months.

Method 1: Budget the 12-month average and keep the difference

Divide the yearly total by 12 and budget that amount every month:

$3,015 ÷ 12 = $251.25, so call it $255.

In cheaper months, the unspent money stays set aside rather than being spent elsewhere. In expensive months, you draw on it.

The catch is timing. The savings have to build before the expensive months arrive. Walk through the year:

  • Starting in April, this household sets aside $255 a month. April, May and June cost less than that, leaving $55, $65 and $25 unspent: a surplus of $145.
  • July and August cost a little more, drawing $15 and $10. The surplus dips to $120.
  • September and October add $45 and $60, bringing it to $225. November costs exactly $255, so it holds there.
  • December draws $60, January $75 and February $50. The surplus falls to $40.
  • March adds $5, and the cycle starts again with $45 in hand. The surplus never goes negative.

If you start in the wrong season, say November, you’d be short for the first few months. In that case, either start with a small cushion or use method 2 for the first year.

This method works best with an envelope budget or a separate savings account, because it needs leftover money to stay put. (Rounding up the average gives a little extra margin for a colder winter or a rate increase.)

Method 2: Budget each month at its own expected amount

Instead of averaging, budget each month based on the same month last year: $330 in January, $190 in May, and so on.

This is the most precise method, and it doesn’t require building up a surplus. The downside is that your total budget changes month to month, so you need to plan for the expensive months elsewhere, by spending less on something else or by planning other irregular costs around them.

It suits people who already plan their budget month by month, and households whose income is higher in some seasons.

Method 3: Ask the utility for budget billing

Many utilities offer a “budget billing” or “level pay” plan. They estimate your annual cost and charge the same amount each month, then periodically adjust it and settle up the difference.

Pros:

  • A predictable bill, with no effort on your part.
  • Easy to budget and easy to put on autopay.

Cons:

  • You still pay for what you use. If you use more than estimated, there’s a catch-up charge or a higher monthly amount at review time.
  • It can hide changes in usage, such as a leak or a faulty appliance, because the bill doesn’t move.
  • Not every utility offers it, and the terms vary. Check how often your utility reviews the amount and how it settles any difference.

If you use budget billing, keep an eye on your actual usage on each bill, not just the amount charged.

Adjusting for changes

Last year’s bills are a guide, not a promise. Adjust your figure if:

  • Rates have changed. Check your utility’s notices. If rates went up 8%, raise your budget by about that much.
  • Your household changed. Someone working from home, a new baby, a teenager taking long showers, or a new electric vehicle all affect usage.
  • You made improvements. New insulation, a heat pump or a more efficient appliance should lower usage, though it’s best to wait a season to see by how much.
  • The weather was unusual. If last winter was especially mild, budget a bit higher.

Ways to make bills smaller and steadier

Budgeting handles variation; reducing usage shrinks it:

  • A programmable or smart thermostat to avoid heating or cooling an empty house.
  • Sealing drafts around doors and windows.
  • Ceiling fans in summer, which can let you set the thermostat higher.
  • Fixing leaks quickly. A sudden jump in the water bill is often the first sign.
  • Checking your rate plan. Some utilities offer time-of-use plans that are cheaper if you shift usage to off-peak hours.

Tracking it in a budgeting app

In Kemback, you can see a full year of utility spending in the reports (by category or by payee) to find your average. In envelope mode, leftover money in a utilities envelope can carry forward to cover expensive months. Utility bills can also go on the bill calendar with their usual due dates, and the app notices when a recurring bill goes up.

The short version

Pull 12 months of bills and total them. Either budget the monthly average and keep what’s left in the cheap months, budget each month at last year’s amount, or ask your utility for budget billing. Adjust for rate changes and life changes, and check usage, not just the dollar amount, so a leak or a faulty appliance doesn’t hide inside a “normal” bill.

#utility bills #variable expenses #budgeting

This article is general information, not financial, tax or legal advice. For decisions about your situation, talk to a qualified professional.

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