Billings, MT Central AC Replacement Cost, by SEER (2027)
Adjust your home size & electric cost in Billings, MT
$7,690 to $9,270: that is the installed range for a 14 SEER system in Billings, the rating that wins on ten-year cost here. The load behind it is a 2,200 sq. ft. home needing roughly 42,000 BTU, or 3.5 tons. Expect Billings bids to land roughly 1% above the Montana average; the city has about 120,000 residents and the costs that come with that.
Expect the quote to list the condenser, coil, line set, pad, disconnect and thermostat. Leaky or undersized ducts, an old electrical panel and the permit are the usual extras.
Four Ratings, Four Prices: Billings
Each step up in efficiency costs more in Billings. The entry 14 SEER system is $7,690 to $9,270; 16 SEER is $9,700 to $11,690; 18 SEER is $15,690 to $18,910; 20 SEER is $21,130 to $25,470.
Billings Next to the Montana Average, by SEER
| System (3.5 ton) | Billings | Montana average | Materials |
|---|---|---|---|
| 14 SEER | $7,690 - $9,270 | $7,580 - $9,140 | $4,830 |
| 16 SEER | $9,700 - $11,690 | $9,560 - $11,530 | $6,020 |
| 18 SEER | $15,690 - $18,910 | $15,460 - $18,640 | $9,590 |
| 20 SEER | $21,130 - $25,470 | $20,820 - $25,100 | $12,840 |
Split a Billings quote into parts and labor and the equipment side is about $4,830 for 14 SEER, $6,020 for 16 SEER.
Local Labor and the Billings Price
Wages, insurance, fuel and shop rent all differ from one market to the next, and installers build those costs into every bid. In numbers: a 16 SEER install that averages $9,560 to $11,530 across Montana comes to $9,700 to $11,690 in Billings, about 1% more.
We apply these figures across Billings's 14 ZIP codes (Yellowstone County), downtown and edge alike. Collect three written bids for the same model, the same SEER and the same scope, then compare line by line instead of by the bottom number.
Ten Summers of Cooling Bills in Billings
Every cooling cost below starts from $0.177 per kWh, the Montana average and about 19% below the national average of $0.217. Because Montana rates grew about 2.18% a year over the last decade, each SEER point saves a little more every summer.
Point at a year (or tap it on a phone) for the season cost of every rating. The lines climb 2.18% a year, matching how MT electric rates moved over the last decade.
2026 = this season at MT's current rate. Each later year compounds the historic 2.18%/yr rise; costs rounded up to $10.
Season by season, 16 SEER uses about 2,802 kWh in Billings, near $500; a 9 SEER unit would run up about $880.
Upgrade Payback Finder: Your Old AC vs a New One
Choose your current AC and a replacement rating. Every result assumes a 3.5-ton system and Montana electric rates ($0.177/kWh today, up 2.18% a year).
| Installed price of the new system | $8,360 |
| Electricity saved, first year | $320 |
| Saved over 10 summers (rates rising) | $3,510 |
| Payback | 21.0 years |
| Net after 10 summers | -$4,850 |
Savings alone fall short: 9 to 14 SEER is still $4,850 behind after 10 summers in MT.
If the old unit still works, the full install price is the cost of the upgrade. If it has to be replaced anyway, compare the extra price over a 14 SEER bid with the extra savings.
Billings: What Each Upgrade From 9 SEER Returns
| 9 SEER | 14 SEER | 16 SEER | 18 SEER | 20 SEER | |
|---|---|---|---|---|---|
| Installation Cost | - | $8,360 | $10,540 | $17,050 | $22,960 |
| Electric Usage / Yr | 4,959 kWh | 3,161 kWh | 2,802 kWh | 2,522 kWh | 2,299 kWh |
| Electric Cost / Yr | $880 | $560 | $500 | $450 | $410 |
| Energy Savings / Yr | - | $320 | $390 | $440 | $470 |
| Payback (Rates Rising) | - | 21.0 years | 21.9 years | 28.9 years | 33.6 years |
| 10-Year Net (Rates Rising) | - | -$4,850 | -$6,340 | -$12,300 | -$17,780 |
Coming from 9 SEER, a 14 SEER replacement earns back its price in roughly 21.0 years of lower Billings bills, with rate increases included.
Buy Price vs Ten Years of Power in Billings
Buy Price vs 10-Year Running Cost: Total Cost of Ownership in MT
Install price plus ten seasons of electricity at Montana rates, growing 2.18% yearly, gives the real price of each system. Compare the total bars: the shortest one wins. Hover or tap for the breakdown.
Cheapest over 10 years in Montana: 14 SEER at $14,520 all-in, made of $8,360 to install plus $6,170 to run.
Energy inflation is built in: season one is priced at today's MT rate, and each of the nine seasons after it costs 2.18% more than the one before, the historic yearly increase. The install figure is the typical installed price on this page. Parts and totals are each rounded up to $10, so the parts may sum $10 above the total.
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Weather, Sizing and the Billings AC
Billings lies near 45.8° N. Our model places Montana in climate region 1, where summer days average around 83°F and winter afternoons about 31°F statewide. Cold months dominate the Billings calendar; air conditioning matters mainly in the warm stretches of summer.
Climate zones run from 1 (cool) to 5 (hot); Montana is in Zone 1.
Low humidity lets many Billings households keep the thermostat a little higher and still feel comfortable, which trims the bill.
The closest city in this guide is Bozeman, about 120 miles to the west; it has its own price page.
Shopping for a heat pump in Billings? Ask for a model rated for cold-climate output and for the installer's plan for backup heat. Treat 42,000 BTU as the starting estimate. Insulation, window area, shade and air leaks can move the right size either way, which is what a Manual J load calculation measures.
Before the Quote: Your Billings House
Many Billings homes have forced-air heat with ducts a new system can share; some older or smaller homes use wall or baseboard heaters instead. Installers in Billings can usually reach the outdoor pad and the indoor equipment easily, so labor tracks the system itself.
Ton for ton, a mini-split is pricier than central air. It needs no ducts, though, and each head conditions only its own room, so get a ductless quote for any Billings home without ductwork.
Timing, Permits and Paperwork in Billings
The gap between heating season and the first hot week is short in Billings; booking early in spring gives you the best choice of dates. Most jurisdictions want a permit and inspection for an HVAC replacement; ask whether your contractor pulls it and whether the fee is in the price.
Prices Around Montana
Elsewhere in Montana, the same 16 SEER job costs:
- Missoula, MT, 270 mi west: $9,640 to $11,620
- Great Falls, MT, 180 mi northwest: $9,610 to $11,580
- Bozeman, MT, 120 mi west: $9,600 to $11,570
Nearby places such as Huntley, Laurel, Acton, Shepherd and Molt can use the Billings figures as a starting point.
For the statewide view, including efficiency comparisons and ten-year totals, read the Montana HVAC cost guide. For an estimate built on your home, try the AC size calculator, then the heat pump calculator.
Figures are planning estimates. Your price depends on the house, the equipment, the ducts and the contractor; get a Manual J load calculation before you buy.
Quick Answers
Figures below use Montana averages; energy prices as of October 2026.
Does a heat pump heat for less than natural gas in Montana?
Not in Montana at today's prices. Natural gas delivers 97,881 BTUs per dollar and a COP-3 heat pump 57,997. Power would need to fall under about 10.5¢ per kWh for the heat pump to win (the Montana average is 17.7¢), or the unit would need a higher COP.
Is electricity in Montana expensive compared with other states?
At 17.7¢ per kWh, Montana runs 19% under the national figure of 21.7¢, the 16th cheapest among the 50 states and DC. Every AC and heat pump cost on this page moves with that rate.
Is a cold-climate heat pump needed in Montana?
Yes, plan on one. Winter lows in Montana average about 11°F statewide, where a standard heat pump loses much of its output. Cold-climate models keep heating below zero; size for the coldest nights.
What does a heat pump save over electric baseboard in Montana?
About two-thirds. At 17.7¢ per kWh (the Montana average), a million BTU of heat costs about $51.73 from baseboards and about $17.24 from a heat pump running at COP 3.
What is the best season to replace an AC or furnace in Montana?
The shoulder seasons, spring and fall, ahead of need. Winter lows near 11°F statewide mean heating work should wrap up by early fall. Crews are busiest in the first hot week and the first freeze, and a forced emergency swap leaves no time to compare bids.
Is it smart to replace the furnace and AC together?
When both are aging, generally yes: one visit, one labor charge, and a matched coil and condenser, which the efficiency rating assumes. If one is fairly new, price each job on its own.
Check it for your own home: Central AC cost estimator or Heat pump cost calculator.
More HVAC Cost Guides
Montana HVAC costs (statewide) · HVAC costs in every state
