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How Much Does It Cost to Run a Ductless Mini-Split? $96/Month

Running a ductless mini-split at 2,000 watts for 9.4 hours a day costs about $3.20 a day and $95.88 a month at 17¢/kWh, the EIA 2025 annual US average (July 2026 monthly: 18.31¢) — roughly $479 a year.

2,000 W (400–3,500 W)Typical power draw
9.4 h/day, 30 days/monthAssumed use
18.80 kWhEnergy per day

· Source: EIA Electric Power Monthly Table 5.6.A (July 2026 data) · next EIA update ~Oct 23

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a ductless mini-split: energy cost only (2,000 W ÷ 1,000 × hours × rate); fixed fees and taxes extra.
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## How much does it cost to run a ductless mini-split?

The same a ductless mini-split at 9.4 hours a day costs $67.68 a month at 12¢ and $253.80 at 45¢ — usage held constant, only the rate moving:

Table 1: How Much Does It Cost to Run a Ductless Mini-Split? $96/Month
Electricity rate Per hour Per day Per month in season Per year
12¢/kWh $0.240 $2.26 $67.68 $338
15¢/kWh $0.300 $2.82 $84.60 $423
17¢/kWh (US avg) $0.340 $3.20 $95.88 $479
20¢/kWh $0.400 $3.76 $112.80 $564
25¢/kWh $0.500 $4.70 $141.00 $705
30¢/kWh $0.600 $5.64 $169.20 $846
35¢/kWh $0.700 $6.58 $197.40 $987
45¢/kWh $0.900 $8.46 $253.80 $1,269
Typical power draw
2,000 W (400–3,500 W)
Assumed use
9.4 h/day, 30 days/month
Energy per day
18.80 kWh
Cost per day
$3.20
Cost per month
$95.88
Cost per year
$479

Why this number

Running a ductless mini-split at 2,000 watts for 9.4 hours a day costs about $3.20 a day and $95.88 a month at 17¢/kWh, the EIA 2025 annual US average (July 2026 monthly: 18.31¢) — roughly $479 a year. The formula for a ductless mini-split: 2,000 W ÷ 1,000 × hours × your rate per kWh. For a ductless mini-split your own rate changes the answer: at 12¢/kWh that month costs $67.68, at 45¢/kWh it costs $253.80.

A ductless mini-split rated at 2,000 watts, run 9.4 hours a day, costs about $3.20 a day — about $95.88 a month, or $479 a year — at the US average electricity rate of 17¢/kWh. That places it 5th of the 40 appliances tracked here — in the top quarter, well above the typical household load, so how much you run it genuinely shows on the bill.

What actually drives this number

The inverter compressor in a mini-split modulates instead of cycling, so it spends most of a winter running slowly rather than switching hard on and off. That is why the hours here are long and the watts moderate — it is the opposite duty cycle to a furnace. The figure below covers heating only: EIA’s 2020 data puts homes heated entirely by mini-splits at about 2,800 kWh a season, and the same heads add roughly another 1,600 kWh cooling those homes in summer. Where the money actually comes back is zoning. Each head is its own thermostat, so you can leave the spare bedroom at 55°F all winter, which is the one thing a ducted system physically cannot do.

Unlike resistance loads, efficiency here is genuinely shoppable — the SEER2 rating on the nameplate sets the input watts directly, and it is a large part of why real units span 400–3,500 W. The same refrigeration cycle also runs in reverse: the heat pump , at about $104.78 an in-season month, is what that trick looks like applied to heating.

Where this number comes from

Putting Ductless mini-split in proportion

At 17¢/kWh, a ductless mini-split next to the rest of the bill:

For a ductless mini-split: cooling equipment moves heat rather than making it, so it delivers several units of cooling per unit of electricity. That efficiency is why it beats resistance heating for the same effect, and long run-hours are why it still lands high on the bill. On this site’s own numbers, a ductless mini-split lands at #5 of 40 on the monthly-cost ranking, at about $95.88 for a typical month.

The formula, in full

The 2,000 W arithmetic for a ductless mini-split, step by step:

  1. Watts to kilowatts. 2,000 W ÷ 1,000 = 2.00 kW.
  2. Energy per day. 2.00 kW × 9.4 hours = 18.80 kWh.
  3. Cost per day. 18.80 kWh × $0.17 = $3.20.
  4. Cost per month. $3.20 × 30 days = $95.88.

For a ductless mini-split the two levers are run-hours (9.4 h/day here) and your rate; at 9.4 hours a day, 2,000 W adds up — which is why cooling equipment dominate the rankings.

Ductless mini-split running cost by state

Hours and rate both change with geography: the state pages scale the 9.4 h/day baseline by each state’s degree-days and price it at the state’s own EIA rate and its largest utilities’ prices. Cold states so far: Alaska , Colorado , Connecticut , Idaho , Illinois , Iowa , Maine , Massachusetts , Michigan , Minnesota , Montana , Nebraska , New Hampshire , New York , North Dakota , South Dakota , Utah , Vermont , Wisconsin , Wyoming .

Other cooling loads: Heat pump ($524/yr), Central air conditioner ($339/yr), Portable air conditioner ($233/yr). Closest on annual cost: Electric water heater ($475/yr), Hot tub ($512/yr). Across all other cooling loads here, the cheapest is Ceiling fan at $1.84/mo.

The a ductless mini-split table above runs a fixed rate ladder (12–45¢); the state quick-fill uses July 2026 averages from EIA Electric Power Monthly, Table 5.6.A .

Put a ductless mini-split ($95.88 a month) against everything else in the electricity cost calculator , check your state’s rate , or browse all 40 appliances ; year-round high bills: solar savings calculator .

Frequently asked questions

Is a mini split cheaper to run than central air?

Yes on these assumptions — about $95.88 a month for a 2,000 W mini-split at 9.4 effective hours against $67.83 for a 3,500 W central system at 3.8 hours, both at 17¢/kWh; the verdict flips if the mini-split cools one room while central air covers the whole house.

How much does it cost to run a ductless mini-split per hour?

About $0.340 an hour for a ductless mini-split at 17¢/kWh, the EIA 2025 annual US average (July 2026 monthly: 18.31¢), for a 2,000 W unit. The calculation is 2,000 ÷ 1,000 × 1 hour × $0.17 per kWh. At 30¢/kWh the same hour costs $0.600.

How much does a ductless mini-split add to my monthly bill?

Roughly $95.88 a month for a ductless mini-split at 9.4 hours a day, 30 days a month, 17¢/kWh. That is about $479 a year across a 5-month season. For a ductless mini-split, change the 9.4-hour default to your own use — run-time moves the total as much as the 2,000 W does.

How many watts does a ductless mini-split use?

Typically around 2,000 W, with real units ranging from about 400 to 3,500 W depending on size, model and setting. The nameplate on your own unit is the figure to trust — these are typical values for planning, not a measurement of your appliance.

Why is my actual bill higher than the a ductless mini-split figure?

$95.88 a month is the energy cost of a ductless mini-split alone; your bill adds fixed connection charges, delivery fees, taxes and every other load. Add the other appliances in the index to a ductless mini-split for the controllable part of the bill.

How we calculated this

Worked for a ductless mini-split: 2,000 W ÷ 1,000 × 9.4 h × $0.17 = $3.20 a day; × 30 days = $95.88 a month; × 5 months in use = $479 a year. 2,000 W and 9.4 h are the typical figures cited for a ductless mini-split; 17¢ is EIA’s 2025 annual US average.

Sources: U.S. Energy Information Administration (EIA) electricity rates · DSIRE incentive records · public IRS/OBBBA guidance. Figures are modeled estimates, not quotes or tax advice. See our methodology.

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