AC Replacement Cost in 2026: What to Expect

Most homeowners pay $5,000 to $12,000 to replace a central AC, with an average of about $6,000 (Fixr). Fixr bases that average on a 3-ton system for a typical home. System size, efficiency rating, ductwork, permits and local labor rates decide where your quote lands.

As of 2026, the figures below are national ranges from published cost guides, not quotes. They're here to help you read a quote and know which questions to ask.

How much does a new AC cost?

Fixr puts the national range at $5,000 to $12,000 for a new AC system, with an average around $6,000 (Fixr). That covers equipment and installation labor for a central system.

A separate Fixr article says a new central AC unit, including installation, typically ranges from $3,000 to $7,500 (Fixr). The gap between the two shows how much the details matter. A straight swap of a small outdoor unit costs far less than a larger, high-efficiency system with new refrigerant lines and duct work.

If you're replacing the furnace at the same time, that same article says a full system replacement can cost $5,000 to $12,500 (Fixr).

What does each type of AC cost to install?

The type of system is the biggest single factor. Fixr lists these installed ranges (Fixr):

• Portable AC: $100 to $500 (Fixr)
• Window AC: $150 to $800 (Fixr)
• Swamp cooler: $1,000 to $4,000 (Fixr)
• Ductless mini-split: $1,000 to $14,500 or more, depending on how many indoor units you need (Fixr)
• Air-source heat pump: $4,000 to $11,000 (Fixr)
• Central air conditioning: $5,000 to $12,000 (Fixr)
• Geothermal: $11,000 to $38,000 (Fixr)

Most homes with existing ducts and a furnace replace a central AC with another central AC. A heat pump is worth pricing too, because it heats as well as cools. See heat pump repair and replacement costs for that comparison.

How does size change the price?

AC size is measured in tons. One ton equals 12,000 BTUs per hour of cooling (Fixr). Bigger homes and hotter climates usually need more tons, and bigger systems cost more. Fixr lists these average installed costs by size (Fixr):

• 1.5 tons: $1,800 to $7,000 (Fixr)
• 2 tons: $2,000 to $7,600 (Fixr)
• 3 tons: $2,500 to $8,000 (Fixr)
• 4 tons: $3,100 to $8,700 (Fixr)
• 5 tons: $3,300 to $9,300 (Fixr)

Why sizing matters more than the price tag

Bigger isn't better. Fixr explains that an undersized system struggles to keep up and wears out sooner, while an oversized one cycles on and off rapidly, which can damage the compressor and cool the home unevenly (Fixr). ENERGY STAR adds that oversized equipment may cycle too often, giving you less comfort and a shorter lifespan (ENERGY STAR).

The right way to size a system is a load calculation, often called a Manual J. It looks at your home's square footage, insulation, windows, ceiling height, sun exposure and climate. ENERGY STAR says your contractor should use your home's actual characteristics, not just a rule of thumb (ENERGY STAR).

Fixr notes some contractors charge for a Manual J calculation but often waive the fee if you go ahead with their estimate (Fixr).

A quick tip: if a company quotes you the same size as your old unit without measuring anything, ask why. Your old system may have been the wrong size, or your home may have changed since, with new windows, insulation or an addition.

What do efficiency ratings mean, and what do they cost?

Central AC efficiency is rated in SEER2, short for seasonal energy efficiency ratio. A higher number means less electricity for the same cooling. SEER2 replaced the older SEER rating in 2023, with a test that better reflects real-world conditions (Trane).

The federal minimums

Since January 1, 2023, the U.S. Department of Energy has set regional minimums for new central air conditioners. Trane summarizes them this way (Trane):

• North: split-system air conditioners must reach at least 13.4 SEER2, which Trane says is equal to 14 SEER.
• Southeast: split systems under 45,000 BTUs must reach 14.3 SEER2. Larger ones must reach 13.8 SEER2.
• Southwest: the same SEER2 minimums as the Southeast, plus a separate EER2 requirement for performance in high heat.
• Split heat pumps, all regions: at least 14.3 SEER2 and 7.5 HSPF2.

In the South and Southwest, Trane says split air conditioners that don't meet the 2023 standards can't be installed on or after January 1, 2023 (Trane). That's one reason an older unit can't simply be swapped for an identical one.

Is higher efficiency worth paying for?

Higher-efficiency systems cost more upfront but can cut energy bills over time, especially in hot climates (Fixr). ENERGY STAR says certified units installed correctly can save up to 20 percent on heating and cooling costs (ENERGY STAR).

Whether that pays off depends on how much you run your AC. In a long, hot cooling season, a higher SEER2 rating earns its cost back faster. In a mild climate, the minimum-efficiency model may be the better value. Ask the company to show you the expected savings for each option they quote. ENERGY STAR says contractors should be able to show you savings calculations for ENERGY STAR equipment (ENERGY STAR).

When should you replace your AC?

ENERGY STAR suggests considering replacement when a heat pump or air conditioner is more than 10 years old (ENERGY STAR). It also lists these signs:

• Frequent repairs and rising energy bills. The equipment may have become less efficient.
• Some rooms too hot or too cold. Equipment, ducts or insulation may be the cause.
• Humidity problems. Poor equipment operation or leaky ducts can leave the air too humid in summer.
• A noisy system. ENERGY STAR says this can point to an undersized duct system or a problem with the indoor coil.

The EPA also recommends having your equipment evaluated by a professional HVAC contractor if it's more than 10 years old or not keeping your house comfortable (EPA).

How long should an AC last? Fixr says central AC systems average 15 to 20 years (Fixr), though another Fixr guide puts most units at 10 to 15 years (Fixr). Climate and maintenance make a big difference. A system that runs hard all year in a hot climate usually wears out sooner.

Repair or replace?

Two rules of thumb help:

• The 50 percent rule. Fixr says that if a repair will cost more than 50% of a new system, replacement is probably the better long-term option (Fixr).
• The age-times-cost rule. Multiply the repair estimate by the system's age in years. If the result is higher than $5,000, Fixr says replacement probably makes more financial sense (Fixr).

For a full list of repair costs to compare against, see AC repair costs. If the problem is a refrigerant leak on an older system, refrigerant leak repair costs explains why that often tips the decision toward replacement.

Should you replace just the outdoor unit or the whole system?

A central AC has two halves: the outdoor condenser and an indoor coil that sits on your furnace or inside an air handler. It can be tempting to replace only the half that failed. It usually works better to replace them as a matched set.

Here's why. The efficiency rating of a split system applies to the matched pair. An old indoor coil paired with a new outdoor unit may not deliver the rated efficiency, and a mismatch can shorten the new unit's life. Trane notes that a matched system runs more efficiently (Trane).

Refrigerant matters here too. Indoor and outdoor parts are designed for a specific refrigerant. The EPA says there are no drop-in replacements for R-22 and that alternative refrigerants won't work well without changes to system components (EPA). If you have an older R-22 system, plan on replacing both halves.

What about the furnace? If your furnace is about the same age as your AC, Trane suggests replacing both at the same time (Trane). Fixr says a full AC and furnace replacement can cost $5,000 to $12,500 (Fixr). Doing both at once can save a second round of labor and makes sure the blower is a good match for the new coil. For what heating repairs run in the meantime, see furnace repair costs.

Should you consider a heat pump instead?

If you're replacing your AC, a heat pump is worth a quote. A heat pump is an air conditioner that can also run in reverse to heat your home. ENERGY STAR says an air-source heat pump can deliver up to three times more heat energy to a home than the electrical energy it uses (ENERGY STAR).

Fixr lists air-source heat pump installation at $4,000 to $11,000 on its AC installation guide (Fixr). Its heat pump guide gives a national average of $8,350 (Fixr).

A heat pump makes the most sense when your furnace is also aging, when you heat with electric resistance or propane, or when winters are mild. In very cold areas, ask about cold-climate models or a dual-fuel setup that keeps a furnace for the coldest days. ENERGY STAR notes that many newer certified heat pumps are designed to heat well even in cold climates (ENERGY STAR).

What should a replacement quote include?

A good quote is specific. ENERGY STAR advises getting written, itemized estimates and a signed proposal that lists project costs, model numbers, the job schedule and warranty information (ENERGY STAR). Here's what to look for.

The equipment

• Brand and model numbers for the outdoor unit and the indoor coil or air handler. Matching indoor and outdoor parts matters for efficiency.
• Size in tons, and how they arrived at it.
• SEER2 rating for the matched system, not just the outdoor unit.
• Refrigerant type. Most new systems use newer, lower-impact refrigerants. More on that below.

Labor and installation

Fixr says labor to install a standard central AC typically runs $500 to $2,500, or $75 to $250 per hour (Fixr). Labor usually covers setting the unit, wiring, running refrigerant lines and testing.

Check whether these are included or extra:

• Removing and hauling away the old unit. Fixr says some companies include it and many don't (Fixr).
• New refrigerant lines, or reuse of existing ones.
• A new pad or mounting for the outdoor unit.
• Electrical work, such as a new disconnect or wiring.
• A new thermostat.
• Testing the refrigerant charge and airflow. ENERGY STAR says the contractor should test and adjust the refrigerant charge and make sure airflow meets the manufacturer's specifications (ENERGY STAR).

Ductwork

If you have ducts, they should be checked. ENERGY STAR suggests asking your contractor to inspect the ducts, run a leakage test and make needed repairs (ENERGY STAR). In a typical house, about 20 to 30 percent of the air moving through ducts is lost to leaks and poor connections (ENERGY STAR).

If you need new ductwork, Fixr says to expect to add $1,400 to $6,000 (Fixr).

Permits

Most local governments require a permit to replace an AC. Fixr says permit fees range from $50 to $1,500, depending on the system and your building department's fees (Fixr). The installing company usually pulls the permit. Make sure the quote says so.

Warranty

Most manufacturers offer a parts warranty and a separate compressor warranty. Some installers add a labor warranty (Fixr). Ask what's covered, for how long, and whether you need to register the equipment to get the full term.

What about the refrigerant change?

The HVAC industry is moving away from R-410A, the refrigerant most systems used for years, toward newer refrigerants with lower climate impact. New complete R-410A systems are no longer being manufactured (NAHB).

In May 2026, the EPA finalized a rule that lets R-410A units manufactured or imported before January 1, 2025, continue to be installed until existing supplies run out. The rule took effect July 27, 2026 (NAHB). State law can be stricter. NAHB notes that New York kept the original January 1, 2026 deadline, so no R-410A systems can be installed there.

What this means for you:

• You may be offered either type. Ask which refrigerant each option uses.
• Servicing costs can differ. NAHB notes R-410A production is being cut back year by year, which will affect the supply for future repairs (NAHB).
• Older R-22 systems are a separate story. You can no longer buy a new central AC that uses R-22, though you can keep servicing an existing one (EPA).

What does a new AC cost to run?

The purchase price is only part of the cost. Fixr cites the U.S. Department of Energy in saying air conditioning accounts for about 12% of a home's annual electricity use (Fixr). Based on the national average electric bill, Fixr works that out to about $16.42 per month (Fixr). It notes costs can be much higher in hot climates or with less efficient systems.

That's why efficiency and correct installation matter. A right-sized, properly charged system with sealed ducts uses less power than an oversized one fighting leaky ducts, even if both carry the same rating on paper. When you compare quotes, compare expected running costs, not just the installed price.

Are there tax credits or rebates?

The federal energy efficiency tax credits for home heating and cooling equipment ran through December 31, 2025, according to ENERGY STAR (ENERGY STAR). Don't count on a federal credit for a 2026 installation unless a tax professional confirms one applies.

Utility and state rebates may still be available. ENERGY STAR suggests checking for rebates on ENERGY STAR heating and cooling equipment before you buy (ENERGY STAR). Your electric utility's website is a good place to start.

How can you lower the cost of a new AC?

• Replace before it fails, if you can. A planned replacement gives you time to compare quotes. An emergency in July doesn't.
• Schedule in spring or fall. Fixr says off-season installation can mean lower labor costs because demand is lower (Fixr).
• Get at least three estimates. Fixr recommends comparing at least three quotes (Fixr).
• Size it right. A load calculation prevents paying for capacity you don't need.
• Fix the ducts. New equipment can't perform well through leaky ducts.
• Look for utility rebates on qualifying equipment.

What questions should you ask before you sign?

1. How did you size the system? Did you do a load calculation?
2. What are the model numbers, the matched SEER2 rating and the refrigerant type?
3. What's included: removal of the old unit, new refrigerant lines, the pad, electrical work, a thermostat and the permit?
4. Will you inspect and test the ducts, and what would repairs cost?
5. Will you test the refrigerant charge and airflow after installation?
6. What warranties come with the equipment and your labor, and do I need to register anything?
7. What would a repair cost instead, and why do you recommend replacing?
8. Are you licensed and insured where I live? ENERGY STAR suggests checking your state's requirements (ENERGY STAR).
9. When can you install, and how long will the job take?

Be wary of a quote given without anyone looking at your home. Fixr advises avoiding companies that offer estimates without an inspection (Fixr). Pressure to sign the same day is another reason to slow down.

The bottom line

A central AC replacement typically costs several thousand dollars, and the range is wide. Size, efficiency, ductwork and what's included in the quote explain most of the difference. ENERGY STAR's rule of thumb is to start thinking about replacement once your AC is more than 10 years old, especially if repairs and bills are climbing.

Get a load calculation, compare at least three itemized quotes and ask about refrigerant type and duct testing. If you're not sure whether you need a repair or a replacement, Check my heating & AC walks you through the likely causes and can connect you with a local company for a quote.