How much does a new AC unit cost in 2026?

Last updated: October 11, 2026

Short answer: most homeowners pay somewhere between about $5,000 and $15,000 to replace a central air conditioner in 2026, installed. That is a wide range, and it is wide for good reasons. The price of the outdoor unit is only one part of the bill. Size, efficiency, the condition of your ducts and wiring, and a refrigerant change that is reshaping the market all move the number. This guide explains each one, so the quotes you get make sense.

What you will pay, piece by piece

Part of the job	Typical 2026 cost
Complete central AC replacement, installed (most homes)	$5,000 – $15,000
The air conditioner itself, 2-ton	$2,800 – $4,000
The air conditioner itself, 3-ton	$3,500 – $5,000
The air conditioner itself, 4-ton	$4,000 – $6,000
The air conditioner itself, 5-ton	$4,500 – $7,500
Adding ductwork	$2,000 – $10,000
Electrical panel upgrade, if needed	$1,000 – $3,000

Figures from Modernize’s 2026 cost data (see Sources). The gap between the equipment price and the installed total is labor, the indoor coil, refrigerant lines, a pad, electrical work, permits and removal of the old system.

What should be in the quote

A central air conditioner is a split system: a condenser outside and an evaporator coil inside, usually sitting on top of your furnace or air handler, joined by copper refrigerant lines. A complete quote should say which of these are being replaced. Look for:

The outdoor unit — brand, model number, size in tons and SEER2 rating.
The indoor coil. A new outdoor unit needs a matched coil to reach its rated efficiency, and the refrigerant change described below makes old coils a poor fit.
The line set — whether the copper lines are replaced or flushed and reused.
Electrical work — a new disconnect, wiring or breaker if the new unit needs one.
Permit, haul-away and start-up, plus the labor warranty in years.

Two quotes that look $2,000 apart are often quoting different scopes. Line them up item by item before you compare totals.

Size: why “tons” matter more than square feet

Air conditioners are sized in tons; one ton is 12,000 Btu per hour of cooling. Most houses use somewhere between 2 and 5 tons, and every step up adds to the price of the unit. Rules of thumb based on floor area are a starting point at best. Insulation, window area, the direction the house faces, ceiling height and your climate all change how much cooling a home needs.

A good contractor will do a load calculation (the industry standard is ACCA Manual J) rather than simply matching the size of your old unit. An oversized system is not a bonus: it cools in short bursts, removes less humidity and wears out sooner. If your old system was the wrong size, replacement is the time to fix it.

Efficiency: the SEER2 minimum where you live

Efficiency is rated in SEER2, a measure of cooling delivered per unit of electricity over a season. In 2023 the U.S. Department of Energy raised the minimums and moved to the SEER2 test, which gives numbers roughly 5% lower than the old SEER scale for the same equipment. The minimum for a split-system central air conditioner depends on your region:

Region	States	Minimum
North	All states not listed below	13.4 SEER2
Southeast	AL, AR, DE, FL, GA, HI, KY, LA, MD, MS, NC, OK, SC, TN, TX, VA and DC	14.3 SEER2 (13.8 for systems of 45,000 Btu/h and up)
Southwest	AZ, CA, NV, NM	14.3 SEER2 plus an EER2 minimum for peak-heat efficiency

Going beyond the minimum costs more up front and pays back through lower bills. How fast depends on how hard your system works. In a long, hot cooling season a two-stage or variable-speed unit at 16–18 SEER2 can earn back its premium. In a mild climate where the AC runs a few weeks a year, the minimum efficiency is often the better buy.

The refrigerant change

For two decades most home air conditioners used R-410A. Under the federal HFC phase-down, new residential split systems have not been manufactured with R-410A since January 1, 2025. New equipment uses lower-impact refrigerants, mainly R-454B and R-32. In May 2026 the EPA removed a deadline that would have stopped older R-410A units from being installed, so systems built before 2025 can still be installed until supply runs out. New York keeps its own earlier deadline.

What this means for you: a quote for an R-410A unit is not illegal, but it is old stock. Future repairs will rely on a refrigerant that is being phased down. New refrigerants also need a matching indoor coil, which is why “outdoor unit only” replacements are rarer than they used to be. Ask every contractor which refrigerant their quote uses.

The tax credit is gone — rebates are not

Until the end of 2025, a qualifying central air conditioner earned a federal tax credit of up to $600 under section 25C. That credit is not allowed for equipment placed in service after December 31, 2025, so a 2026 installation does not qualify. Many electric utilities and some states still run their own rebates for efficient equipment. Check your utility’s website before you sign, because some rebates require pre-approval or a participating contractor.

Repair or replace?

Replacement usually makes more sense than another repair when:

The system is around 15 years old or more and needs a major part such as a compressor.
It uses R-22 refrigerant. Production and import of R-22 ended in 2020, so recharging an old system is expensive and getting harder.
Repair bills are becoming a yearly event, or the house never feels evenly cool.

A young system with a failed capacitor, fan motor or contactor is a repair, not a replacement. Be wary of anyone who says otherwise without showing you why.

Five ways to keep the price down

Get at least three itemized quotes for the same scope.
Replace in spring or fall, when installers are less busy than during a heat wave.
Ask about utility rebates and any manufacturer promotions before choosing a model.
Have the ducts checked; sealing leaks can let a smaller, cheaper unit do the job.
Buy the efficiency your climate justifies, not the highest number on the brochure.

Whoever you choose, check that they hold the license your state requires and carry insurance, and get the price, model numbers and warranty in writing.

Frequently asked questions

How much does it cost to replace a central air conditioner in 2026?

Published 2026 cost guides put most installed replacements between about $5,000 and $15,000. Where you land depends on the size of the system, its efficiency rating, whether the indoor coil and line set are replaced too, and whether your ductwork or electrical panel needs work.

Is there still a federal tax credit for a new air conditioner?

No. The federal Energy Efficient Home Improvement Credit (section 25C) is not allowed for equipment placed in service after December 31, 2025. State, utility and income-qualified rebate programs are separate and may still be available where you live.

What SEER2 rating does a new AC need?

It depends on your region. Since 2023 the federal minimum for a split-system central air conditioner is 13.4 SEER2 in northern states and 14.3 SEER2 for most systems in the Southeast and Southwest, which also have an EER2 requirement.

Can I still buy an AC that uses R-410A refrigerant?

Only from old stock. New residential split systems have not been manufactured with R-410A since January 1, 2025, but a May 2026 EPA rule lets units made before then be installed until supply runs out. New York keeps its own earlier deadline.

Should I replace the furnace at the same time?

Not automatically. If the furnace is near the end of its life, replacing both together saves a second visit and lets the contractor match the indoor equipment. If it is young and working well, replacing only the outdoor unit and coil is usually fine.

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Sources

Prices are estimates for typical US homes, not quotes; your price depends on your home, region and the products you choose.