Central AC Installation Cost in 2026: What You'll Pay

What you'll actually pay

Installing central air conditioning costs about $6,000 on national average, with most homeowners landing between $5,000 and $12,000 all-in. Fixr puts the national average at $6,000 with most projects in that $5,000 to $12,000 band, HomeAdvisor reports an average of $5,978 with a $3,887 to $8,073 range, and Modernize's national comparison figure is $6,122.

AllBetter's 2026 data sits a little lower, with most homes paying $3,500 to $7,500 and an average around $5,500, which reflects straightforward like-for-like replacements on existing ductwork.

One figure to treat carefully: a June 2026 CBS News number of $13,000 to $16,000 reflects a full HVAC system replacement (heating plus cooling combined), not AC-only installation. If you are replacing only the cooling equipment on an existing forced-air system, your costs will typically be well below that range.

Sources: Fixr: How Much Does AC Installation Cost? (Fixr, 2026), North Air Savings (HomeAdvisor 2026 data): Central Air Conditioner Replacement Cost (HomeAdvisor 2026 data), Modernize: Air Conditioning Replacement Cost in Austin TX (Modernize, 2026), AllBetter: AC Replacement Cost 2026: Prices by Tonnage and SEER2 (AllBetter), iBuyer: What Central AC Installation Costs in 2026 (iBuyer)

Cost by system size: tonnage

Tonnage is the biggest lever on price. Fixr's installed ranges run from $3,650 to $6,250 for a 1.5-ton unit (roughly 600 to 1,000 sq ft) up to $7,800 to $14,000 for a 5-ton unit (3,200 to 4,000 sq ft). In between: 2 ton $4,250 to $7,500; 2.5 ton $4,500 to $8,000; 3 ton $5,000 to $9,150; 3.5 ton $5,450 to $9,700; 4 ton $6,950 to $11,600.

AllBetter corroborates the band: 1.5 ton $3,500 to $5,000; 2 ton $3,800 to $5,500; 2.5 ton $4,200 to $6,000; 3 ton $4,500 to $6,800; 4 ton $5,200 to $8,000; 5 ton $6,000 to $9,500. Each added ton adds roughly $500 to $1,200 to the installed price.

Square footage is only a rough map: insulation, windows, ceiling height, and climate all shift sizing. A proper install starts with a Manual J load calculation rather than matching the old unit's label. An oversized unit short-cycles, dehumidifies poorly, and dies younger.

Sources: Fixr: Cost to Install Central Air (Fixr, 2026), AllBetter: AC Replacement Cost 2026: Prices by Tonnage and SEER2 (AllBetter), HomeCostCalcs: Furnace and AC Replacement Cost Calculator (HomeCostCalcs, 2026)

Cost by efficiency tier (SEER2)

Standard-efficiency systems (at the federal minimum) install for $3,800 to $7,500, while high-SEER systems run $6,000 to $12,000. Federal minimums in force since January 2023 are 13.4 SEER2 in northern states and 14.3 SEER2 in southern states.

Standard replacements on existing ductwork typically land between $5,800 and $6,500 in 2026. Equipment alone accounts for $2,500 to $8,000 of the total; labor for a standard replacement runs $1,500 to $3,500, based on 6 to 10 hours of work at $50 to $150 per hour.

Higher SEER2 ratings mean lower operating costs but a higher upfront price, so the right tier depends on how long you will live with the bills and how hot your summers run.

Sources: HomeCostCalcs: Furnace and AC Replacement Cost Calculator (HomeCostCalcs, 2026), iBuyer: What Central AC Installation Costs in 2026 (iBuyer)

System types: split vs packaged

Most homes get a split system: an outdoor condenser plus an indoor coil that sits on the furnace and uses its air handler and ducts. Split systems cost $3,800 to $7,700 for the unit and are the most economical choice when your furnace and ducts are in good shape.

Packaged AC systems put everything in one outdoor cabinet and cost $4,000 to $8,500 for the unit. Packaged HVAC units that combine AC and furnace in a single cabinet run $9,200 to $10,800.

If your furnace is fairly new and your ducts are less than 15 years old, a split system is the money move. If you lack a furnace and ducts entirely, or need both replaced, an all-in-one package can cut installation cost and parts. Our ductless mini split installation cost guide prices the no-ductwork alternative.

Sources: Fixr: Cost to Install Central Air (Fixr, 2026)

What drives the price up

Ductwork is the biggest wildcard. Reusing sound existing ducts is standard for like-for-like replacements; new or heavily modified ductwork adds thousands. Quotes that omit duct scope make comparison difficult, so ask every contractor to itemize the same scope.

Permits add $150 to $500 depending on the municipality and are sometimes listed as a separate line item. Refrigerant adds another wrinkle: R-410A is being phased out, so 2026 equipment is mostly R-32 or R-454B. The price difference on equivalent equipment is small ($0 to $300), but R-410A service will get more expensive over time as supply tightens.

Timing matters too: buying in spring or fall saves 10 to 15 percent as retailers clear prior-year models and installers are less busy than in peak summer. And always get at least three in-home quotes; quotes that separate equipment from labor, or omit permit fees entirely, are hard to compare.

For perspective, central AC installation ranks #9 of 33 common projects by typical installed cost in our 2026 Home Improvement Cost Index.

Sources: iBuyer: What Central AC Installation Costs in 2026 (iBuyer), FurnacePrices.ca: Central Air Conditioner Prices 2026 (FurnacePrices.ca), Angi: When Is the Best Time to Buy an Air Conditioner? (Angi, 2026)

Which central AC quote is yours: three install scenarios that explain the price spread

The budget scenario is the like-for-like swap on ductwork that already works. iBuyer puts standard replacements on existing ductwork at $5,800 to $6,500 in 2026, AllBetter has most homes paying $3,500 to $7,500 with an average around $5,500, and HomeAdvisor reports an average of $5,978 within a $3,887 to $8,073 range, and all three datasets describe straightforward replacements rather than system redesigns. A split system, an outdoor condenser plus an indoor coil that reuses the furnace's air handler and ducts, costs $3,800 to $7,700 for the unit and is the most economical choice when the furnace and ducts are in good shape. Timing is the free discount: Angi finds spring or fall installs run 10 to 15 percent cheaper than peak-summer emergency replacements. If your ducts are sound, the furnace is reasonably young, and you can schedule before summer hits, you are quoting the budget scenario.

The middle scenario is the right-sized system at the efficiency tier you will live with. HomeCostCalcs puts standard-efficiency installs at $3,800 to $7,500 and high-SEER systems at $6,000 to $12,000, and the federal minimums in force since January 2023 are 13.4 SEER2 in northern states and 14.3 SEER2 in southern states, so every new unit clears a meaningful efficiency floor. Each added ton of capacity adds roughly $500 to $1,200 to the installed price, which is why the unit should be sized by a load calculation rather than matched to the old unit's label: oversized systems short-cycle, dehumidify poorly, and die young. Higher SEER2 means lower operating costs against a higher upfront price, so the tier decision is really about how long you will live with the bills and how hot your summers run. Federal 25C credits of up to $600 for qualifying high-efficiency central AC trim the effective cost of the upper tiers.

The expensive scenario is the project where the ducts, the heating system, or both come along for the ride. Reusing sound ducts is standard for swaps, but new or heavily modified ductwork replacement adds thousands on top of the equipment. Packaged HVAC units that combine AC and furnace in one cabinet run $9,200 to $10,800 for the unit, and a full furnace-plus-AC replacement typically costs $7,000 to $14,000 installed at standard efficiency, which is usually cheaper than two separate jobs because you share one installation visit and the systems are matched for efficiency. One figure to file carefully: the $13,000 to $16,000 number seen in 2026 coverage reflects a full HVAC system replacement, heating plus cooling combined, not AC-only installation, so quotes in that territory should be judged against the bundle, not the AC line item. And on refrigerant, 2026 equipment is mostly R-32 or R-454B as R-410A phases out: the price difference on equivalent equipment is small ($0 to $300), but R-410A service will get more expensive as supply tightens.

Bundling the AC with a furnace replacement is the most common way homeowners cut the per-unit install cost. Our furnace installation cost guide prices the furnace side of that bundle: $5,500 national average, $3,200 to $7,800 typical, and $4,000 to $10,000 for a furnace plus AC changeout together.

Sources: iBuyer: What Central AC Installation Costs in 2026 (iBuyer), AllBetter: AC Replacement Cost 2026: Prices by Tonnage and SEER2 (AllBetter), North Air Savings (HomeAdvisor 2026 data): Central Air Conditioner Replacement Cost (HomeAdvisor 2026 data), Fixr: Cost to Install Central Air (Fixr, 2026), Angi: When Is the Best Time to Buy an Air Conditioner? (Angi, 2026), HomeCostCalcs: Furnace and AC Replacement Cost Calculator (HomeCostCalcs, 2026), Fixr: How Much Does AC Installation Cost? (Fixr, 2026), FurnacePrices.ca: Central Air Conditioner Prices 2026 (FurnacePrices.ca)

Repair vs replace, and the bundle question

Central AC units last 15 to 20 years with regular maintenance. Plan to replace at 12 to 15 years, or sooner when a repair exceeds 40 to 50 percent of replacement cost.

If both the furnace and AC are over 12 to 15 years old, replacing them together is usually cheaper than two separate jobs: a full furnace-plus-AC system typically costs $7,000 to $14,000 installed for standard efficiency, because you share one installation visit and the systems are matched for efficiency.

The other fork in the road is the heat pump: at about $8,500 average and $5,000 to $15,000 typical installed, it handles heating and cooling in one system, replacing both furnace and AC (see our heat pump installation cost guide). Federal 25C tax credits cover up to $600 for qualifying high-efficiency central AC, and IRA rebates plus utility rebates can stack further. Whatever system you choose, a smart thermostat pays back fast; our thermostat installation cost guide covers device and install pricing.

Sources: Fixr: How Much Does AC Installation Cost? (Fixr, 2026), HomeCostCalcs: Furnace and AC Replacement Cost Calculator (HomeCostCalcs, 2026)