Central AC replacement costs $3,500 to $14,400 per unit in 2026
Central AC replacement costs $3,500 to $14,400 in 2026. Fixr lists a national average of $8,750, and PickHVAC says most buyers pay $3,500 to $9,500. The final price depends on the size of the unit, the efficiency rating, the ductwork, and local labor rates. A small home may land near the low end. A large home with new ducts can reach the high end. Get written quotes before you choose.
What price guides say
We checked 5 price guides and read every number on their pages on October 7, 2026. They do not all measure the same thing, so read each line for what it counts.
| Source | What it found |
|---|---|
| PickHVAC | PickHVAC says buyers replacing a central air conditioner typically pay $3,500 to $9,500, with 2 to 3 ton systems averaging $5,500 and 3 to 5 ton systems averaging $7,000. |
| Fixr | Fixr lists a national average of $8,750 for central AC installation, with a typical range of $5,800 to $14,400. |
| Angi | Angi puts the average AC replacement at $5,978, and lists central AC installation at $3,500 to $7,000. |
| HomeGuide | HomeGuide says central AC alone runs $5,300 to $10,500, and central AC with ductwork runs $9,000 to $16,000. |
| This Old House | This Old House lists a central AC average of $8,460, with a range of $6,345 to $10,575. |
AC replacement cost by unit size and system
| Size or system | Installed cost | Source |
|---|---|---|
| 1.5 ton unit | $3,650 to $6,250 | Fixr |
| 2 ton unit | $4,250 to $7,500 | Fixr |
| 3 ton unit | $5,000 to $9,150 | Fixr |
| 4 ton unit | $6,950 to $11,600 | Fixr |
| 5 ton unit | $7,800 to $14,000 | Fixr |
| Central AC only | $5,300 to $10,500 | HomeGuide |
| Central AC with ductwork | $9,000 to $16,000 | HomeGuide |
Every number in this table was read on one of the source pages listed at the bottom of this page.
What pushes the price up
| What | Why it matters |
|---|---|
| Unit size | A bigger home needs more tons of cooling. Fixr shows a 1.5 ton unit at $3,650 to $6,250 and a 5 ton unit at $7,800 to $14,000. |
| Efficiency rating | A higher SEER unit uses less power but costs more. PickHVAC says moving from SEER 14 to SEER 18 adds $1,000 to $3,000 on a 3 ton unit. |
| Ductwork | Old or leaky ducts may need repair or new runs. Fixr says new ductwork adds $965 to $2,325, and HomeGuide lists central AC with ductwork at $9,000 to $16,000. |
| Labor and permits | Crews bill by the hour and towns charge permit fees. PickHVAC lists labor at $800 to $2,200 and permits and inspection at $75 to $700. |
| Home size | Bigger homes need bigger systems. Fixr lists a 1,000 square foot home at $2,900 to $7,200 and a 3,000 square foot home at $8,700 to $21,600. |
What the price includes
Most quotes cover the new outdoor unit, the indoor coil, a refrigerant charge, labor, and removal of the old unit. Extras can include a new thermostat, duct repair, line sets past 20 feet, and permits. PickHVAC lists line sets at $200 to $800 and refrigerant disposal at $75 to $400. It does not include tax or extras the provider adds on the day.
DIY or hire a pro
Central AC replacement is not a DIY job for most people. The work needs a licensed tech to handle refrigerant, set the right charge, and wire high voltage power. Many towns also require a permit and an inspection. Mistakes can void the warranty and cost more to fix later. PickHVAC lists permits and inspection at $75 to $700. You can save a little by clearing space around the outdoor unit and picking a spot for the new thermostat. Leave the rest to a pro.
How to tell you need it
Signs include an old unit, repeat repairs, high power bills, weak airflow, rooms that stay warm, loud noises, and leaks near the unit. If repair bills keep adding up, ask for a replacement price so you can compare both. Ask a tech for the repair cost and the replacement cost in writing, then decide which one makes more sense.
How to judge your quote
- Is the unit size based on a load calculation, not just the old unit?
- Does the quote list the brand, model, and SEER rating?
- Does it say if ducts, line sets, permits, and old unit removal are in the price?
- Are the labor and equipment warranties in writing?
- Compare the total with the range above: $3,500 to $14,400 per unit for most people in 2026.
Ways to pay less
- Get at least three written quotes. Prices for the same size unit differ a lot, so compare the brand, the SEER rating, and what the labor covers.
- Book in spring or fall when shops are less busy. Summer heat waves bring rush jobs, and crews have less room to cut the price.
- Pick the right size, not the biggest. An oversize unit costs more up front. Ask the contractor to show how they sized it for your home.
- Ask about rebates from your power company and any tax credits you may qualify for. Check the rules before you sign so you know what you can claim.
- Seal small duct leaks if the ducts are in good shape. That can cost less than new runs, which Fixr says add $965 to $2,325.
Why this costs more in 2026
Trade labor now runs about $75 to $150 an hour in most of the US. Lumber, steel, copper, PVC and concrete all cost more than in 2024, and freight went up after the oil shock that began with the Iran war in February 2026. New AC units now use a newer refrigerant in 2026, and many of those models cost more than the older kind.
How we got these numbers
The range on this page comes from PickHVAC, Fixr, Angi, HomeGuide and This Old House. We opened each source page and read every number on it on October 7, 2026. Where the sources disagree, the table above shows each one so you can see the spread. These are planning ranges, not quotes. The written price you are given is the real price.
Common questions
How much does AC replacement cost in 2026?
Sources put central AC replacement at $3,500 to $14,400. Fixr lists a national average of $8,750, and Angi lists an average of $5,978.
How much does a 3 ton AC unit cost?
Fixr lists a 3 ton unit at $5,000 to $9,150 installed. HomeGuide lists $5,800 to $7,800 for the same size.
Do new ducts cost extra?
Yes. Fixr says new ductwork adds $965 to $2,325. HomeGuide says central AC with ductwork runs $9,000 to $16,000.
How long does a replacement take?
HomeGuide says installation takes 4 hours to 3 days. A simple swap that keeps the same ducts is on the short end.
How much does AC labor cost?
PickHVAC lists labor at $800 to $2,200 for a typical job. Fixr lists hourly rates of $75 to $250.