TonnageMapHow many tons your house actually needs, and what the swap costs.

AC replacement cost in Missouri for a 5 ton system

A central air conditioner replacement in Missouri
$12,294
5 tons · typical range $8,852 – $18,687
Typical total$2,459 per ton$12,294
Range you should see in bidsthree bids on the same scope normally land inside this$8,852 – $18,687
Labor portion45% of the job — this is the part that moves by state$5,532
Material portion55% — bought at national prices$6,762
Heating, Air Conditioning, and Refrigeration Mechanics and Installers pay in Missouriabout $30/hr · BLS OEWS May 2025, SOC 49-9021$62,410/yr
U.S. mean for the same tradeSOC 49-9021$64,780/yr
Versus the national priceMissouri trade pay runs −3.7% against the U.S. mean−$206

Notes

  • Where the number comes from. The national price for a central air conditioner replacement is $2,500 per ton — central AC replacement pricing published for 2026, $1,800–$3,800 per ton installed. Labor is about 45% of that. Heating, Air Conditioning, and Refrigeration Mechanics and Installers in Missouri average $62,410 a year against a U.S. mean of $64,780 — a factor of 0.963 — so the labor half is scaled by that and the material half is not.
  • What is in the price: the condenser, the matching indoor coil, a new line set where the run allows, refrigerant charge, a pad, electrical connection, permit and labor.
  • What is not: ductwork repair or replacement, a new electrical circuit or panel capacity, asbestos abatement on old duct wrap, and any drywall work. These are the lines that turn a $12,294 quote into a $15,368 invoice, so ask about each one before signing.
  • Why state matters more than people expect. Materials ship at national prices; crews do not move. Missouri sits below the national mean by 3.7%, which lands on 45% of the job and moves the total by $206.
  • Use this as a bid check, not a quote. It prices an average job in an average condition. Difficult access, the state of what is being replaced, the season, and a crew booked out three months all move the real number, and none of them are in a per-unit average.

A 5 ton AC replacement in Missouri

$12,294 is the typical figure, and bids on the same scope normally land between $8,852 and $18,687. That is 5 tons at $2,459 each.

Why this is not the national number

The same job priced at the U.S. average comes to $12,500 — this one is $206 less.

Heating, Air Conditioning, and Refrigeration Mechanics and Installers in Missouri average $62,410 a year against a U.S. mean of $64,780, from the Bureau of Labor Statistics OEWS release for May 2025, SOC 49-9021. That is roughly $30 an hour of trade pay, a factor of 0.963.

Labour is about 45% of this job; equipment is the other 55% and it costs the same in every state. So only the labour half is scaled here.

$5,532 of labour, $6,762 of equipment.

What moves a quote inside the range

A straight condenser-and-coil swap that reuses the line set and the pad sits near the bottom. A replacement that needs a new line set run through a finished wall, an electrical disconnect brought up to code, and a crane for a rooftop unit sits near the top.

The thing that is not in the price, and usually should be

Ductwork. A system replaced onto duct that was undersized for the old equipment performs no better than the old equipment did — and the new unit gets blamed. Ask for a static pressure reading before signing, not after.

Do not copy the old size

The unit being replaced was very likely oversized; contractors have rounded up for decades. A Manual J costs a few hundred dollars against this figure and is the only way to know whether 5 tons is right for the house rather than right for whatever was there before.

Using this against a real bid

Three quotes on identical scope should cluster. One well under $8,852 usually means something was left out rather than found cheaper. One well over $18,687 is either a harder job than average or a crew that does not want the work.

Nearby sizes

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