Replacement Cost

What a system swap costs, broken into equipment, labor and the lines that get added later.

AC replacement cost in Missouri for a 3 ton system

A central air conditioner replacement in Missouri

$7,377

3 tons · typical range $5,311 – $11,212

Typical total$2,459 per ton	$7,377
Range you should see in bidsthree bids on the same scope normally land inside this	$5,311 – $11,212
Labor portion45% of the job — this is the part that moves by state	$3,319
Material portion55% — bought at national prices	$4,057
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	−$123

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 $7,377 quote into a $9,221 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 $123.
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.

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