Cost

Per head, per system, and against a ducted alternative.

Mini split installation cost in Missouri for 3 heads

A ductless mini-split installation in Missouri

$10,013

3 indoor heads · typical range $6,479 – $15,315

Typical total$3,338 per indoor head	$10,013
Range you should see in bidsthree bids on the same scope normally land inside this	$6,479 – $15,315
Labor portion50% of the job — this is the part that moves by state	$5,007
Material portion50% — bought at national prices	$5,007
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	−$187

Notes

Where the number comes from. The national price for a ductless mini-split installation is $3,400 per indoor head — ductless mini-split pricing published for 2026, $2,200–$5,200 per indoor head installed. Labor is about 50% 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 outdoor unit, the indoor heads, line sets, wall penetrations, a condensate route, electrical connection, mounting and labor.
What is not: a new electrical circuit or panel capacity, a condensate pump where gravity will not do, decorative line-set covers, and drywall repair. These are the lines that turn a $10,013 quote into a $12,517 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 50% of the job and moves the total by $187.
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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