How Much Does AC Installation Cost?
Central AC installation costs $3,000-$7,000 for a replacement unit and $5,000-$12,000 for a complete new system with ductwork. Mini splits cost $2,000-$5,000 per zone. Factors: home size, SEER rating (higher = more efficient + more expensive), ductwork condition, and local labor rates.
Cost Breakdown
| Service | Low | High | Notes |
|---|---|---|---|
| Central AC replacement | $3,000 | $7,000 | Existing ductwork |
| Full system + ductwork | $5,000 | $12,000 | New installation |
| Mini split (single) | $2,000 | $5,000 | One zone |
| Mini split (multi) | $4,000 | $12,000 | 2-4 zones |
| Federal tax credit | $0 | $2,000 | High-efficiency units |
| Utility rebates | $200 | $1,000 | Varies by provider |
AC Installation Costs in 2026
By System Type
- Central AC replacement (existing ductwork): $3,000-$7,000 — most common scenario, replaces old outdoor and indoor units
- Central AC + ductwork (new install): $5,000-$12,000 — for homes without existing ductwork
- Ductless mini split (single zone): $2,000-$5,000 — great for additions, garages, or homes without ducts
- Ductless mini split (multi-zone): $4,000-$12,000 — 2-4 indoor units connected to one outdoor unit
- Window AC: $150-$800 — per-room solution, no installation required
By Home Size
- 1,000-1,500 sq ft (2-2.5 ton): $2,500-$5,000
- 1,500-2,000 sq ft (3-3.5 ton): $3,500-$6,500
- 2,000-2,500 sq ft (4 ton): $4,500-$8,000
- 2,500-3,000 sq ft (5 ton): $5,500-$10,000
SEER Rating Impact
SEER (Seasonal Energy Efficiency Ratio) measures efficiency. Minimum is now 15 SEER (14 in some regions). Higher SEER costs more upfront but saves on energy bills:
- 15 SEER: Base price — meets minimum requirements
- 18 SEER: +$500-$1,500 — good balance of cost and efficiency
- 20+ SEER: +$1,500-$3,000 — maximum savings, qualifies for rebates
Tax Credits and Rebates
The Inflation Reduction Act offers up to $2,000 in tax credits for high-efficiency AC and heat pump installations. Many utilities offer additional rebates of $200-$1,000. These can reduce net cost by 20-30%.
Related Questions
How long does AC installation take?
Replacement with existing ductwork: 4-8 hours (1 day). New installation with ductwork: 3-5 days. Mini split: 1-2 days. Schedule installation in spring or fall for better availability and potentially lower prices.
What size AC unit do I need?
Rule of thumb: 1 ton per 500-600 square feet. A 2,000 sq ft home needs about 3.5 tons. However, a Manual J load calculation (considering insulation, windows, climate, and layout) gives the accurate answer. Oversized units short-cycle and waste energy.
Should I replace AC and furnace at the same time?
Usually yes — matching systems are more efficient and prevent compatibility issues. Most companies offer package pricing that is 10-15% cheaper than replacing separately. If one unit is under 5 years old, replacing just the other is fine.