HVAC Estimating Guide
How to Bid HVAC Jobs
HVAC bidding requires balancing equipment costs, labor efficiency, and customer expectations. This guide covers pricing for installations, replacements, and service work with real-world markup strategies.
Quick Answer
HVAC installations typically use 40-65% markup on direct costs. Equipment is 40-50% of price, labor 25-35%, materials 5-10%, overhead and profit 15-25%. A 3-ton system replacement costs $3,500-$5,500 in equipment and materials, with total installed price of $7,000-$15,000.
HVAC Job Types and Pricing Approaches
Different HVAC work requires different pricing strategies:
| Job Type | Pricing Method | Typical Price Range |
|---|---|---|
| System replacement (like-for-like) | Flat rate by tonnage | $7,000-$15,000 |
| New construction install | Per-ton or per-CFM | $3,500-$6,000/ton |
| Ductwork only | Per linear foot or CFM | $35-$55/linear foot |
| Service/repair | Flat rate book | $150-$500+ per repair |
| Maintenance agreement | Annual contract | $150-$400/year |
| Mini-split installation | Per zone/head | $3,000-$5,000/zone |
Calculating Equipment Costs
Equipment represents the largest portion of HVAC bid costs:
| Equipment Type | Contractor Cost | Typical Installed Price |
|---|---|---|
| Entry-level AC (14 SEER) | $1,500-$2,500 | $4,500-$7,000 |
| Mid-range AC (16-18 SEER) | $2,500-$4,000 | $6,000-$10,000 |
| Premium AC (20+ SEER) | $4,000-$7,000 | $9,000-$15,000 |
| Gas furnace (80% AFUE) | $800-$1,500 | $2,500-$4,500 |
| Gas furnace (96%+ AFUE) | $1,500-$3,000 | $4,000-$7,000 |
| Heat pump | $2,500-$5,000 | $6,000-$12,000 |
| Mini-split (single zone) | $1,000-$2,000 | $3,000-$5,000 |
Equipment Markup Strategy
Most HVAC contractors use 30-50% equipment markup. Higher-efficiency equipment warrants higher margins due to added complexity and expertise required for proper installation.
Labor Hour Estimates
Standard labor times for common HVAC work:
| Task | Labor Hours (2-person crew) | Notes |
|---|---|---|
| AC changeout (same location) | 4-6 hours | Straightforward swap |
| Furnace changeout | 4-6 hours | Standard replacement |
| Complete system (AC + furnace) | 8-12 hours | Same day completion |
| System with new ductwork | 16-32 hours | May require 2 days |
| Mini-split (single zone) | 4-6 hours | Wall mount, standard |
| Mini-split (multi-zone, 3 heads) | 12-16 hours | More line runs, electrical |
Burdened labor rate: $45-$75/hour including wages, workers comp, benefits, and payroll taxes.
The HVAC Bid Formula
HVAC Installation Bid
Bid = (Equipment + Labor + Materials) × (1 + Overhead%) ÷ (1 – Profit%)
Example: 3-Ton AC Replacement
- Equipment: $2,800 (16 SEER condenser + coil)
- Labor: 10 hours × 2 techs × $55/hour = $1,100
- Materials: $350 (refrigerant, electrical, misc)
- Permit: $150
- Direct costs: $4,400
- With 40% overhead: $4,400 × 1.40 = $6,160
- For 18% profit: $6,160 ÷ 0.82 = $7,512 bid
Complexity Adjustments
| Factor | Price Adjustment |
|---|---|
| Attic installation (vs basement) | +$300-$800 |
| Difficult access (tight spaces, ladders) | +15-25% |
| Electrical upgrade required | +$500-$1,500 |
| New line set run | +$400-$800 |
| Duct modifications | +$500-$2,000 |
| Zoning system addition | +$2,000-$4,000 |
| Weekend/after-hours install | +10-20% |
Load Calculation Matters
Never size equipment by “same as old system.” Perform Manual J load calculations to properly size systems. Oversized systems short-cycle, undersized systems can’t keep up. Improper sizing leads to callbacks and warranty issues.
Service Call Pricing
Many HVAC companies use flat-rate pricing books for service work:
- Diagnostic fee: $89-$150 (often waived with repair)
- Capacitor replacement: $150-$300
- Contactor replacement: $150-$275
- Refrigerant recharge (per lb): $50-$150
- Blower motor replacement: $400-$700
- Compressor replacement: $1,500-$3,000
Flat-rate books provide consistent pricing and eliminate time-based billing debates. They typically build in 60-70% gross margin on parts and labor combined.
Free Tool: Use our Roof Replacement Cost Calculator to get instant estimates for your area.
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