Flat-Rate vs. Time-and-Materials Pricing for HVAC Service

How you price service calls affects close rates, tech pay, customer trust and profit. Here's how the two common models compare.

Time and materials (T&M)

The customer pays hourly labor × time + parts at a markup, often plus a trip or diagnostic fee.

Pros

• Simple to set up and explain.
• Fair on unpredictable jobs (old systems, hard access).
• Common for commercial and contract work.

Cons

• The customer doesn't know the total until the end, which slows approvals.
• Fast, skilled techs bring in less revenue per job.
• Invites haggling over time spent.

Flat rate

Each task has a fixed price quoted before work begins, such as "replace dual run capacitor" or "replace condenser fan motor."

How prices are built: average labor time for the task × your true cost per labor hour (wages, burden, trucks, overhead, non-billable time) + parts cost and markup + target profit margin.

Pros

• Customers approve faster when they know the price.
• Rewards efficient techs and makes performance pay easy to set up.
• Consistent pricing across techs.

Cons

• Requires an accurate, maintained price book.
• Underpriced tasks lose money every time; overpriced ones lose jobs.
• Hard jobs can cost more labor than the flat price covers (the averages are meant to balance out).

Building a price book

1. Calculate your real cost per billable hour. Most shops underestimate overhead and non-billable time.
2. List your most common repairs and maintenance tasks.
3. Assign average labor times from your own job history or industry guides.
4. Price parts with consistent markups.
5. Offer tiers (like good/better/best or member pricing for maintenance plan customers).
6. Review pricing regularly. Parts and refrigerant costs move, especially with the refrigerant transition.

Many field service platforms include price book tools, and some pricing services sell pre-built ones you adjust to your costs.

FAQ

Is flat-rate pricing better for HVAC?

For most residential service shops, yes, because customers prefer up-front prices. It depends on accurate pricing; a bad price book is worse than T&M.

How do I calculate my labor rate?

Add up all costs of running the business (wages, payroll burden, trucks, insurance, rent, software, marketing, admin), divide by realistic billable hours, then add your profit margin.

Should diagnostic fees be credited toward the repair?

It's a common practice that helps close repairs. Whatever you choose, state it clearly up front.

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HVAC Cheat Sheet is published by 90 Leads, a marketing company that works with home service businesses, including HVAC contractors.