HVAC Flat Rate vs Hourly: Which Pricing Model Makes You More Money?
Comparing flat rate and hourly pricing for HVAC businesses. Real numbers on which model is more profitable, when to use each, and how to switch without losing customers.
This is probably the most argued-about topic in HVAC Facebook groups. Half the guys swear flat rate is the only way to run a profitable shop. The other half think flat rate is a scam that rips off customers. Both sides have a point, which is what makes it annoying.
I'm going to lay out the actual math behind both models so you can decide based on numbers instead of opinions.
How hourly pricing works (and where it breaks)
Hourly pricing is simple. You charge a service call fee to show up, then bill for time on-site plus materials. Most HVAC companies running hourly charge somewhere between $75 and $150 per hour depending on the market, plus a $50-100 service call fee.
Here's a typical furnace repair under hourly billing:
| Item | Amount |
|---|---|
| Service call fee | $89 |
| Diagnosis (0.5 hr at $110/hr) | $55 |
| Repair labor (1.0 hr at $110/hr) | $110 |
| Flame sensor (part) | $18 |
| Total | $272 |
The customer pays $272. Your actual costs on this job (tech wages, truck, overhead per hour) might be $160. So you made $112 in gross profit. Not bad for a 1.5-hour job.
The problem shows up in two places.
First, your experienced techs get faster over time. A senior tech who can diagnose and swap a flame sensor in 30 minutes earns you less than a slower tech who takes 90 minutes. You're literally penalizing efficiency. Your best people make you the least money per job.
Second, customers hate watching the clock. They see the tech on the phone with a supplier for 15 minutes and think "I'm paying $110/hour for him to be on hold." Even if the call is necessary, it creates friction and bad reviews.
How flat rate pricing works
Flat rate means you quote a fixed price for the repair before you start. The customer knows the total cost upfront. Whether the job takes 30 minutes or 2 hours, the price doesn't change.
That same furnace repair under flat rate pricing:
| Item | Amount |
|---|---|
| Service/diagnostic fee | $89 |
| Flame sensor replacement (flat rate) | $285 |
| Total | $374 |
Higher total, but the customer agreed to it before the tech picked up a wrench. No surprises.
Your costs are the same $160. Gross profit is now $214. On the exact same job.
This is why flat rate companies tend to have higher revenue per call. The price reflects the value of the repair to the customer (a working furnace in January), not just the time it takes your tech to do it.
The real comparison
Let's look at a full day for one tech under each model.
| Metric | Hourly | Flat rate |
|---|---|---|
| Calls per day | 5 | 6 |
| Average ticket | $280 | $410 |
| Daily revenue | $1,400 | $2,460 |
| Daily cost (wages, truck, overhead) | $650 | $680 |
| Daily gross profit | $750 | $1,780 |
Flat rate techs run more calls because they work faster (they're incentivized to). And each call generates more revenue. The difference over a month, per tech, is massive.
Before anyone gets upset: those flat rate numbers assume you've built a good price book and your techs are trained to present options. Throwing a flat rate price list at an untrained tech who can't explain value to a customer will backfire.
When hourly still makes sense
Flat rate isn't always the right call. Hourly works better for:
- Commercial and contract work where the customer has a maintenance agreement and expects hourly billing
- Complex diagnostic jobs where you genuinely don't know the scope until you open things up
- New construction and rough-in work billed by the hour or by the project
- Small shops without the volume to build and maintain a flat rate price book
Some companies use a hybrid: flat rate for residential service calls, hourly for commercial contracts. That works well if your dispatching and invoicing can handle both.
How to switch from hourly to flat rate
If you're running hourly now and want to try flat rate, here's the practical path:
Step 1: Build your price book. Take your 50 most common repairs. For each one, calculate: average material cost + average labor time at your desired hourly rate + overhead + profit margin. That's your flat rate price. Our HVAC pricing calculator can help you figure out the right numbers for each repair.
Step 2: Check your prices against the market. Use a resource like our contractor rates tool to see what HVAC companies in your area are charging. You don't want to be the cheapest or the most expensive. Somewhere in the top third is where you want to land.
Step 3: Train your techs. This is where most companies fail. Your techs need to present options, not just prices. "I can replace the flame sensor for $285, or if you want, I can also clean the burner assembly and check the heat exchanger for $425. Both come with a 1-year warranty." That's a conversation, not a hard sell.
Step 4: Start with new customers. Don't surprise your existing hourly customers with a new pricing model. Phase it in with new calls first, then transition existing customers as they come in for service.
What about the "flat rate is a ripoff" argument?
You'll hear this from other contractors and from some customers. The complaint is usually: "A $15 part shouldn't cost $285 to install."
The customer isn't paying for a $15 part. They're paying for the tech who knows which $15 part to buy, the truck that showed up within 2 hours, the training that means it gets done right, the warranty if something goes wrong, and the fact that their furnace works again on a Tuesday night in February. That's worth $285.
If you're uncomfortable with flat rate pricing, it's usually because you haven't calculated what your services actually cost to deliver. When you see the real numbers (wages, insurance, truck costs, callbacks, unbillable time), the prices start looking fair.
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Whether you choose flat rate, hourly, or a mix of both, the important thing is that you've done the math. Too many HVAC companies pick a pricing model based on what their old boss did, not on what actually makes their business money. Run the numbers. The right answer will be obvious.