The short answer
Revenue is the total money your HVAC business takes in. Profit is what is left after every cost is paid. A company can hit a million dollars in revenue and still feel broke because revenue is a vanity number and profit is the truth. When margins are thin, more revenue just means more work for the same tired bank account. The fix is not always more sales. It is usually better margins, tighter overhead, and pricing that reflects what the work actually costs.
This is the most common frustration in the trades, and it almost always comes down to the gap between the top line and the bottom line.
Revenue is the headline. It is the number you say out loud at the supply house. But revenue tells you nothing about whether the work was worth doing. You can grow revenue and shrink profit at the same time, by taking low-margin jobs, eating cost overruns, or letting overhead creep up to match the new volume. Plenty of contractors have grown themselves straight into a cash crisis because the business got bigger but never got more profitable.
Profit is the quiet number that decides whether you can pay yourself, build a reserve, and sleep at night.
Two companies, same revenue, very different reality.
| Company A | Company B | |
|---|---|---|
| Revenue | $1,000,000 | $1,000,000 |
| Net profit margin | 5% | 12% |
| Net profit | $50,000 | $120,000 |
Same trucks on the road. Same million on the sign. Company B keeps more than twice as much. The difference is not luck and it is not volume. It is margin. And margin is something you can actually control.
Equipment and material costs have climbed hard in recent years. Plenty of contractors are still pricing close to where they were a couple of years ago, afraid to lose a bid. The result is jobs that win on price and lose on profit. If you have not reviewed your pricing against current costs lately, this is the first place to look.
Labor is your biggest variable cost. When jobs consistently take longer than estimated, when callbacks and warranty trips pile up, or when you price off the bare wage instead of the burdened rate, margin disappears one job at a time. This is why job costing and profit are inseparable.
As revenue grows, overhead has a habit of growing right alongside it: more software, more admin, more trucks, a bigger office. Some of that is necessary. Some of it is just drift. Overhead that creeps up faster than profit is a silent margin killer.
The instinct when money is tight is to sell more. Sometimes that is right. Often it is the slow road. Here is the faster path.
Raise your prices to reflect real costs, starting with your lowest-margin job types. Tighten your job costing so you catch the work that loses money and stop repeating it. Shift more of your mix toward higher-margin work like maintenance agreements and service, which also smooth out your cash flow. Trim the overhead that is not pulling its weight. And watch net profit margin every month as your real scoreboard, not revenue.
A 3 point improvement in net margin on a million in revenue is 30,000 dollars more in your pocket, with the same trucks and the same crews. That is almost always easier to find than another million in sales.
| $50K |
| $120K |
What is the difference between revenue and profit?
Revenue is the total money your business takes in from jobs. Profit is what is left after all costs, including materials, labor, and overhead, are paid. Revenue measures activity. Profit measures success.
What is a good net profit margin for an HVAC company?
Many healthy HVAC businesses target a net profit margin in the high single digits to mid teens. The right number depends on your job mix and overhead, but if you are in the low single digits, there is usually margin to recover.
Why is my HVAC business not profitable even though revenue is up?
Common causes are pricing that has not kept up with costs, labor running over estimate, and overhead growing alongside revenue. Growing revenue with broken margins makes the problem bigger.
Should I focus on more sales or better margins?
For most contractors with thin margins, improving margin is the faster and more durable path. A few points of net margin on existing revenue often beats the effort of chasing the same dollars in new sales.
Jeremy Brewer is the founder of 911 Bookkeepers LLC in Baton Rouge, Louisiana. He came up through the HVAC trade and works as a licensed paramedic in EMS. He is a Xero Certified Advisor. 911 Bookkeepers is built for the trades.
Related posts in this series: HVAC Bookkeeping: The 12 Numbers · Job Costing for HVAC · Mid-Year Financial Check-Up
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