How Much Should an HVAC Company Spend on Marketing?

The most common answer to this question is “5 to 10 percent of revenue.” If you’re doing $1 million a year, spend $50,000 to $100,000 on marketing. If you’re doing $500,000, spend $25,000 to $50,000.

That’s a reasonable rule of thumb. It’s also not particularly useful on its own.

The percentage-of-revenue model tells you what you can afford to spend, but it doesn’t tell you what you should spend, where to spend it, or how to know if it’s working. This article works through the actual math of HVAC marketing — what a new customer costs, what they’re worth, and how to think about budget in terms that connect directly to your revenue.

Start With What a New Customer Is Worth

Before you can think about what to spend on marketing, you need to know what you’re buying.

For a typical residential HVAC company:

System replacement (install): $8,000–$15,000
Emergency repair: $300–$1,200
Preventive maintenance visit: $100–$250
Annual maintenance agreement: $150–$400/year

But a single job number doesn’t tell the full story. A customer who comes in for an emergency repair and has a good experience becomes a candidate for a maintenance agreement. A maintenance agreement customer becomes a natural candidate for a system replacement when their equipment ages. A replacement customer refers a neighbor.

The lifetime value of a single HVAC customer — counting the initial job, repeat service, and likely referrals over a 10-year relationship — is typically in the $3,000–$8,000 range. Replacement customers at the higher end. Service-only customers at the lower end.

This number matters because it tells you how much you can rationally spend to acquire a customer and still come out ahead.

The Cost-Per-Lead Math

Marketing spend produces leads. Leads close at a certain rate. The math tells you your cost per new customer.

Here’s what Google Ads typically looks like for HVAC companies in competitive markets:

Cost per click (CPC): $15–$45 depending on the keyword and market
Conversion rate (clicks to leads): 5–10% with a well-optimized landing page
Cost per lead: $150–$450 depending on the above

If you’re spending $2,000/month on Google Ads and generating 8–12 leads, your cost per lead is $167–$250. If your close rate on those leads is 40% (typical for warm, inbound leads), you’re acquiring a new customer for approximately $420–$625.

Against an average job value of $8,000–$15,000 for a replacement, that’s a 12:1 to 35:1 return. Against a $600 repair, it’s breakeven or slightly negative — which is why the goal of HVAC marketing shouldn’t just be “get any call.” It should be “get the right calls.”

What Good Targeting Does to the Math

The difference between targeting “HVAC” and targeting “AC installation [city]” or “replace furnace near me” is enormous. Not just in cost-per-click, but in the quality of leads.

Someone searching “HVAC company” might be:

A homeowner whose AC is warm and wants a quote
A property manager looking for a commercial vendor
Someone researching careers in the trades
A student doing a report on home systems

Someone searching “cost to replace AC unit in Sacramento” is almost certainly:

A homeowner whose system is failing or already failed
Someone actively evaluating the decision to replace
Ready to talk to a company within the next 48–72 hours

The second search costs more per click. But it converts at 3–5x the rate of the first. Better leads at a lower cost per acquisition, even with a higher cost per click.

Good targeting also means excluding searches you don’t want — “HVAC jobs,” “HVAC certification,” “how does HVAC work” — through negative keyword lists. This prevents your budget from being spent on clicks that will never convert.

The Breakdown: Where Does the Money Actually Go?

If you’re working with a partner who handles your marketing for a flat monthly fee, here’s what that budget is covering:

Google Ads spend (typically $800–$2,000/month depending on market):

Actual ad spend, which goes directly to Google
This is separate from any management fee

Website and hosting:

If your site is included, this covers maintenance, updates, hosting, and ongoing optimization
If not, you need to budget separately

Google Business Profile management:

Ongoing optimization, posting, photo updates, Q&A
This doesn’t require media spend, but it requires time — which has a cost

Review generation:

Usually covered in a managed service, or you can use tools like Birdeye or Podium ($200–$400/month)

Content (blog posts, social):

Either hired out to a writer or covered in a managed service

A full-stack marketing setup for an HVAC company in a mid-size market typically runs $2,500–$5,000/month all-in, including ad spend. In very competitive markets (major metro areas), budget up.

The DIY vs. Hired Calculation

Some HVAC owners try to manage their own marketing. Let’s look at what that actually costs.

If you’re running Google Ads yourself, you’re spending:

Time to learn the platform (real learning curve, measured in weeks)
Time to build and manage campaigns (4–8 hours/month minimum for basic management)
Time to monitor, adjust, and troubleshoot when performance drops

At an owner-operator’s effective hourly rate of $150–$250/hour, 6 hours/month is $900–$1,500 in opportunity cost. That’s before accounting for the cost of mistakes during the learning curve — which are real, measurable, and typically run hundreds to thousands of dollars in wasted ad spend.

Most HVAC owners who try to manage their own marketing either:

Spend too little time on it, producing poor results
Spend too much time on it, pulling attention from running their business
Give up and do nothing, which costs them the most in the long run

Hired marketing has a real cost. DIY marketing has a real cost too — it’s just less visible because it’s measured in time and missed revenue rather than invoices.

What Budget Is Right for Your Business?

There’s no universal answer, but here’s a framework:

If you’re under $500K revenue: Start with $1,500–$2,000/month. Focus on Google Ads and Google Business Profile — the highest-ROI channels. Add review generation. Hold off on content until you have capacity.

$500K–$2M revenue: $2,500–$4,000/month all-in. Add a proper website and systematic content. You should be generating 15–30 leads/month from marketing at this level.

$2M+ revenue: $4,000–$8,000/month. At this scale, organic search starts producing meaningful volume. Case studies and content become conversion tools. You need reporting that shows you exactly where customers are coming from and what they’re worth.

In every case, the question isn’t “how much can I afford to spend?” It’s “how much does a new customer cost me, and is that cost justified by what that customer is worth?” If the math works — and in HVAC, it usually does — spend more, not less.

One More Number to Keep in Mind

Most HVAC companies that are serious about growth are running marketing at a cost that produces a 3:1 return or better on ad spend (not counting the lifetime value multiplier from repeat business and referrals). That means for every $1 spent on marketing, they’re getting $3 or more back in new revenue.

3:1 is a reasonable minimum target. The best-run HVAC marketing programs produce 5:1 to 10:1 on ad spend — especially once reviews, organic search, and reputation start doing passive work alongside paid campaigns.

If you’re spending marketing dollars and can’t tell you what your return is, that’s the first problem to fix. Not more spend — better attribution. You should know, every month, exactly how many leads came from each channel and what those leads turned into.

If you’d rather have this figured out for you, with budget, channels, targeting, and reporting handled, see what’s included in the retainer or request a fit review with your market and current spend.