The 10-20% Rule That Separates Growing HVAC Companies from Stagnant Ones

HVAC companies that invest 10% to 20% of gross revenue in marketing grow an average of 25% per year. Companies that spend less than 5% grow at 3% or less. The difference compounds fast. After five years, the aggressive marketer is three times the size of the conservative one.

But here is the thing. It is not just about how much you spend. It is about where you spend it. Jason, who runs a 12-tech HVAC company in Dallas, spent $6,500/month on marketing in 2024. His cost per acquired customer was $312. His competitor across town spent $4,200/month and had a cost per customer of $189. Same market, same services, wildly different results.

The difference was allocation. Jason was dumping 70% of his budget into Google Ads. His competitor split it: 40% Google Ads, 25% Google Business Profile and SEO, 20% referral program, 15% email marketing to past customers.

How Much Should HVAC Companies Spend on Marketing?

The 10-20% rule is a guideline, not a law. Where you fall in that range depends on your growth goals and your market.

If you are a new HVAC company trying to establish a presence, invest closer to 20%. You need to build awareness, accumulate reviews, and create a pipeline from scratch. The upfront investment is higher because you are building assets that will pay off for years.

If you are an established company with a solid reputation and steady referral flow, 10% to 12% is usually sufficient to maintain growth. Your existing brand does a lot of the heavy lifting, so your marketing dollars go further.

For a company doing $1 million in annual revenue, that means a marketing budget of $100,000 to $200,000 per year, or roughly $8,300 to $16,700 per month. That sounds like a lot until you realize that a single new maintenance agreement customer is worth $3,500 to $7,000 over their lifetime.

Kevin, an HVAC owner in Phoenix, calculated his customer lifetime value at $4,800. He was spending $175 per acquired customer. That is a 27x return on investment. Once he saw those numbers, increasing his marketing budget from 8% to 15% was an easy decision.

What Marketing Channels Work Best for HVAC Companies?

The highest-ROI channels for HVAC companies follow a predictable pattern. Google Business Profile and local SEO deliver the best long-term returns. Paid search (Google Ads) provides immediate lead flow. And email marketing to past customers generates the cheapest leads of all.

Google Business Profile should be the foundation. HVAC searches have strong local intent, and the Map Pack captures 44% of clicks. Optimize your profile with seasonal photos, respond to every review, and post weekly tips about maintenance, efficiency, and seasonal prep.

Google Ads work best for high-intent commercial keywords. Target terms like "AC repair near me" and "furnace replacement [city]." Avoid broad terms like "HVAC" which attract informational searches. Set a target cost per lead of $35 to $65 for residential and track your actual numbers monthly.

Email marketing to your existing customer base is the most overlooked channel. Twice-yearly maintenance reminders generate a 15% to 25% booking rate. A list of 500 past customers can produce 75 to 125 maintenance appointments from a single email, worth $7,500 to $15,000 in revenue.

Referral programs with a $50 incentive typically return 5 to 10 referrals per month for established companies. At a customer value of $4,800, that is $24,000 to $48,000 in lifetime value for $250 to $500 in referral bonuses.

How Fast Are the Top HVAC Companies Growing?

The top 10% of HVAC companies grow 20% to 35% year over year. The median company grows 5% to 8%. The bottom 25% are flat or declining.

Growth at the top is driven by three factors: consistent marketing investment, maintenance agreement programs, and systematic follow-up on every lead.

Maintenance agreements are the secret weapon. A company with 500 maintenance agreements has a predictable $100,000+ in annual recurring revenue before a single new lead comes in. That stability allows them to invest more aggressively in growth, hire better techs, and take the market share that smaller competitors cannot afford to chase.

The result? The gap between growing companies and stagnant ones widens every year. The companies investing 15% of revenue in marketing today will be twice the size of their conservative competitors in three years.

Why Seasonal HVAC Marketing Fails Without a Year-Round Strategy

Most HVAC companies crank up marketing in summer and winter, then go quiet in spring and fall. This creates a feast-or-famine cycle that is expensive and stressful.

The cost per click for "AC repair" in July is 2 to 3 times higher than in April. Everyone is bidding on the same keywords at the same time. By the time demand peaks, you are paying premium prices for leads that are harder to close because every HVAC company in town is competing for them.

Smart HVAC companies market year-round with seasonal adjustments. In spring, promote AC tune-ups and efficiency checks. In fall, push furnace inspections and filter changes. These shoulder-season campaigns cost less and build the maintenance agreement base that sustains you through slow periods.

Lisa, who runs a 6-tech operation in Atlanta, shifted 30% of her summer ad budget to spring shoulder-season campaigns. Her annual marketing cost dropped 18% while her total revenue increased 12%. The spring campaigns filled her schedule with maintenance work that converted to replacement sales when techs found aging equipment during inspections.

Frequently Asked Questions

How much should an HVAC company spend on marketing?

Invest 10% to 20% of gross revenue. New companies should lean toward 20% to build brand awareness and reviews. Established companies with strong referral networks can maintain growth at 10% to 12%. For a $1M company, that is $8,300 to $16,700 per month.

What is a good growth rate for an HVAC company?

The industry median is 5% to 8% annual growth. Top performers grow 20% to 35% per year, driven by consistent marketing investment, maintenance agreement programs, and systematic lead follow-up. Companies growing below 5% are typically underinvesting in marketing.

Which marketing channels have the best ROI for HVAC?

Email marketing to past customers delivers the highest ROI (nearly free leads). Google Business Profile optimization and local SEO provide the best long-term returns. Google Ads offer immediate lead flow at $35 to $65 per lead. Referral programs with $50 incentives generate leads at the lowest cost per acquisition.

Should HVAC companies market during the off-season?

Absolutely. Shoulder-season marketing (spring and fall) costs 40% to 60% less per lead than peak-season campaigns. Promoting tune-ups and maintenance during these periods fills your schedule, builds your maintenance agreement base, and reduces the feast-or-famine cycle.

Related reading: