Your HVAC Google Ads budget is the output of four numbers you already have: how many new customers you want each month, what share of leads your team closes, what a lead costs in your market, and what an average job is worth. Run those four and most residential HVAC companies land between $2,000 and $25,000 a month. That is a wide range, and that is the point. The number is set by your market and your close rate, not by a percentage of revenue somebody quoted you over the phone.
Below is the math, the 2026 HVAC benchmarks to pressure test it against, and how to tell the difference between a budget that is genuinely too small and one that is being spent badly.
How do you calculate an HVAC Google Ads budget?
Two steps, and neither one requires a spreadsheet. Start with the number of new customers you want each month. Divide that by your close rate to get the number of leads you need. Then multiply the leads by your cost per lead. That is your monthly ad spend.
A worked example
- You want 20 new customers a month.
- Your team closes 50% of the leads it gets, so you need 40 leads.
- At $128 per lead, the current median for air conditioning installation and repair, that is about $5,120 a month.
- At $177 per lead, the July 2026 median for unbranded search, those same 20 customers cost about $7,080 a month.
Two different answers from the same goal, and the gap between them is the most important thing in this article. More on that in the next section.
Before you trust either number, be honest about where your inputs came from. In our years managing campaigns for HVAC companies, the two numbers owners are least sure about are the two that matter most here. Close rate is not the percentage of quotes you win. It is the percentage of leads that turn into paid work, and it includes every call the office missed at 4:50 on a Friday. Pull it from your field service software, not from memory. Cost per lead has to come from call tracking with dynamic number insertion feeding back into Google Ads, because otherwise you are counting form fills and ignoring the phone. In this trade the phone is most of the volume.
If you cannot produce those two numbers today, that is the first project. A budget built on guessed inputs is still a guess, just with more decimal places.
What do HVAC Google Ads actually cost in 2026?
Here is where most budget conversations go wrong. Contractors compare their cost per lead to a number they saw online without checking whether it describes the same thing.
Across roughly 600 HVAC businesses and $28.4 million in tracked Google Ads spend from May through July 2026, SearchLight platform data reported by The Data-Driven Trades shows a blended return of about 7x ad spend at a $107 cost per lead. That sounds excellent, and it is, but the blend hides the real story. Branded search, meaning people typing your company name, returned about 27x ad spend at a $36 cost per lead with a 66% booking rate. Unbranded search, meaning homeowners who have never heard of you, returned 3.68x ad spend in July at roughly $177 per lead. In June it was 4.06x at $184.56.
The split matters more than either figure alone. Branded search took about 10$ of total spend and produced 41% of the revenue. Those are people who already decided to call you. Cheap to reach, easy to book, and largely earned by your reviews, your trucks, and your years in the market rather than by your ad budget.
So when a contractor says their Google Ads bring in 8x what they spend, the honest follow up is: how much of that is your own name? Strip out branded and the new customer acquisition number is usually closer to 3 or 4x. That is still a good business. It is just a different one, and it is the number your growth budget actually buys.
One useful figure falls out of that data. At $177 per lead and 3.68x return, each unbranded lead is worth roughly $650 in closed revenue. Hold your own numbers against that. If your leads cost $180 and produce $300, the problem is not the budget.
For context on the cost side, median cost per click across home services search sits near $8, and air conditioning installation and repair runs closer to $9.68 with a conversion rate around 6.5%, according to LocaliQ and WordStream benchmark data covering 3,211 home services campaigns. Roughly 15 clicks per lead is the arithmetic behind a $128 cost per lead. That is also why a weak landing page is so expensive. Move conversion from 5% to 8% and your cost per lead drops by more than a third on the same spend, which is why HVAC website design belongs in a budget conversation at all.
How much should an HVAC company spend on Google Ads per month?
The ranges below are calculated, not surveyed. Each one runs the formula above at that market’s typical cost per lead, assuming a 50% close rate.
| MARKET | COST PER LEAD | NEW CUSTOMERS | MONTHLY BUDGET |
|---|---|---|---|
| Smaller or less competitive | $80 to $130 | 10 to 15 | $2,000 to $4,000 |
| Midsized metro | $130 to $180 | 20 to 30 | $5,000 to $11,000 |
| Highly competitive metro | $175 to $250 | 30 to 50 | $10,000 to $25,000 |
Change any input and the range moves. Close at 30% instead of 50 and every number nearly doubles. Sell $9,000 systems instead of $400 repairs and you can afford a cost per lead that would bankrupt a service only shop. Run in a metro with three private equity backed competitors and you are at the top of the range whether you like it or not.
Two mechanics are worth knowing before you set a daily number. Google Ads spends against an average daily budget, and according to Google Ads Help it can spend up to twice that amount on a given day while capping the month at 30.4x the daily figure. And if pay per click math looks tight in your market, Local Services Ads charge per lead rather than per click, which changes the calculation. Google Local Services Ads Help states that you pay only for leads related to the services you offer, and that a business has to pass Google’s screening, which includes license or business registration verification, before the verified badge appears.
Is your budget too low, or is it being mismanaged?
These get confused constantly, and the fix for one makes the other worse.
There is one honest test for too low. In Google Ads, look at Search lost impression share (budget), which Google defines as the percentage of time your ads were not shown because of insufficient budget. If that number is significant during your peak demand hours, and the campaign is otherwise converting at a reasonable cost per lead, you are leaving booked jobs on the table and more money will buy more of them. A campaign that runs dry by midday during the first heat wave of the year is the clearest version of this. Homeowners are searching, you are absent, and a competitor answers.
Mismanagement looks different. Cost per lead well above your market’s median, a search terms report full of “HVAC school near me” and “furnace parts,” no negative keyword list, clicks landing on a homepage instead of a service page, conversion tracking that counts page views rather than calls. A bigger budget will not fix any of that. It will spend faster on the same wrong searches. We have seen accounts burn through $10,000 a month as easily as $2,000 when the structure is broken, which is the whole argument of our breakdown of why home service ads fail.
The tell is simple. If your cost per lead is near or below your market’s median and you are losing impressions to budget, spend more. If your cost per lead is double the median, spend the same money better first. And if you are paying an agency and cannot get a straight answer about which campaigns produced booked revenue rather than clicks, that is worth asking your PPC agency about directly.
What it looks like when spend scales and lead quality holds
Fiscor Plumbing and Air came to us in a familiar spot. Lead flow was inconsistent, and there was no reliable read on which channel produced work or what each lead actually cost. That is the position most owners are in when they ask how much to spend, and it is why the question cannot be answered first. There was nothing solid to calculate against.
Attribution went in before the budget moved. Every lead got tied to a source, calls were tracked and scored, and revenue was matched back to the campaign that produced it through SearchLight, the attribution platform we partner with. Only then did the paid program get rebuilt and scaled.
Over six months, paid leads grew from 499 to 1,841, close to four times the volume, with 1,155 additional paid leads in the first four months of 2026 alone. The number worth watching is the one that usually falls apart at that pace: the quotable lead rate held at roughly 48%. Organic traffic conversion improved 47% alongside it. The full numbers are in the Fiscor case study. Volume nearly quadrupling without lead quality collapsing is what a budget increase is supposed to look like, and it is only possible when the measurement is in place first.
Where to start
Do not set a budget this week. Pull your close rate and your true cost per lead first, then run the arithmetic at the top of this article. If the answer is uncomfortably larger than what you spend now, you have found your growth constraint. If it is smaller, you are probably paying for the wrong searches.
If you want another set of eyes before you change the number, our team at Lokal Media House does this daily for HVAC companies. Take a look at how we approach PPC for HVAC companies, or send us the account and we will tell you honestly whether the budget is the problem.
Frequently Asked Questions
In a smaller or less competitive market, $3,000 can reasonably produce 15 to 25 leads a month at typical HVAC costs per lead. In a competitive metro at $180 or more per lead, it buys closer to 16 leads, which may be too little data for Smart Bidding to optimize well.
Recent benchmarks put the median around $107 blended and roughly $177 for unbranded search that reaches new customers. Anything meaningfully above your market median usually points to campaign structure or landing page problems rather than to your budget.
Across roughly 600 HVAC accounts tracked from May through July 2026, blended return was about 7x ad spend, with unbranded search at 3.68x and branded search near 27x. Judge new customer growth on the unbranded number, since the blended figure is lifted by people already searching your name.
Usually yes, with one caution: a large share of those leads would have reached you anyway through your organic listing or Google Business Profile, so branded revenue is attributed, not incremental. Branded search took about 10% of HVAC ad spend and produced 41% of the revenue at a $36 cost per lead, but the only honest test is to pause it for a few weeks and watch whether total booked jobs actually drop.
Expect 30 to 60 days before performance data is stable enough to judge, longer if the campaign was recently restructured, because bidding needs conversion volume to learn. Seasonal demand swings can distort anything shorter than a full month.
About Lokal Media House
Lokal Media House is a home services marketing agency that has built and managed paid campaigns for contractors for more than ten years. We are a Google Partner, a Top 5 Yelp Platinum Partner, and a ServiceTitan Certified Marketer, with account strategists certified across Search, Display, Video, Shopping, and Apps, and we partner with SearchLight for call and revenue attribution. Every benchmark in this article is sourced and every client figure reflects documented results.
Citations and References
- Google Ads Help, About average daily budgets: https://support.google.com/google-ads/answer/6385083
- Google Ads Help, Get impression share data, including Search lost impression share (budget): https://support.google.com/google-ads/answer/7103314
- Google Local Services Ads Help, Get started with Local Services Ads: https://support.google.com/localservices/answer/6224841
- The Data-Driven Trades, 3.68x ROAS on Unbranded HVAC Google Ads, July 2026, using SearchLight platform data across roughly 600 HVAC Google Ads accounts and $28.4 million in spend from May through July 2026: https://thedatadriventrades.substack.com/p/368x-roas-on-unbranded-hvac-google
- LocaliQ and WordStream, Home Services Search Advertising Benchmarks, 3,211 United States home services search campaigns, April 2024 through March 2025. Median cost per click, conversion rate, and cost per lead for air conditioning installation and repair: https://localiq.com/blog/home-services-search-advertising-benchmarks/
- Lokal Media House, Fiscor Plumbing and Air case study: https://lmh.agency/plumbing-hvac-marketing-arizona-fiscor-case-study/
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