Ten dollars a day sounds like a careful way to try Google Ads. It comes to about $300 a month, and at the home services median that buys roughly three leads. Nobody can judge a campaign on three leads, so the test ends with a shrug and the conclusion that ads don’t work for you.
They might not. But the real work of setting a Google Ads budget for a local business is arithmetic. You need three numbers: what a lead costs in your trade, how many leads it takes to book a job, and how many jobs you want.
What a lead costs in your trade
Start with the going rate, because it varies more than most owners expect.
LocaliQ’s 2025 Search Ad Benchmarks for Home Services put the median cost per lead across home services at $90.92. Plumbing sat above that. Air conditioning installation and repair came in at $127.74, and roofing and gutters at $228.15. The U.S. search campaigns ran from April 2024 through March 2025 and the figures are medians, so half of them paid more.
Treat those as a reference point, not a forecast for a plumber in Warrington or a roofer in Bethlehem. If you’ve run ads before, your own history beats any benchmark. Take what you spent over the last 90 days, divide by the real inquiries it produced, and you have your cost per lead.
Build the Google Ads budget for a local business from booked jobs
Most owners set a budget by asking what feels comfortable. We’d ask how many jobs the ads need to produce.
Say a heating and cooling company in Easton wants ten more jobs a month. The office books about one in three callers, so ten jobs takes roughly 30 leads. Borrow the $127.74 air conditioning median and 30 leads comes to about $3,830 a month. That’s an illustration built on a national benchmark. It’s not a quote.
Now hold it against what the jobs are worth. If they’re a mix of $600 repairs and a few installs worth several thousand dollars each, the jobs cover the spend several times over. If they’re $180 maintenance visits and you book one caller in five, the same math says ads are a poor fit for that service. That’s a finding too, and it’s cheaper to learn on paper.
So before picking a number, answer three questions:
- What is an average job worth for the service you’d advertise?
- How many callers turn into booked jobs?
- How many more jobs can the crew take each month without stretching?
Multiply the leads you need by a realistic cost per lead, and the budget has a reason behind it.
Hold the budget for 90 days
Whatever number the math gives you, it has to be one you can sustain for about three months. A new campaign spends its first weeks finding out which searches bring customers and which bring job seekers and people who wanted a how-to video. Cost per lead often doesn’t settle until that cleanup is done.
Is there a minimum worth starting at? Google doesn’t set one, but you can find yours. Ask how many leads a month you’d need before you could decide anything with confidence. If the answer is ten, the home services median puts that near $900 a month in ad spend, and roofing near $2,300. Those are hypothetical figures from national medians. Replace them with your own cost per lead as soon as you have one.
Sometimes the right number is more than cash flow can carry for a quarter. Then lower the target and keep the timeline. Aiming for five extra jobs over three months teaches you more than aiming for fifteen and shutting the ads off in week three. And whoever manages the account, your own evenings or a fee to someone else, is a cost on top of what you pay Google.
Stop the leaks before you spend more
Two accounts can spend the same amount and get very different results, depending on where the ads show and which searches trigger them.
Picture a plumber in Harleysville whose ads are reaching people in Center City Philadelphia, an hour away on a bad day. Every click is paid for and almost none can become a job. Match the targeted locations to the towns you really drive to, then check one setting. According to Google’s help page on advanced location options, the default, “Presence or interest,” reaches people in or regularly in your targeted locations and also people who have shown interest in them. “Presence” limits ads to people likely to be located, or regularly located, there. Google calls the default its recommended option. For a business that only works in a set of towns, we’d look hard at whether Presence fits better.
Negative keywords are the other leak. Every trade has searches that look relevant and aren’t: “free,” “DIY,” “jobs,” “salary,” “how to.” List them as negative keywords so your ads skip them. Build the list before launch, then read the search terms report weekly for the first month. That cleanup is a big part of our paid ads management work.
Superior Auto Tags and Insurance is an example of starting narrow. They had no online leads when they came to us. We built a new website for the auto tags side of the business, set up a hyper-local Google Ads campaign and worked on their local SEO. Their case study reports consistent leads from the campaign, the business showing up for local searches, and a consistent increase in customers. The campaign took 20 days to launch, which is setup time and says nothing about how long results take. It’s one client’s experience, and individual results vary.
Raise the budget only when the math holds
Adding budget to a campaign that produces $300 leads mostly produces more $300 leads. We’d want to see four things first: a cost per lead that’s been steady or falling for a couple of months, leads turning into the jobs you want, an account showing the daily budget runs out before the day does, and people with the hours to do the extra work. Then raise it in modest steps and wait a few weeks between them.
The wider market is worth knowing, though it shouldn’t set your budget. WordStream’s Google Ads Benchmarks 2026 reports the average cost per lead across industries fell to $66.69, the first drop in five years, and that conversion rates rose in most industries. Home and home improvement was still above that at $90.92. That describes a sample of U.S. campaigns. A falling average is not a reason to spend more. Your own cost per lead is.
Sometimes the numbers say budget isn’t the problem. Who answers when an ad call comes in? How fast does someone reply to a form? If the ad did its job and the call hit voicemail, a bigger budget buys more missed calls. We cover reply times in our article on how quickly you should respond to leads.
Ads also aren’t the only route. They can bring inquiries fairly soon and stop when the spending stops, while search visibility takes longer and keeps working. Our comparison of SEO vs Google Ads for contractors shows how they trade off, and our search engine marketing guide for local business explains how campaigns and keywords are organized.
Click prices are set in an auction and move with the season and with other advertisers. Nobody controls that, and we won’t name a number of leads for a set spend. What can be managed is where the money goes, what the ads say, and what happens after the click. That takes your side too: weekly attention to search terms in month one, a monthly half hour with cost per lead, booked jobs and missed calls, and word from you on which callers were a good fit. We can see clicks, calls and forms. We can’t see who booked unless you tell us.
Work out your number first
This week, pull your last 90 days of ad spend and count the inquiries you’d actually have wanted. Divide one by the other. It takes about fifteen minutes and costs nothing. If you haven’t run ads, write down your average job value and how many callers you book instead.
Then send us those numbers along with the jobs you’d like more of. We’ll run the math with you and tell you what we’d spend, and whether ads are the right step right now. Your first consultation is free.