Summary: A practical Google Ads budget for a local service business usually starts between $1,500 and $5,000 per month, but the right number depends on your average ticket, your local cost-per-click, and how many calls you need to close one job. This article walks through a simple way to calculate your floor (the minimum spend needed to gather useful data) and your ceiling (where returns flatten). You will also learn the three budget mistakes that quietly burn 30 to 40 percent of most local accounts.
Every week a contractor or shop owner asks the same question. What should I be spending on Google Ads? The honest answer is that there is no industry sticker price. A $750 monthly budget is fine for a single-zip lawn care company in a quiet market. The same $750 will not buy a single legitimate lead for an HVAC company in metro Atlanta. Budget is a math problem, not a vibe. Here is how to do the math.
Start with your real cost-per-click
Before you set a budget, you need to know what a click actually costs in your category and your city. The cheapest local-service clicks, like lawn care or handyman work in smaller markets, run $3 to $6. Mid-tier categories such as plumbing, electrical, and auto repair tend to land between $8 and $20. The most competitive verticals (water damage restoration, HVAC in summer, personal injury law, garage door) routinely bid $35 to $90 per click and sometimes more during peak season.
You can pull a real number from the Google Ads Keyword Planner in about fifteen minutes. Take the top five keywords you would want to show for, look at the Top of page bid (high range), and use the average. That number is your starting CPC assumption.
Figure out how many clicks become a customer
A healthy local Google Ads campaign converts somewhere between 5 percent and 15 percent of clicks into a phone call, form, or chat. For a well-built campaign with a fast landing page, call assets, and tight targeting, 10 percent is a fair target.
Of those calls, most local service businesses close between 25 percent and 60 percent into paying customers, depending on how quickly they answer the phone and how good their booking process is. A typical funnel looks like: 100 clicks, 10 calls, 3 to 5 jobs. If your average job is worth $400, those five jobs are $2,000 in revenue from 100 clicks. At a $10 CPC, you spent $1,000 to make $2,000. That is the math you are working backwards from.
Calculate your budget floor
The floor is the smallest budget that will actually give you data instead of noise. A useful rule: you need at least 30 to 50 conversions in a calendar month before Google’s bidding algorithm has enough signal to optimize. At a 10 percent conversion rate, that is 300 to 500 clicks. Multiply by your CPC.
A plumber in a $15 CPC market needs roughly $4,500 to $7,500 a month to gather real data. A handyman in a $4 CPC market can get the same signal at $1,200 to $2,000. If you spend less than your floor, you are not testing Google Ads. You are paying for a coin flip.
Set your ceiling where returns flatten
There is also a ceiling. As you raise your daily budget, Google has to show your ads to lower-intent searches and more expensive auctions. Most local accounts hit diminishing returns somewhere between two and four times the floor. Past that, you are paying more per lead without proportionally more revenue. Start at your floor, watch your cost-per-lead and booking rate for 60 days, and then raise the budget in 20 percent increments only when the unit economics still work.
The three mistakes that quietly waste budget
First, no negative keyword list. Without it, you will pay for clicks on free, DIY, jobs, and salary searches. Adding a basic negative list often saves 15 to 25 percent of spend in week one.
Second, sending traffic to the homepage instead of a dedicated landing page. Homepages convert at 1 to 3 percent. Real landing pages built for a single offer regularly do 8 to 15 percent. Same budget, three to five times the leads.
Third, leaving Performance Max or Smart campaigns on default. The defaults serve traffic Google wants you to serve, not necessarily the traffic that pays. Switching to a tight search campaign with manual or Target CPA bidding is often the biggest single budget unlock.
A right-sized Google Ads budget is the budget that funds at least 30 to 50 conversions a month at a cost-per-lead you can profitably pay. Use Keyword Planner to estimate your real CPC, work the funnel math backwards from your average job value, and start at the floor before you scale. Reach out to Aragon Group if you want a second set of eyes on the numbers before you commit.
Frequently Asked Questions
Is $500 a month enough to try Google Ads?
In most local service categories, no. $500 a month gets you about 50 to 100 clicks, which is not enough volume for the algorithm to optimize or for you to draw any conclusion. Save up for a real test, or pick a single long-tail keyword and run only that.
Should I include the agency fee in my ad budget?
Keep them separate. Your ad budget is what Google bills you. Your management fee is what you pay someone to run it. Mixing them together makes it hard to tell whether the ads are working or whether you are just paying a manager.
How long should I commit to a budget before I judge it?
Sixty to ninety days. The first thirty are data collection, the next thirty are optimization. If your cost-per-lead has not stabilized by day sixty, something structural is wrong, usually with the landing page or the offer, not the budget itself.
Does my budget need to rise in busy seasons?
Yes, if you want to keep your impression share. CPCs rise 30 to 80 percent in peak season for most home-service categories. Plan for a 25 to 50 percent seasonal lift, or accept that you will be invisible during the months that matter most.
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