Start With Revenue, Not a Round Number
Forget the number you saw in a forum post. The right starting point is three numbers you already know about your own business:
- Average order or job value — what does a typical sale put in your pocket?
- Close rate — of the leads or calls you get, how many turn into paying customers?
- Target cost per acquisition (CPA) — what are you willing to pay to win one customer, while still making a healthy margin?
Say your average job is worth $1,200 and you close one in four leads. That means each lead is worth roughly $300 to you before costs. If a reasonable CPA target is $150, you can afford to pay up to $150 for each lead the campaign generates and still profit. Multiply that by how many new customers you want per month, and you've got a real budget — not a guess.
How Much Should You Spend on Google Ads by Business Size
Budgets vary enormously by industry and competition, but here's a rough starting shape for a single-location small business:
- Tight local market, low competition (a niche trade, a specific service in a smaller city): $500–$1,000/month can generate meaningful clicks and a handful of qualified leads.
- Competitive local market (home services, legal, dental — anything with several agencies bidding the same terms): $1,500–$3,000/month is closer to a realistic floor.
- Regional or multi-location businesses: $3,000–$8,000+/month, since you're running multiple campaigns across service areas at once.
These are starting ranges, not ceilings. The real test isn't the dollar figure — it's whether your budget buys enough clicks per day to let Google's bidding system actually learn which searches convert. A campaign capped at two or three clicks a day will limp along indefinitely regardless of how well it's built.
How to Know If You're Spending Enough on Google Ads
You're under-spending if any of these are true:
- Your campaign is "budget limited" more than a few days a week (Google Ads flags this directly in the campaign status).
- You're getting fewer than 10 clicks a day on your core keywords.
- You keep pausing and restarting the campaign to manage cash flow — every restart resets some of what the algorithm has learned.
You're spending enough once a campaign runs uninterrupted for four to six weeks, generates a steady daily click volume, and you can look at the numbers and say plainly which keywords are producing customers and which aren't. That clarity is the actual goal — not a specific dollar amount.
Signs You're Wasting Budget, Not Under-Spending
Not every disappointing result means "spend more." Sometimes the problem is where the money's going, not how much of it there is:
Broad match keywords eating the budget on irrelevant searches. A plumber bidding on "plumber" broad match will pay for clicks from people searching "how to become a plumber" or "plumber salary." Tight match types and a real negative keyword list fix this before you touch the budget slider.
A landing page that doesn't match the ad. Imagine a roofer running an ad for "emergency roof repair" that sends clicks to a generic homepage. Increasing spend into a page that doesn't convert just multiplies the waste.
No conversion tracking. If you can't see which clicks turned into calls, forms, or sales, you're managing a budget blind. Fix tracking before raising spend — otherwise you're just guessing at a bigger number.
According to LocalIQ's 2026 Search Advertising Benchmarks report, the average Google Ads cost per click across industries is $5.42 — but it ranges from $1.63 in Arts & Entertainment up to $9.87 for Attorneys & Legal Services, roughly a six-fold spread. That's exactly why a flat "spend $X" rule of thumb from a blog post never fits every business. Your real number has to come from your own margins and your own market's click costs.
