Most answers to this question are a shrug wrapped in a range — “it depends, but somewhere between $1,000 and $10,000.” That’s true and useless. Here is the version with numbers in it, including the ones that argue against spending more.
How much should a small business spend on Google Ads per month?
Work backwards from leads, not forwards from budget. The average cost per lead across all industries is $66.69, so if you need 15 qualified leads a month, you’re looking at roughly $1,000 in ad spend before management. The practical floor is whatever buys you 20 to 30 conversions a month — below that, Google’s system has too little data to optimise and you’re paying to learn very slowly.
That’s the whole framework. The rest of this is how to make those numbers real for your business rather than the average one.
What do Google Ads actually cost in 2026?
Three benchmark numbers worth knowing, all from WordStream’s 2026 analysis:
- Average cost per click: $5.42
- Average conversion rate: 8.18%
- Average cost per lead: $66.69
The spread underneath those averages is enormous. Arts and entertainment averages $1.63 a click and $26.84 a lead. Attorneys and legal services average $9.87 a click and $131.63 a lead — roughly five times as much for the same conversion.
So the honest answer to “what will this cost me” depends far more on what you sell than on how much you’re willing to spend. A law firm and a landscaper with identical $2,000 budgets are running completely different experiments.
Run the arithmetic for yourself: your target leads per month × your industry’s cost per lead = your starting ad budget. Then sanity-check it against the 20–30 conversion floor. If the two disagree, the floor wins — a budget that can’t produce enough data can’t be optimised, and an unoptimised account stays expensive.
Is $500 a month enough?
Sometimes, and it depends on how narrow you’re willing to be. At the $66.69 average, $500 buys roughly seven leads a month. That’s below the threshold where the system learns quickly, which means slow improvement and a longer stretch of paying above the odds.
If $500 is genuinely the ceiling, the fix isn’t a bigger budget — it’s a smaller target. Pick one service and one tight geography and dominate it. Spending $500 across a whole metro and five service lines guarantees you’re invisible in all of them.
Does a bigger budget mean better results?
Not reliably, and this is the part most agencies won’t tell you: execution moves cost per lead far more than budget does.
One example from our own accounts, a home-care agency in Phoenix. Their budget didn’t change — roughly $790 a month before and after. What changed was the account structure, targeting, and tracking. Cost per lead went from $20–26 down to $2–6, and inquiries rose several times over on the same money.
That’s the case for fixing the account before raising the budget. Doubling spend on a poorly structured account doubles what you pay for the same problems.
At the other end of the scale, a waste-hauling company in DFW has run 13,278 leads at $16.76 each over twelve months while tripling spend — proof that scale doesn’t have to wreck efficiency, if the foundation is right. Across everything we manage, that’s part of $13M+ in ad spend, and the pattern is consistent: the accounts that improve are the ones where somebody fixed the structure, not the ones that simply spent more.
Should contractors use Google Ads or Local Services Ads?
Usually both, and usually LSAs first.
Local Services Ads are pay per lead, not per click, and they appear above regular search ads. Benchmark data covering $6.72M in spend across 888 contractors and 126,650 leads in early 2026 puts the blended cost at $53 a lead (SearchLight):
| Trade | Cost per lead |
|---|---|
| Electrical | $39 |
| HVAC | $51 |
| General / all trades | $54 |
| Plumbing | $57 |
| Drain / sewer | $59 |
| Water heater | $71 |
Paying per lead rather than per click removes a lot of the risk, which is why LSAs are usually the first dollar spent. But they only cover eligible categories and fairly generic intent. Google Ads picks up everything LSAs can’t serve — specific services, brand defence, competitor terms, and anything outside the trade categories.
Most contractors we work with run Local Services Ads for baseline lead flow and Google Ads for everything around the edges.
What about the management fee?
Budget for it separately, and make sure the ad spend goes straight to Google on your own billing rather than through an agency. That way you can see exactly what was spent, you keep the account and its history if the relationship ends, and nobody has a reason to encourage spending the account can’t productively use.
Our own ads management starts at $599/mo with spend never marked up. Whoever you use, the structure matters more than the number: if you can’t log in and see the spend yourself, ask why.
So what should you actually budget?
Three steps, in order.
- Find your industry’s cost per lead — the $66.69 average is a starting point, not your number.
- Multiply by the leads you need to hit a revenue target you’ve actually written down.
- Check it against the 20–30 conversion floor. If your budget can’t clear it, narrow the targeting until it can.
And before you increase spend on an account that’s already running, get someone to look at the structure. The Phoenix example above is the norm, not the exception — most underperforming accounts are badly built rather than underfunded.
If you’d like a straight read on which of those two yours is, book a call. If the answer is that your budget is fine and the account just needs fixing, we’ll say so.