Google Ads for small business: what the data shows

What Google Ads data looks like at small budgets

WordStream analysed 15,666 Google Ads accounts across the first eleven months of 2025. The average account spent $3,127 per month. Of that, $1,128 went to clicks that did not convert. That is roughly a third of the budget producing no measurable return.

29% of accounts in the study recorded zero conversions over a 90-day period. Not low conversions. None.

Those numbers are averages across a large sample. They include well-managed accounts and neglected ones. But they paint a useful baseline: waste is common, and the median account is not performing well.

One finding from the same study that tends to get less attention: accounts spending under $1,000 per month converted 32% better than those spending over $10,000. Smaller accounts are not inherently disadvantaged. They often have tighter targeting and fewer wasted keywords simply because there is less room to be careless.

Where the budget tends to go

The 2025 Google Ads benchmarks (16,446 US search campaigns, April 2024 to March 2025) put the overall average cost per click at $5.26, with a 6.66% click-through rate and a 7.52% conversion rate.

Those averages mask significant variation by industry. Arts and entertainment advertisers pay around $1.60 per click. Legal services pay $8.58. Automotive repair converts at nearly 15%. Finance and insurance converts below 3%.

For a small business, the question is not whether these averages apply to you. They probably do not. The question is whether you know your own numbers. A £500-per-month budget at $5 per click buys roughly 100 clicks. At a 7% conversion rate, that is 7 conversions per month. Whether that is good depends entirely on what a conversion is worth to the business.

This is where business context becomes the deciding factor. A law firm converting 7 leads per month at £500 ad spend is in a different position from a candle shop converting 7 orders at the same cost. The platform does not make this distinction. You have to.

How automation behaves at small scale

Google's automated bidding strategies (Smart Bidding, Performance Max) rely on conversion data to learn. Google's own guidance suggests 30 to 50 conversions per month for the algorithm to optimise effectively.

For accounts generating fewer conversions than that, the algorithm is working with insufficient signal. It may overspend on broad placements while it searches for patterns that are not there yet.

Performance Max, which now serves over a million advertisers, has drawn particular criticism for its opacity. Search term visibility and placement-level reporting were limited at launch, making it difficult for smaller advertisers to see where their money was going. Google has since added search term reports and campaign-level negative keywords, but the fundamental dynamic remains: the algorithm needs data to learn, and small accounts generate less of it.

Manual CPC or Maximise Clicks with a bid cap tends to be more predictable at smaller budgets. It gives up some of the algorithmic upside, but it makes spend more legible.

What is worth doing first

The most common mistake is launching campaigns before understanding the market. Keyword research shows how many people search for what you sell, what language they use, and how competitive the space is. That information is available before you spend anything.

A few things that tend to be worth doing early:

• Start with exact and phrase match. Broad match gives the algorithm more room to find queries you did not intend. At small budgets, that room is expensive. Tighter match types keep spend on the queries you actually researched.
• Add negative keywords from day one. The WordStream study found that accounts using negative keywords had roughly three times higher conversion efficiency. This is the single highest-leverage action for a new account.
• Check the search term report weekly. The search term report shows the actual queries people typed before clicking your ad. It surfaces irrelevant traffic, competitor terms, and queries worth adding as explicit keywords. Reading it regularly prevents budget leaking to terms you would never have chosen.
• Make sure the landing page matches the ad. Google's Quality Score factors in landing page relevance. An ad promising "free consultation" that links to a generic homepage pays more per click and converts less. The page the visitor lands on should deliver what the ad offered.
• Watch for cannibalisation. If you are running both Search and Shopping campaigns, the same query can appear in both. A term that looks untargeted in one campaign may already be covered in another. Cross-referencing across campaigns catches this before you add duplicates.

How to know if it is working

The metrics that matter at small budgets are simpler than they appear.

Cost per conversion is the number to watch. If a conversion (a lead, a sale, a booking) costs less than the profit it generates, the campaign is working. Everything else is context.

Click-through rate tells you whether the ad copy resonates with the query. The 2025 benchmark is 6.66%. Below 3-4% usually signals a mismatch between what someone searched for and what the ad says.

Impression share tells you how often your ad appeared relative to how often it could have. If you are losing impression share to budget, you are missing eligible searches. If you are losing it to rank, your bids or Quality Score need attention.

Thirty days of data is usually the minimum needed to draw conclusions. Before that, the sample is too thin. If the account is converting, optimise around what is working. If it is not converting after 60 days with reasonable spend, the problem is more likely targeting or landing page quality than budget.