What Google Ads really costs in 2026 (with real numbers by industry)

Average cost per click across all industries sits in the $2 to $5 range in 2026, but the spread by sector is enormous and the average is close to useless on its own. Attorneys and legal services average $9.87 per click. Home and home improvement averages $8.33. Dentists and dental services average $8.00. Lower-competition sectors such as arts and entertainment or real estate frequently sit under $2. The variable driving the difference is not Google's pricing but the value of a customer: in sectors where one converted client is worth five figures, advertisers bid clicks up until the economics stop working, and that ceiling is far higher for a personal injury firm than for a hair salon.

Cost per lead in 2026 ranges from roughly $29 in auto repair to $132 in legal services, with most service businesses landing between $30 and $80. Dental practices typically pay $20 to $80 per booked appointment. Home services generally run $30 to $80 per lead, with emergency categories such as plumbing and locksmith work converting at higher rates because intent is urgent. Legal sits highest at $50 to $200 or more depending on practice area. The number that matters is not the benchmark, though — it is your cost per lead against what a closed client is worth to you. A $130 lead is excellent if one in three becomes a £4,000 client, and catastrophic if one in twenty becomes a £200 job.

The practical minimum is your sector's cost per lead multiplied by 20 to 30 leads per month, because that is the volume Smart Bidding needs before it can optimise. Google recommends a minimum of 15 conversions in 30 days for Smart Bidding to function and 30 or more per campaign per month for stable results; target CPA bidding specifically wants around 30 conversions in 30 days and target ROAS around 50. For a home services business at a $50 cost per lead, that puts the working floor near $1,000 to $1,500 per month. For a law firm at $130 per lead, the same maths gives $2,600 to $3,900. Below that threshold the algorithm never accumulates enough signal, performance stays volatile, and adding months does not fix it.

Agency management fees for Google Ads typically run either 10% to 20% of ad spend, or a flat monthly retainer between £500 and £2,500 for a small to mid-sized service business. Percentage-of-spend pricing contains an obvious conflict of interest: the agency earns more when you spend more, whether or not spending more is right for you. Flat retainers remove that specific incentive but introduce another, since a fixed fee rewards the agency for spending as little time as possible on your account. Neither model is inherently dishonest, but you should know which one you are on and what it rewards. Ask any agency directly what happens to their fee if they recommend cutting your budget in half.

In the accounts we audit, 20% to 40% of spend is routinely going to searches that will never produce a customer. The usual culprits are consistent: Search Partners left enabled without anyone checking its separate performance, broad match keywords running without a negative keyword list, traffic pointed at a homepage instead of a relevant landing page, and conversion tracking that counts page views or button clicks rather than genuine enquiries. None of these are exotic problems. They are default settings that nobody revisited. The first thing worth doing on any account older than three months is opening the search terms report and reading what people actually typed before they clicked — it is usually an uncomfortable ten minutes.