Google Ads budget for a dental practice: how to work out yours

Most advice on a Google Ads budget gives you a number. For a dental practice that number is almost useless, because what a click costs and what a patient is worth both vary enormously between a market town and a London borough, and between a check-up and a set of implants. This guide shows you how to work out your own Google Ads budget from your own figures and Google's Keyword Planner, how Google actually spends a daily budget, and how to tell when to spend more or less.

What's a good budget for Google Ads?

A good budget is one where your cost of winning a new patient through ads is lower than what that patient is worth to you, and which is large enough to buy enough clicks in your area to learn something within a few months. Anything below that is a slow way to spend money without an answer. Anything above it, before you know your numbers, is a fast way.

To find that budget you need four numbers:

1. What a new patient is worth to you.
2. The most you are willing to pay to win one.
3. How many clicks it takes to produce one new patient.
4. What clicks cost for your searches in your area.

Step 1: what a new patient is worth to you

Start with your own records, not an industry figure. From your practice management software, take the new patients who joined in a recent twelve-month period and total the fees they generated in their first year. Divide by the number of patients. That is your first-year value per new patient.

Work it out separately for the groups you would advertise to. A private general patient, a plan patient, an implant patient and an NHS patient are worth very different amounts, and an ad campaign for implants should be judged against implant patients, not the practice average. For NHS work, use your own contract value rather than anyone else's. Our study of NHS dental contract values found contracts a mile apart are paid a median £3.15 per UDA apart, so a neighbour's figure is not yours.

Step 2: your allowable cost per new patient

Decide what share of that first-year value you are prepared to spend to win the patient. This is a business decision, not a formula. It depends on your margins, how long patients typically stay, whether the surgery time is otherwise empty, and how much you value growth this year. Write the figure down before you look at any click prices, so the market does not talk you into it.

This figure, the allowable cost per new patient, is the one that decides everything else. Our guide to Google Ads for dentists explains why it is the first calculation to do.

Step 3: how many clicks make one patient

Every click does not become a patient. Track the chain:

• Click to enquiry: the share of ad clicks that become a call, form or online booking. Google Ads conversion tracking measures this if it is set up properly.
• Enquiry to booking: the share of those enquiries your team turns into a booked appointment. Your reception records hold this.
• Booking to attendance: the share who actually turn up and become patients.

Multiply the three together and you have your click-to-patient rate. If you have never run ads, you do not have this number yet, and nobody else's figure is a safe substitute. The answer is a deliberately small test budget for a fixed period, with tracking working from day one, to measure it.

Step 4: what clicks cost in your area

Google's Keyword Planner, inside your Google Ads account, shows estimated monthly searches and costs for keywords in a location you choose. Set the location to your real catchment, not the whole UK, and enter the searches you would bid on, such as "dentist" plus your town or "dental implants" plus your town.

Two columns matter. Google defines top of page bid (low range) as roughly the 20th percentile of what advertisers have historically paid for a top-of-page position on that keyword, and top of page bid (high range) as roughly the 80th percentile, according to its Keyword Planner definitions. Note both for each keyword. Keyword Planner also gives forecasts of clicks and cost, which Google says take your bid, budget, seasonality and historical ad quality into account.

With cost-per-click bidding you pay for clicks, not for the ad being shown. Google's page on cost-per-click bidding says your maximum CPC is the most you will typically be charged for a click, and that you will often be charged less.

Putting it together: the budget calculation

This is the whole Google Ads budget calculator in five lines. Fill in your own figures from steps 1 to 4:

Then read the answers honestly:

• If the most you can afford per click is below Keyword Planner's low range, ads will struggle to pay back on those terms. Improve the conversion steps first, narrow to higher-value treatments, or accept that this channel is not right yet.
• If it sits between the low and high range, you can compete, but not for every search all the time. Start with your most valuable terms.
• If the clicks you need are more than the forecast says exist in your area, more budget will not create more patients. The search volume is the ceiling.

How Google spends your daily budget

The number you enter in Google Ads is an average daily budget, and Google treats it as an average over the month, not a hard daily cap. Its page on average daily budgets sets out two limits:

• On any single day, you can be charged up to two times your average daily budget, for most campaigns.
• In any month, you will not be charged more than 30.4 times your average daily budget, for most campaigns.

Google says it spends more on days when you are more likely to get clicks and conversions, so some days will be under budget and others over. That is why the daily figure is your monthly budget divided by 30.4.

Why did Google Ads charge me more than my daily budget?

Because the daily budget is an average. Spending up to twice the daily figure on a busy day is normal behaviour, as long as the month as a whole stays within 30.4 times the daily amount. If you need a fixed total for a fixed period, Google offers a campaign total budget with set start and end dates, and its budgets overview says you will never pay more than the amount you specify. You can also share one budget across several campaigns.

Is £10 a day enough for Google Ads?

Do the arithmetic rather than guess. £10 a day allows up to £304 in a month (30.4 times £10). Divide that by the cost per click you expect from Keyword Planner to get clicks per month, then multiply by your click-to-patient rate to get new patients per month. At £20 a day, the monthly ceiling is £608.

If the answer is less than one or two new patients a month, the budget is not wrong, but it will take a long time to tell you anything, because a handful of patients either way swings the result. In that case it is usually better to concentrate the same money on fewer, higher-value terms, or a shorter, more intense test, than to spread it thinly across everything.

How much do 1,000 impressions cost in Google Ads?

For search campaigns using cost-per-click bidding, impressions do not cost anything on their own. You pay when someone clicks. A cost per thousand impressions is not the figure to plan a dental search budget around. Plan around cost per click and cost per new patient.

When to increase your Google Ads budget

Increase the budget only when both of these are true:

1. Your cost per new patient from ads is comfortably below your allowable cost, measured over enough weeks to trust it.
2. The campaign is limited by budget. Google shows a "Limited by budget" status when, in its words on the limited by budget help page, your average daily budget is lower than the recommended amount to capture all available impressions and clicks for your current settings.

If the first is true but not the second, more budget will not buy more patients. If the second is true but not the first, more budget buys more of something that does not pay. In that case look at the search terms report first. Paying for searches that never book, such as people looking for jobs, NHS phone numbers or a different practice, is a common and avoidable leak.

Are Google Ads still worth it in 2026?

They are worth it for your practice if your measured cost per new patient is below what that patient is worth, and not otherwise. That is not a dodge. It is the only test that holds up, and it is one you can run. Ads are also the fastest way to appear at the top of a search you do not yet rank for, which makes them useful alongside the slower work of local SEO.

Common Google Ads budget mistakes in dental practices

• Setting the budget before knowing the value of a patient. Without step 1 and step 2, there is no way to know whether the budget is working.
• Targeting too wide an area. Clicks from people who will never travel to you still cost money.
• Running without conversion tracking. If calls and bookings are not tracked, the click-to-patient rate is a guess.
• Splitting a small budget across many campaigns. Each one gets too few clicks to learn from.
• Never reading the search terms report. Wasted terms accumulate quietly.

Agencies and online calculators will offer rules of thumb. Your own four numbers will beat them, because they describe your practice, your patients and your town.