The short answer
Better ROI starts with measuring the right thing: calls and booking requests that turn into patients, not clicks. Give each conversion a value based on your own records, then cut spend that brings the wrong people (search terms, locations, hours), make each landing page match its ad, and move to Smart Bidding once Google has enough conversions to learn from. For health ads on Google, skip remarketing lists: they are not allowed for health-related ads under Google's personalized advertising policy.
Measure patients, not clicks
A campaign can only be steered toward what it measures. If Google Ads counts every click or every page view as a conversion, it will find more of those, whether or not anyone books. Set up the actions that come before a visit:
- •Calls. Google's website call conversions use a forwarding number on your site and let you set a minimum call length, so short hang-ups do not count. Our guide to call tracking covers the setup.
- •Booking requests and forms. Count the confirmation step, not the page that holds the form.
- •One per click. For leads, Google recommends counting one conversion per ad interaction, so a patient who submits a form twice is not counted as two leads.
- •Primary versus secondary. Mark the actions you want bidding to chase as primary. Keep softer signals, such as directions clicks or video views, as secondary so they are reported but do not drive bids.
Then close the loop by hand once a month. Ask the front desk to note how new patients found you, and compare that count with the conversions Google reports. A large gap usually means a missing conversion, a double count, or calls that never reach the forwarding number. Our step-by-step conversion tracking guide walks through the tags.
Do the ROI math with your own numbers
Two simple formulas cover most decisions:
- •ROAS = revenue from ads divided by ad cost.
- •ROI = (revenue from ads minus ad cost) divided by ad cost, shown as a percentage.
Here is a made-up month to show the steps. Ads cost $2,000. The front desk confirms 8 new patients came from those ads. The practice estimates that a new patient brings $1,000 in the first year. Revenue is $8,000, so ROAS is 4 to 1 and ROI is 300 percent. Swap in your own figures: the value of a new patient varies widely by specialty, fee schedule and how long patients stay.
To get that value into Google Ads, divide the revenue from ad-sourced patients over a few months by the number of ad leads in the same period, and use the result as the conversion value. Google's conversion value documentation explains that values let you see total business value and the Conversion value/cost column, which is ROAS by campaign, keyword and ad group. Decide in advance whether you also count agency fees and staff time, and use the same rule every month.
Cut spend that reaches the wrong people
- •Read the search terms report. It lists the actual searches that triggered your ads. Add negative keywords for searches that will never book, such as job seekers, schools and do-it-yourself questions. Negatives do not cover close variants, so add plurals and synonyms yourself.
- •Check the location option. Google can show ads to people located in your area or to people showing interest in it. For a local practice, targeting people who are in or regularly in your area usually fits better.
- •Match ad hours to answered phones. If calls after hours go to voicemail and are not returned, look at conversions by hour before you run ads overnight.
- •Respect the health audience rules. Google's personalized advertising policy treats health as a sensitive category. Remarketing lists, customer lists and lookalike audiences built by the advertiser are not allowed for health-related ads, while Google's predefined audiences are. Build reach through keywords and locations instead.
For a full waste review across every channel, see our guide to auditing marketing spend.
Fix the landing page
Google's Quality Score guidance points advertisers to landing pages that are relevant to the ad, easy to use and quick to load. In practice, that means:
- •Message match. An ad for emergency appointments should land on a page about emergency appointments, with the same wording in the headline, not on the home page.
- •One clear next step. A tap-to-call button and a short booking request near the top, repeated lower on the page.
- •Short forms. Ask for what you need to call back (name, phone, reason, preferred time) and collect insurance and history at intake.
- •Speed on a phone. Test the page in PageSpeed Insights on mobile. Our site speed guide lists the usual fixes.
Our guide to building a landing page for dental ads goes section by section.
Bid on value once you have data
Smart Bidding strategies set bids for each auction using your conversion data, so they need working conversion tracking first. Google advises judging them over periods with at least 30 conversions, or 50 for Target ROAS. Target ROAS also requires values on the conversions you track, which is one more reason to do the math above.
- •Few conversions so far: keep a simpler strategy with a maximum cost per click and focus on tracking and landing pages.
- •Steady conversions, similar value each: Target CPA (Google renamed it from Maximize conversions with a target CPA in June 2026) aims for an average cost per conversion.
- •Steady conversions, values that differ: Target ROAS or Maximize conversion value, for example when implant consultations are worth more to you than cleanings.
After a strategy change, Google shows a learning status while it adjusts. Avoid stacking several changes at once, or you will not know which one moved the numbers. Move budget toward campaigns with the best conversion value per cost, in steps, and watch whether results hold.
A monthly ROI review
- Compare Google's conversions with the new patients the front desk recorded from ads.
- Update conversion values if your lead-to-patient rate changed.
- Review search terms and add negatives.
- Sort campaigns by conversion value per cost and shift budget in small steps.
- Check the attribution report. Data-driven attribution shares credit across the ad interactions before a conversion instead of giving all of it to the last click, which matters when brand and service campaigns run side by side.
- Pick one ad or landing page test for next month and write down what you expect to change.
If you want help setting this up, our advertising team can audit tracking, values and landing pages together. For related problems, see ads getting clicks but no conversions and how much to spend on ads each month.
Sources
Google updates its help pages and policies, so check them for current wording.
- •Google Ads Help: About conversion values
- •Google Ads Help: About Target ROAS bidding
- •Google Ads Help: About Smart Bidding
- •Google Ads Help: About conversion counting options
- •Google Ads Help: About primary and secondary conversion actions
- •Google Ads Help: Website call conversions
- •Google Ads Help: About the search terms report
- •Google Ads Help: About negative keywords
- •Google Ads Help: About advanced location options
- •Google Ads Help: About attribution models
- •Google Ads Help: About bid strategy statuses
- •Google Ads Help: 5 ways to use Quality Score to improve performance
- •Google Advertising Policies Help: Personalized advertising
Frequently Asked Questions
What is the difference between ROI and ROAS?
ROAS is the revenue your ads produced divided by what the ads cost, so $4,000 of revenue on $1,000 of spend is a ROAS of 4 to 1. ROI subtracts the cost first and compares the gain with the cost, so the same month is an ROI of 300 percent. Neither one includes your agency fee, staff time or the cost of care unless you add them, so decide which costs count before you compare months.
What is a good ROI for practice ads?
There is no single benchmark that fits every practice, because the value of a new patient depends on your services, fees and how long patients stay. Work out your own break-even point first: what one new patient is worth to you over a year, and what you can afford to pay to get one. A campaign is working when its cost per new patient sits comfortably below that number.
Can I use remarketing for a dental or medical practice on Google?
Google treats health as a sensitive category in personalized advertising, so advertiser-built audiences such as website visitor lists and customer lists are not allowed for health-related ads. Predefined audiences that Google offers are still allowed. Read the current Google policy page before you build any audience, and put the effort into search keywords and landing pages instead.
When should I switch to Smart Bidding?
Once conversion tracking is working and recording real patient actions such as calls and booking requests. Google says to judge Smart Bidding over periods with at least 30 conversions, or 50 for Target ROAS. Before you have that volume, a simpler strategy with a maximum cost per click keeps spend under control.
How do I put a value on a phone call or a form?
Start from your own records. Look at how many ad leads became patients over the last few months and what those patients were worth to the practice, then divide by the number of leads. Enter that figure as the conversion value in Google Ads and update it every quarter as your records grow.
How soon will ROI improve after changes?
Cleaning up search terms, adding negative keywords and fixing a broken landing page can change results within days. After you change a bid strategy or its settings, Google shows a learning status while the system adjusts, so give it time before judging. Compare whole months, not single days, because a few calls more or less move small accounts a lot.