How Much Ad Budget Does a Medical Device Test Need?

The question underneath: what can you afford to pay for one lead?

Often the person asking how much to spend is really asking whether ads will work for their device. A test cannot answer that until you know what "working" means in dollars. So before any budget, work out your break-even cost per lead: the most you can pay for one lead and still come out even on the customers those leads produce.

You need three numbers:

1. Average first order value. What a new customer typically buys first.
2. Gross margin on that order.
3. Close rate. Out of every 10 leads (demo requests, sample requests, quote requests), how many become paying customers.

The formula:

Break-even cost per lead = first order value x gross margin x close rate

Here is an example with made-up numbers. They are not a benchmark and not from any client.

If ads bring you leads at $150, you are ahead on the first order alone. If they cost $300, the first order does not cover them, and you need repeat orders or a higher close rate to make it work. Use the first order, not a lifetime value you have not measured yet. If you do not know your close rate, ask your sales team how many of last quarter's inbound requests became customers. A rough answer is better than none.

How many conversions does a test need to tell you anything?

The test exists to measure one number: your cost per conversion. The fewer conversions you have, the more that number swings on luck.

Look at what one extra conversion does:

• With 3 conversions, one more cuts your cost per conversion by 25 percent.
• With 25 conversions, one more cuts it by about 4 percent.

At 3 conversions you do not have a cost per conversion; you have a guess. At about 25, a single good or bad week no longer changes the answer much. That is why a first test should be sized around a target number of conversions, not a round dollar amount. Twenty-five is a working target chosen for that reason, not an industry standard or a Google requirement.

Google also says its automated bidding needs time to learn, and that you should "allow enough time (at least one conversion cycle) to pass before evaluating performance." A conversion cycle is the time it takes for a click to become a conversion. For a demo request that might be the same day; for a device with a committee purchase it is longer.

How to price the clicks

Open Google Keyword Planner in your Google Ads account and enter only the searches a buyer would type when looking for a product like yours: the product category name, the procedure plus "device" or "system", the specialty plus the product type. Keyword Planner shows estimated monthly searches and a forecast of clicks and cost for the keywords you choose, according to Google's Keyword Planner help page. The same page notes that Google's policies often prevent results for keywords in sensitive categories like health, so some device terms may come back empty. If that happens, use product and category terms instead, and treat the first weeks of the test as your check on how many clicks exist.

Then work out the test budget:

Clicks needed = target conversions divided by landing page conversion rate

Test budget = clicks needed x cost per click

Continuing the example, again with made-up numbers:

In this example, $150 per lead sits under the $187.50 break-even, so the test is worth running. If your numbers show an expected cost per lead well above break-even, fix the offer, the landing page or the close rate first. Spending more will not change the math.

The landing page conversion rate is the input you know least. That is fine: it is exactly what the test measures. Use a cautious guess and see what you actually get.

Check how many buyer searches exist before you set the budget

In a narrow device category, the searches that come from real buyers can be very few. Before you settle on a budget, look at the click forecast in Keyword Planner for your high-intent keywords only.

Suppose, in the example, the forecast shows your buyer keywords can deliver about 120 clicks a month, however much you bid. Over three months that is about 360 clicks, not the 417 you wanted. You have three honest choices:

• Run longer. Four months gets you to the 417 clicks.
• Accept fewer conversions. About 21 conversions at 6 percent still gives you a usable first read.
• Do not add money. Raising the budget past what the buyer searches can absorb pushes your ads onto weaker searches and weaker placements. The extra spend buys clicks from people who were never going to buy.

Searches with high volume but no buying intent ("what is" and "how does it work" searches) are better answered with articles on your site than with paid clicks.

Set up tracking before you spend the first dollar

A test with broken tracking produces a number that looks like a cost per lead and is not one. Before the ads go live, make sure a real lead (a submitted form, a booked call, a sample request) is recorded as the conversion, and that a page view is not. Submit a test lead yourself and confirm it shows up in Google Ads, in your analytics and in your CRM or inbox.

If your account already reports conversions that never turn into leads, read how to find the tracking break when ads report conversions but no leads arrive before you run a test. For the landing page itself, see medical device PPC landing page best practices.

How to set up the test so the money reaches real buyers

These settings decide whether a small budget buys searches from buyers or leaks into places you cannot judge.

• Start with your highest-intent keywords only. A handful of tightly grouped keywords teaches you more than a long list with a few clicks each. See how to structure medical device Google Ads campaigns.
• Decide on search partners. Google includes search partner sites by default in new Search campaigns. Turning them off for a first test means the result reflects Google Search alone. You can add them later and compare.
• Check the location setting. Google's default location option is "Presence or interest", which can include people who have only shown interest in your area. If you can only sell in the United States, "Presence" limits the ads to people who are in, or regularly in, the locations you target.
• Set the daily budget from the monthly number. Google can spend up to twice your average daily budget on a given day, and over a month it will charge no more than 30.4 times your average daily budget, according to Google's help page on daily budgets. So a $1,250 monthly test is a daily budget of about $41.
• Leave the ads alone. Change ads or keywords every few days and you will not know which version produced the result.
• Pay the platform directly. Put your own company card on the ad account. You see every dollar spent, and the agency's fee is a separate line.

How to read the result

At the end of the test, compare your actual cost per lead with your break-even number.

• Well under break-even: the channel works for this product at this size. Keep going, and start following those leads to first orders.
• Close to break-even: look at the landing page and the follow-up first. A better page or faster sales follow-up often moves the number more than any ad change.
• Well over break-even: paid search may not be the right first channel for this product yet, or the offer needs to change. That is a real answer, and it cost you a few thousand dollars instead of a year.

Then keep watching. A lead is not a customer. Over the next sales cycle, record how many of the test's leads became customers, and replace the close rate you guessed with the one you measured. For how to judge the leads themselves, see lead quality vs lead volume in medical device marketing.

What does not work

• Picking a round number first. "$5,000 a month" is not a test design. The number should come out of the conversions you need and the clicks available.
• Spreading a small budget across every channel at once. Each channel then gets too few conversions to tell you anything.
• Judging by clicks or impressions. Neither tells you what a lead costs.
• Moving a Google-sized budget to LinkedIn and expecting the same read. Cost per click differs by platform. Check LinkedIn's own forecast in Campaign Manager before you assume the same budget will produce the same number of conversions.
• Adding budget to a category with few searches. The extra money goes to weaker searches, not more buyers.

A first test is also not your full marketing budget. For planning the whole year, see the medical device marketing budget guide and the budget calculator.

How Buzzbox Media sizes a first ad test

When a device company asks me how much to spend, I start with their break-even cost per lead and a Keyword Planner check on the buyer searches in their category, and I set up tracking before any budget goes live. Ad spend is billed by Google or LinkedIn to the client's own account. If you want help running the numbers for your device, see Buzzbox Media's medical device PPC services or book a free consultation.