The usual answer is a percentage. Three to five percent of collections for an established practice, more for a startup. It is a fine sanity check and a terrible planning tool, because it tells you what to spend without telling you what to expect.
Work from the other direction.
Start with the gap
How many new patients do you need per month to hit your goal? Not want. Need. Most practices have never calculated this, and the number is smaller than they assume. If you need twenty five new patients a month and you are currently getting eighteen, your marketing problem is seven patients, not a general feeling of not growing fast enough.
Seven patients is a solvable, budgetable problem. “Grow the practice” is not.
Then find what a patient is worth
Pull your last hundred new patients from your practice management software and total their production over their first twelve months. Divide by one hundred. That is your average new patient value, and it is the most important number in this entire calculation.
It varies enormously. A general practice doing mostly hygiene and restorative sits in one range. A practice placing implants sits in a very different one. This is why generic industry benchmarks are close to useless for budgeting: your number is your number.
Then set a ceiling
Decide what you are willing to pay to acquire one new patient. A common comfortable range is somewhere between five and fifteen percent of first year value, depending on your margins and how much capacity you are trying to fill. Multiply your ceiling by the number of patients you need, and you have a budget that is defensible instead of arbitrary.
Seven patients at a hundred and fifty dollar acquisition ceiling is a little over a thousand a month in media. That may be higher or lower than the percentage rule would have told you, but it is tied to an outcome, which means you can tell whether it worked.
Spend it in the right order
Not all of that money should go to advertising, and the sequence matters more than the total.
First, the free asset. Finish your Google Business Profile completely and build a consistent review habit. In the practices we manage, the profile generates around three times the call volume of paid search. Buying clicks before this is done is paying to compensate for something you could fix for nothing.
Second, the conversion layer. A site that loads fast and makes contact easy, plus a front desk that answers the phone and knows how to book. Most practices are losing more people here than anywhere in the ad account.
Third, media. Search advertising on high intent terms, tightly negated, in the geography you actually serve.
Fourth, everything else. Social, video, direct mail, sponsorships. These build a brand over time and they are worth doing, but only after the first three are working, because they feed a machine that has to convert what they send.
Reviewing it
Set the budget for a quarter, not a month. Marketing that gets switched off in week three never gets a chance to teach you anything. Then review it against booked new patients and production, not against clicks.
If you cannot connect the spend to those two numbers yet, that is the project to fund before you increase any budget at all.
