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The percentage-of-revenue rules that circulate in aesthetics are close to useless, because they ignore the two variables that actually determine the right number: what a case is worth to you, and how many more you can physically perform.
Pick your acceptable marketing cost of sale — the share of case revenue you'll spend to acquire it. Many aesthetic practices land somewhere between 10% and 25% depending on stage and ambition. Multiply that by your average case value and you have your maximum acquisition cost per case.
From there, apply your conversion rates. Acquisition cost per case, multiplied by your consult-to-surgery rate, gives your allowable cost per booked consult. Apply your lead-to-consult rate and you have an allowable cost per lead. That chain of four numbers is your budget model, and it tells your media buyer what to optimize toward.
Marketing spend should be capped by what you can operate. If you're booked out four months, additional spend produces longer waits, more cancellations and worse patient experience — not more revenue. At that point the growth constraint is operating days, and the money is better spent on capacity than on ads.
This is the most common misallocation in a growing practice: buying demand against a schedule that can't absorb it.
Your budget has two components. Fixed investment — website, SEO, content, reputation systems — builds an asset and shouldn't fluctuate month to month. Variable spend — paid media — should flex with capacity and seasonality. Practices that cut the fixed layer during a slow quarter usually pay for it two quarters later.
Early on, cost per case will be higher than steady state. Accounts need conversion data, organic hasn't matured, and you have no patient base to reactivate. Budget for a learning period and judge results on a cohort basis rather than monthly.
When comparing agencies, be clear which is which. Media should be billed directly to your card on your own accounts. If a vendor bundles spend into a single invoice, you can't verify what was actually spent, and you generally don't own the account.
Aesthetic consideration windows are long. Judging a channel on 30 days will lead you to cut things that were working. Review quarterly, using cohorts measured out to 90 and 180 days.
Increase spend while cost per case stays inside your target and your schedule can absorb the volume. Stop when either breaks. Both eventually will — and knowing which one broke tells you whether the next investment should go into marketing or into capacity.
We run growth marketing for plastic surgery practices nationwide, and rent licensed operating rooms across South Florida. Tell us which problem you have.