No. When an agency takes a percentage of your ad spend, it earns more when you spend more, not when you book more. That single clause quietly redefines the relationship: your budget stops being fuel for patient growth and becomes the agency's revenue line. A med spa should pay a flat fee, own its ad accounts, and pay the platforms directly.
This is the most common pricing model in the industry, and most owners sign it without doing the math. Here is the math.
How percentage pricing actually works
The standard deal is a management fee of 10 to 20 percent of monthly ad spend. Spend $10,000 on Google and Meta, and the agency bills $1,000 to $2,000 on top, every month, before a single consult is booked. The pitch is that it scales fairly. What it actually does is index the agency's paycheck to the one number they help decide: how much you spend.
Why the incentive is broken
- They set the budget they profit from. The person advising you to raise spend earns a commission on the raise. That advice can never be neutral.
- Doubling spend doubles their fee, not their work. Managing a $30k account is not twice the labor of a $15k account. The margin expands with your budget, not with your bookings.
- Waste still gets billed. If half the budget burns on bad targeting, the agency collects its percentage on the waste too. Inefficiency is revenue.
- The fix that helps you hurts them. Sealing your conversion leak often means you can book more from the same spend, or less. No percentage agency is eager to shrink the number it is paid on.
What to demand instead
- A flat fee, scoped and agreed before you start. The price of the work is the price of the work.
- You pay the platforms directly. Your card on the ad account, full transparency into where every dollar goes.
- You own the accounts. Google, Meta, analytics, all of it. If you part ways, the assets and history stay with the clinic.
- Reporting in booked consults. Cost per booked consult and revenue per campaign, not clicks and impressions.
- Conversion fixed before spend scales. More budget into a leaking funnel just buys more leaks. Foundation first, fuel second.
The question that ends the meeting
Ask any agency one question: "If you find a way for me to book more patients while spending less on ads, does your fee go down?" Watch the answer. A percentage agency cannot say yes without cutting its own pay. A flat-fee partner says yes, because that outcome is the whole job.
See the gap before you spend
Before you sign with anyone, run the free audit. See exactly where your clinic is invisible and leaking, and what the work actually is.
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Is percentage-of-spend pricing ever fair?
At very large budgets it can approximate the real workload, which does grow with spend. But for a med spa spending five to fifty thousand a month, the workload barely changes with budget, while the fee doubles when spend doubles. At that scale it is a tax on your growth, not a fair price for labor.
What should a med spa pay instead?
A flat monthly fee, scoped to the work, agreed before you start. You pay the ad platforms directly, you own the accounts, and the agency earns renewal by bookings, not by billing a percentage of a bigger budget.
What questions expose a bad agency deal?
Ask three. Who owns the ad accounts if we part ways? Does your fee rise when my spend rises? Will you show me cost per booked consult, not clicks? Wrong answers to any of these are your exit sign.
Flat fee. Med spas only.
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