This is the most common question we get on a first call, and it is usually asked as "which one is cheaper." That is the wrong frame. They are priced differently because they transfer risk differently, and the question you should actually be asking is: who should be carrying the risk that this does not work?
What each model actually is
Retainer
You pay a fixed monthly fee for a defined scope of work — SEO, ad management, content, social, whatever the agreement says. You buy effort and expertise. Ad spend is usually separate and on top.
Pay-per-lead
You pay a fixed price per qualified lead delivered. The agency funds and manages the campaigns, and only gets paid when a lead meets the agreed definition. You buy outcomes.
The honest comparison
| Retainer | Pay-per-lead | |
|---|---|---|
| Who carries the risk | You | The agency |
| Cost predictability | Fixed monthly, variable results | Variable monthly, fixed cost per lead |
| Cost at low volume | Same as at high volume | Low — you pay for what you get |
| Cost at high volume | Efficient — the fee does not scale | Expensive — every lead costs the same |
| Who owns the assets | Usually you (site, ad accounts, content) | Often the agency |
| Compounding value | High — SEO and content accumulate | Low — it stops when you stop |
| Time to first patient | Slow for SEO, fast for ads | Fast |
| Main failure mode | Paying for activity that produces nothing | Lead quality disputes |
When pay-per-lead is the right call
- You are opening or recently opened. You have no data, no reviews, no ranking history, and no tolerance for a six-month ramp. Buying appointments outright is the correct move.
- Your cash position is tight. A retainer plus ad spend is a fixed obligation whether or not it works. Pay-per-lead scales down with your bad months.
- You have capacity to fill. If you have empty slots on the schedule, the marginal patient is almost pure margin and lead cost is easy to justify.
- You have been burned before. If the last two agencies produced reports instead of patients, aligning payment to outcomes is a reasonable reaction.
When a retainer is the right call
- You are already at volume. Once you are consistently generating meaningful lead flow, per-lead pricing gets expensive fast compared to a fixed fee spread across the same volume.
- You want to own the asset. Rankings, content, ad accounts, and audience data have durable value. Under most pay-per-lead agreements, none of it is yours.
- You have multiple locations or complex services. Coordinated strategy across locations does not decompose neatly into per-lead units.
- Your brand matters to you. Pay-per-lead optimises for lead volume at a price. It does not optimise for how your practice is perceived over five years.
The math that decides it
You need two numbers. Most practices have neither, which is why this decision usually gets made on vibes.
- Lead-to-patient conversion rate. Of the people who raise their hand, what share actually shows up? This is a front desk number more than a marketing number, and it typically ranges from under a fifth to well over half depending almost entirely on how fast you respond.
- Patient lifetime value. Average revenue per visit multiplied by your patient visit average. Be honest — use collections, not billed charges.
Then: allowable cost per lead = lifetime value × conversion rate × the share of revenue you are willing to spend on acquisition.
Run the same math against a retainer by dividing total monthly cost — fee plus ad spend — by leads produced. Now the two models are directly comparable, which is the entire point.
If you want the full version of this calculation including the failure modes, we broke it down in what a new patient actually costs.
The questions to ask before signing either one
- What exactly counts as a lead? Get it in writing. A form fill with a fake number is not a lead. A ninety-second call from someone asking about your hours is not a lead. Define minimum call duration, geography, and service intent.
- What is the dispute process? How do you flag a bad lead, what is the window, and is there a cap on credits?
- Is there exclusivity in my area? If the same leads are being sold to the practice two miles away, you are in a race, not a partnership.
- Who owns the ad accounts, the phone numbers, the landing pages, and the content? Ask this before you sign, not when you leave.
- What happens on day one after I cancel? If the answer is "your lead flow goes to zero," price that into the decision.
- Show me the reporting. Not a mockup — a real, anonymised dashboard from a current client.
What we actually recommend
For most practices, the answer is sequential rather than either/or.
- Months 0–6: pay-per-lead to fill the schedule now, while simultaneously building the assets you will own — a site that converts, a claimed and optimised Google Business Profile, and a review engine.
- Months 6–18: the owned assets start producing. Search and reviews take a growing share of new patients, and per-lead volume can come down.
- Month 18+: a retainer covering strategy, content, and ad management is usually the cheaper way to run the same volume, with pay-per-lead kept as a dial you turn up when the schedule softens.
That is the model we run at Brand Chiro, and it is why our new practice and existing practice programs look different from each other. If you want us to run your numbers, book a call and bring your last three months of collections.
Frequently Asked Questions
What is a reasonable cost per lead for a chiropractor?
It varies enormously by market and service. A general wellness lead in a small market and a personal injury lead in a major metro are not the same product. Rather than benchmarking against other practices, calculate your own allowable cost per lead from your lifetime value and conversion rate — that number is the only one that matters to your business.
Can I do both at the same time?
Yes, and most practices past the first year should. Use pay-per-lead as the volume dial and a retainer for the compounding assets. Just make sure you can attribute patients to each so you know what is actually working.
Why do agencies dislike pay-per-lead?
Because it moves the risk onto them and requires real capital to fund campaigns before getting paid. Agencies that offer it are betting on their own performance, which is generally a good sign — as long as the lead definition is tight.
How long should I sign for?
Long enough for the model to prove itself, short enough to leave. For pay-per-lead, month to month is reasonable. For SEO-heavy retainers, six months is a fair minimum because the work genuinely takes that long — but insist on a clear exit and asset transfer clause.