A new patient's cost is easy to see, because the bill arrives: the advertising, the introductory offer, the extra time a first visit takes. Nobody gets a bill for the patient who quietly stops coming. There is no invoice, no complaint and no line on a report. One missed cleaning becomes two, and a year later that patient is sitting in someone else's chair.
That is what makes it the quietest leak in a practice. The schedule stays full because new patients keep filling it, so a practice can spend more every year on new patients and still stand exactly where it stood.
This guide is about the patients you already have: what each one is worth, the report that finds the ones already drifting, the four reasons patients leave and what keeps each one, and how to replace the ones you lose without paying for them.
- Patients rarely leave loudly
- Why keeping a patient beats finding a new one
- What one patient is worth to you
- The list worth ten minutes this week
- Reason one: they never hear from you between visits
- Reason two: something went wrong, and nobody asked
- Reason three: the treatment they need feels out of reach
- Reason four: no insurance, so nothing brings them in
- Replace the ones you lose, without paying for them
- How one practice keeps them
- Run your own numbers
- Sources
Patients rarely leave loudly
Ask how many patients the practice lost last year and the answer is a guess, because leaving is not an event anyone records.
A patient who is angry leaves once, loudly, and you hear about it. A patient who drifts leaves slowly and silently. They moved a cleaning because of work. The reminder arrived at a bad moment. Nobody called to rebook, and after a while not coming in became the habit. They are not unhappy with the practice. They are simply not in it anymore.
Drift does not show up in production, because new patients fill the gaps. It does not show up in reviews, because drifting patients do not write them. It shows up in exactly one place: a list of patients who have not been seen in a long time, which nobody pulls until somebody decides to.
Why keeping a patient beats finding a new one
A patient you already have has already been paid for. The marketing that brought them in, the first visit, the X-rays and the history, the trust built over years — that money is spent. Keeping them costs a phone call and a reason to come back. Replacing them starts the spending again from zero.
A new patient is also a gamble that an existing one is not. They arrive knowing nothing about the practice, and some never come back after the first visit: the acquisition cost paid, and nothing to show for it. The patient who has been coming for six years already knows the team, already trusts the dentist, and needs no convincing that the practice is worth the drive.
And a new patient walks into the same practice the old one left. Whatever let the first patient drift — no contact between visits, a bad moment nobody asked about, a treatment plan that stalled on cost — is still there, waiting for the next one. Pouring more patients in does not fix a bucket with a hole in it. It just makes the hole more expensive.
What one patient is worth to you
The arithmetic takes five minutes and uses only your own figures.
Start with last year's collections and divide by the number of active patients — use your practice-management system's own definition of active, and the same one every time. That is what an average patient is worth to the practice in a year, before counting anyone they send you.
Then count the patients you lost: the ones your system counted as active a year ago and does not count now. Multiply the two. That is the production that walked out of the practice last year, without a single complaint.
Then the other half. Take last year's new patients and count the ones who never returned after their first visit. Each of them cost whatever you spend to win a new patient, and left before that spending was paid back. Multiply the count by your cost per new patient; that is acquisition money that bought nothing.
You will come across industry figures for how many patients a practice loses each year. This guide does not use them: practices differ too much for one number to describe yours. If you keep a page of the six numbers that show where a practice is losing money, add these two to it, with the date, and run them again in six months.
The list worth ten minutes this week
The patients behind that count make the most useful list in the practice, because every name on it belongs to someone who already knows you.
Pull your inactive patients: everyone with no visit in the last eighteen months and nothing on the schedule. Every practice-management system can produce it. When the first practice on Profit Smiles ran it, the list came back at more than three hundred names.
Then have someone call ten of them a week. Not a mailer, not a campaign — a short call from a person at the front desk:
"It's been a while since we've seen you — we'd love to get you back on the schedule. Would a morning or an afternoon work better?"
No guilt, no "you're overdue." Nobody on that list is in trouble. Whatever the reason they stopped coming, the first thing they hear from the practice should be that they are welcome back.
Ten calls a week does three jobs at once. It books patients who would have come back if anyone had asked. It finds the ones who have moved away or switched practices, so the list gets cleaner every week. And now and then it reaches a patient who left because something went wrong — the most valuable call on the list, because nobody else was ever going to hear about it.
The catch is that it only works if it keeps happening. Ten a week for four weeks is easy. Ten a week in the middle of a brutal June is where it dies. So give it an owner and a day — the same person, the same morning, every week — and keep a tally of called, booked and seen, so the list visibly shrinks and you know it is working.
Want the between-visit contact kept up for you — the survey after every visit, the low scores flagged, the follow-up when a plan goes quiet, a post on your pages every morning? The 100 Day Profit Reset Protocol is free for your first hundred days — every tool, no credit card, nothing to cancel.
Reason one: they never hear from you between visits
The inactive list finds the patients who have already drifted. The better work is keeping everyone else from joining them, and that starts with the four reasons patients drift in the first place.
The first is the simplest: patients forget a practice they never hear from. Between two cleanings there are months of silence, and every one of them is an opening — for a competitor's mailer, for a busy season that pushes the next visit back.
The fix is to be present between visits without becoming a nuisance. A question after every visit, asking how it went. A follow-up when a treatment plan goes quiet. A post on the practice's Facebook and Instagram pages every morning, for the patients who follow them. All of it says the practice is still there, and still paying attention. The guide on social media with no marketing budget covers the daily post that keeps a practice in front of the patients who already follow it.
Reason two: something went wrong, and nobody asked
Some patients leave for a reason: a long wait, a bill that surprised them, a cleaning that felt rushed, a front desk that was short with them on a bad day. A patient who leaves for a reason does not have to say so. They just do not book the next visit.
Bain & Company, which devised the Net Promoter Score, puts numbers on the pattern. The customers who answer its recommend question with a six or below — detractors — "have high rates of churn and defection," and account for more than 80% of negative word of mouth. Even the satisfied-for-now middle, the sevens and eights, have repurchase and referral rates as much as 50% lower than the customers who answer nine or ten.
So the patients to worry about are the ones who were not delighted, and the only way to find them is to ask. Being asked feels like being cared about; silence feels like being processed. A two-question survey at checkout takes about thirty seconds, and it finds the unhappy patient while they are still your patient. Every low score gets a phone call the same day. Caught early, a bad visit becomes a problem you fixed. Ignored, it becomes a patient you never see again, and sometimes a review. The guide on turning happy patients into referrals covers the survey itself and the checkout routine that gets it answered before the patient leaves.
As Dr. Prachi Deore puts it in the protocol's own training: "The dentist who chases down every low score — who picks up the phone and asks, 'I saw your answer; what happened?' — keeps more patients, and stops bad reviews before they're ever written."
Reason three: the treatment they need feels out of reach
Dental care is the care people most often put off because of cost. In the CDC's National Health Interview Survey for 2023, about one in five adults — 21% — delayed or went without dental care because of cost, against 8% for medical care.
For a patient who has been told they need a crown they cannot afford, that has a second effect. The next cleaning now comes with an awkward conversation attached, and the easiest way to avoid the conversation is to avoid the practice. A stalled treatment plan can cost a practice the patient, not just the procedure.
Two things keep the relationship intact. A follow-up that keeps the door open after a patient leaves without booking — one message a week for nine weeks, warm rather than pushy — and a way to pay that fits the month rather than the total. The guides on recovering unscheduled treatment and in-house payment plans cover both.
Reason four: no insurance, so nothing brings them in
Dental insurance, whatever else it costs a practice, gives a patient a reason to come in. The benefit renews, the cleaning is covered, and not using it feels like waste. A patient with no dental insurance has none of that. Nationally, 27% of US adults — about 72 million people — have no dental coverage, and in the CDC's National Health Interview Survey, three in four working-age adults with dental insurance had seen a dentist in the past year, against fewer than half of those without it.
Those patients are already on your list, and they are the easiest to lose, because nothing reminds them to come back.
A membership plan gives them the reason insurance would have. The patient pays an annual fee directly to the practice; the year's preventive care — an exam and X-rays, say — is included, and a member discount applies to any other treatment. Someone who has paid for the year books the cleaning and shows up for it. The guide on starting an in-house membership plan covers what to charge, what to include, and the line between a plan and insurance.
Replace the ones you lose, without paying for them
Even a practice that does all of this will lose patients. People move, change jobs, and follow a spouse's insurance somewhere else. The only question is what replaces them.
The expensive answer is advertising. The cheaper one is already in the chair: a patient who stayed, asked at the right moment, sending a friend. A referred patient arrives already trusting the practice and costs nothing to acquire. The same two-question survey that finds the unhappy patients also finds the delighted ones, and the referrals guide linked above covers what to do with them.
How one practice keeps them
Dr. Prachi Deore runs Coppell Smiles, a solo practice in Coppell, Texas, and hers was the first practice on Profit Smiles — the tools were proven there before they were offered to anyone else. It was her practice's inactive list that came back at more than three hundred names.
Her practice runs the fixes in this guide as habits, not projects. Every patient gets the two-question survey at checkout, and the low scores get a call. Every patient who leaves without booking their treatment gets nine weeks of follow-up. The practice's pages post every morning. Every uninsured patient hears about the membership at checkout.
None of her results is a retention rate — no report shows a departure that never happened — but each measures what staying in touch produces. Monthly referrals went from ten to twenty-one in the first ninety days, from patients she already had. Treatment acceptance went from 47% to 52% in the first ninety days of using the follow-up and payment-plan tools together, with monthly production up about $2,200 between them. Forty-eight patients joined her membership plan in its first ninety days, each with the year's exam already paid for.
Her results are one practice's results, measured in the platform, and individual results vary.
Run your own numbers
The free patient attrition calculator on this site does the arithmetic from this guide: the production that walks out with the patients who drift away each year, and the acquisition spend wasted on new patients who never return. It opens with an example practice's figures; replace them with your own, and nothing you enter leaves your browser.
Sources
- Bain & Company, Measuring Your Net Promoter Score: on the zero-to-ten recommend question, detractors (0–6) "account for more than 80% of negative word of mouth" and "have high rates of churn and defection"; for passives (7–8), "repurchase and referral rates are as much as 50% lower than those of promoters." The question comes from Frederick F. Reichheld, "The One Number You Need to Grow," Harvard Business Review, December 2003. Net Promoter, NPS and Net Promoter Score are marks of Bain & Company, NICE Systems and Fred Reichheld.
- Peterson-KFF Health System Tracker, How does cost affect access to healthcare? (March 2026), analyzing the CDC's 2023 National Health Interview Survey: 21% of adults delayed or went without dental care because of cost, against 8% for medical care.
- CareQuest Institute for Oral Health, State of Oral Health Equity in America (2024 survey of more than 9,000 adults): 27% of US adults — about 72 million people — have no dental insurance.
- CDC, National Center for Health Statistics, QuickStats: Percentage of Adults Aged 18–64 Years Who Had a Dental Visit in the Past 12 Months, by Dental Insurance and Year, MMWR 2022;71:582 (National Health Interview Survey, 2019): 75.0% of insured working-age adults against 47.8% of the uninsured.
- What a patient is worth is arithmetic on your own figures, not a benchmark, and this guide uses no industry figure for how many patients a practice loses each year. The inactive-list count is Dr. Prachi Deore's own practice report. Her results are those of one practice, measured in the platform; individual results vary.