How many new patients does a dental practice need? Work out yours

How many new patients does a dental practice need? Any figure you see quoted as a standard is a guess about somebody else's practice. The useful number is yours, and it comes from four things you can measure: how many patients you lose each year, how many you can actually see, how much you want to grow, and how many enquiries turn into a first appointment. This guide walks through each step with formulas you can fill in from your practice management software.

The short answer

The number of new patients a practice needs in a year is:

New patients needed = patients you will lose + the growth you want, capped by the capacity you have.

Then work backwards to enquiries: divide by the share of new patient enquiries that book, and by the share of booked first appointments that are attended. That tells you how many enquiries your marketing needs to produce each month.

Step 1: Count your active patients

Start with a clear definition of an active patient, because everything else depends on it. A sensible definition is one that matches clinical guidance and the NHS's own statistics:

• Adults: seen at least once in the last 24 months.
• Children: seen at least once in the last 12 months.

Those windows match the longest recall intervals in NICE guideline CG19, which says the longest interval between oral health reviews should be 24 months for adults and 12 months for under 18s. They are also how NHS Dental Statistics count patients seen. Run a report in your practice management software of unique patients by last attended date and count those inside the windows. Call this figure A, your active base.

If you hold an NHS contract and see private patients too, count the two groups separately. They usually behave differently.

Step 2: Work out how many patients you lose each year

This is the number you need just to stand still. The cleanest way to measure it:

1. Take the list of patients who were active exactly 12 months ago.
2. Count how many of them are no longer active today, because their last visit has passed the 24-month (adult) or 12-month (child) window.
3. Add patients you know have left: moved away, died, or asked to be removed.

Call the total L, patients lost in a year. Your annual attrition rate is L ÷ A. Work it out for the last two or three years if your software allows, because one year can be distorted by a clinician leaving or a contract change.

Look at who you are losing as well as how many. If most lapsed patients were last seen by one associate who has since left, the fix is a recall campaign to those patients, not new patient marketing.

Step 3: Work out how many patients you can actually see

Growth is pointless if there is no space in the book. Capacity for a dental practice usually runs out in examination slots first, so measure it there.

1. Exam slots a year (S). Add up the routine examination appointments your dentists can offer in a year, after holidays, training and emergency time.
2. Exams per active patient a year (E). Divide the number of routine examinations you did last year by your active base. This reflects your real mix of recall intervals.
3. Maximum active base (M). M = S ÷ E.

If M is close to A, you are full, and the right goal is replacing the patients you lose rather than growing. If M is well above A, you have room. Do the same check for hygiene if hygiene appointments are where your private income comes from.

Step 4: Set your growth target

Decide what active base you want in twelve months. Call it T, and keep it at or below M. Then:

If you only want to stand still, T = A and the answer is simply L.

Step 5: Turn new patients into enquiries

Your marketing produces enquiries, not patients. Two more figures from your own records turn N into a target your team can act on.

• Booking rate (B). Of new patient enquiries by phone, form, email and online booking, what share booked a first appointment? Count a recent month by hand if your software does not track it.
• Attendance rate (R). Of booked first appointments, what share were attended rather than cancelled or missed?

Enquiries needed per month = (N ÷ 12) ÷ B ÷ R.

This step usually shows where the cheapest gains are. A practice with a low booking rate often gets more new patients by improving how the phone is answered than by spending more on advertising.

NHS practices: start from your contract, not your marketing

If you hold an NHS contract in England, your contracted activity sets the work you have to deliver, and new patients are part of how you deliver it. Two adjustments to the method above:

• Measure activity per new patient. From last year's records, work out the average UDAs delivered in a new patient's first year. Divide the activity you are short of by that figure to see how many new NHS patients would close the gap.
• Keep your NHS website profile current. Patients looking for an NHS dentist taking new patients use the NHS website. NHS England's policy book for primary dental services says contractors must update or verify their NHS website profile at least once every 90 days, including opening times, contact details and whether they are accepting new NHS patients. If you have NHS capacity and your profile says you do not, you will not be found.

Contract values vary more than most owners realise. Our study of NHS dental contract values found contracts a mile apart are paid a median £3.15 per UDA apart, so compare your activity figures with your own contract rather than a neighbour's.

How can you be an NHS dental patient?

This is one of the questions patients ask most, and it shapes how they find you. The NHS website tells patients they can contact any NHS dentist and ask for an appointment, that they may be asked to join a waiting list, and that filling in a registration form at a first visit does not guarantee NHS care at that practice in future. If your practice has NHS availability, say so clearly on your website and your Google Business Profile as well as the NHS website, because patients search for "NHS dentists taking new patients near me" on Google too.

Where the new patients come from

Once you know the monthly number, ask your front desk to record how every new patient heard of you. After three months you will know which sources supply most of them. Common sources include Google search and Maps, word of mouth, referrals from other practices and, for NHS patients, the NHS website. Our guide to getting more dental patients covers each channel, and marketing for dentists puts them in order of what usually pays back.

Practice Radar shows the search side of this: how many people search for a dentist in your area each month and where your practice appears in the map and results, re-checked weekly. That helps you judge whether your target is realistic for the demand in your town.

Common mistakes when counting new patients

The formulas are simple. The errors creep in through definitions. Check these before you trust your numbers:

• Counting registrations, not attendances. A patient who filled in a form and never came is not a new patient. Count first appointments attended.
• Counting returning patients as new. Someone who lapsed three years ago and comes back may be set up as a new record. That is a reactivation, which is good news, but it belongs with your recall figures, not your new patient figures.
• Mixing emergency-only patients in. Patients seen once for an urgent problem who never join the practice inflate the new patient count without adding to your active base. Track them separately.
• Ignoring transfers between clinicians. When an associate leaves and their list moves to a colleague, some software flags the patients as new to that clinician. They are not new to the practice.
• Using one month. New patient numbers swing with school holidays, bank holidays and staff leave. Use a rolling three or twelve month total.

Check the number every quarter

Recalculate A, L and your booking and attendance rates every three months. The number changes when a clinician joins or leaves, when you add a hygienist, when your NHS contract changes or when a competitor opens nearby. A practice that knows its own figures can tell within one quarter whether its marketing is working, which is far more useful than any national average.