What Dental AI Software Really Costs Per Surgery Per Year

A vendor quotes you £249 per surgery per month. You have three surgeries. The maths takes four seconds: £747 a month, £8,964 a year, and it goes into the budget line as a round nine grand. Twelve months later the actual spend attributable to that one piece of software sits somewhere north of £20,000, and nobody can quite point at where the gap came from.

The gap is not hidden. It is just spread across eight or nine separate lines that never appear on the same page, and several of them never appear on an invoice at all. Below is the full model, with three worked examples at different practice sizes, and the reason the headline monthly figure is roughly a third of the truth in year one.

The nine lines that make up the real number

Here is the shape of it before we put numbers in:

True first-year cost per surgery =
  (licence × 12
   + metered usage × 12
   + one-off onboarding and configuration fees
   + integration labour (your IT, their IT, your PMS vendor)
   + hardware and display
   + clinical hours lost to training × contribution rate
   + support hours × wage rate
   + the productivity dip while thresholds settle
   + governance: DPIA, contract review, DSPT evidence)
  ÷ number of surgeries

Only the first two lines ever get quoted. The rest are real money leaving the practice, and four of them are concentrated in the first ninety days.

Line one: the licence, and how it is actually metered

Per-surgery pricing is the common UK model for radiograph AI. Pearl’s Second Opinion, Overjet and VideaHealth all sell into the UK through a per-location or per-operatory subscription, and indicative UK figures in 2025 and 2026 land between £180 and £350 per surgery per month depending on volume commitment and contract length. Three-year terms cut roughly 15 to 20 per cent off the monthly, which is exactly why they are offered.

Watch what the unit actually is. “Per surgery” sometimes means per physical operatory, sometimes per concurrent user seat, and sometimes per dentist. A five-surgery practice running nine associates across a seven-day rota pays very differently under each definition. Ask which one applies and get it written into the order form, because a practice that grows from three to four chairs mid-term can find the fourth chair priced at list rather than at the discounted rate everyone else is on.

Line two: per-image and per-event fees

This is the line that quietly compounds. Many contracts bundle a monthly image allowance and meter everything above it at £0.15 to £0.40 per radiograph analysed. Triage products work on a per-submission basis instead: photo assessment tools in the Smile Mate and Toothpic mould run around £1.50 to £4.00 per patient submission. AI front-desk voice agents are usually metered per minute of connected call, commonly £0.18 to £0.35.

Model your own volume rather than accepting the vendor’s assumption. A three-surgery practice seeing 60 patients a day, with around 35 per cent radiographed at an average of 2.2 images each, produces about 925 images a month. That sits neatly inside a 1,000-image bundle until January, when the new-patient surge and a run of OPGs pushes you 300 over. At £0.25 that is £75 that month. Do it for a few months a year and you have added £900 to a £8,964 licence without a single conversation.

The front-desk number is the one that shocks people. Sixty inbound calls a day, 40 per cent handled end to end by the agent, 3.5 minutes average handling time, 21 working days: that is 1,764 billable minutes a month. At £0.28 you are paying £494 a month, or £5,928 a year, for a product whose website said “from £99”.

Line three: getting it to talk to your practice management and imaging software

Nothing in UK dental integrates cleanly by default. Your PMS is Dentally, SOE Exact, Carestream R4 or Systems for Dentists. Your imaging is Romexis, CS Imaging, VistaSoft, Sidexis or Apteryx. The AI vendor supports some combinations natively, bridges others through a local connector service, and handles the rest by watching a folder.

Budget for a dental-specialist IT partner at £450 to £700 a day. Two to four days is normal for a single product across one site: connector install, firewall and VPN rules, imaging folder permissions, test captures, and then the inevitable second visit when the connector stops after a Windows update. Multi-site groups should assume a day per site after the first, even where the config is identical, because the network rarely is.

If you want a structured way to score vendors on integration depth before you get this far, the Choosing and Integrating Tools pillar covers the questions that separate a real PMS integration from a screen-scraper with good marketing.

Line four: training time is clinical time

Practices routinely cost training at zero because nobody raises an invoice for it. That is a bookkeeping habit, not an economic fact. Two hours of initial training plus an hour of follow-up, across six clinicians, is 18 hours of chair time that did not happen.

Value it properly. A mixed-practice associate generating roughly £150 an hour gross, with the practice retaining around 55 per cent, represents about £82 an hour of lost contribution. Round to £90 and those 18 hours cost £1,620. Nurses and reception at £18 to £25 an hour add a few hundred more. Your practice manager will spend 25 to 40 hours on rollout coordination across the first quarter, which is real, and which is why other projects slip that quarter.

Line five: the dip before the lift

Every AI adoption has a period where clinicians are slower, not faster. The software flags caries at a sensitivity threshold that does not yet match how the practice works, so the first few weeks are spent disagreeing with it, adjusting it, and explaining the annotated images to patients who now want to talk about them.

Two extra minutes per radiographed patient, across 21 radiographed patients a day, is 42 minutes of daily chair time. Over a six-week settling period at around 30 working days, that is 21 hours, or roughly £1,890 of contribution at £90. The lift afterwards is often real. It just does not arrive in month one, and the cash flow forecast should say so.

Line six: governance, which NHS practices cannot skip

A DPIA is not optional for clinical decision support processing patient images. Your DSPT submission needs evidence of it. Contract review by a solicitor who understands dental and UK GDPR runs £400 to £900 per agreement, and you want one for each vendor rather than one covering all three. Confirm the product’s UKCA or CE marking and its classification, and tell your indemnifier what you have installed. Total this out at £1,200 to £2,600 for a first deployment.

Worked example A: three-surgery mixed NHS practice, radiograph AI only

Divide by three surgeries and the first-year figure is £6,935 per surgery against a headline of £2,988. The multiplier is 2.3.

Worked example B: six-surgery group running three AI products

Add patient triage and an AI front-desk agent to radiograph reading across six chairs and the recurring spend alone reaches about £31,600: £16,488 of licence at a volume-discounted £229, £792 of image overage, £3,960 of photo assessments at £2.75 across 120 submissions a month, and £10,349 of metered call minutes.

One-off and internal costs pile on top: £4,200 of onboarding across three vendors, £3,300 of integration labour, £1,400 of VoIP rework so the agent can actually answer the line, £2,565 of clinical training, £1,056 of support-staff training, £2,100 of management time, a £3,400 productivity dip, £2,600 of governance and £2,400 of hardware. That is £23,021.

Combined, £54,610 in year one, or £9,102 per surgery. The licence-only headline said £2,748. The multiplier here is 3.3, and the reason it is worse than example A is that the metered products scale with patient volume while the fixed costs did not shrink.

Worked example C: single-handed practice

Small practices get hit differently. One surgery at £299 a month with no volume discount is £3,588, and the image volume of around 320 a month stays inside the bundle, so metered usage is zero. Then come £950 of onboarding, £825 of integration, £520 of training, an £880 dip, £1,110 of governance (six hours of the principal’s own time plus a £450 contract review) and a £420 monitor.

First year: £8,293, or 2.3 times the headline. Every one of the one-off costs is spread across a single chair rather than six, which is why per-surgery costs in a squat or single-handed practice look worse than in a group even when the group’s total bill is seven times larger.

Year two is the number you should negotiate on

Strip the one-offs and year two for the three-surgery practice is roughly £10,400: licence plus a typical 4 to 6 per cent annual uplift, image overage, a couple of refresher sessions and one support call-out. That is £3,467 per surgery, half of year one.

So when a vendor shows you a return-on-investment model built on year-two economics and asks you to sign a 36-month term, they are not lying, they are just skipping the year that hurts. Price the deal on the blended three-year figure instead. For example A that is roughly £41,600 over three years, £13,867 per surgery, or £385 per surgery per month against a quoted £249.

The five questions that change the quote

Before the next demo, get these in writing: what exactly does one unit of “per surgery” mean and what happens when we add a chair mid-term; what is the monthly image or minute allowance and the overage rate; who pays for integration labour if the connector breaks after a PMS update; what is the annual uplift cap; and what does exit look like, specifically whether annotated studies leave with us in a readable format.

Ask the fifth one first. The answer tells you more about the vendor than the price does.