From solo to group practice in the UK: a therapist's guide to growing well

Most therapists do not set out to build a group practice. They set out to do good clinical work, they become known for it, and one day the waitlist is longer than any one person can responsibly hold. The question that follows is quietly significant: do you keep turning people away, or do you grow?

Growing is rarely a single decision. It is a sequence of choices, each with a clinical face and a commercial one, and the structure you choose at the start shapes almost everything that comes afterwards. This guide walks through those choices as they apply in the UK, with attention to the two areas where well-meaning practice owners most often come unstuck: employment status and VAT. Neither is difficult once you understand it. Both are expensive to get wrong.

Knowing when it is time

One of the most reliable signals is a persistent waitlist. The familiar pattern is that a solo practitioner fills their calendar, begins adding enquiries to a list, and expands once that list is long enough to justify bringing in another therapist to absorb it. Growing because demand already exists is far steadier than hiring first and then scrambling to find clients to fill the new caseloads, although the second approach can work if you recruit therapists who arrive with their own referral streams.

It is worth being honest with yourself about the motivation, because it will shape the practice you build. Some owners grow to serve more people, widening the range of specialisms, modalities and price points they can offer. Some grow to escape the isolation of solo work. Some grow for the eventual financial upside of earning from more than their own sessions. All three are valid, but the financial reward in particular tends to arrive later than people expect, because you are now carrying other people's overheads, admin and, in some models, their livelihoods.

The three models

UK group practices sit on a spectrum that runs from least to most control, and correspondingly from least to most responsibility.

The shared-space or chamber model. Each therapist runs their own independent practice and simply shares premises, and perhaps a name. Everyone holds their own insurance, registers as their own data controller, sets their own fees and keeps their own clients. For the founder, this is the lightest possible arrangement: very little admin, very little risk, and very little control over consistency or quality. The "practice" is really a collective of independents.

The associate model. This is the dominant pattern in UK private therapy. Associates are self-employed. The practice provides referrals, rooms, administration, invoicing and often supervision or continuing professional development, and takes a share of each session fee in return. Depending on what the practice offers, that share commonly runs from around twenty to fifty per cent. The model is flexible and avoids the obligations of being an employer, but it carries the two legal traps covered below, and those traps are precisely why so many practices that use it have never tested whether their version of it would survive scrutiny.

The employee model. Therapists are employed on PAYE, on a salary or a guaranteed base, sometimes with a performance element on top. You gain the most control over quality and consistency, and the strongest claim to the client relationship, but you take on the full weight of being an employer: payroll, pension auto-enrolment, holiday pay, sick pay, employers' liability insurance, and a higher and rising exposure to dismissal claims.

On how people are paid, the range is wide and the UK market is highly variable. Some practices work on a fifty-fifty basis, others at sixty-forty or seventy-thirty, and room-rental arrangements sit outside the split logic altogether. Many practices aim for a split that leaves the clinician with around fifty-five to sixty-five per cent where substantial support is provided, although arrangements vary considerably. Hybrid models that pair a modest guaranteed base with a split are also growing, mainly because they help with retention.

Trap one: employment status

This is the point most articles skip, and it is the one that costs the most. Simply describing someone as self-employed in a contract does not settle either their tax status or their employment rights. UK law recognises three broad categories: employee, worker, and self-employed contractor, and the relationship between someone's tax status and their employment-law status is not always neat. What matters in both cases is the reality of the working relationship rather than the label on the paperwork. If the day-to-day arrangement looks like employment, a tribunal or HMRC can treat it that way regardless of what both parties signed.

The factors that point towards genuine self-employment are worth understanding in plain terms. A genuinely self-employed associate can usually send a substitute or bring in others to do the work. They have real control over how, when and where they work. There is no mutuality of obligation, meaning the practice is not required to offer work and the associate is not required to accept it. They carry their own financial risk, use their own equipment where relevant, market themselves and are free to work for other practices.

For a therapy practice, the tension is immediate. A substitution clause sits awkwardly with clients who are carefully matched to one therapist. Control creeps in the moment you mandate a note format, a cancellation policy or a particular supervision arrangement. None of this makes the associate model unworkable, but it does mean the model has to be built deliberately, with the contract reflecting what actually happens in practice rather than an idealised version of it.

Trap two: VAT

This is the single most important point in the whole subject, and the most counterintuitive, because it runs opposite to what most therapists assume.

The exemption for medical care depends on being on a statutory register. Practitioner psychologists, who have been regulated by the Health and Care Professions Council since 2009, make VAT-exempt supplies, as do HCPC-registered arts therapists. Counsellors and psychotherapists, who are regulated through Accredited Registers overseen by the Professional Standards Authority rather than by statute, are not covered by that exemption. HMRC's own internal guidance is explicit on this point, and as recently as January 2026 the Government confirmed in Parliament that it has no plans to extend the exemption to counsellors and psychotherapists who lack a statutory register. Their services are therefore taxable supplies for VAT purposes.

There are two reasons this surprises people, and both are worth understanding. The first is that most solo therapists never charge VAT, not because they are exempt but because their turnover sits below the registration threshold, so the taxable nature of the work never becomes visible. The second is that there is a genuine exception: where therapy is delivered under the direct supervision of a statutorily registered health professional such as a practitioner psychologist, or within a hospital or other qualifying medical setting, the supply can be exempt. Most private practices will not meet those conditions, but a group practice built around a registered psychologist might, which is one more reason the structure you choose has consequences that reach well beyond clinical delivery.

The consequence appears as a practice grows. Once a business's taxable turnover crosses the VAT registration threshold, it must register and then either add VAT to its fees or absorb it. The threshold is ninety thousand pounds of taxable turnover measured over any rolling twelve-month period, and it is the rolling nature that catches people out, because the test looks back from the end of every month rather than resetting with the tax year. In practice, registration turns a one hundred and twenty pound session into one hundred pounds plus twenty pounds of VAT, and since private clients cannot reclaim it, the twenty pounds comes out of either the client's pocket or the practice's margin.

There is also a structural point worth understanding, because how you build your team can affect what counts as your taxable turnover. In some structures, where the practice is acting as an agent rather than the principal supplier, it may be possible that only the commission element counts towards the practice's taxable turnover. However, the distinction is highly fact-specific and should be confirmed with a qualified accountant or VAT specialist. It is best understood as a reason to take proper advice early, not as a planning strategy to assume in advance.

Choosing a business structure

For the first year, most solo therapists trade as sole traders, because it is simpler and cheaper and easy to unwind if private practice turns out not to suit them. The usual prompt to revisit that comes later: many practitioners begin reconsidering the question when profits move into the region of fifty thousand pounds, or when they take on associates. Incorporating as a limited company adds administrative cost but can be more tax-efficient at higher profits, and it gives you a cleaner vehicle for employing people, holding contracts and separating your personal liability from the business. One thing incorporation does not do is avoid VAT: the threshold applies in exactly the same way to sole traders, partnerships and limited companies, because it is the turnover of the business that matters, not its legal form. A partnership is a fourth option, suited to two or more therapists who want genuinely shared ownership rather than an owner-and-associate hierarchy.

How your insurance changes

As a solo therapist you already hold professional indemnity and usually public liability cover, because the professional bodies require adequate insurance for anyone seeing clients. Growing changes the picture in two ways. The moment you employ anyone, even part-time, employers' liability insurance becomes a legal requirement. And because others are now practising under your practice's name, you need cover that reflects the practice's exposure to claims arising from their work as well as your own, alongside sensible consideration of management liability and cyber cover for holding a whole team's worth of sensitive records.

Data protection and who owns the client relationship

A solo therapist is a data controller, full stop, because you determine how client information is collected and stored. In a group practice the crucial and often-overlooked question is who the controller actually is: each associate independently, the practice, or both jointly. That decision drives who is liable for a breach, who registers and pays the data protection fee to the Information Commissioner's Office, who answers Subject Access Requests, and, commercially, what happens to the client relationship when a therapist leaves. If associates are independent controllers, it may be harder for the practice to retain the client relationship when a therapist leaves. If the practice is the controller, the records and the relationships are more clearly anchored to the practice. It is a question worth settling deliberately and in writing at the outset, not discovering when someone resigns. A useful technical note for any practice writing its policies: consent is frequently not the best lawful basis for processing in private practice, because it can be withdrawn, and contract is often more appropriate. Whatever basis you use, reportable personal-data breaches must normally be reported to the ICO within seventy-two hours of becoming aware of them, and that obligation now covers everyone on the team.

Clinical governance and supervision

This is where the clinical and the commercial meet most directly. Supervision is non-negotiable: BACP requires accredited members who are seeing clients to have a minimum of one and a half hours of supervision each month, with trainees supervised at higher ratios. The subtle governance point for owners is that clinical supervision is ideally kept separate from managerial supervision and from the organisation itself, so that the supervisor can remain independent of line management. An owner who wants to both manage and clinically supervise their own associates is stepping into a recognised conflict, and the cleaner arrangement is to keep those two hats on two different heads.

There is also the question of where responsibility sits. When supervising qualified and experienced practitioners, the weight of responsibility for ensuring the work meets professional standards rests primarily with the supervisee. Even so, the BACP Ethical Framework expects careful thought about how responsibilities for each client are allocated between supervisor, supervisee and any line manager, and about how those arrangements are explained to clients. For a practice owner, clarity about who holds clinical responsibility for each client is both an ethical requirement and, in practice, a form of protection.

A shifting employment-law backdrop

If you are weighing the employee model, one current change raises the stakes and is worth building into your thinking. The Employment Rights Act 2025 received Royal Assent in December 2025. From the first of January 2027, the qualifying period for ordinary unfair dismissal falls from two years to six months, and the cap on unfair dismissal compensation is removed. Employees who already have six months' service on that date gain protection immediately, which means anyone hired between now and the middle of 2026 will be covered from the start of 2027. Alongside this, employers must keep records of annual leave and holiday pay for at least six years from April 2026, and a range of family-leave and statutory-sick-pay protections are becoming day-one rights. None of this makes employing people a bad idea. It does mean that employing people well now demands tighter discipline: careful recruitment, robust contracts and properly run probation.

Because this area is still moving through commencement regulations, treat the specific dates above as accurate at the time of writing and worth a final check before you make a hiring decision that depends on them.

A hidden risk: where your referrals come from

One operational risk deserves a mention, because it sits behind a surprising number of struggling group practices. Practices often grow by recruiting associates before they have diversified where their work comes from. If the founder's reputation and marketing generate most of the referrals, then every new therapist depends on that single source, and the founder quietly becomes a bottleneck the whole practice leans on. Growing the team and growing the referral base are two different projects, and they need to happen together. Building referral routes that do not all run through one person, whether that means several therapists each cultivating their own networks, a broader online presence, or relationships with GPs, EAPs and local organisations, is what turns a busy founder with helpers into a practice that can stand on its own.

The part nobody warns you about

Underneath the legal and financial detail sits a quieter truth that every experienced practice owner recognises. The hardest part of going from solo to group is not the VAT registration or the contract drafting. It is the change in who you are at work. You move from holding only your own caseload to holding responsibility for a team of people who represent your practice and depend, in varying degrees, on your judgement. You recruit, you onboard, you supervise, and sometimes you have to let someone go. You build systems for intake, documentation, invoicing and cancellations that have to work for other people and not just for you. You become comfortable, eventually, with carrying responsibility for someone else's livelihood.

That shift is the real work of growing a practice, and it is worth naming honestly, because the therapists who find the transition hardest are usually the ones who expected it to be a business problem and discovered it was an identity one. The good news is that the administrative weight, which is genuinely heavy in the early months, is the part that systems and good support can carry for you. What remains is the work only you can do: deciding what kind of practice you want to build, and who you want to become in order to build it.