Allowable expenses, clinic and home-office costs, supplements and testing, insurance, NIC, VAT and MTD explained for UK self-employed nutritional therapists.
A nutritional therapy practice looks simple from the outside, one practitioner, a handful of clients, a quiet consultation room, but the tax picture has more moving parts than most realise. You may charge for an initial consultation and shorter follow-ups, run packages, sell or dispense supplements at a margin, recharge functional tests you order through a lab, and perhaps add corporate workshops or online courses. Each of those is income, and some carry their own costs that need separating cleanly. Get the bookkeeping right as money and supplements move, and the annual return becomes a tidy summary rather than a January scramble.
This guide is written for the self-employed nutritional therapist working under their own name or a small clinic brand. It covers how your profit is taxed, the specific costs you can claim, the supplement-and-testing trap that catches dispensing practices, National Insurance, the VAT exemption question, and what Making Tax Digital changes for you.
As a sole trader you pay Income Tax on profit, which is your total clinic income minus allowable expenses. For 2025/26 the personal allowance covers the first GBP 12,570, then you pay 20% to GBP 50,270, 40% to GBP 125,140 and 45% above, with the personal allowance tapering away between GBP 100,000 and GBP 125,140 to create an effective 60% band. Class 4 National Insurance is 6% on profit between GBP 12,570 and GBP 50,270 and 2% above, with Class 2 NIC settled through Self Assessment.
Scottish practitioners pay Scottish Income Tax on profit through six bands (19%, 20%, 21%, 42%, 45% and a 48% top rate) and carry an S-prefixed tax code, while National Insurance stays UK-wide. Welsh practitioners have a C-coded tax code at rates currently matching the rest of the UK. If you also hold a PAYE job, perhaps part-time work at a health-food shop, gym or NHS role, that employment may already use your personal allowance, which distorts how much of your therapy profit is taxed. If your code looks wrong, run it through the tax code checker.
Many therapists build a practice slowly, seeing a few clients in the evenings while keeping another job. The GBP 1,000 trading allowance is made for that stage. If your gross self-employed income from all consulting and dispensing is GBP 1,000 or less in a tax year, it is tax-free and you do not need to register for Self Assessment for it. Cross GBP 1,000 and you must register and report the full amount, even if therapy is still a sideline. Our note on side hustle income covers the registration step in plain terms.
Once you are over the threshold you choose each year. You can deduct the flat GBP 1,000 trading allowance instead of working out actual expenses, which suits a low-cost online-only practitioner. Or you can deduct your real allowable expenses if they exceed GBP 1,000, which most established therapists do once insurance, registration and clinic hire are added up. You cannot do both, so total your costs and pick whichever leaves the lower profit.
An expense is allowable when incurred wholly and exclusively for the business. For a nutritional therapist the list is dominated by professional, premises and software costs rather than equipment.
| Expense | What qualifies | Notes |
|---|---|---|
| Professional insurance | Professional indemnity and public liability cover | Essential and fully deductible |
| Registration and membership | CNHC registration, BANT, ANP or NTOI membership | Allowable where relevant to the trade |
| Clinic and room hire | Sessional hire of a treatment room or clinic space | Fully deductible business premises cost |
| Home-office costs | HMRC flat-rate working-from-home allowance, or a fair share of heat, light, broadband, rent or mortgage interest | Choose the larger fair deduction |
| Software and platforms | Practice-management, secure client records, video consultation, online booking and diet-analysis tools | Subscriptions are fully deductible |
| Functional testing | Lab tests ordered specifically for a paying client | A direct cost of that service; recharge is taxable income |
| Supplements (for clients) | Stock dispensed or resold to clients at a margin | Treated as stock, not your personal supplements |
| Equipment | Scales, body-composition monitor, laptop, consulting-room furniture | Usually claimed via the Annual Investment Allowance |
| Reference and CPD | Nutrition texts, journals, courses that update existing skills | New-trade training is not allowable |
| Travel | Mileage and parking for clinics, home visits and corporate gigs | Ordinary commuting is not allowable |
| Marketing and website | Practice website, booking page, hosting, leaflets, directory listings | Fully deductible running costs |
| Phone, accountancy and bank fees | Business share of mobile, bookkeeping, business banking | Deduct the business proportion only |
This is where dispensing practices trip up. Supplements and lab tests are deductible only when bought for a specific paying client. If you order a test through a lab and recharge the client, the lab fee is a direct business cost and the amount you charge them is taxable income, report both. The same applies to supplements you dispense at a margin: the wholesale cost is a business cost, the retail price you charge is income. Supplements you take yourself, however well they inform your practice, are private and not allowable. Keep every supplier invoice and tie each purchase to the client it was for, so the business purpose is obvious if HMRC ever asks.
Many therapists split their week between a hired clinic room and home-based consultations or admin. Clinic-room hire is straightforwardly deductible. For the home side, you can use HMRC's simplified flat rate based on hours worked at home each month, which needs no receipts, or claim an actual proportion of household running costs (heat, light, broadband and a share of rent or mortgage interest) based on the rooms used and time spent working. Work it out both ways once and use the larger fair figure. If you turn a spare room into a dedicated consulting space, claim the running-cost share rather than the full room cost.
The private share of dual-use broadband, phone and devices must be excluded. Your own supplements, gym membership and personal health products are not allowable, even though they keep you informed. Everyday clothing is never deductible, although branded clinic uniform or protective aprons used in practice can be. And training to enter a brand-new specialism is treated differently from CPD that updates your existing skills, only the latter is allowable.
A growing practice rarely earns from one thing. Use the multiple-income tax calculator to see how the streams stack on top of each other.
| Income type | How it is usually taxed | Watch out for |
|---|---|---|
| Consultation and follow-up fees | Self-employment trading income | Record the gross fee even when paid by app or card |
| Programmes and packages | Trading income, often paid upfront | An upfront package is taxable when received, not when sessions are delivered |
| Supplement and product sales | Trading income (standard-rated for VAT) | Report retail price as income; cost as expense |
| Recharged lab tests | Trading income | Recharge is income; the lab fee is your cost |
| Corporate workshops and talks | Trading income | Travel to the venue is deductible; commuting is not |
| Online courses and ebooks | Trading income | Digital products may have different VAT treatment than therapy |
| PAYE clinic or NHS role | Employment income, taxed at source | Your tax code may already use your personal allowance |
On top of Income Tax you pay National Insurance on your profit. Class 4 NIC is 6% on profit between GBP 12,570 and GBP 50,270 and 2% on profit above that, calculated automatically within your Self Assessment. Class 2 NIC is now settled through Self Assessment too, and matters because it protects your entitlement to the State Pension and certain benefits. If your profit is below the small-profits threshold you can still choose to pay Class 2 voluntarily to keep your contribution record intact, which is often worth doing in a lean early year. National Insurance is UK-wide, so Scottish and Welsh practitioners pay the same Class 4 and Class 2 as everyone else even though their Income Tax differs.
Take a practitioner who hires a clinic room two days a week, sees clients online the rest of the time, and dispenses supplements at a margin, totalling GBP 36,000 of income for the year.
Income: GBP 36,000 (consultations GBP 26,000, packages GBP 6,000, supplement and test recharges GBP 4,000)
Allowable expenses:
Taxable profit: GBP 36,000 minus GBP 10,100 = GBP 25,900
Income Tax: GBP 25,900 minus GBP 12,570 = GBP 13,330 at 20% = GBP 2,666
Class 4 NIC: GBP 13,330 at 6% = GBP 800
Total tax and NIC: GBP 3,466 for the year. Run your own figures through the sole trader tax calculator to sanity-check the numbers and set aside the right amount each month rather than facing a surprise in January.
For a nutritional therapist, the easy money to lose is the supplement and test recharge. Treat the cost as an expense and the recharge as income, match every purchase to a client, and your margins and your tax both stay clean.
You must register for VAT once taxable turnover exceeds GBP 90,000 in any rolling 12-month period. Two things make this less simple than it looks for therapists. First, nutritional therapy delivered by a registered practitioner can fall under the medical-care VAT exemption, which keeps consultation fees outside VAT, but the position depends on your qualifications and how care is provided, so confirm it rather than assume it. Second, reselling and dispensing supplements is a standard-rated supply of goods that always counts toward the GBP 90,000 threshold. A busy dispensing practice can therefore approach the threshold on product sales alone even while its consultation income is exempt. Track exempt and taxable income separately so you know where you stand.
Making Tax Digital for Income Tax Self Assessment replaces the once-a-year return with quarterly digital submissions and a year-end finalisation. The thresholds are based on gross income, not profit:
For a therapist this is a real change of habit. Instead of pulling a year of consultation fees, package payments and supplement sales together each January, you record each transaction digitally as it happens and send HMRC a summary every quarter. The upside is that a practice with mixed income, fees plus product sales plus recharges, becomes far easier to keep straight when it is captured continuously rather than reconstructed at year end. Our guide to MTD for sole traders walks through what the quarterly rhythm looks like in practice.
Not registering once over GBP 1,000. The trading allowance is a threshold, not a free pass at any level. Cross it and you must register for Self Assessment, even if therapy is a sideline.
Claiming personal supplements. Only supplements bought for a specific paying client are deductible. Your own are private spending.
Netting off supplement and test recharges. Report the full retail price or recharge as income and the cost as a separate expense, otherwise your turnover and margins are understated.
Assuming therapy is automatically VAT-exempt. The medical-care exemption depends on your status and delivery, and supplement sales are standard-rated regardless, so check both before relying on exemption.
Treating an upfront package as future income. A programme paid in advance is taxable when received under your chosen basis, not spread over the sessions you later deliver.
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