What a partnership tax return actually is
Most UK GP practices and dental practices that operate with more than one principal trade as a general partnership. A few use a limited liability partnership (LLP) structure, and a smaller minority incorporate, but the unincorporated partnership is still the working norm for traditional GP surgeries and family-owned dental practices.
From HMRC's point of view, a partnership is transparent for tax. The practice itself pays no income tax or National Insurance. It files one return that shows the total trading profit for the year and how that profit was carved up between the partners. Each partner then picks up their share on their own self-assessment return and pays personal income tax and Class 4 NIC on their slice. This is fundamentally different from a limited company, where the company pays corporation tax first and only the dividend portion lands on the shareholder's personal return.
For a typical three to six partner GP surgery on a General Medical Services (GMS) or Personal Medical Services (PMS) contract, plus the usual mix of QOF, enhanced services, private fees and dispensing income, the partnership return is the single most consequential document of the tax year. It locks in profit allocations, drives every partner's personal tax bill, feeds the NHS Pension certificate and sets the baseline for any partnership change of profile mid-year. The same is true for a dental partnership operating under an NHS contract plus private mix.
Most healthcare partnerships we onboard at LOYALS have been doing the return for years and have a workable rhythm. What they often do not have is a year-end tax planning conversation that catches the £6,000 to £18,000 a partner can quietly leak through allocation timing, NHS Pension miscalculation or missed expense categories. The full LOYALS healthcare view sits on our healthcare accountants hub.
The SA800 cycle and the 31 January deadline
The partnership tax return form is SA800. Each partnership has its own Unique Taxpayer Reference (UTR), separate from the partners' personal UTRs. HMRC sends a notice to file each spring after the tax year ends.
The SA800 shows turnover, allowable expenses, the resulting trading profit, plus any other partnership income (bank interest, rental income from a partnership-owned surgery building, etc.). Each strand of income is then allocated to the partners in line with the partnership agreement and shown line by line on the partner pages of the SA800.
For the 2025/26 tax year, ending 5 April 2026 for most practices, the deadlines run as follows. Paper SA800: due 31 October 2026. Online SA800: due 31 January 2027. Each partner's personal SA100 with the SA104 partnership pages: also 31 January 2027. Class 2 NIC was abolished from 6 April 2024 so it no longer features. Class 4 NIC for 2025/26 is 6 percent on partner profit shares between £12,571 and £50,270, then 2 percent above.
The catch most practices miss is that the late filing penalty is charged per partner, not per partnership. A simple £100 penalty looks small. On a five-partner practice it lands as £500, then escalates if late filing continues. We see this happen roughly once a quarter with new clients who came across from a non-specialist firm that missed the partnership-specific deadline diary.
Profit allocation, fixed shares and prior charges
The partnership agreement (the deed) sets the rules for how the trading profit splits each year. There is no single right model. The structures we see across UK GP and dental partnerships fall into four working patterns.
1. Equal shares after prior charges
The most common arrangement. Specific items come off the top first as "prior charges" (typically the senior partner's parity share, any partner taking a Practice Manager role, or partners with extra clinical responsibilities), then the remainder splits equally between all parity-share partners. This works cleanly when partners contribute similar hours and skill levels.
2. Fixed percentage shares
Each partner has a fixed share in the deed (35 / 35 / 30 percent, for example). All profit splits in line with those fixed shares regardless of work pattern. This works when the partners value certainty over fairness-by-effort and accept that workload variance evens out over time.
3. Seniority-based parity progression
Newer partners start on a fraction of full parity (often 60, 70 or 80 percent) and step up annually until they hit full parity after three to five years. Common in larger GP partnerships and any practice that wants to test partnership fit before locking in equal shares.
4. Hybrid with notional rent and dispensing carve-outs
The clinical profits split one way, but specific income streams (notional rent on a partner-owned surgery property, dispensing profits on a separate dispensary income, private fees retained by the partner who earned them) split differently or sit with named partners. This needs careful drafting in the deed and careful SA800 line allocation, but it accommodates the messy economic reality of mixed-income healthcare practices.
The SA800 must show the exact allocation actually used for the period. HMRC explicitly does not allow retrospective profit re-allocation between partners to manage tax band exposure. HMRC's Business Income Manual at BIM82055 confirms the position. If you want to change the profit-sharing model, the deed must be amended and the change must take effect before the period the new allocation covers.
Allowable expenses inside a GP or dental partnership
The same "wholly and exclusively for the trade" test applies as for any other UK business, but healthcare partnerships have a distinctive expense profile worth knowing.
The categories we see understated most often on partnership tax returns prepared elsewhere include the following.
- Locum cover. Self-employed locum fees, locum agency invoices, holiday and sickness cover for partners. Fully deductible against partnership profit. Keep clear invoices showing the engaging partnership, not the individual partner, as the payer.
- Premises costs. Notional rent reimbursement from the NHS England Premises Costs Directions is taxable income but offset by partner-funded mortgage interest, repairs, insurance and rates. For partnerships owning the surgery building inside the partnership, depreciation is added back but capital allowances can apply on integral features.
- Equipment via the Annual Investment Allowance (AIA). Dental chairs, X-ray equipment, autoclaves, GP consulting room kit, clinical computers, defibrillators. Up to £1 million per year qualifies for 100 percent first-year write-off. A £40,000 dental chair purchased in the year saves around £18,000 of partner tax across the partner group at higher rates.
- Professional indemnity. MDU, MPS, Dental Protection subscriptions. Deductible at the partnership level when the partnership pays them on behalf of partners; otherwise individually deductible by the partner on their personal return.
- GMC, GDC and CQC fees. Registration and inspection fees deductible.
- Training and CPD. Courses, conferences, journals and membership of clinical specialty bodies, where genuinely related to the existing trade. Initial qualifications are not deductible.
- Salaried clinical and admin staff costs. Including employer NIC at 13.8 percent above the £5,000 secondary threshold for 2025/26, employer pension contributions and the £10,500 Employment Allowance where the practice qualifies.
- Practice accountancy and legal fees. Deductible. Personal tax return fees for partners are technically a personal cost but are often paid by the partnership as part of the engagement.
- Motor and travel. Partnership-owned vehicles and partner-owned cars used on partnership business. Home visits, branch travel between sites, conference travel. The 45p per business mile simplified scheme is the cleanest approach for partner-owned cars.
The categories we see overstated or wrongly claimed include personal lifestyle costs paid through the practice account, training for new clinical qualifications (a barrier to deduction under the "duality of purpose" test), and home office claims that do not pass the "used wholly and exclusively" test. We rebuild these every onboarding.
NHS Pension, superannuation and the PIA interaction
This is where partnership tax planning earns its keep. The NHS Pension Scheme rules on partnership profits are nuanced and the interaction with the annual allowance is where partners get caught.
Each GP partner submits an annual Type 1 Pensions Certificate (or Type 2 for a salaried GP working in addition to the partnership role) declaring pensionable income to NHS Pensions. The pensionable figure for a partner is derived from their share of GMS, PMS, APMS and other qualifying NHS partnership income, with private income and certain other categories excluded. Employer and employee superannuation contributions both run through the partner's drawings account.
The annual allowance for pension contributions across all schemes is £60,000 per individual in 2025/26 (frozen from April 2023). For high-income individuals (broadly adjusted income over £260,000), the allowance tapers down by £1 for every £2 of adjusted income above the threshold, to a minimum allowance of £10,000. A GP partner having a good year on QOF achievement or a step-up to senior parity can easily push the pension input amount (PIA) past the allowance and trigger an annual allowance tax charge.
The Scheme Pays election lets the partner have NHS Pensions pay the tax charge directly out of their accrued pension benefits, rather than out of pocket. The election must be filed by 31 July following the tax year for the previous year. Mandatory Scheme Pays applies above £40,000 of charge, voluntary Scheme Pays applies below. Either way, it has to be elected actively. It does not happen by default.
For a full read on this, see our guide on NHS Pension annual allowance taper. The interaction between an unexpectedly strong partnership year and the tapered allowance is the single biggest hidden tax exposure in healthcare partnership accounting.
Not sure if your partnership tax return is being filed properly?
Most GP and dental partners we speak to want a quick sense-check on the SA800 their current firm is producing, especially on the profit allocation lines and the NHS Pension PIA modelling. A 5-minute WhatsApp conversation is usually enough to give you a steer before booking a longer call.
Message Kris on WhatsAppBasis period reform: what changed from 2024/25
For decades, UK partnerships could choose any accounting year-end and pay tax on the profits arising in the accounting period ending in the tax year. Many GP partnerships used 30 June or 31 March year-ends to fit historical NHS contract reporting cycles.
From 6 April 2024, that ended. The basis period reform fully kicked in. Every UK partnership now pays tax on the profits arising in the tax year itself, regardless of accounting year-end. Partnerships with a non-5-April year-end either changed their accounting period to align with the tax year, or now have to apportion profits across two accounting periods to fit the tax year. The 2023/24 transitional year carried a one-off acceleration of profits into that tax year, partly relievable over five years.
For 2025/26 onwards, the position is straightforward but the apportionment work is real for any practice that has not changed its year-end. We see two practical issues recur: practices producing the SA800 with apportionment errors that misstate the tax-year profit, and partners who joined or left mid-year being allocated profits on the wrong basis. Both create personal tax adjustments that arrive months later as unexpected bills.
The five mistakes that cost partnerships money
From the partnership accounts we onboard from non-specialist firms, five mistakes show up repeatedly.
1. Notional rent treated as net, not gross
Notional rent reimbursement from the NHS Premises Costs Directions is taxable partnership income. It is sometimes netted off against mortgage interest in the accounts and never properly grossed up on the SA800. The result is understated turnover and a recovery risk on enquiry.
2. NHS Pension certificates running months late
The Type 1 certificate ties back to the partnership SA800 profit allocation. If the SA800 finalises late, the certificate finalises late, and the partner's pension input amount on the personal return is wrong. On a strong-profit year, this can push a partner over the annual allowance without anyone noticing until the personal return is filed.
3. Profit allocation departing from the deed without an amendment
HMRC checks SA800 allocations against the partnership agreement on enquiry. A long-standing informal arrangement that has not been written into a deed amendment is vulnerable. We see this most often where a senior partner has stepped back and the others have been splitting profits more evenly without updating the document.
4. Capital allowances claimed on the partnership return but not flowed through
The AIA goes on the SA800, but the partner-level effect runs through on the SA104. A capital allowance claim made at partnership level and then not properly reflected on the partner pages overstates each partner's taxable profit on their personal return.
5. Class 4 NIC overpayment on partners over state pension age
Partners over state pension age (currently 66) are exempt from Class 4 NIC on their share of partnership profit. The exemption should be claimed automatically once HMRC has the partner's date of birth, but it does not always run cleanly. We have caught Class 4 NIC overpayments going back four tax years on inherited engagements.
How three common approaches compare for a GP or dental partnership
Here is how the three common approaches actually compare for SA800 work:
| What you get | DIY (software only) | Generic high-street accountant | LOYALS healthcare specialist |
|---|---|---|---|
| SA800 prepared and filed on time | ~ | ✓ | ✓ |
| NHS Pension Type 1 and Type 2 modelled | ✗ | ✗ | ✓ |
| Annual allowance PIA and Scheme Pays support | ✗ | ~ | ✓ |
| Deed review and prior-charge structuring | ✗ | ✗ | ✓ |
| Mon to Sat WhatsApp access to your account manager | ✗ | ✗ | ✓ |
| Fixed annual fee, no surprise bills | ✓ | ~ | ✓ |
This is why most multi-partner GP and dental practices move from a generic firm to a healthcare specialist after their first major NHS Pension surprise.
The 2026 and 2027 changes worth tracking
Three Budget 2025 changes touch GP and dental partnerships in the next two tax years.
Dividend rates rise by 2 percentage points from 6 April 2026. The ordinary rate moves from 8.75 percent to 10.75 percent, and the upper rate from 33.75 percent to 35.75 percent. This is relevant where partners also hold a related limited company on the side (a property investment SPV, a private practice limited company, a consultancy vehicle) and draw dividends from it.
MTD for Income Tax becomes mandatory from 6 April 2026 for sole traders and landlords with gross income above £50,000. Partners trading purely through the partnership are outside MTD ITSA at partnership level (HMRC has confirmed partnership MTD is deferred). But any partner with separate self-employment income or rental income above the threshold is in scope on that other strand from April 2026 onwards.
Savings income gets new separate higher rates from 6 April 2027 at 22, 42 and 47 percent UK-wide. For partners with substantial savings interest on top of their partnership share, this widens the marginal rate on every pound of savings income inside the higher and additional bands. The order of allowances also changes from April 2027 so partnership profits are taxed first and savings (plus property and dividends) take the higher bands.
None of these on their own require a structural rethink of the partnership. They do change the year-end tax planning conversation, and they make the partnership annual review more valuable than ever from 2026 onwards.