Partnerships and self-employed NIC
Finance Act 2025 · 2025/26
1 The partnership computation
In this TX lecture: The opening-year and terminal loss relief for individual partners, and the extension of trading loss relief against gains, are not examined in FTX.
2 Introduction
A partnership is a single trading entity, but for taxation purposes each individual partner is effectively treated as trading in his own right and is assessed on his or her share of the tax adjusted trading profit of the partnership.
It is essential to understand therefore that it is not the partnership itself that is assessed upon its tax adjusted trading profit, but it is each individual partner who will be assessed on his or her share of that tax adjusted trading profit.
Partners are assessed on a tax year basis - the same as sole traders.
3 Trading income
The default method of calculating the trading profit of the partnership is the CASH BASIS although the partnership can elect for the ACCRUALS BASIS to apply.
The partnership’s tax adjusted profits or loss for an accounting period (after capital allowances for the partnership) is computed in the same way as for a sole trader.
Partners’ salaries and interest on capital debited on the statement of profit or loss are not deductible as expenses as these are simply an allocation of trading profit by the owners of the business. These must be added back in the adjusted profits computation.
4 Allocation of the trading profit or trading loss
The adjusted trading income or trading loss is divided between the partners according to their profit sharing arrangements in force during the accounting period.
Partners may firstly be entitled to salaries and interest on capital (known as 'prior appropriations of profit'). The balance of any trading profit (or loss) remaining will then be allocated in the profit sharing ratio (PSR).
5 Partnership capital allowances
Capital allowances are deducted as normal in calculating the tax adjusted trading profit.
If assets are used privately by the partners, then as for a sole trader only the business proportion is included in the capital allowances computation.
Will and Grace are in partnership, sharing profits and losses equally after paying a salary to Will of £18,000 p.a. For the year ended 31 March 2025 the partnership had a trading loss of £30,000.
Total £ | Will | Grace | ||
Trading loss | (30,000) | |||
Salary to Will | (18,000) | 18,000 | ||
Balance | (48,000) | |||
Shared equally | (24,000) | (24,000) | ||
Trading loss | (30,000) | (6,000) | (24,000) |
6 A change in the profit sharing agreement
If the profit sharing agreement is changed during a period of account, the profit must be time apportioned before allocation under the different agreements.
Doug and Rob are in partnership. The trading income for the year ended 30 September 2025 was £18,000
Up to 30 June 2025 profits were shared between Doug and Rob 3:2, after paying salaries of £3,000 and £2,000 respectively per annum.
From 1 July 2025 profits were shared 2:1 after paying salaries of £6,000 and £4,000 respectively per annum.
Show the allocation of trading profits for the year ended 30 September 2025.
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Time-apportion the partnership’s profit where a profit-sharing agreement changes. Apply salaries/interest allocations to each sub-period, then share the remainder in that sub-period’s ratio.
A new partner is assessed on their allocated share from joining; a departing partner only on their share up to departure. Continuing partners’ shares change with the agreement. Each is assessed on the tax-year basis.
Allocate the partnership’s capital allowances before dividing profits. Do not deduct partner salaries twice; they are allocations of profit, not business expenses.
Amir and Bola share adjusted profits £60,000 for the year to 31 March 2026. Through 30 September 2025 the ratio is 3:2; from 1 October 2025 it is 1:1. There are no salary allocations. Compute each share.
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Chika joins Deepak’s business on 1 October 2025. Tax-adjusted profit for the 12 months to 31 March 2026 is £48,000 and arises evenly. Before joining Deepak owns all the profits; afterwards they share equally. Compute shares.
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7 Partners’ losses
Allocate a partnership loss under the partnership agreement, just as profit is allocated. Each partner may use their own share under s 64 against current/prior total income or s 83 against future profits of the same trade. The partners need not choose the same claim. Opening/terminal loss and gains extensions are excluded.
Esi and Farhan share losses equally. Their partnership loss for 2025/26 is £20,000. Esi has prior-year income; Farhan expects future trading profits. State each loss and the available choices.
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8 Self-employed earners
8.1 Class 4 contributions
Class 4 NIC applies to the self-employed individual’s taxable trading profits, not to an employee’s wages. It is normally due where the individual is aged 16 or over and below State Pension age at the start of the tax year.
The rates are given to you in the tax tables at the front of the exam - use them!
Class 4 | £1 - £12,570 per year | @ | 0% | |
£12,571 – £50,270 per year | @ | 6% | ||
£50,271 and above per year | @ | 2% |
Jerome, a trader, has a trading profit assessment of £60,000 for 2025/26.
Calculate his Class 4 NIC for 2025/26.
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Class 4 uses assessable trading profits, including the annual given transition amount under the FTX examination model. Unlike Class 1 it is an annual profits computation, not a weekly/monthly cash-wages charge. Class 4 has no employer element and no employment allowance; Class 2 is excluded.
Grace has assessable trading profits £60,000, including the given annual transition amount. Calculate 2025/26 Class 4 NIC.
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Amir and Bola share equally. Partnership tax-adjusted profit before capital allowances is £50,000; partnership allowances are £10,000. Compute each taxable share.
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Esi and Farhan share profits equally until Farhan leaves on 30 September 2025. Esi then owns all profits. Adjusted profit for the year to 31 March 2026 is £60,000 and arises evenly. Compute shares.

