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ACCA Strategic Professional · Advanced Taxation (UK)

Income Tax: Income from Self-Employment for ATX-UK

Income from self-employment covers how a sole trader or partner's taxable trading profit is found and taxed. You adjust accounting profit, deduct capital allowances, allocate profit to tax years using basis period rules, apply losses, then add National Insurance and pension reliefs. Learn the order and practise it on full scenarios.

What this chapter covers

This chapter is about how an unincorporated business owner is taxed in the UK. You start with the accounting profit and adjust it for tax. You then deduct capital allowances, place the profit into tax years, and share it between partners. Losses, National Insurance, pension contributions and the tax cost of selling or closing the business complete the picture.

In ATX-UK, this chapter rarely stands alone. A Section A case study may ask you to compute the trading income of a client, then work out income tax, Class 4 NIC and the effect of a pension payment. Another part of the same case may ask whether incorporating is better. You need to link this chapter with personal income tax, capital gains tax, corporation tax and inheritance tax.

The tax tables ACCA gives you in the exam include capital allowance rates, income tax bands, NIC rates, pension limits and the cap on income tax reliefs. They do not tell you which to use or how. Your job is to apply them to the facts, explain your reasoning and give clear advice.

Self-employment income is a building block for much of ATX-UK. Trading profit feeds into the income tax computation, NIC, pension relief, loss planning and incorporation advice, so errors early in the chain carry through the whole answer. The exam is written, with 20 professional skills marks out of 100, so you also earn marks for clear advice, sensible recommendations and noting what extra information you need. A student who has the mechanics secure can spend exam time on analysis, which is where the harder marks are.

Income tax: income from self-employment: topics in the order to study them

  1. 1Adjustment of Profits for Sole Traders and PartnersEvery other topic starts from the adjusted trading profit, so you must be fast and accurate here first.
  2. 2Capital Allowances and Structures and Buildings AllowanceAllowances are deducted in the profit computation, so they come straight after adjustment of profits.
  3. 3Basis Periods and Opening and Closing Year RulesOnce you have profit for an accounting period, you must assign it to tax years, and this affects losses and overlap.
  4. 4Partnerships and Limited Liability PartnershipsPartnership profit is shared out and then taxed on each partner using the same basis period rules you have just learned.
  5. 5Trading Losses and Relief OptionsLoss relief needs the profit, year and partner position to be clear, and it ties to the cap on income tax reliefs.
  6. 6National Insurance for the Self-EmployedClass 4 uses the adjusted profit, so it is easier once the profit rules are secure, and it feeds the incorporation comparison.
  7. 7Pension Contributions and Reliefs for TradersPension relief depends on relevant earnings and the tax position, so you need the earlier income tax work first.
  8. 8Business Reliefs: Incorporation, Cessation and DisposalThis pulls everything together with capital gains, so study it last and use it to test your overall understanding.

How to prepare Income tax: income from self-employment

Work in layers: learn the mechanics, then practise them inside realistic scenarios, then practise explaining your advice.

  1. Read the ACCA tax tables first and note where capital allowances, income tax bands, NIC rates, pension limits and the cap on reliefs appear, so you can find them quickly in the exam.
  2. For each topic, learn the rule and then do short calculations until you can set out the layout without thinking.
  3. Practise a full trading income computation from accounting profit to tax payable, including Class 4 NIC, in one sitting.
  4. Draw a timeline for opening, closing and loss questions. Mark accounting periods, tax years and overlap before you calculate.
  5. Attempt past Section A style questions in time. After each, check technical marks and then your professional skills marks separately.
  6. Practise short written advice, such as which loss relief to claim or whether to incorporate. State the options, compare the tax effect and give a clear recommendation.
  7. Keep a one-page list of conditions and time limits for each relief, and review it weekly.

Common mistakes in Income tax: income from self-employment

  • Starting with the wrong profit figure or skipping adjustments.

    Fix: Use a standard layout every time: accounting profit, add backs, deductions, capital allowances, then adjusted profit.

  • Using the wrong capital allowance rate or pool.

    Fix: Check each asset type against the tax tables and label the pool in your working.

  • Getting the basis period or overlap wrong in opening and closing years.

    Fix: Draw a timeline first and mark the tax years, then allocate profits before you calculate.

  • Claiming loss relief without considering the effect on allowances and the reliefs cap.

    Fix: Compare the options in numbers and mention the cap, the personal allowance and timing in your recommendation.

  • Ignoring NIC and pension effects in a self-employment scenario.

    Fix: After computing income tax, always ask whether Class 4 NIC and pension contributions are relevant to the requirement.

  • Giving calculations without advice, so professional skills marks are lost.

    Fix: Answer the requirement directly, apply it to the client's facts, and give a reasoned recommendation in clear language.

Last-day revision: Income tax: income from self-employment

  • Start every trading income question with accounting profit, then add back disallowable items and deduct non-trading income.
  • Capital allowances in the tax tables: main pool 18%, special rate pool 6%, structures and buildings allowance 3% straight line.
  • The annual investment allowance is 100% up to an expenditure limit of £1,000,000.
  • Car allowances depend on CO2 emissions, so check the emissions band before choosing the rate.
  • Show all workings, work to the nearest £ and apportion to the nearest month, as the supplementary instructions state.
  • Class 4 NIC: nil to £12,570, 6% to £50,270, then 2% above that.
  • Class 1A is 15%, and the employment allowance is £10,500.
  • Pension relief: the annual allowance is £60,000, with a £3,600 maximum contribution that qualifies without earnings.
  • Income tax reliefs are capped at the higher of £50,000 or 25% of income, unless otherwise restricted.
  • Business asset disposal relief taxes qualifying gains at 14%, with a £1,000,000 lifetime limit.
  • Personal allowance is £12,570 and is reduced to zero when adjusted net income reaches £125,140.
  • End each advice answer with a clear recommendation, and state any assumptions you have made.

Income tax: income from self-employment practice questions

Income tax: income from self-employment in other exams

The same ground in other exams, if you are preparing for more than one or want another angle on it.

Income tax: income from self-employment: frequently asked questions

How does this chapter appear in the ATX-UK exam?

It usually appears inside a scenario in Section A or Section B. You may need to compute trading profit, tax and NIC, then advise on loss relief, pension payments or incorporation. Expect to combine it with other taxes.

Do I need to memorise the tax rates?

No, ACCA provides tax tables in the exam. You still need to know where each rate is and when to use it. Practise with the tables open so you do not lose time searching.

Which topic should I study first?

Start with adjustment of profits, because every other topic depends on the adjusted trading profit. Then move through capital allowances and basis periods before losses, partnerships and the later topics.

How do I score the professional skills marks here?

Answer the exact requirement, use the client's facts, and give a clear recommendation. Show analysis by comparing options, and show scepticism by pointing out missing information or assumptions.

Is incorporation advice part of this chapter?

Yes, the final topic covers business reliefs on incorporation, cessation and disposal. It links to capital gains tax and corporation tax, so revise those alongside it.