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ACCA Applied Skills · Taxation (UK)

Comprehensive Income Tax Computation for ACCA TX-UK

The income tax computation adds up non-savings, savings and dividend income, deducts reliefs and the personal allowance, then taxes the result band by band. Non-savings income is taxed first, then savings, then dividends. You then subtract tax reducers and add any extra charges to find tax payable.

What this chapter covers

This chapter pulls the whole of income tax into one working. You list each type of income, deduct reliefs, apply the personal allowance, tax each slice at the right rate, and finish with the tax payable. Every earlier income tax topic, such as employment, trading and property income, feeds into this one layout.

The chapter also covers the adjustments that change the numbers: Gift Aid and pension contributions that extend bands, the cap on income tax reliefs, loss relief, the child benefit charge, marriage allowance and tax reducers. Each adjustment has its own rule, but all of them sit inside the same computation.

It connects to the rest of the paper in two ways. Income tax computations are a core part of the constructed response questions in Section C. The same rates and bands also underpin objective test questions in Sections A and B, and later topics such as national insurance and capital gains tax use the taxable income figure you build here. The rates and allowances are given in the exam, so your effort should go on applying them correctly.

This is the chapter where income tax knowledge turns into a final number. A long Section C question often asks for a full computation, and objective test questions regularly test one step of it, such as the personal allowance at high income or the effect of a Gift Aid payment. Objective questions are all or nothing, so a wrong band or order of taxation costs the full marks. A clear layout also earns method marks in written answers, even when one figure is wrong. Mastering this chapter pays off across the whole paper.

The comprehensive computation of taxable income and income tax liability: topics in the order to study them

  1. 1Income Tax Computation Format and Types of IncomeEverything else is a step inside this layout, so learn the columns for non-savings, savings and dividend income first.
  2. 2Personal Allowance and Its RestrictionThe allowance is the first deduction you make, and you must know when it is reduced or lost at higher incomes.
  3. 3Income Tax Rates, Bands and Order of TaxationWith taxable income known, you apply rates and nil rate bands to each income type in the correct order.
  4. 4Gift Aid, Pension Contributions and Band ExtensionThese payments widen the basic rate band, so you need the basic band mechanics in place before adjusting it.
  5. 5Cap on Income Tax Reliefs and Loss Relief DeductionsReliefs come off total income, so you study them once the basic computation is secure, and then check the cap.
  6. 6Child Benefit Income Tax ChargeThis charge depends on adjusted net income, which uses the figures and extensions you have already met.
  7. 7Marriage Allowance, Married Couples and Tax ReducersTax reducers come off the tax liability itself, so they belong after the liability is calculated.
  8. 8Tax Payable, Payments on Account and InterestThis is the final step: turn the liability into amounts due, and when and with what interest.

How to prepare The comprehensive computation of taxable income and income tax liability

Build the chapter around one master computation, then add each rule as a layer. Practise on paper, as the layout matters as much as the arithmetic.

  1. Write out the computation layout from memory until you can do it in two minutes, with separate columns for non-savings, savings and dividend income.
  2. Learn the key rates and limits from the tax rates and allowances document so you know where to find them fast, not so you memorise every figure.
  3. Work through the personal allowance, bands and order of taxation with short drills: low, middle and high income examples.
  4. Add one adjustment at a time: Gift Aid, pension contributions, reliefs, child benefit charge, then tax reducers. After each, redo a full computation.
  5. Practise objective test style questions on single steps, such as which income is taxed first or when the allowance starts to reduce, and check why each wrong option is wrong.
  6. Do full Section C questions under time. Show every working figure and label each line so you collect method marks.
  7. Finish by calculating tax payable, payments on account and interest, then recheck that the final figure follows from your earlier lines.

Common mistakes in The comprehensive computation of taxable income and income tax liability

  • Taxing income in the wrong order

    Fix: Always take non-savings first, then savings, then dividends, and fill bands in that order.

  • Forgetting to restrict the personal allowance at high income

    Fix: Calculate adjusted net income first whenever income may exceed £100,000, then apply the reduction rule.

  • Deducting Gift Aid or pension payments from income

    Fix: Extend the basic rate band by the gross amount instead, and check whether the payment also affects adjusted net income.

  • Ignoring the cap on income tax reliefs

    Fix: Add the reliefs that are capped and compare the total to the higher of £50,000 or 25% of income.

  • Applying a tax reducer against income

    Fix: Put tax reducers below the tax liability line and deduct them there.

  • Skipping workings in Section C

    Fix: Label each line and show each calculation so a single slip costs one mark, not the whole question.

Last-day revision: The comprehensive computation of taxable income and income tax liability

  • Layout: non-savings income first, then savings, then dividends, each in its own column.
  • Taxed order: non-savings, then savings, then dividends. Allowance is set against non-savings first.
  • Personal allowance is £12,570 and starts to reduce once adjusted net income passes £100,000.
  • The allowance is zero where adjusted net income is £125,140 or more.
  • Basic rate band is £37,700; higher rate runs to £125,140; additional rate above that.
  • Normal rates are 20%, 40% and 45%; dividend rates are 8·75%, 33·75% and 39·35%.
  • Savings nil rate band is £1,000 for basic rate and £500 for higher rate taxpayers; dividend nil rate band is £500.
  • Savings starting rate of 0% applies only to savings income within the first £5,000 of taxable income.
  • Gift Aid and pension contributions extend the basic rate band rather than reducing income.
  • Reliefs are capped at the higher of £50,000 or 25% of income, unless otherwise restricted.
  • Child benefit charge applies at income between £60,000 and £80,000: 1% of child benefit for every £200 over £60,000.
  • Tax reducers come off the tax liability, not off income.

The comprehensive computation of taxable income and income tax liability practice questions

The comprehensive computation of taxable income and income tax liability in other exams

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

The comprehensive computation of taxable income and income tax liability: frequently asked questions

What order is income taxed in for the income tax computation?

Non-savings income is taxed first, then savings income, then dividend income. Each type uses the bands left after the previous one. This order matters for nil rate bands and for which rate each slice attracts.

When is the personal allowance reduced?

It is reduced where adjusted net income is above £100,000. Where adjusted net income is £125,140 or more, the allowance is reduced to zero. Check adjusted net income, not just taxable income.

Do Gift Aid and pension contributions reduce taxable income?

No. They extend the basic rate band, so more of your income is taxed at the basic rate. They can still affect adjusted net income, which matters for the allowance and the child benefit charge.

How is the child benefit income tax charge worked out?

It applies where income is between £60,000 and £80,000. The charge is 1% of the child benefit received for every £200 of income over £60,000.

Do I need to memorise the tax rates for TX-UK?

ACCA provides the rates and allowances in the exam, so you do not need to memorise every figure. You do need to know where each one is and when to apply it.