Taxation (UK) · The use of exemptions and reliefs in deferring and minimising income tax liabilities

Tax Avoidance vs Evasion and Tax Planning Principles

Updated 11 October 2026 · Fact-checked

Tax planning uses reliefs and allowances as Parliament intended to reduce or defer tax. Tax avoidance uses artificial arrangements that follow the wording of the law but defeat its purpose. Tax evasion is illegal: hiding income or lying to HMRC. To answer exam questions, classify the action, then explain the risk and advice.

Understand Tax Planning Principles: Avoidance vs Evasion

Tax law lets you arrange your affairs to pay less tax, if you use the rules as Parliament meant. Claiming a pension contribution, using an ISA or using your personal allowance are examples. This is tax planning (also called mitigation). It is legal and expected.

Tax avoidance goes further. The person follows the letter of the law but uses artificial steps with no real commercial purpose, mainly to get a tax advantage. The aim defeats what Parliament intended. Avoidance is not a crime, but HMRC challenges it and the General Anti-Abuse Rule (GAAR) can counteract it. Your exam answer should say that avoidance is legal in form but carries serious risk.

Tax evasion is deliberate dishonesty. The person hides income, makes false claims, omits gains, or invents expenses. It is illegal and can lead to penalties, interest and prosecution.

A simple test: ask what was done and why. If the person only used a relief for the purpose it was designed for, it is planning. If the steps exist only to create a tax saving, it is avoidance. If facts are concealed or falsified, it is evasion.

Accountants also have ethical limits. You must not help a client evade tax. You must give honest, competent advice, keep to the fundamental principles (integrity, objectivity, professional competence and due care, confidentiality, professional behaviour) and be careful with schemes whose main purpose is tax saving. Where a client refuses to correct an error or is dishonest, you may need to stop acting and consider your reporting duties.

Key rules to remember

Tax planning (mitigation): Legal use of reliefs and allowances as intended = planning; Examples: pension contributions, ISAs, using the personal allowance and nil rate bands, transfers between spouses.
Tax avoidance: Within the letter of the law + artificial steps + main aim of a tax advantage = avoidance; Legal in form but can be counteracted, for example under the GAAR. Do not call it a crime.
Tax evasion: Deliberate dishonesty to reduce tax = evasion (illegal); Includes omitting income, false claims and false documents. Penalties and prosecution are possible.
Planning figures you may use: Personal allowance £12,570; basic rate band £37,700; cap on reliefs: higher of £50,000 or 25% of income; Use the rates and allowances ACCA provides. Planning is often shown by using these thresholds fully.
Pension planning limits: Annual allowance £60,000 (2023–24 to 2025–26); relief without earnings up to £3,600; A legitimate planning route if the client has earnings and room within the annual allowance.

How to solve Tax Planning Principles: Avoidance vs Evasion questions

Use this method for any question asking you to classify an action or advise a client on minimising tax.

1Read the scenario and list exactly what the client did or proposes to do.
2Ask whether any facts are hidden, omitted or false. If yes, it is evasion.
3If everything is disclosed, ask whether the relief is used as Parliament intended with real commercial or personal purpose. If yes, it is planning.
4If the steps are artificial and the main aim is a tax advantage, label it avoidance and mention the GAAR risk.
5State the consequences: for evasion, penalties, interest and possible prosecution; for avoidance, HMRC challenge and counteraction.
6Give ethical advice: refuse to assist with evasion, advise correct disclosure, and recommend genuine planning alternatives.
7Support the advice with numbers from the rates provided where the question asks for a saving.

Quickest way: Three-question classification

When to use it: Use it in Section A or B objective questions where you must pick planning, avoidance or evasion in under a minute.

Is anything hidden or false? If yes, choose evasion.
Is it a normal use of a relief with real substance? If yes, choose planning.
Is it artificial, with the main aim of a tax advantage? Choose avoidance.
Check the wording: 'legal but contrary to the spirit' points to avoidance.

Common mistakes in Tax Planning Principles: Avoidance vs Evasion

Calling tax avoidance illegal.
Students treat avoidance and evasion as the same thing.
Fix: Avoidance is within the letter of the law but can be challenged. Only evasion is a criminal matter.
Treating all tax saving as avoidance.
Students think any reduction in tax is suspicious.
Fix: Using ISAs, pensions or allowances as intended is acceptable planning.
Ignoring the ethical angle in written answers.
Students focus on the tax computation.
Fix: Add a line on integrity, honest advice and refusing to help with evasion.
Missing that non-disclosure makes it evasion.
Students focus on the amount, not the dishonesty.
Fix: Look for words such as 'does not declare', 'cash' and 'omit'. These signal evasion.
Recommending a contrived scheme in advice.
Students want to show the largest saving.
Fix: Recommend genuine, commercial steps and mention that artificial schemes risk challenge.

Worked examples

Example 1

Anna earns a salary of £70,000 and has not used pension relief. She asks you whether making a personal pension contribution is acceptable tax planning. Separately, her friend Ben received £6,000 of cash rental income and does not intend to declare it. Classify each and advise.

Show the solution

Anna: a pension contribution is a relief provided by law and used for its intended purpose. It is disclosed on her return. This is tax planning.
Ben: he is deliberately omitting income from HMRC. Hiding the income is dishonest. This is tax evasion.
Advice to Ben: the income must be declared. Failure risks tax, interest, penalties and possible prosecution. You must not help him conceal it and should encourage voluntary disclosure.
Advice to Anna: confirm she has earnings and is within the annual allowance of £60,000, then proceed.

Answer: Anna's contribution is legitimate tax planning. Ben's non-disclosure is illegal tax evasion, and you must not assist with it.

Example 2

A client plans a series of circular transactions with no commercial purpose, which satisfy the wording of the tax legislation and create a loss, solely to reduce tax. Explain what this is and how you should advise.

Show the solution

The steps follow the wording of the law, so there is no concealment. It is not evasion if everything is disclosed.
The transactions are artificial and have no commercial purpose. Their main aim is a tax advantage, so this is tax avoidance.
Parliament did not intend the relief to be used this way, so HMRC may challenge it and the GAAR could counteract the advantage.
Advise the client of the risk of challenge, extra tax, interest and possible penalties. Recommend genuine planning using normal reliefs instead.

Answer: This is tax avoidance: legal in form but artificial. It carries a real risk of HMRC challenge and counteraction, so advise on genuine alternatives.

Exam tips

In objective questions, look for the key words: 'conceal' or 'omit' means evasion, 'artificial' means avoidance, and 'as intended' means planning.
In written answers, define the term first, then apply it to the facts, then give the consequence.
Never say that avoidance is a criminal offence, and never say that planning is wrong.
Add an ethical sentence when you are asked to advise a client.

Practice questions from The use of exemptions and reliefs in deferring and minimising income tax liabilities

Tax Planning Principles: Avoidance vs Evasion in other exams

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

Tax Planning Principles: Avoidance vs Evasion: frequently asked questions

What is the difference between tax avoidance and tax evasion?

Avoidance uses the letter of the law in an artificial way to gain a tax advantage, and it is not a crime but can be challenged. Evasion is deliberate dishonesty, such as hiding income, and it is illegal.

Is tax planning legal in the UK?

Yes. Using reliefs and allowances as Parliament intended, such as pensions and ISAs, is legal and expected. It is different from artificial avoidance.

What should an accountant do if a client wants to evade tax?

You must not help. Advise the client to correct the position and make disclosure. If the client refuses, you may need to stop acting and consider your legal and professional reporting duties.

How is this topic examined in TX-UK?

It is mostly tested through objective questions that ask you to classify an action, and through short written parts of advice questions on ethics and planning.