Income Tax and National Insurance Contributions
The 22% syllabus area covering income sources, allowances, employment, trade, partnerships and NIC.
How to study the ACA Certificate Level
Use the current 2025-26 syllabus and exam pages, study every module, practise the relevant objective and scenario formats and keep ethics, sustainability and professional scepticism active across the whole level.
Core concepts
Concept 1
Classify taxable and exempt income and determine the available personal allowance.
Exam cue: Define the information, person, entity and requirement relevant to income tax and national insurance contributions.
Concept 2
Calculate employment income including straightforward benefits and director issues.
Exam cue: Select the current ICAEW syllabus principle, apply it to the evidence and show any required calculation.
Concept 3
Apply the badges of trade and adjust business profit for allowable expenditure and capital allowances.
Exam cue: Check the conclusion for professional scepticism, ethics, sustainability and practical consequences.
Risk pitfalls and guardrails
Treating income tax and national insurance contributions as a definition list without applying the supplied facts.
Guardrail: Do not use a former module name, retired rule, unsupported assumption or answer that ignores evidence quality, ethics, sustainability or timing.
Using a former ACA module label, retired scope or unsupported rule instead of the current syllabus.
Guardrail: Do not use a former module name, retired rule, unsupported assumption or answer that ignores evidence quality, ethics, sustainability or timing.
Ignoring an assumption, data limitation, ethical issue, deadline or effect on the financial conclusion.
Guardrail: Do not use a former module name, retired rule, unsupported assumption or answer that ignores evidence quality, ethics, sustainability or timing.
Memory anchors
Income Tax and National Insurance Contributions - Scope
Classify taxable and exempt income and determine the available personal allowance.
Income Tax and National Insurance Contributions - Rule
Calculate employment income including straightforward benefits and director issues.
Income Tax and National Insurance Contributions - Method
Apply the badges of trade and adjust business profit for allowable expenditure and capital allowances.
Income Tax and National Insurance Contributions - Risk
Allocate partnership profit and calculate commencement, continuing and cessation assessments.
Income Tax and National Insurance Contributions - Action
Calculate Income Tax and employee, employer and self-employed National Insurance.
Checkpoint rule
Do the check-up only after you can summarize each concept in one sentence and identify one dangerous pitfall from memory.
Knowledge Check (after reading)
Short check-up to confirm understanding of this module.
Check-up Questions
For 2025/26, an individual has salary £30,000 and no other income. Using a £12,570 personal allowance and 20% basic rate, what is Income Tax?
For 2025/26, taxable non-savings income after allowances is £42,000. The basic-rate band is £37,700 at 20% and the excess is taxed at 40%. What is tax?
Answer all questions to submit.
Next step personalized recommendations
Continue learning
Move forward only after this module is stable.
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