CA Inter Paper 4 common mistakes
CA Inter Paper 4 · Understand the traps and how to avoid them.
Treating the previous year's assessment year as the current one when computing residential status and rates - for example, computing for AY 2024-25 while the paper is set for AY 2025-26, so the basic exemption limit, rebate under section 87A and surcharge slabs are all taken from the wrong Finance Act.
Candidates memorise a table of rates once and reuse it, and the paper often states the previous year only (e.g. 'Mr X earned income during 2024-25'), so the candidate must derive the assessment year. Under exam pressure the derivation step is skipped.
What to do instead
Before writing any computation, write the previous year and assessment year on the top of the answer sheet and cite the Finance Act applied. Keep a one-page 'current year only' sheet with the exemption limit, 87A rebate cap, surcharge rates and cess, and rebuild it from the latest Finance Act each attempt rather than carrying old notes.
Determining residential status from the number of days in India alone, ignoring the additional condition of 729 days in the preceding seven years for residents, and ignoring the deemed-resident rules for Indian citizens with Indian income above the prescribed threshold or visiting crew members.
The basic 182-day test is the only part practised repeatedly; the additional conditions and the deemed-resident provisions are learned as theory and never drilled in numerical form, so they are dropped from the working.
What to do instead
Always answer residential status in a fixed four-step template: (i) basic condition days, (ii) additional condition 730/729 days, (iii) deemed resident tests, (iv) conclusion (ROR/RNOR/NR) with the exact section cited. Practise at least ten full computations where the day count is deliberately near the 182 and 365 boundaries.
Computing house property income from the actual rent received without applying the gross annual value rules - not taking the higher of expected rent and actual rent, not deducting unrealised rent, and not applying the 30% standard deduction to the net annual value.
Candidates confuse municipal value, fair rent, standard rent and actual rent, and in a composite question they jump straight to the rent figure given in the question. Vacancy and unrealised rent adjustments are also skipped because they appear as narrative sentences rather than numbers.
What to do instead
Use a rigid vertical format: municipal value, fair rent, standard rent, expected rent, actual rent, vacancy, unrealised rent, gross annual value, municipal taxes paid by owner, net annual value, 30% deduction, interest on borrowed capital. Write the label on every line even when the amount is nil, and state the reason when actual rent is chosen over expected rent.
Applying the section 54, 54B, 54EC or 54F exemptions without checking the conditions - claiming 54F without holding the new house for the lock-in, or claiming 54EC on a gain above the 50 lakh cap, or depositing in a capital gains account scheme after the due date under section 139(1).
The computation of long-term capital gain is done correctly but the exemption is treated as automatic once the investment amount is known. The procedural conditions (time limits, lock-in, cap, investment in specified bonds within six months) are theory items that are rarely written into numerical answers.
What to do instead
After computing the gain, write a short 'conditions satisfied' checklist against each exemption claimed, with the date of transfer, date of investment, amount and section. If a condition is not satisfied, state the consequence (exemption withdrawn, taxable in the year of transfer) and show the tax effect.
Treating every receipt as exempt or every payment as deductible without testing the specific section - for example, deducting a penalty for breach of law under section 37(1) or treating a gift from a non-relative as fully exempt.
General principles ('business expenditure is deductible') dominate revision, while the negative lists in sections 37, 40, 40A and 43B and the proviso to section 56(2)(x) are learned as isolated facts and not applied in problem format.
What to do instead
Maintain a two-column disallowance register in every computation: 'claimed but disallowed' and 'not claimed but allowable'. For gifts, apply the three tests in order - relative, occasion (marriage only), and amount above 50,000 - and show the taxable portion separately.
Answering 'whether tax is deductible' questions with a yes/no and a rate, without naming the section, the threshold, the time of deduction and the consequence of failure - for example, missing that section 194Q applies only to a buyer with turnover above 10 crore in the preceding year.
TDS is revised as a list of rates. The applicability conditions (threshold, turnover of the payer, nature of payment, pan availability) are the part that changes and the part that is examined, but candidates treat them as background reading.
What to do instead
For every TDS answer use the four-part structure: section and nature of payment, threshold, rate and time of deduction, and consequence of non-deduction or late deduction (interest under 201, 30% disallowance under 40(a)(ia), and the 206AA higher rate for missing PAN). Build a table with these four columns for each of the commonly examined sections.
Filing the GST return type against the wrong taxpayer category - answering that a composition dealer files GSTR-3B, or that a regular dealer files CMP-08 - or stating a due date without the category and period it belongs to.
Return forms are memorised as a list, and the composition, QRMP and e-commerce operator variants are studied late. Candidates also carry forward pre-2020 return names that no longer exist.
What to do instead
Draw a matrix with rows for regular, composition, QRMP, non-resident, TDS deductor, e-commerce operator and input service distributor, and columns for the return, its frequency, due date and what it reports. Answer return questions by locating the taxpayer in the matrix first, then quoting the form and date.
Computing the value of supply from the invoice amount without adding or excluding the items that sections 15(2) and 15(3) require - omitting packing and freight charged separately by the supplier but including a discount that is not recorded on the invoice and is not a pre-agreed trade discount.
Candidates assume 'transaction value' equals the invoice total. The inclusions and exclusions in section 15 are short lists that look obvious in theory but are easy to misapply when the question embeds them in a paragraph.
What to do instead
Reconstruct the value line by line: start with price, add any taxes other than GST, incidental expenses and subsidies linked to price, then deduct discounts only where they are pre-agreed, linked to the invoice and known before supply. Write the section reference beside each adjustment so the examiner sees the reasoning.
Claiming input tax credit on blocked or ineligible items - motor vehicles used for employee transport, food and beverages, club membership, works contract for immovable property - or claiming it without the conditions of section 16 being met, such as non-payment to the supplier within 180 days or possession of a valid tax invoice.
The section 17(5) list is long and the exceptions to it are the examinable part. Candidates remember the headline block but not the exceptions (e.g. motor vehicles with seating capacity above 13, or goods used for making taxable supplies) and do not check the 180-day payment condition at all.
What to do instead
For each ITC item, run a three-question filter: is it blocked under 17(5) and does an exception apply, are the section 16(2) conditions met including invoice and receipt, and is there any 180-day reversal or rule 42/43 apportionment? Show the eligible and ineligible credit in two separate columns and state the reversal amount with its rule.
Placing a supply in the wrong category for place of supply or time of supply - treating an immovable-property-related service as a general service, or ignoring the notification-based time of supply for reverse charge and for supplies where invoice is not issued within the prescribed period.
Place of supply has separate sections for goods, domestic services, cross-border services and specific services, and candidates revise only the general rule. Time of supply is confused with the invoice date, and the earlier-of rule is applied without checking whether the invoice was issued in time.
What to do instead
Before answering, classify the supply on three axes: goods or services, domestic or cross-border, and general or special category (immovable property, event, transport, banking). Then write the applicable sub-section of section 10 or 12 and the corresponding time of supply provision. Practise a set of mixed supplies where the same service is tested once as domestic and once as cross-border.