CTA Finance & Accounting common mistakes
CTA Finance & Accounting · Understand the traps and how to avoid them.
When a statement of cash flows is tested, candidates classify interest paid, dividends paid and dividends received using the entity's own business practice rather than the classification permitted by the reporting framework, then cannot reconcile the operating section to profit.
Textbook examples usually show one classification only, so candidates memorise a single treatment and do not check the policy note or the framework's options. Under pressure they default to 'interest is always operating' and mis-total the reconciliation.
What to do instead
Before answering, write the classification policy implied by the question stem (interest paid: operating or financing; dividends paid: financing or operating; interest and dividends received: investing or operating). Build the operating section from profit using only that policy, and cross-check that the three sections plus opening cash equal closing cash.
Candidates compute depreciation, impairment or a provision using the figure given in the scenario without first checking the asset's carrying amount after prior revaluation, disposal or government grant, so the charge is arithmetically correct but based on the wrong base.
Exam scenarios deliberately include redundant numbers (original cost, tax base, fair value at an earlier date) and candidates grab the most prominent one. Time pressure discourages rebuilding the carrying-amount working.
What to do instead
Always write a three-line carrying-amount roll-forward: opening carrying amount, additions/disposals/revaluation, closing carrying amount before the charge. Compute the charge from the closing base, and state in one sentence why each discarded figure was irrelevant.
In process costing with normal loss and scrap value, candidates value the abnormal loss or gain at full cost including the scrap proceeds, or omit the scrap value of normal loss from the cost per equivalent unit calculation.
The mechanics of equivalent units are learned separately from loss accounting, so candidates apply the equivalent-unit formula to total input and forget that normal loss bears no cost and that scrap proceeds reduce the process cost.
What to do instead
Use the sequence: input units less normal loss equals expected good output; cost per equivalent unit equals (process cost less scrap value of normal loss) divided by expected good equivalent units; abnormal loss is valued at that unit cost and abnormal gain is credited at the same rate. Reconcile the total cost of good output plus abnormal loss to total input cost.
Candidates treat a fixed overhead volume variance as a cost control signal and investigate it, or absorb fixed overhead using actual hours when the question asks for a standard marginal or absorption profit statement.
Variance analysis is taught with variable costs where every variance signals efficiency; the volume variance's nature as a capacity/absorption artefact is easily forgotten, and the absorption basis (hours worked vs. standard hours for actual output) is not stated explicitly.
What to do instead
Classify each variance before commenting: price/rate and efficiency/usage variances are controllable; the fixed overhead volume variance arises from actual output differing from budget and is reconciled through over/under-absorption. In absorption costing, absorb fixed overhead on standard hours for actual output and show the resulting over- or under-absorbed balance explicitly.
When asked to choose between projects or to advise on a make-or-buy decision, candidates discount cash flows that are sunk or committed, or omit the tax allowable depreciation tax shield and the working capital recovery at the end of the project.
Relevant costing rules are learned in management accounting and discounted cash flow in financial management, and candidates do not combine them. The tax shield is easy to forget because it is not a cash outflow in the year of purchase.
What to do instead
List every cash flow and tag it relevant or not: sunk cost (no), allocated fixed overhead (no unless incremental), opportunity cost of released space (yes), tax allowable depreciation shield (yes, timing per the tax rules given), working capital injection and recovery (yes). Discount only the tagged-relevant flows at the given cost of capital, and state the treatment of each excluded item.
Candidates compute the weighted average cost of capital using book value weights and the coupon rate on debt, then use that rate to appraise a project with a different risk profile without adjusting for risk.
Market values and the yield to maturity require extra steps, so book values and coupon rates are used as shortcuts. The distinction between the company's overall WACC and a project-specific rate is often skipped in revision.
What to do instead
Use market values of equity and debt as weights, use the yield to maturity (or after-tax cost of debt given) rather than the coupon, and adjust for tax on debt interest. If the project's risk differs from the existing portfolio, state that a risk-adjusted rate is required and explain the direction of the adjustment rather than applying the firm-wide WACC.
In a corporate tax computation, candidates apply the accounting depreciation charge instead of the tax allowable depreciation, and they omit the restriction on deductible interest or the add-back of non-deductible expenses and disallowed provisions.
Financial statements are prepared first in most study material, so accounting figures stay in working memory. Tax adjustments are a separate discipline and candidates do not maintain a tax reconciliation schedule.
What to do instead
Build a tax computation from accounting profit with an explicit adjustment column: add back accounting depreciation, deduct tax allowances, add back non-deductible expenses and movements in disallowed provisions, apply the interest restriction and any loss relief rules given. Show taxable profit before applying the rate, and reconcile the effective tax rate to the statutory rate.
Candidates answer indirect tax and payroll questions by quoting the headline rate without checking the place-of-supply rules, the registration threshold, or the treatment of zero-rated and exempt supplies, and they mix up input tax recovery on exempt activities.
Rate recall is easy and feels like the whole answer, while place-of-supply and partial exemption rules are detailed and often skimmed. The distinction between zero-rated and exempt supplies matters only for input tax recovery, which candidates overlook.
What to do instead
For every indirect tax question, state three things before computing: where the supply is treated as made, whether the supplier is registered or required to register, and the liability category of each supply. Then state the input tax recovery rule for each category, remembering that exempt supplies generally block recovery and zero-rated supplies do not. Reconcile the net tax payable line by line.
When evaluating internal controls, candidates list control activities generically (segregation of duties, authorisation, reconciliation) without linking each to the specific risk in the scenario, and they classify a detected weakness as a design deficiency when it is an operating deficiency, or vice versa.
Control frameworks are memorised as lists, and candidates reproduce the list rather than testing it against the described process. The design-versus-operating distinction requires reading whether the control existed but was not performed or never existed at all.
What to do instead
For each scenario process, write the risk first, then the control that addresses it, then whether the scenario says the control was absent (design deficiency) or present but not followed (operating deficiency). Only then recommend a remedy, and make the remedy specific to the process step, naming who performs it and what evidence is retained.
Candidates answer ethics questions by identifying the threat (self-interest, self-review, advocacy, familiarity, intimidation) but then recommend disclosure to the client as the safeguard, or conclude that disclosure alone resolves a prohibited situation.
Confidentiality and transparency are over-generalised into 'tell the client', and candidates do not distinguish safeguards that eliminate or reduce a threat from those that merely inform. Prohibitions in independence rules are absolute and cannot be safeguarded away.
What to do instead
For each threat, state the specific threat category and the party affected, then test whether the situation is prohibited outright (in which case the only answer is to decline or withdraw) or merely significant. If significant, apply a safeguard that changes the circumstances (removing the individual, independent review, separate team) and only then consider disclosure. Close with the escalation route if the client refuses.