Tamil Nadu HSE First Year Commerce common mistakes
Tamil Nadu HSE First Year Commerce · Understand the traps and how to avoid them.
Writing the accounting equation as Assets = Liabilities − Capital, or leaving Capital out of the equation entirely when a proprietor's drawings and fresh capital introduced appear in the same problem.
Candidates memorise the equation as a slogan without testing it against a transaction; drawings feel like a loss so they subtract it from assets instead of from capital, and fresh capital is treated as an asset inflow rather than an increase in the owner's claim.
What to do instead
Re-derive the equation from the dual aspect idea each time: every transaction hits two places. Write A = C + L at the top of the rough sheet and, for each transaction, state which side and which element changes before touching the answer. Practise five transactions mixing drawings, fresh capital, credit purchase and cash payment until the equation still balances after each one.
Classifying a payment as capital expenditure when it is revenue expenditure (or the reverse) - for example treating wages paid for installing a machine, carriage on machinery purchased, or a major extension as ordinary expense, while treating annual whitewashing or a small repair as capital.
The candidate judges by the size of the amount or by the name of the account rather than by the nature of the benefit; 'wages' and 'repairs' look like expenses, and 'building' looks like an asset, so the label on the voucher drives the answer instead of the period benefited.
What to do instead
Apply one test before classifying: does the benefit extend beyond the current accounting year and increase earning capacity? If yes, capitalise and add to the asset; if it merely maintains existing capacity, expense it. Learn the standard pairs (installation wages, carriage inward on new plant, legal fees on purchase of land versus routine repairs, renewal of whitewash) and state the test in one line as working.
Recording the same transaction twice or omitting one leg when a compound entry, a trade discount and a cash discount all appear together, so the journal entry debits the gross amount but credits only the net, or the discount is posted to the wrong account.
The candidate processes the invoice line by line instead of drafting the full entry first; trade discount is deducted in the invoice itself and never appears in the books, but candidates either record it or confuse it with cash discount, which is a real account (Discount Allowed/Received).
What to do instead
Before writing any entry, compute the invoice value net of trade discount, then add the cash discount separately only if payment is prompt. Write the narration immediately under each entry - it forces the candidate to name both accounts and the reason. Drill ten entries that combine trade discount, cash discount, carriage and GST-style taxes so the sequence becomes automatic.
Balancing a ledger account on the wrong side, or carrying the closing balance into the trial balance on the wrong column, so a credit balance in the supplier's account is shown as a debit in the trial balance.
Candidates learn 'balance c/d' as a ritual without deciding which side is smaller; they then copy the figure mechanically. The rule that the smaller side receives the balance c/d, and that the balance b/d returns to the opposite side, is not internalised.
What to do instead
Total both sides, write the larger total on both sides, and put the difference on the side with the smaller total as 'Balance c/d'. Then ask: is this a debit or credit balance by nature (asset/expense = debit, liability/capital/income = credit)? Post the same figure to the matching trial balance column and tick it off. Do five accounts with opening balances on both sides to fix the b/d direction.
Preparing a bank reconciliation statement starting from the cash book balance but adding and subtracting items in the wrong direction - for example adding cheques deposited but not yet credited, or deducting bank charges when starting from the pass book balance.
The candidate uses one memorised list of adjustments regardless of the starting point. The signs flip when the starting point changes from cash book to pass book, and unpresented cheques and uncredited deposits are mirror images that are easily swapped.
What to do instead
Fix the starting point in writing first, then reason in terms of who has already recorded the item. If starting from the cash book, anything the bank has done but the firm has not yet recorded (charges, interest, direct collections) must be adjusted; if starting from the pass book, reverse every sign. Draw a two-column working sheet with 'effect when starting from cash book' and 'effect when starting from pass book' and fill it before computing.
Treating the sales book or purchases book as including cash transactions, or entering credit sales of assets and returns inwards in the sales book, which then distorts the trial balance and the trading account.
The subsidiary books are taught as 'books of original entry' without the qualifying rule that the sales book records only credit sales of goods dealt in. Candidates also forget that sales returns go to a separate returns inward book, not to the sales book as a negative entry.
What to do instead
State the scope of each book in one line at the top of the answer: sales book = credit sales of goods only; purchases book = credit purchases of goods only; cash and asset sales go to the journal proper. Sort each transaction in the question into a book before writing anything, and cross out cash and asset items explicitly.
Building the trading and profit and loss account without adjusting for closing stock, outstanding expenses, prepaid expenses, depreciation and bad debts, or placing closing stock on the debit side of the profit and loss account instead of the credit side of the trading account.
Candidates treat adjustments as optional extras rather than as part of the double entry. Each adjustment has two effects, and candidates record only the one visible in the trial balance, so the balance sheet and the profit figure are both wrong.
What to do instead
For every adjustment write two lines: the account to be adjusted in the trading/P&L account and the corresponding asset or liability in the balance sheet. Memorise the standard pairs (closing stock: credit trading account, debit balance sheet; outstanding wages: debit wages, credit liability; depreciation: debit P&L, credit asset). Prepare a two-column adjustments working sheet before starting the final accounts.
Confusing the balance sheet with the profit and loss account, or omitting the opening capital figure and drawings from the balance sheet so that it does not tally, then forcing a plug figure to make it balance.
The candidate has not grasped that the balance sheet is a statement of position at a date, not an account of performance over a period. When it fails to tally, the temptation is to insert a balancing figure rather than trace the error, which hides the real mistake.
What to do instead
Compute closing capital as opening capital plus net profit less drawings before writing the balance sheet, and show it as a single line. If the two sides differ, do not plug: check the adjustments sheet line by line, confirm every adjustment produced two entries, and verify that net profit in the capital calculation matches the P&L figure.
Defining a partnership or a joint stock company by listing features without distinguishing the legal consequences - for example claiming that a partnership has a separate legal entity, or that the liability of shareholders in a public limited company is unlimited.
Definitions are memorised as bullet lists from a guide, so the candidate reproduces features without linking them to the legal status of the entity, and the distinction between sole proprietorship, partnership and company collapses.
What to do instead
Learn each form of organisation through four fixed lenses: legal status, liability of owners, continuity of existence, and control/management. For each form, write one sentence per lens. Then test any statement against those lenses - 'separate legal entity', 'limited liability', 'perpetual succession' - and check which forms satisfy it.
Describing the business environment or entrepreneurship in vague generalities - 'environment is important for business' or 'an entrepreneur takes risks' - without naming components, giving an Indian example, or linking to a specific government policy or scheme.
The candidate treats these units as descriptive and revises by reading rather than by producing structured answers, so the answer lacks the classification (internal versus external environment; economic, social, political, legal, technological) and any concrete instance.
What to do instead
Prepare a one-page skeleton for each: for business environment, list internal versus external components with one Indian example each (for example liberalisation, GST, digital payment policy); for entrepreneurship, list traits, functions, and at least two named support institutions or schemes. In the exam, open with the definition, then the classified list, then one applied example, so the answer is specific rather than generic.