Think of financial accounting principles as the grammar of bookkeeping. Just as English sentences follow grammar rules so that every reader understands them the same way, accounting follows a set of principles so that a balance sheet prepared in Chennai means the same thing to a banker in Delhi as it does to an auditor in London.
These principles are collectively called GAAP — Generally Accepted Accounting Principles. In India, the framework is anchored in standards issued by the Institute of Chartered Accountants of India (ICAI) and, increasingly, Indian Accounting Standards (Ind AS) aligned with IFRS. For SSC CGL purposes, you need the classical layer: the fundamental concepts and conventions that underpin everything else.
Here is a useful analogy. Imagine you are a cricket scorer. You do not decide on a whim whether to count a wide as one run or two — you follow the Laws of Cricket. Similarly, an accountant does not decide how to record a transaction based on personal preference. The accounting principles are those laws.
There are two broad categories:
The distinction matters because SSC CGL questions sometimes ask you to classify a principle into the correct category — and mixing them up is a trap.
The single most important structural fact in all of accounting is the Accounting Equation: Assets = Liabilities + Owner's Equity. Everything — every journal entry, every ledger, every balance sheet — is just this equation being maintained in different forms.
1. Business Entity Concept
The business is treated as a person separate from its owner. If the proprietor withdraws cash for personal use, that is recorded as a "drawing" — a reduction in capital — not as a business expense. The business's books track only the business's transactions, never the owner's personal affairs.
This is the first filter you apply when a question describes a mixed transaction involving the owner.
2. Going Concern Concept
The business is assumed to continue operating for the foreseeable future. This is why assets are recorded at historical cost and depreciated gradually — not written down to immediate liquidation value. If this assumption did not exist, you would have to revalue every asset to its fire-sale price every year.
SSC CGL tests this by presenting a scenario where a company is about to shut down and asking which principle is violated when it continues to record assets at book value.
3. Money Measurement Concept
Only transactions that can be expressed in monetary terms are recorded. The efficiency of the management team, employee morale, brand loyalty — none of these appear in the books, not because they are unimportant, but because they cannot be measured in rupees with any objectivity.
4. Dual Aspect Concept (Double Entry)
Every transaction has two equal and opposite effects. You debit one account and credit another. The total of all debits always equals the total of all credits. This is what keeps the accounting equation intact.
Assets = Liabilities + Owner's Equity
If assets increase by ₹10,000 (say, you buy machinery for cash), then either a liability increases or owner's equity increases — or another asset decreases (cash goes down by ₹10,000). The equation never breaks.
5. Accrual Concept
Revenue is recorded when it is earned, not when cash is received. Expenses are recorded when they are incurred, not when cash is paid. This is the accrual basis of accounting, as opposed to the cash basis.
Under accrual, if you sell goods in March but receive payment in April, the revenue goes into March's books. This gives a more accurate picture of performance.
6. Matching Concept
An extension of accrual: expenses must be matched to the revenues they helped generate, in the same accounting period. Cost of goods sold is matched with sales. Salaries of the sales team are matched with the sales period they worked. Depreciation on a machine is spread across the years the machine generates revenue.
Look — the Matching Principle is the most frequently tested principle in SSC CGL accounting questions. Know its definition cold.
Consistency Convention
Once you choose an accounting method (say, WDV depreciation), you apply it consistently across periods. You cannot switch to SLM one year just because it gives a better profit figure. If you do switch, you must disclose the change and its financial impact.
Conservatism (Prudence) Convention
Anticipate no profits, but provide for all probable losses. If inventory might fall in value, you write it down immediately. But if you expect to make a profit next quarter, you do not record it until it is earned. "Play it safe" is the accountant's default.
Materiality Convention
Trivial amounts need not be treated with full rigour. A ₹10 pen bought for the office can be expensed immediately rather than capitalised and depreciated over three years. What counts as material depends on the size and context of the business.
Full Disclosure Convention
All material information that would influence the decision of a reader must be disclosed. This is the basis for notes to accounts, contingent liabilities disclosures, and related-party transaction disclosures.
Depreciation is how the cost of a fixed asset is spread over its useful life — an application of the Matching Principle.
Straight-Line Method (SLM):
Annual Depreciation = (Cost − Salvage Value) ÷ Useful Life
The depreciation charge is equal every year. Simple, predictable.
Written Down Value Method (WDV):
Depreciation = Book Value at Start of Year × Rate%
The charge is highest in early years and falls each year. The book value never technically reaches zero (it asymptotically approaches the salvage value, or in practice a small residual remains).
The most common SSC CGL trap with SLM: candidates forget to subtract salvage value before dividing. The formula is (Cost − Salvage), not just Cost.
The six core accounting concepts: Business Entity, Accrual, Money Measurement, Going Concern, Accounting Period, Dual Aspect — recall as "BAM-GAD". When a question asks you to identify a concept from a scenario, run through this list in order. Standard approach (reading all options and second-guessing): 40s. BAM-GAD scan: 10s — you hit the right concept within 3 steps almost every time because SSC CGL tests only these six.
The trap is built into the option set: one option is always Cost ÷ Life (forgetting salvage), and another is the correct (Cost − Salvage) ÷ Life. Before you divide anything, physically write Cost − Salvage = on your rough sheet. This single habit eliminates the wrong option mechanically. In a 5-number question, this reduces your solving time from 35s (checking all options) to 15s (direct calculation, no backtracking).
For WDV at 20% per annum, the multiplier after each year is 0.8 (you retain 80%). After 3 years, the book value = Cost × (0.8)³ = Cost × 0.512. For ₹5,00,000: 5,00,000 × 0.512 = ₹2,56,000. No need to calculate year by year. Standard year-by-year method: 45s. Multiplier method: 12s. For a rate of 10%, use (0.9)ⁿ; for 25%, use (0.75)ⁿ. Memorise: 0.8³ = 0.512, 0.9³ = 0.729, 0.75³ = 0.421875 ≈ 0.422.
When an SSC CGL question contains the phrase "same period" or "period in which revenue is earned/generated," the answer is always the Matching Principle — not Accrual. Accrual is about when to record (at earning, not receipt). Matching is about pairing expenses with the revenues they generate. The two are related but distinct. This word-signal eliminates 2 wrong options in under 5s, leaving you with a binary choice at worst.
SSC CGL rearranges the accounting equation in options to confuse you: "Liabilities = Assets + Equity" or "Equity = Assets − Liabilities". The canonical form is always Assets = Liabilities + Owner's Equity. Anything with assets on the right side is structurally wrong — eliminate immediately. This knocks out 2-3 options in under 3s, leaving only the correctly structured forms to compare.
When you see an accounting-principles question in the exam hall, run this decision tree:
Is it a definition question? (Which principle states X?) → Use the BAM-GAD list. Key phrases: "separate from owners" = Business Entity; "same period as revenue" = Matching; "foreseeable future" = Going Concern; "earned not received" = Accrual; "same method year to year" = Consistency; "probable losses immediately" = Conservatism.
Is it a classification question? (Concept or Convention?) → The six BAM-GAD items are concepts. Consistency, Conservatism, Materiality, Full Disclosure are conventions.
Is it a calculation question (depreciation)? → Identify SLM or WDV. SLM: subtract salvage first, then divide. WDV: use the (1 − rate)ⁿ multiplier shortcut for multi-year questions.
Is it an accounting equation question? → Assets is always on the left. Eliminate any option that puts assets on the right side. Among remaining options, the correct form is Assets = Liabilities + Owner's Equity.
Do not spend more than 60 seconds on any principle-identification question. If the scenario is long, find the one operative phrase (the signal word) and match it to the principle. The rest of the scenario is usually context dressing.
Why this question: This is the most commonly tested principle in SSC CGL Finance and Accounts — knowing the exact language of the Matching Principle stops you from confusing it with Accrual.
Solving path: The question contains "same period as the revenues they helped to generate" — this is the signal phrase for Matching Principle. Accrual is about recording when earned (not received), not about pairing expenses with revenues. Consistency is about method uniformity across periods. Going Concern is about business continuity. Eliminate the other three on definition alone. Time: under 15s.
Why this question: The accounting equation question appears in almost every sitting. SSC CGL presents rearranged forms to test whether you know the canonical structure.
Solving path: Apply the elimination shortcut immediately. Options A, B, and C all have the equation structured incorrectly (assets not isolated on the left, or wrong sign). Option D matches Assets = Liabilities + Owner's Equity — the canonical form. No calculation needed. Time: 8s.
Why this question: SLM depreciation is the most calculation-heavy principle question. The trap (forgetting salvage value) is built directly into the option set.
Solving path: Write Cost − Salvage = 5,00,000 − 50,000 = 4,50,000 first. Then divide by useful life: 4,50,000 ÷ 10 = 45,000. Option A (₹50,000) is the trap answer — it divides cost by life without subtracting salvage. Correct answer: ₹45,000. Time: 20s.
Why this question: WDV multi-year questions require compound-style calculation. The shortcut multiplier eliminates year-by-year computation entirely.
Solving path: Rate = 20%, so retention factor = 0.8. After 3 years: 5,00,000 × (0.8)³ = 5,00,000 × 0.512 = ₹2,56,000. Verify: the option ₹2,40,000 corresponds to a naive calculation without compounding; ₹3,00,000 is only one year's depreciation subtracted. The correct answer ₹2,56,000 matches the WDV formula. Time: 18s using the multiplier shortcut vs 50s year-by-year.
Why this question: Business Entity is the most frequently confused principle — candidates confuse it with Going Concern because both involve the "business" as a concept.
Solving path: The operative phrase is "treated as separate from its owners." This is the exact definition of the Business Entity Principle. Going Concern is about the business continuing in the future — not about separation from owners. Dual Aspect is about double-entry. Matching is about expenses and revenues in the same period. Eliminate all three non-matching definitions. Time: 12s.
Confusing Accrual with Matching. Accrual tells you when to record (at earning, not cash receipt). Matching tells you how to pair expenses with revenues. They work together, but the Matching Principle is specifically triggered by language about "same period" and "expenses against revenue." If the question mentions pairing or same-period logic, choose Matching — not Accrual.
Forgetting salvage value in SLM. The single most common arithmetic error in SSC CGL accounting questions. The formula is (Cost − Salvage Value) ÷ Useful Life. Always write out Cost − Salvage as your first step — do not touch the denominator until you have the numerator right.
Applying WDV rate on original cost after year one. In WDV, the rate applies to the reduced book value each year, not the original cost. After year 1, your base changes. Use the (1 − rate)ⁿ × Cost multiplier to avoid this year-by-year error.
Classifying Conservatism and Consistency as concepts rather than conventions. The four conventions (Conservatism, Consistency, Materiality, Full Disclosure) are not foundational assumptions — they are practical guidelines. SSC CGL occasionally asks you to classify, and convention vs concept is the exact axis of confusion.
Treating the accounting equation as interchangeable in form. Assets = Liabilities + Equity is the only correct canonical form. Rearrangements like Liabilities = Assets − Equity are mathematically equivalent but are designed as trap options in MCQs because they look like they could be right. The exam tests whether you know the standard form cold.
Confusing Business Entity Principle with Going Concern. Business Entity is about separation from the owner (personal vs business). Going Concern is about the business continuing into the future. Both involve the business as a unit, which is why they are commonly mixed up. Fix the distinction: Entity = who, Concern = when.