Lesson 3 of 33 · Free
Contents
- 1 The Accounting Equation
- 1.1 What is the accounting equation?
- 1.2 The three building blocks
- 1.3 A real example: starting a café
- 1.4 Where do profits fit?
- 1.5 Try it yourself
- 1.6 Lesson recap
- 1.7 Deepening the Concept
- 1.8 Indian Application & Regulatory Context
- 1.9 Worked Example (in Rupees)
- 1.10 Common Mistakes to Avoid
- 1.11 Practice Questions with Answers
- 1.12 Key Takeaways
- 1.13 Frequently Asked Questions
The Accounting Equation
Master the single equation that underpins every balance sheet ever written: Assets = Liabilities + Equity. Once it clicks, everything else follows.
What is the accounting equation?
Before you write a single journal entry, you need one idea locked in your head:
This is the foundation of double-entry bookkeeping. It says everything a business owns (its assets) was paid for either by someone the business owes (liabilities) or by money the owner put in / earned (equity). The two sides must always be equal — that’s why your balance sheet always balances.
The three building blocks
1. Assets — what the business owns
Anything that has economic value and is controlled by the business. Cash in the bank, money customers owe you (receivables), inventory sitting in your warehouse, the laptop you bought for ₹80,000, the office building you own. Assets are usually split into:
- Current assets — convertible to cash within 12 months. Cash, accounts receivable, inventory, short-term investments, prepaid expenses.
- Non-current assets — long-term. Property, plant, equipment (PP&E), intangibles (patents, goodwill), long-term investments.
2. Liabilities — what the business owes
Money the business has to pay to someone else. Bank loans, supplier bills you haven’t paid (accounts payable), GST collected from customers that you’ll remit to the government, salaries owed to staff at month-end, bonds payable.
- Current liabilities — due within 12 months.
- Non-current liabilities — due in more than 12 months (e.g., a 5-year term loan).
3. Equity — the owner’s claim on what’s left
If you sold all the assets and paid off all the debts, equity is what would be left over for the owner(s). It has three main parts:
- Capital / Common stock — what owners put in.
- Retained earnings — profits the business kept (didn’t pay out as dividends).
- Drawings / Dividends — money the owner took out (reduces equity).
A real example: starting a café
Ravi starts a café. Let’s track the equation step by step:
| Transaction | Assets (₹) | Liabilities (₹) | Equity (₹) |
|---|---|---|---|
| Ravi puts in ₹5,00,000 of his own money | +5,00,000 Cash | — | +5,00,000 Capital |
| Takes ₹3,00,000 loan from bank | +3,00,000 Cash | +3,00,000 Loan | — |
| Buys coffee machine for ₹2,00,000 cash | +2,00,000 Equipment, −2,00,000 Cash | — | — |
| Buys ₹50,000 inventory on credit | +50,000 Inventory | +50,000 AP | — |
| End-of-day totals | 8,50,000 | 3,50,000 | 5,00,000 |
Check: 8,50,000 = 3,50,000 + 5,00,000. ✓ The equation balances after every transaction.
Where do profits fit?
Profits and losses are tracked in revenues and expenses, which feed into retained earnings — a part of equity. So a slightly expanded equation looks like:
When the café sells a ₹200 coffee for cash:
- Assets ↑ by ₹200 (cash in the till)
- Revenues ↑ by ₹200 → flows into equity
When the café pays ₹15,000 rent:
- Assets ↓ by ₹15,000 (cash leaves)
- Expenses ↑ by ₹15,000 → reduces equity
Try it yourself
Priya starts a freelance design business. On Day 1: she invests ₹2,00,000 cash. On Day 2: she buys a ₹60,000 laptop on credit. On Day 3: she completes a project and collects ₹40,000 cash. On Day 4: she pays ₹15,000 for software subscriptions.
What are her total assets, liabilities, and equity at the end of Day 4?
Answer: Assets ₹2,25,000 (cash 1,65,000 + laptop 60,000) = Liabilities ₹60,000 (laptop on credit) + Equity ₹1,65,000 (capital 2,00,000 + revenue 40,000 − expense 15,000). ✓
Lesson recap
- The accounting equation is Assets = Liabilities + Equity.
- Every transaction keeps it in balance.
- Equity grows with capital and revenue, shrinks with expenses and drawings.
- If your balance sheet doesn’t balance, the equation broke — find the error.
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Deepening the Concept
The accounting equation — Assets = Liabilities + Owner’s Equity — is the single mathematical sentence on which every balance sheet ever drawn up in human history rests. It is more than an arithmetic identity; it is an assertion about ownership. Every rupee of value the firm controls (an asset) was either borrowed from someone (a liability) or contributed by owners and retained from past profits (equity). The equation can never break, because every transaction is recorded with at least one debit and one matching credit — the dual-aspect rule — which keeps the two sides forever equal. When a Delhi manufacturer buys a CNC machine on credit, assets rise by the cost and liabilities rise by the same amount; when a Coimbatore textile mill earns ₹50 lakh of profit and ploughs it back, retained earnings (an equity component) rises by ₹50 lakh and bank balance (an asset) rises by the same amount. The equation also tells you who has a residual claim on the firm: if the company were liquidated tomorrow, creditors would be paid first from the assets and only the remainder would belong to shareholders. Understanding this hierarchy is the foundation of corporate finance, ratio analysis, and even SEBI’s insider-trading framework, which fundamentally protects shareholders’ residual claim.
Indian Application & Regulatory Context
Schedule III of the Companies Act 2013 mandates the exact balance-sheet structure that arises from the accounting equation. The left-hand side (Assets) is split between Non-current Assets and Current Assets; the right-hand side (Liabilities + Equity) is split between Shareholders’ Funds, Non-current Liabilities and Current Liabilities. The classification matters because RBI uses it to set borrowing limits, GST uses it for ITC eligibility, and the Income-tax Department uses it for transfer-pricing benchmarks. For Ind AS entities, an additional column called ‘Other Equity’ captures items like the securities premium, retained earnings, OCI reserves and capital reserves — each linked to specific standards. Beginners often miss that share application money pending allotment sits below Other Equity but above Non-current Liabilities; SEBI insists on this row for IPO transparency.
Worked Example (in Rupees)
Scenario: Anil starts AK Hardware Pvt Ltd in Pune with ₹5,00,000 of his own capital, immediately takes a ₹3,00,000 bank loan, and buys ₹6,00,000 of inventory on credit from suppliers.
- Opening capital: Cash ₹5,00,000 = Equity ₹5,00,000 (1 entry).
- Bank loan: Cash rises to ₹8,00,000, Loan Liability ₹3,00,000 — equation balances at ₹8,00,000.
- Inventory purchase on credit: Inventory ₹6,00,000 added (asset), Sundry Creditors ₹6,00,000 (liability) — total assets and total claims both become ₹14,00,000.
- Verification: Assets ₹14,00,000 (Cash ₹8,00,000 + Inventory ₹6,00,000) = Liabilities ₹9,00,000 (Loan ₹3,00,000 + Creditors ₹6,00,000) + Equity ₹5,00,000.
Takeaway: Three separate transactions produced six entries, yet the equation balanced after every one — proof that double-entry self-checks every journal posting.
Common Mistakes to Avoid
- Mixing personal cash with business cash: Anil paying his electricity bill from the firm’s account breaks the entity concept and unbalances the equation until reclassified.
- Forgetting to record the credit purchase: recording inventory but not the creditor inflates equity and triggers an automatic mismatch in any tally.
- Treating GST on the purchase as inventory cost: Input GST should be recorded under Input Tax Credit (an asset), not inventory, otherwise both sides of the equation are wrong.
- Booking the bank loan interest as a liability reduction: interest is an expense (reduces equity through P&L), not a partial loan repayment.
Practice Questions with Answers
Q1. State the accounting equation in three different but equivalent forms.
Answer: 1) Assets = Liabilities + Equity. 2) Equity = Assets − Liabilities (the residual claim view). 3) Liabilities = Assets − Equity (the creditors’ coverage view). All three describe the same balance sheet from different angles.
Q2. A Mumbai e-commerce firm receives ₹2 lakh advance from a customer in March 2026 for goods to be shipped in April 2026. How does the equation behave?
Answer: Cash (asset) rises by ₹2,00,000 and Customer Advance (liability) rises by ₹2,00,000 in March. In April, when goods are shipped, the liability is extinguished and Revenue (which flows into equity through profit) rises by ₹2,00,000. The equation balances at every step.
Q3. Why does buying a fixed asset using a bank loan not change owner’s equity?
Answer: Both sides change by equal amounts: assets (machinery) rise by the cost and liabilities (term loan) rise by the same amount. Equity is unaffected because the owner has neither contributed cash nor earned profit on this transaction.
Q4. If a fire destroys uninsured stock worth ₹5,00,000, how is the equation affected?
Answer: Inventory (asset) falls by ₹5,00,000 and the same ₹5,00,000 is recorded as a Loss by Fire (expense), reducing retained earnings within equity. The equation continues to balance — assets drop, equity drops, no liability changes.
Key Takeaways
- The accounting equation expresses the law of dual aspect — every transaction has equal and opposite effects.
- Assets are what the firm owns; liabilities are external claims; equity is the owner’s residual claim.
- Schedule III of the Companies Act enforces the equation’s structure in every Indian corporate balance sheet.
- Verification by re-totalling both sides catches most posting errors before they reach the auditor.
- The equation underpins ratio analysis, RBI lending norms, and SEBI’s investor-protection framework.
Frequently Asked Questions
Does the accounting equation hold under Ind AS revaluation models?
Yes. When an asset is revalued upward under Ind AS 16, the asset rises and a ‘Revaluation Surplus’ inside Other Equity rises by the same amount, keeping the equation balanced.
How is share premium treated in the equation?
Cash (asset) rises by total subscription, while Share Capital (equity) rises by face value and Securities Premium (also equity) rises by the excess. Both sides increase equally.
Where does deferred tax sit in the equation?
Deferred Tax Liability is a non-current liability; Deferred Tax Asset is a non-current asset. Both arise from timing differences and are governed by Ind AS 12 / AS 22.
What is ‘Equity’ on the Indian balance sheet — paid-up capital or shareholders’ funds?
Under Schedule III, ‘Shareholders’ Funds’ is the umbrella: it includes Share Capital, Reserves & Surplus (or Other Equity under Ind AS), and Money received against share warrants.