Double Entry System

Double entry bookkeeping is the foundation of modern accounting. Every transaction affects at least two accounts — one is debited, the other credited. The total of debits always equals the total of credits.

The Accounting Equation: Assets = Liabilities + Owner's Equity (Capital)

• Assets (what the business owns) must always equal Liabilities + Capital

Debits (Dr) and Credits (Cr):

• Assets: Debit increases, Credit decreases
• Liabilities: Credit increases, Debit decreases
• Capital/Owner's Equity: Credit increases, Debit decreases
• Revenue/Income: Credit increases (earnings grow equity)
• Expenses: Debit increases (expenses reduce equity)

Memory tool: DEAL CLIC

• Debit increases: Drawings, Expenses, Assets, Losses
• Credit increases: Capital, Liabilities, Income, Credits

Example: Business buys equipment Rs. 50,000 cash:

• Debit Equipment (asset increases): Rs. 50,000
• Credit Cash (asset decreases): Rs. 50,000

Ledger accounts use T-format:

• Left side = Debit | Right side = Credit
• The difference (balance) is carried down at period end.

Mastery Extension: Double Entry System

This extension turns the lesson into an active study session for Principles of Accounting (AKU-ACC) on Aga Khan Board. It does not replace the current specification or a teacher's instructions. Use it after reading the main notes, and check the official syllabus linked from the subject page whenever a live rule, paper structure, or assessment detail matters.

Learning Targets

By the end of a focused revision session, you should be able to define the central idea in your own words, connect it to the lesson's supporting concepts, apply it to a new question, and explain why your method or evidence is appropriate. Use the topic description as your boundary: Debits, credits, ledger accounts and the accounting equation. If an answer wanders outside that boundary, return to the command word and remove material that does not earn a mark.

Use these lesson-specific checkpoints:

• Explain this accurately without copying: Every transaction: one debit, one credit of equal amount.
• Explain this accurately without copying: Assets = Liabilities + Owner's Equity (accounting equation).
• Explain this accurately without copying: Assets and expenses increase with Debit.
• Explain this accurately without copying: Liabilities, capital and income increase with Credit.

A Reliable Answer Method

Define the relevant term, show the calculation or chain of reasoning, apply it to the organisation or scenario, and finish with a qualified judgement. Do not award yourself analysis marks for repeating the case. State what the evidence changes, who is affected, and why the effect may depend on another condition.

Before writing, spend a few seconds planning. Circle or note the command word, identify the exact knowledge being tested, and decide what evidence, working, example, or quotation is needed. During the answer, make every line do a job. At the end, reread the question and verify that your conclusion follows from the steps you actually showed.

Apply the Pakistan Context Carefully

The lesson's local case is A Karachi Shopkeeper's Books — Double Entry in Practice. A Karachi retailer in Saddar buys stock (inventory) Rs. 30,000 on credit from a supplier. Double entry: Debit Purchases/Stock (asset increases) Rs. 30,000; Credit Creditor/Accounts Payable (liability increases) Rs. 30,000. When paid: Debit Creditor Rs. 30,000; Credit Cash/Bank Rs. 30,000. AKU-EB Accounting consistently tests journal entries using Pakistani business scenarios Use this example to make an abstract idea memorable, but do not force it into an exam response when the question supplies a different context. A good application names the relevant feature, explains the connection, and also states where the comparison stops.

Try this three-part application drill:

1. Summarise the local example in one accurate sentence.
2. Identify which key point it demonstrates and quote or calculate the evidence available in the lesson.
3. Change one condition in the scenario and explain how the result, interpretation, or decision might change.

Guided Retrieval and Practice

Build a two-column benefit-and-limitation table, calculate any available measure, and write a conclusion that names the condition that would change your decision. Work without notes first; retrieval is the test. Mark the attempt only after finishing, using the lesson and the explanation rather than memory or confidence.

1. Question lens: A business receives Rs. 10,000 cash from a debtor. Which is correct

   After answering, justify the choice using this check: Cash received → Cash (asset) increases → Debit Cash. Debtor (asset) decreases → Credit Debtor

1. Question lens: Owner's Equity increases when:

   After answering, justify the choice using this check: Revenue earned increases retained earnings → increases owner's equity. Profit = Revenue − Expenses

1. Question lens: If Assets = Rs. 500,000 and Liabilities = Rs. 200,000, Capital =

   After answering, justify the choice using this check: Assets = Liabilities + Capital → Capital = Assets − Liabilities = 500,000 − 200,000 = Rs. 300,000

For every missed question, keep an error log with four fields: what I chose, why it was tempting, the rule or evidence I missed, and the cue I will notice next time. This turns a wrong answer into a reusable revision asset instead of a score you immediately forget.

Seven-Day Revision Loop

• Day 1 — Understand: read the lesson and reduce each section to one sentence.
• Day 2 — Recall: reproduce the key points with the page closed.
• Day 3 — Apply: complete the local-context drill and one unfamiliar example.
• Day 4 — Practise: answer the inline quiz, showing or saying your reasoning before selecting an option.
• Day 5 — Repair: revisit only the weak steps recorded in your error log.
• Day 6 — Mix: combine this topic with an earlier topic from the same subject so that you must choose the correct method.
• Day 7 — Check: complete a timed response, self-mark conservatively, and plan the next review date.

You are ready to move on when you can explain the topic without the notes, answer the lesson-specific checks with reasons, apply the idea to a fresh context, and identify one common mistake before making it. If one of those checks fails, repeat the relevant stage rather than rereading everything.