📚 AS OCR Accounting: Case Study Practical Exercise | AS OCR 会计：案例分析实战演练
Case studies offer one of the most effective ways to master AS Level Accounting. By working through a complete scenario from source documents to financial statements, you can connect theory to real business decisions and develop the analytical skills needed for the exam. This practical exercise follows a sole trader through one accounting period, covering journal entries, ledger accounts, trial balance, adjustments, final statements and ratio analysis.
案例分析是掌握 AS 会计的最有效方式之一。通过从原始凭证到财务报表的完整情景演练，你能够将理论联系实际商业决策，并培养考试所需的分析能力。本实战练习将跟随一个独资经营者完成一个会计周期，涵盖日记账分录、分类账、试算平衡表、调整、最终报表及比率分析。
1. Case Background | 案例背景
John runs a small retail shop selling home accessories. He started the month of December 2023 with the following balances: cash £5,000, inventory £3,000, equipment £10,000, trade payables £2,000 and capital £16,000. The business uses the periodic inventory system and prepares accounts monthly. During December, the transactions below took place. All figures are in GBP.
John 经营一家销售家居用品的小型零售店。2023 年 12 月初，他拥有以下余额：现金 £5,000，存货 £3,000，设备 £10,000，应付账款 £2,000，资本 £16,000。该企业采用定期盘存制并按月编制报表。12 月发生了以下交易。所有金额单位均为英镑。
- 1 Dec: Purchased inventory on credit from D&CO, £2,000.
- 5 Dec: Cash sales of £3,500 (cost of goods sold £1,800).
- 10 Dec: Sold goods on credit to A Limited for £2,200 (cost £1,100).
- 15 Dec: Paid wages £800 by cheque.
- 20 Dec: Received £1,500 from A Limited on account.
- 25 Dec: Paid rent £600 by bank transfer.
12 月 1 日：向 D&CO 赊购存货 £2,000。5 日：现金销售 £3,500（销货成本 £1,800）。10 日：赊销给 A Limited，金额 £2,200（成本 £1,100）。15 日：以支票支付工资 £800。20 日：收到 A Limited 还款 £1,500。25 日：银行转账支付租金 £600。
2. Recording Transactions in the Journal | 日记账记录交易
Journal entries are the first step in the accounting cycle. Every transaction must be recorded with a debit and a credit of equal value. For example, the purchase on 1 Dec is recorded as:
日记账分录是会计循环的第一步。每一笔交易都必须以等额的借方和贷方记录。例如，12 月 1 日的采购分录为：
| Date | Details | Dr (£) | Cr (£) |
|---|---|---|---|
| 1 Dec | Purchases | 2,000 | |
| Trade Payables (D&CO) | 2,000 |
Debit Purchases because inventory increases (periodic system), and credit Trade Payables because the business now owes the supplier. All other transactions are journalised similarly, with cash/bank, sales, cost of sales, wages, rent and receivables entries. At this stage, every journal is posted to the general ledger.
借记采购账户是因为存货增加（定期盘存制），贷记应付账款是因为企业现在欠供应商款项。其他交易类似地记入日记账，包括现金/银行存款、销售收入、销货成本、工资、租金和应收账款等分录。在这个阶段，每笔日记账都会过账到总分类账。
3. Posting to the Ledger | 过账到分类账
After journalising, each entry is transferred to the relevant T‑accounts in the general ledger. For instance, the Cash account receives debits from opening balance (£5,000) and cash sales (£3,500), and credits from wages (£800) and rent (£600). The T‑account for Cash at 31 December would appear as:
日记账录入后，每笔分录都被转移到总分类账中相应的 T 型账户。例如，现金账户的借方包括期初余额 £5,000 和现金销售 £3,500，贷方包括工资 £800 和租金 £600。截至 12 月 31 日的现金 T 型账户如下：
| Cash Account | |||
|---|---|---|---|
| 1 Dec Balance b/d | 5,000 | 15 Dec Wages | 800 |
| 5 Dec Sales | 3,500 | 25 Dec Rent | 600 |
| 20 Dec A Limited | 1,500 | ||
| 10,000 | 31 Dec Balance c/d | 8,600 | |
Similar ledgers are maintained for Sales, Purchases, Trade Payables, Trade Receivables, Wages, Rent, Equipment and Capital. This process ensures every transaction is properly categorised before the trial balance is extracted.
销售收入、采购、应付账款、应收账款、工资、租金、设备和资本等账户也采用类似的分类账。这一过程确保在提取试算平衡表之前，每一笔交易都已被正确归类。
4. Trial Balance Preparation | 编制试算平衡表
A trial balance is drawn up at the end of the period to check the arithmetic accuracy of the ledgers. The total debit and credit columns must be equal. For John's shop, the unadjusted trial balance as at 31 December 2023 is:
期末编制试算平衡表是为了检查分类账的算术准确性。借方和贷方的合计金额必须相等。John 的店铺截至 2023 年 12 月 31 日的未调整试算平衡表如下：
| Account | Dr (£) | Cr (£) |
|---|---|---|
| Cash | 8,600 | |
| Trade Receivables (A Limited) | 700 | |
| Inventory (opening) | 3,000 | |
| Equipment | 10,000 | |
| Purchases | 2,000 | |
| Wages | 800 | |
| Rent | 600 | |
| Sales | 5,700 | |
| Trade Payables | 4,000 | |
| Capital | 16,000 | |
| Totals | 25,700 | 25,700 |
The trial balance totals agree, confirming there are no arithmetic errors in the ledgers. However, several items still need to be adjusted for accruals, depreciation and closing inventory.
试算平衡表总额一致，确认分类账中没有算术错误。不过，仍需对应计项目、折旧和期末存货等项目进行调整。
5. Adjusting Entries | 调整分录
At the period end, adjusting entries are made to align the accounts with the accruals concept. John's business requires three key adjustments:
期末需要编制调整分录，以使账户符合权责发生制原则。John 的企业需要进行三项关键调整：
(1) Closing inventory adjustment. A physical count reveals inventory on hand at 31 December is £2,100. Under the periodic system, cost of goods sold is calculated as:
Opening inventory (£3,000) + Purchases (£2,000) – Closing inventory (£2,100) = £2,900.
The journal entry debits Cost of Sales £2,900 and credits Purchases £2,000 and Inventory £900 (net), effectively transferring opening inventory and purchases to cost of sales and establishing closing inventory.
(1) 期末存货调整。经实地盘点，12 月 31 日库存为 £2,100。在定期盘存制下，销货成本计算为：期初存货 £3,000 + 购货 £2,000 – 期末存货 £2,100 = £2,900。日记账分录借记销货成本 £2,900，贷记购货 £2,000 和存货 £900（净额），实际是将期初存货和购货转入销货成本并确立期末存货。
(2) Depreciation of equipment. The equipment cost £10,000 with an estimated residual value of £1,000 and a useful life of five years. Using the straight‑line method, monthly depreciation is (£10,000 – £1,000) / (5 × 12) = £150. The adjusting entry debits Depreciation Expense £150 and credits Accumulated Depreciation £150.
(2) 设备折旧。设备原值 £10,000，预计残值 £1,000，使用年限 5 年。采用直线法，月折旧额为 (£10,000 – £1,000) / (5 × 12) = £150。调整分录借记折旧费用 £150，贷记累计折旧 £150。
(3) Provision for doubtful debts. At the period end, trade receivables amount to £700. John estimates that 5% may prove uncollectible, so a provision of £35 is needed. The entry is: debit Bad Debts Expense £35, credit Provision for Doubtful Debts £35.
(3) 坏账准备。期末应收账款余额为 £700。John 估计 5% 可能无法收回，因此需要计提坏账准备 £35。分录为：借记坏账费用 £35，贷记坏账准备 £35。
6. Depreciation and Bad Debts in Depth | 折旧与坏账详解
Depreciation spreads the cost of a non‑current asset over its useful life. In this case, the straight‑ thod charges an equal amount each month. The net book value of equipment at 31 December is £10,000 – £150 = £ nt of financial position. The depreciation expense reduces profit in the income statement.
折旧将非流动资产的成本在其使用寿命内分摊。本例采用直线法，每月计提等额折旧。截至 12 月 31 日，设备的账面净值为 £10,000 – £150 = £9,850。该价值将列示在财务状况表中。折旧费用会减少损益表中的利润。
provision for doubtful debts ensure that receivables are not overstated. The direct write‑ he trade receivables balance is shown net of the provision, so the net realisable value is £700 – £35 = £665.
坏账及坏账准备确保了应收账款不会高估。AS OCR 不使用直接冲销法，而是通过计提准备将预计损失与当期收入相配比。应收账款按扣除准备后的净额列示，因此可变现净值为 £700 – £35 = £665。
7. Adjusted Trial Balance | 调整后试算平衡表
After incorporating adjustments, an adjusted trial balance is prepared to confirm that debits still equal credits before drafting the financial statements. Key changes include the appearance of Cost of Sales £2,900, Depreciation Expense £150, Bad Debts Expense £35, Accumulated Depreciation £150, Provision for Doubtful Debts £35 and Closing Inventory £2,100. The adjusted totals increase slightly, and the trial balance remains balanced.
纳入调整后，需要编制调整后试算平衡表，以在草拟财务报表前确认借方仍等于贷方。主要变化包括销货成本 £2,900、折旧费用 £150、坏账费用 £35、累计折旧 £150、坏账准备 £35 以及期末存货 £2,100 的出现。调整后合计金额略有增加，但试算平衡表依然平衡。
8. Income Statement Preparation | 损益表编制
for the month ended 31 December 2023 is built from the adjusted trial balance. Revenue is £5,700, cost of sales £2,900, giving a gross profit of £2,800. Operating expenses are wages £800, rent £600, depreciation £150 and bad debts £35, totalling £1,585. Therefore, net profit for the period is £2,800 – £1,585 = £1,215.
截至 2023 年 12 月 31 日的月度损益表根据调整后试算平衡表编制。收入 £5,700，销货成本 £2,900，毛利 £2,800。营业费用包括工资 £800、租金 £600、折旧 £150 和坏账 £35，合计 £1,585。因此，本期净利润为 £2,800 – £1,585 = £1,215。
Gross Profit Margin = (Gross Profit / Sales) × 100% = (2,800 / 5,700) × 100% ≈ 49.1%
Net Profit Margin = (Net Profit / Sales) × 100% = (1,215 / 5,700) × 100% ≈ 21.3%
The income statement clearly shows the business is profitable, with a healthy gross margin and a net margin above 20%. However, the owner must consider whether operating costs can be controlled further to improve net profit.
损益表清晰显示企业是盈利的，毛利率健康，净利润率超过 20%。但企业主需要考虑是否可以进一步控制营业成本，以提升净利润。
9. Statement of Financial Position | 财务状况表
The statement of financial position as at 31 December 2023 presents the business’s assets, liabilities and equity:
截至 2023 年 12 月 31 日的财务状况表列示了企业的资产、负债和权益：
| Assets (£) | Liabilities & Capital (£) | ||
|---|---|---|---|
| Non‑current assets: | Trade payables | 4,000 | |
| Equipment (net) | 9,850 | ||
| Current assets: | Capital: | ||
| Inventory | 2,100 | Balance at 1 Dec | 16,000 |
| Trade receivables (net) | 665 | Net profit | 1,215 |
| Cash | 8,600 | Balance at 31 Dec | 17,215 |
| Total assets | 21,215 | Total liabilities & capital | 21,215 |
The balance sheet demonstrates that the business is financed mainly by capital, with a relatively low level of gearing, as there are no long‑term loans. The liquidity position appears strong, with cash representing the largest current asset.
资产负债表显示，企业主要由自有资本融资，由于没有长期借款，负债水平较低。流动性状况似乎很强，现金是最大的流动资产。
10. Ratio Analysis | 比率分析
Ratio analysis transforms the absolute figures into meaningful indicators for decision‑making. The following ratios are particularly relevant for John’s business:
比率分析将绝对数字转化为对决策有意义的信息。以下比率对 John 的企业尤为重要：
- Gross profit margin: 49.1% — indicates strong mark‑up on cost and effective pricing.
- Net profit margin: 21.3% — after operating costs, the business still retains a significant share of revenue as profit.
- atio: Current assets (2,100 + 665 + 8,600 = 11,365) / current liabilities (4,000) = 2.84:1 — well above the safe level of 2:1, implying ample short‑term solvency.
- Quick ratio (acid test): (Current assets – inventory) / current liabilities = (665 + 8,600) / 4,000 = 2.32:1 — even without slow‑moving inventory, obligations can be met comfortably.
- Return on capital employed (ROCE): Net profit / Capital at end = 1,215 / 17,215 = 7.1% per month — annualised this suggests a strong return if sustained.
毛利率 49.1% — 表明成本加成率较高，定价有效。净利率 21.3% — 扣除营业成本后，企业仍将相当一部分收入保留为利润。流动比率：流动资产 (2,100 + 665 + 8,600 = 11,365) / 流动负债 (4,000) = 2.84:1，远高于 2:1 的安全水平，意味着短期偿债能力充足。速动比率：(流动资产 – 存货) / 流动负债 = (665 + 8,600) / 4,000 = 2.32:1 — 即使不考虑变现较慢的存货，也能轻松偿还债务。资本回报率 (ROCE)：净利润 / 期末资本 = 1,215 / 17,215 = 每月 7.1% — 如果持续下去，年化回报率非常可观。
11. Interpretation and Decision‑Making | 解读与决策
Based on the ratios, John’s business is in a strong financial position. The high current and quick ratios suggest he can easily pay his suppliers on time and may consider negotiating early payment discounts. The gross profit margin of 49.1% reflects a successful pricing strategy, but if competitors offer similar products at lower prices, he may need to monitor sales volumes. The net profit margin could be improved by controlling rent and wages, perhaps by renegotiating the lease or adjusting staffing levels during quiet periods.
基于这些比率，John 的企业财务状况稳健。高流动比率和速动比率表明他能够轻松按时支付供应商货款，并可考虑争取提前付款折扣。49.1% 的毛利率反映了成功的定价策略，但如果竞争对手以更低价格提供类似产品，他可能需要关注销售数量。净利润率可以通过控制租金和工资来改善，例如重新协商租约或在淡季调整人员配置。
The absence of long‑term debt means the business has low financial risk. However, if John plans to expand, he could consider taking on a loan, as the business’s cash generation appears strong enough to service the debt. Ultimately, the financial statements serve as a foundation for planning future growth and safeguarding the business’s stability.
没有长期借款意味着企业的财务风险较低。然而，如果 John 计划扩张，他可以考虑举债，因为企业的现金流似乎足够偿还债务。最终，财务报表为规划未来增长和维护企业稳定奠定了基础。
12. Conclusion | 总结
This case study has walked through an entire accounting cycle for a sole trader, from journalising transactions to preparing final statements and conducting ratio analysis. The process highlights how each stage builds on the previous one and why accuracy is paramount. For AS OCR candidates, practising with full case studies sharpens the ability to identify adjustments, correct errors and interpret financial data — skills that are essential for success in both the exam and real‑world accounting.
本案例演练了独资经营者的完整会计周期，从日记账分录到编制最终报表并进行比率分析。整个过程凸显了每一阶段如何以前一阶段为基础，以及为何准确性至关重要。对于 AS OCR 考生而言，通过完整案例进行练习，可以提升识别调整、更正错误和解读财务数据的能力——这些技能对考试和真实会计工作都极为关键。
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