📚 A-Level CCEA Accounting: Formula & Key Concepts Quick Reference | A-Level CCEA 会计：公式与关键概念速查手册
This quick reference guide brings together the essential formulas, ratios, and key concepts required for the CCEA A-Level Accounting specification. Whether you are preparing for AS or A2 assessments, this handbook will help you quickly recall the core calculations in financial accounting, management accounting, and investment appraisal. Every formula is presented with a clear definition, and each section builds confidence for tackling both computational and analysis questions.
本速查手册汇集了 CCEA A-Level 会计大纲所需的核心公式、比率和关键概念。无论你正在备考 AS 还是 A2，本手册都能帮助你快速回顾财务会计、管理会计和投资评估中的主要计算。每个公式都配有清晰的定义，每一节都为你应对计算题与分析题提供有力的支持。
1. The Accounting Equation | 会计等式
The accounting equation is the foundation of double-entry bookkeeping. It must always balance.
会计等式是复式记账的基础，必须始终保持平衡。
Assets = Capital + Liabilities
Assets are resources controlled by a business. Capital represents the owner’s stake. Liabilities are obligations to third parties.
资产是企业控制的资源。资本代表所有者的权益。负债是对第三方的义务。
This can be rearranged to show net assets: Capital = Assets – Liabilities.
该等式可变形为净资产形式：资本 = 资产 – 负债。
2. Break-Even Analysis | 盈亏平衡分析
Break-even analysis helps determine the level of sales needed to cover total costs. It is vital for decision-making and planning.
盈亏平衡分析有助于确定覆盖总成本所需的销售水平，对于决策和规划至关重要。
Break-Even Point (units) = Fixed Costs ÷ (Selling Price per Unit – Variable Cost per Unit)
Contribution per unit equals selling price less variable cost per unit. The break-even point in sales revenue is found by multiplying break-even units by the selling price.
单位边际贡献等于销售单价减单位变动成本。用盈亏平衡销量乘以销售单价，即可得到盈亏平衡销售额。
Break-Even Point (£) = Fixed Costs ÷ (Contribution per Unit ÷ Selling Price per Unit)
Or equivalently: Break-Even Point (£) = Fixed Costs ÷ Contribution to Sales (C/S) Ratio.
也可表示为：盈亏平衡销售额 = 固定成本 ÷ 边际贡献率。
The margin of safety indicates how much sales can fall before a loss occurs: Margin of Safety = Actual Sales – Break-Even Sales.
安全边际表示在出现亏损前销售额可以下降的幅度：安全边际 = 实际销售额 – 盈亏平衡销售额。
3. Liquidity Ratios | 流动性比率
Liquidity ratios measure a business’s ability to meet short-term obligations. The two key ratios are the current ratio and the acid test ratio.
流动性比率衡量企业偿还短期债务的能力。两个关键比率是流动比率和速动比率（酸性测试比率）。
Current Ratio = Current Assets ÷ Current Liabilities
A ratio between 1.5:1 and 2:1 is often considered healthy, though this varies by industry.
通常认为 1.5:1 至 2:1 的比率较为健康，但会因行业而异。
Acid Test Ratio = (Current Assets – Inventories) ÷ Current Liabilities
Inventory is excluded because it may not be quickly convertible to cash. A ratio of 1:1 or higher is generally desirable.
存货被排除，因为它可能无法快速变现。一般来说，1:1 或更高的比率较为理想。
4. Profitability Ratios | 盈利能力比率
Profitability ratios assess a company’s ability to generate earnings relative to sales, assets, and equity.
盈利能力比率用于评价企业相对于销售、资产和股权创造利润的能力。
Gross Profit Margin = (Gross Profit ÷ Revenue) × 100%
This percentage reflects the efficiency of production and pricing. A higher margin suggests better control over direct costs.
该百分比反映生产和定价效率。毛利率越高，说明对直接成本的控制越好。
Net Profit Margin = (Net Profit ÷ Revenue) × 100%
Net profit is profit after all operating expenses, interest and tax. It shows overall operational efficiency.
净利润是扣除所有营业费用、利息和税费后的利润，体现了整体经营效率。
Return on Capital Employed (ROCE) = (Profit from Operations ÷ Capital Employed) × 100%
Capital employed is often defined as total assets less current liabilities, or equity plus non-current liabilities. ROCE indicates how well capital is being used to generate returns.
所用资本通常定义为总资产减去流动负债，或权益加非流动负债。ROCE 反映了资本创造回报的能力。
5. Efficiency Ratios | 效率比率
Efficiency ratios show how effectively a business uses its assets and manages its liabilities.
效率比率揭示企业利用资产和管理负债的有效程度。
Inventory Turnover (times) = Cost of Sales ÷ Average Inventory
Average inventory is (opening inventory + closing inventory) ÷ 2. Higher turnover suggests efficient inventory management.
平均存货 = (期初存货 + 期末存货) ÷ 2。周转率越高，表明存货管理越高效。
Inventory Turnover (days) = (Average Inventory ÷ Cost of Sales) × 365
This shows the average number of days inventory is held before being sold.
此比率显示存货在被销售前的平均持有天数。
Trade Receivables Turnover (days) = (Trade Receivables ÷ Revenue) × 365
Or when measures credit control: Trade Receivables (days) = (Trade Receivables ÷ Credit Sales) × 365. A lower figure indicates faster collection from customers.
或当衡量信用控制时：应收账款周转天数 = (应收账款 ÷ 赊销收入) × 365。数值越低表明收款速度越快。
Trade Payables Turnover (days) = (Trade Payables ÷ Credit Purchases) × 365
Sometimes cost of sales is used if purchases are not known. A longer period suggests better short-term liquidity, but may risk supplier relationships.
如果无法取得采购额，有时用销售成本代替。周转天数较长可能意味着短期流动性较好，但可能影响供应商关系。
Asset Turnover = Revenue ÷ Capital Employed (Net Assets)
This shows how many pounds of sales are generated from each pound of net assets.
该比率反映每一英镑净资产能产生多少销售额。
6. Investment Ratios | 投资比率
These ratios help shareholders and potential investors evaluate a company’s performance and future prospects.
这些比率有助于股东和潜在投资者评估公司业绩与未来前景。
Earnings Per Share (EPS) = (Net Profit – Preference Dividends) ÷ Number of Ordinary Shares Issued
EPS reflects the profit attributable to each ordinary share. It is a key driver of share price.
每股收益反映每一普通股应占的利润，是股价的重要驱动因素。
Price/Earnings (P/E) Ratio = Market Price per Share ÷ Earnings per Share
A high P/E ratio may indicate market confidence in future growth, while a low P/E may signal undervaluation or risk.
较高的市盈率可能表明市场对未来增长有信心，较低的市盈率可能暗示价值被低估或存在风险。
Dividend Yield = (Dividend per Share ÷ Market Price per Share) × 100%
This shows the return a shareholder receives in dividends relative to the share price.
股息率表示股东从股息中获取的相对于股价的回报率。
Dividend Cover = Profit after Tax and Preference Dividends ÷ Ordinary Dividends Paid
Dividend cover indicates how many times the company could have paid its dividend from available profits.
股息覆盖率表示公司可用利润支付股息的倍数。
7. Marginal Costing & Contribution | 边际成本与边际贡献
Marginal costing separates fixed and variable costs. Contribution is the surplus after deducting variable costs from sales revenue.
边际成本法将成本分为固定成本和变动成本。边际贡献是销售收入扣除变动成本后的余额。
Contribution per Unit = Selling Price per Unit – Variable Cost per Unit
Total contribution = Total Revenue – Total Variable Costs. Profit = Total Contribution – Fixed Costs.
总边际贡献 = 总收入 – 总变动成本。利润 = 总边际贡献 – 固定成本。
The contribution to sales (C/S) ratio is often used in short-term decision-making.
边际贡献率（C/S 比率）常用于短期决策。
C/S Ratio = (Contribution per Unit ÷ Selling Price per Unit) × 100%
Scarce resource decisions require ranking products by contribution per limiting factor (e.g. contribution per machine hour or per kg of material).
稀缺资源决策需要按制约因素的边际贡献排序（例如每机器小时或每千克材料的边际贡献）。
8. Inventory Management – EOQ | 库存管理 – 经济订货量
The Economic Order Quantity (EOQ) model minimises the total cost of holding and ordering inventory.
经济订货量（EOQ）模型最小化存货持有成本与订购成本的总和。
EOQ = √( (2 × Annual Demand × Order Cost per Order) ÷ Holding Cost per Unit per Annum )
Where annual demand is D, order cost is Co, and holding cost per unit is Ch. The square root gives the optimal order quantity.
其中年需求量为 D，每次订购成本为 Co，单位存货年持有成本为 Ch。开根号后得到最优订货量。
Total annual inventory cost at EOQ can be checked by: (EOQ/2 × Ch) + (D/EOQ × Co).
在 EOQ 水平下的年存货总成本可通过 (EOQ/2 × Ch) + (D/EOQ × Co) 来验证。
9. Depreciation Methods | 折旧方法
Depreciation allocates the cost of a non-current asset over its useful life. The two main methods are straight-line and reducing balance.
折旧将非流动资产的成本在其使用寿命内进行分摊。两种主要方法是直线法和余额递减法。
Straight-Line Depreciation = (Cost – Residual Value) ÷ Useful Life
This method charges an equal amount each year. It is appropriate where the asset provides equal benefits over time.
该方法每年计提等额折旧，适用于资产随时间提供均等效益的情况。
Reducing Balance Depreciation = Net Book Value at Start of Year × Depreciation Rate (%)
A fixed percentage is applied to the reducing balance. This results in higher charges in earlier years, which suits assets that lose value quickly.
固定的百分比应用于逐期递减的账面净值。这导致前几年费用较高，适合价值快速流失的资产。
10. Budgeting & Variance Analysis | 预算与差异分析
Variance analysis compares budgeted and actual figures to identify areas of under- or over-performance.
差异分析通过对比预算与实际数据，找出业绩不足或超预期的领域。
Sales Volume Variance = (Actual Sales Volume – Budgeted Sales Volume) × Standard Contribution per Unit
Or × Standard Profit per Unit if absorption costing is used. This isolates the effect of selling a different quantity.
若采用吸收成本法，则乘以单位标准利润。该差异反映了销售数量不同带来的影响。
Sales Price Variance = (Actual Selling Price – Budgeted Selling Price) × Actual Sales Volume
It measures the impact of charging a different price than planned.
该差异衡量收取的价格与计划不同所带来的影响。
Material Total Variance = (Standard Cost of Actual Output) – Actual Material Cost
This can be split into Material Price Variance and Material Usage Variance.
该差异可分解为材料价格差异和材料用量差异。
Material Price Variance = (Standard Price – Actual Price) × Actual Quantity Purchased
Material Usage Variance = (Standard Quantity for Actual Output – Actual Quantity Used) × Standard Price
Labour variances follow a similar pattern: Labour Rate Variance and Labour Efficiency Variance.
人工差异也遵循类似模式：工资率差异和人工效率差异。
Labour Rate Variance = (Standard Rate – Actual Rate) × Actual Hours Worked
Labour Efficiency Variance = (Standard Hours for Actual Output – Actual Hours Worked) × Standard Rate
Fixed overhead variances include expenditure and volume variances, but CCEA often focuses on the flexed budget approach and the identification of adverse (A) or favourable (F) variances.
固定制造费用差异包括支出差异和产量差异，但 CCEA 考试通常侧重于弹性预算方法以及识别不利差异 (A) 或有利差异 (F)。
11. Investment Appraisal | 投资评估
Investment appraisal techniques help businesses decide whether to commit funds to long-term projects.
投资评估技术帮助企业决定是否将资金投入长期项目。
Payback Period: the time taken for the initial investment to be recovered from net cash inflows.
When cash flows are uneven, cumulative cash flows are calculated until the initial outlay is covered.
回收期：收回初始投资所需的时间。当现金流不均匀时，需要计算累计现金流直到覆盖初始投资额。
Accounting Rate of Return (ARR) = (Average Annual Profit ÷ Average Investment) × 100%
Average investment = (Initial cost + Residual value) ÷ 2. ARR uses accounting profits, not cash flows.
平均投资额 = (初始成本 + 残值) ÷ 2。ARR 使用会计利润而非现金流量。
Net Present Value (NPV) = ∑ (Net Cash Flow in Period t ÷ (1 + Discount Rate)^t ) – Initial Investment
A positive NPV indicates the project yields a return above the cost of capital. Discount factors are provided or calculated using present value tables.
当 NPV 为正时，表明项目收益率高于资本成本。折现系数通常由现值表提供或自行计算。
The Internal Rate of Return (IRR) is the discount rate at which NPV = 0. It is often approximated using linear interpolation.
内部收益率 (IRR) 是使 NPV 等于零的折现率，通常采用线性内插法近似求得。
IRR ≈ L + [ (NPV at L) ÷ (NPV at L – NPV at H) ] × (H – L)
Where L is the lower discount rate and H is the higher discount rate. NPVs should have opposite signs.
其中 L 为较低的折现率，H 为较高的折现率，且两个 NPV 符号相反。
12. Other Key Concepts | 其他关键概念
Several other formulas and definitions are important across the CCEA Accounting course, particularly for A2 financial statements.
在 CCEA 会计课程中，还有一些公式和定义非常重要，尤其是针对 A2 财务报表。
| Concept | Formula / Explanation |
| Goodwill (Purchased) | Purchase Consideration – Fair Value of Net Assets Acquired |
| Gearing Ratio | (Long-Term Debt ÷ Capital Employed) × 100% ; or Debt ÷ Equity |
| Interest Cover | Profit from Operations ÷ Interest Payable |
| Working Capital Cycle | Inventory Days + Receivables Days – Payables Days |
| Limited Company Equity | Share Capital + Reserves (Share Premium, Retained Earnings, Revaluation Reserve) |
| Statement of Cash Flows | Net Cash from Operating, Investing and Financing Activities, plus opening balance, equals closing cash. |
Gearing represents the proportion of a company’s capital that comes from debt. High gearing indicates higher financial risk but could amplify returns.
杠杆比率表示公司资本中来自债务的比例。高杠杆意味着较高的财务风险，但也可能放大回报。
Interest cover shows the ability to pay interest out of operating profits. A cover of 2 or more is often considered safe.
利息覆盖率反映从营业利润中支付利息的能力。通常认为 2 倍或以上较为安全。
The working capital cycle measures the time between paying for inventories and receiving cash from customers. A shorter cycle improves liquidity.
营运资金周期衡量从支付存货款项到从客户处收回现金的时间。较短的周期有助于改善流动性。
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