A to Z Costing Knowledge Glossary — Letter G
Investopedia-style costing concepts explained with formulas, practical examples, comparisons, and exam-focused teaching tips.
1 Gantt Chart
| Category | Production Planning / Operations |
|---|---|
| Best Used In | Job scheduling, tracking idle time, batch processing |
| Key Formula | Visual plotting tool (No specific numerical formula) |
| Exam Importance | Low-Medium |
A Gantt Chart is a visual project management tool—a horizontal bar chart—that displays a production schedule. It illustrates the start and finish dates of various elements (like jobs, machine operations, or batches) over a timeline.
In cost accounting and operations, it is used to plan, coordinate, and track specific tasks against time. It helps production managers instantly see machine utilization, potential bottlenecks, and idle time.
- Scheduling complex jobs across multiple factory machines
- Tracking standard time vs. actual time taken for labour tasks
- Identifying and minimizing idle capacity
A factory manager uses a Gantt Chart to schedule Machine A to cut steel on Monday, while Machine B bends the steel on Tuesday. If Machine A is delayed, the chart visually shows how it delays Machine B, allowing rapid rescheduling.
Job 101 needs 3 days on the lathe and 2 days for assembly. On a timeline, a blue bar spans Days 1-3 for the lathe, and a green bar spans Days 4-5 for assembly. A red vertical line represents “Today,” showing if the job is ahead or behind schedule.
- Identify all discrete tasks or jobs required.
- Determine standard time and dependencies (which job must finish before another starts).
- Plot tasks as horizontal bars on a calendar/timeline axis.
- Update daily with actual progress to identify variances.
| Gantt Chart vs. PERT/CPM | A Gantt chart focuses heavily on a linear time scale; PERT/CPM focuses on the logical dependencies and the critical path of the project. |
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2 Goal Congruence
| Category | Responsibility Accounting / Performance Evaluation |
|---|---|
| Best Used In | Transfer pricing, divisional budgeting, incentive design |
| Key Formula | Divisional Goal = Corporate Goal |
| Exam Importance | Very High (Theory) |
Goal Congruence occurs when the individual objectives of managers and departments naturally align with the overall strategic objectives of the entire organization.
In management accounting, it is the fundamental aim of designing performance metrics and transfer prices. If a system has goal congruence, a manager acting in their own selfish best interest will simultaneously maximize the company’s total profit.
- Setting internal Transfer Prices between divisions
- Designing executive bonus structures
- Creating departmental KPIs and budgets
If the HR team’s bonus is based purely on hiring fast, they might hire low-quality workers, which hurts the factory’s defect rate. To achieve goal congruence, HR’s bonus should include a metric for employee retention or quality, aligning their goals with the factory’s success.
Division A makes batteries; Division B makes cars. If Division A charges a huge transfer price, Division B might buy batteries from an outside supplier. This hurts the company as a whole if the external price is higher than Division A’s variable cost. A properly set transfer price ensures Goal Congruence, so B buys internally.
The general rule to achieve goal congruence in transfer pricing.
- Identify the overall corporate objective (e.g., maximize total firm profit).
- Set the performance measurement for the individual manager (e.g., divisional ROI).
- Test hypothetical decisions: Will maximizing Divisional ROI accidentally lower Total Firm Profit?
- Adjust policies (like internal pricing) until both move in the same direction.
| Goal Congruence vs. Sub-optimization | Sub-optimization is the failure of goal congruence, where a division maximizes its own profit at the expense of the overall company. |
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3 Going Concern Concept
| Category | Fundamental Accounting Principles |
|---|---|
| Best Used In | Asset valuation, depreciation spreading in overheads |
| Key Formula | Depreciable Life > 1 Year (Justified by this concept) |
| Exam Importance | Medium |
The Going Concern Concept is the fundamental assumption that a business will continue to operate indefinitely into the foreseeable future and has no intention (or need) to liquidate.
In cost accounting, this principle is the sole justification for charging depreciation over many years. Because we assume the factory will stay open, we spread the cost of heavy machinery across future production periods instead of charging the entire cost to this year’s batch of products.
- Spreading fixed asset costs via depreciation
- Valuing closing inventory at cost (not liquidation value)
- Absorbing long-term deferred revenue expenditures
When computing a Machine Hour Rate, the accountant spreads the ₹10 Lakh cost of a machine over an estimated 10-year life. If the business was closing next month, the machine would have to be valued at scrap value, drastically changing the hourly cost rate.
A company buys a blast furnace for ₹5 Crores with a 20-year life. Because of the Going Concern assumption, the cost accountant only charges ₹25 Lakhs (straight-line depreciation) to this year’s production overheads, rather than charging ₹5 Crores to current products, which would make pricing impossible.
This formula only exists because of the Going Concern concept.
- Determine the total capital expenditure.
- Estimate the useful economic life based on the assumption the firm remains open.
- Divide the cost logically across those years.
- Absorb that annual slice into product costs via overhead rates.
| Going Concern vs. Liquidation Value | Going concern allows assets to be held at historical cost minus depreciation. Liquidation values assets at their immediate fire-sale market price. |
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4 Goodwill Treatment in Costing
| Category | Cost Bookkeeping / Reconciliation |
|---|---|
| Best Used In | Reconciling Cost and Financial Accounts |
| Key Formula | Financial Profit + Items ignored in Costing (like Goodwill written off) = Costing Profit |
| Exam Importance | Very High |
Goodwill represents the intangible value of brand and reputation. In pure Cost Accounting, financial transactions that have absolutely nothing to do with the physical manufacturing or service process are completely excluded.
Items like “Goodwill Written Off” or “Preliminary Expenses Written Off” are purely financial appropriations. They are never included in a Cost Sheet. Because they are recorded in Financial P&L but ignored in Cost P&L, they cause a difference in profits that must be reconciled.
- Preparing Cost Sheets (Exclusion list)
- Memorandum Reconciliation Statements
- Preventing distortion of per-unit manufacturing costs
If a company writes off ₹50,000 of goodwill this year, the financial profit drops by ₹50,000. However, the cost accountant ignores this entirely, because writing off brand value doesn’t make a physical product cost more to manufacture. This keeps pricing decisions clean.
Financial Profit = ₹2,00,000 (after debiting ₹20,000 Goodwill Write-off). Costing Profit has no such debit. To reconcile: Take Financial Profit (₹2,00,000), ADD BACK the item debited only in financial accounts (₹20,000) = Costing Profit (₹2,20,000).
- Scan the problem for purely financial items (Goodwill, Donations, Income Tax).
- Strictly exclude these from any Cost Sheet or overhead absorption calculation.
- During Reconciliation, if starting with Financial Profit, ADD these expenses back to arrive at the higher Costing Profit.
| Goodwill vs. Patents/Trademarks | Patents/Royalties tied directly to producing a product are included in cost accounts (as Direct Expenses). Pure Goodwill is always excluded. |
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5 Gross Margin (Gross Profit)
| Category | Profitability Analysis |
|---|---|
| Best Used In | Cost sheets, pricing strategy, margin analysis |
| Key Formula | Gross Margin = Sales − Cost of Goods Sold (COGS) |
| Exam Importance | High |
Gross Margin is the primary measure of production profitability. It is the amount of money left over from sales revenue after subtracting all direct and indirect manufacturing costs required to make the product.
It acts as the first layer of profit. It tells management whether the core manufacturing process is profitable enough to leave room to pay for office administration, selling expenses, and still generate a final net profit.
- Cost Sheet preparation (Sales – Cost of Sales)
- Evaluating factory efficiency
- Setting base markup pricing
A clothing brand sells a jacket for ₹2,000. It costs ₹1,200 to manufacture (materials, labour, factory rent). The Gross Margin is ₹800 (or 40%). The business uses this ₹800 to cover marketing, CEO salaries, and net profit.
Sales = ₹5,00,000. Opening Stock = ₹50,000. Cost of Production = ₹3,00,000. Closing Stock = ₹20,000.
COGS = (50,000 + 3,00,000 – 20,000) = ₹3,30,000.
Gross Margin = 5,00,000 – 3,30,000 = ₹1,70,000.
Gross Margin % = Gross MarginNet Sales × 100
- Calculate Net Sales (Total Sales minus returns).
- Calculate Cost of Goods Sold (Opening FG + Cost of Production – Closing FG).
- Subtract COGS from Sales to find the raw Gross Profit amount.
- Divide by Sales to find the percentage margin for easy product comparison.
| Gross Margin vs. Contribution Margin | Gross Margin deducts fixed factory overheads (absorption costing). Contribution Margin only deducts variable costs (marginal costing). |
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| Gross Margin vs. Net Profit | Net profit further subtracts admin, selling, and financial costs from the gross margin. |
6 Gross Wages
| Category | Labour Costing |
|---|---|
| Best Used In | Calculating Direct Labour cost, Payroll accounting |
| Key Formula | Basic Pay + DA + Overtime + Allowances |
| Exam Importance | Medium |
Gross Wages represent the total earnings of an employee for a specific period before any statutory or voluntary deductions (like Provident Fund, Income Tax/TDS, or advances) are subtracted.
In cost accounting, we care about what the employee earned, not what they took home. Gross wages form the foundation of calculating the true cost of labour to the employer (which is Gross Wages + Employer’s share of statutory contributions).
- Preparing payroll sheets
- Calculating Direct Labour Hour Rates for job costing
- Allocating labour costs to specific departments
A worker earns ₹20,000 basic, plus ₹5,000 overtime. Gross wages are ₹25,000. The employer deducts ₹3,000 for tax and PF, giving a net pay of ₹22,000. The cost accountant ignores the ₹22,000; the cost to the job is based on the ₹25,000 gross figure (plus employer PF).
Worker A: Basic ₹500/day + DA ₹100/day. Works 25 days.
Gross Wages = (500 + 100) × 25 = ₹15,000.
Employee PF deduction of ₹1,500 is ignored for calculating the Gross Wage.
- Calculate base time-rate or piece-rate earnings.
- Add overtime premiums earned.
- Add Dearness Allowance and incentive bonuses (like Halsey/Rowan).
- Rule: Do NOT subtract employee PF or TDS to find this figure.
| Gross Wages vs. Net Wages | Gross is total earned (used for cost calculation); Net is take-home pay after deductions (used for cash flow/bank payments). |
|---|---|
| Gross Wages vs. Total Labour Cost | Total Labour Cost = Gross Wages + Employer’s contribution to PF/ESI + fringe benefits. |
7 Group Bonus Scheme
| Category | Labour Costing / Incentive Systems |
|---|---|
| Best Used In | Assembly lines, continuous manufacturing processes |
| Key Formula | Total Time Saved by Group × Bonus Rate (Split among team) |
| Exam Importance | High |
A Group Bonus Scheme is a collective incentive plan where a bonus is calculated based on the combined output or efficiency of a whole team, rather than an individual worker, and then distributed among the team members.
It is used when it is impossible to measure an individual’s specific output because the workflow is continuous (e.g., car assembly, chemical processing). It fosters teamwork and peer pressure to maintain efficiency.
- Conveyor belt / Assembly line manufacturing
- Process costing industries
- Reducing individual bottlenecks
An assembly team of 5 workers is given a standard time of 100 hours to build an engine. If they finish it in 80 hours, the 20 hours saved generates a bonus pool. This pool is then split among the 5 workers based on their base wage ratios.
Standard time for Group = 200 hrs. Actual time taken = 160 hrs. Time saved = 40 hrs. Rate = ₹50/hr.
Under Halsey (50%), Total Bonus = 50% × 40 hrs × ₹50 = ₹1,000.
If Worker A and Worker B have base wages in a 3:2 ratio, Worker A gets ₹600 bonus, Worker B gets ₹400.
Individual Share = Group Bonus Pool × Individual Base WageTotal Group Base Wage
- Identify standard time allowed for the entire team’s output.
- Subtract actual total hours worked by the team to find Total Time Saved.
- Calculate the bonus pool using Halsey (50% of time saved) or Rowan.
- Apportion the bonus to individuals, usually based on their basic wages or hours worked.
| Group Bonus vs. Individual Piece Rate | Group fosters teamwork and overall throughput; Individual rate can cause bottlenecks if one worker is too fast for the next station. |
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8 Guaranteed Minimum Wage
| Category | Labour Costing |
|---|---|
| Best Used In | Piece-rate systems, handling abnormal idle time |
| Key Formula | Earnings = Higher of (Piece Rate Output) OR (Guaranteed Minimum) |
| Exam Importance | High |
Guaranteed Minimum Wage is a labor policy ensuring that workers on a piece-rate system (paid per unit produced) receive a fixed basic daily or hourly wage, even if their output falls short due to reasons beyond their control.
It provides a safety net. If a worker’s piece-rate earnings are lower than the minimum guarantee, the employer “makes up” the difference. This make-up pay is usually treated as a factory overhead (idle time/inefficiency cost), not as direct labour.
- Protecting workers during power failures or machine breakdowns
- Taylor’s or Merrick’s differential piece-rate systems
- Compliance with labour laws
A garment worker is paid ₹50 per shirt, with a guaranteed minimum of ₹400/day. Due to a machine jam, they only sew 6 shirts (6 × 50 = ₹300). The factory pays them the guaranteed ₹400. The extra ₹100 is charged to factory overheads.
Guaranteed Wage = ₹500/day. Piece Rate = ₹25/unit.
Worker A produces 25 units (25 × 25 = ₹625). Paid: ₹625 (No guarantee needed).
Worker B produces 15 units (15 × 25 = ₹375). Paid: ₹500 (Guarantee kicks in; ₹125 is overhead).
- Calculate earnings based purely on output (units produced × piece rate).
- Calculate the guaranteed time wage (hours worked × hourly rate).
- Compare the two figures.
- Pay the higher amount.
- Transfer any shortfall (unearned wages) to overheads.
| Guaranteed Minimum vs. Straight Piece Rate | Straight piece rate means zero output equals zero pay. Guaranteed minimum protects against abnormal conditions. |
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9 GST Treatment in Costing
| Category | Material Costing / Statutory Compliance |
|---|---|
| Best Used In | Valuing raw material purchases, Cost Sheet preparation |
| Key Formula | Cost = Invoice Price (Exclude GST if ITC is available) |
| Exam Importance | Very High |
Goods and Services Tax (GST) is an indirect tax on purchases. In cost accounting, the fundamental rule is that taxes and duties are only treated as a “cost” if they cannot be recovered from the government.
If a business can claim Input Tax Credit (ITC) on the GST paid for raw materials, the GST amount is strictly excluded from the material cost. If ITC is blocked or not available, the GST becomes a non-recoverable expense and is added to the material cost.
- Preparing Stores Ledger (FIFO/Weighted Average rates)
- Calculating prime cost in a Cost Sheet
- Pricing decisions
You buy steel for ₹1,00,000 + 18% GST (₹18,000). Because you are a registered manufacturer, you will offset that ₹18,000 against your sales tax liability. Therefore, your true cost for the steel is only ₹1,00,000. You enter ₹1,00,000 in your cost books.
Invoice base price = ₹50,000. Trade discount = 10%. CGST & SGST = ₹5,400. Freight = ₹2,000.
Scenario A (ITC Available): Cost = (50,000 – 5,000) + 2,000 = ₹47,000. (GST ignored).
Scenario B (ITC Blocked): Cost = (50,000 – 5,000) + 5,400 + 2,000 = ₹52,400.
- Start with the base purchase price.
- Deduct any trade discounts (always deducted).
- Check the problem for the phrase: “Input credit is available” vs “Input credit not available”.
- If ITC is available, completely ignore the GST amount in your costing sum.
- If ITC is unavailable, add the GST amount into the total cost.
| Cost with ITC vs. Cost without ITC | ITC acts like a refund from the government. You cannot charge your customer for a cost that the government is already refunding you. |
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