Absorption costing and Variable Costing
*Absorption vs Variable Costing – Very Important Points* for CMA/CPA/CIMA 👇
*1. Basic Definition*
- *Absorption/Full Costing/Total costing*: Required by GAAP/IFRS for external reporting. Product cost /Inventoriable Costs/COGS = DM + DL + Variable mfg OH + *Fixed Mfg OH*. Fixed OH is “absorbed” into inventory.
- Volume based, It's tradional Costing system.
- *Variable/Direct/Marginal Costing*: Used for internal decision making. Product cost /Inventoriable Costs/COGS= DM + DL + Variable mfg OH only. *Fixed Mfg OH treated as period cost* and expensed immediately.
*2. Key Difference*
- *Treatment of Fixed Mfg OH* is the ONLY difference between both methods.
- All other costs treated same: DM, DL, Variable OH = product cost. _Selling/Admin_ = period cost in both.
*3. Profit Impact - Most Tested in Exams*
- *Production = Sales*: Profit same under both methods. No inventory change.
- *Production > Sales*: Inventory increases. *Absorption profit > Variable profit*. Reason: Some fixed OH deferred in ending inventory under absorption.
- *Sales > Production*: Inventory decreases. *Variable profit > Absorption profit*. Reason: Fixed OH from prior period inventory released to COGS under absorption.
- *Formula*: Difference in profit = Fixed OH rate per unit × Change in inventory units
Mfg fixed OH rate is callied as applied overhead or Overhead Absorption Rate=OAR=BUDGETED FIX MFG OH FOR THE PERIOD/ BUDGETED PRODUCTION QTTY.
*4. Income Statement Format*
- *Absorption*: Sales - COGS = *Gross Margin*. Then - Selling/Admin = Operating Income
- *Variable*: Sales - ALL Variable costs(MFG VARIABLE COST+NON MFG VARIABLE OH)= *Contribution Margin*. Then - Fixed costs(actual fix mfg OH+non mfg fixed OH)= Operating Income
- Only variable costing gives contribution margin. CMA loves CVP + contribution format.
*5. Advantages/Disadvantages*
*Absorption Pros*:
- GAAP/IFRS compliant. Matches fixed OH to revenue when sale happens
- Shows full cost of production for pricing long-term
*Absorption Cons*:
- Managers may overproduce to boost profit by putting fixed OH into inventory
- Not useful for CVP, make-buy, special order decisions
*Variable Pros*:
- Fixed cost clearly visible. No incentive to overproduce
- Direct link to CVP analysis, BEP, contribution margin
- Better for short-term decisions
*Variable Cons*:
- Not GAAP/IFRS compliant for external reports
- Ignores fixed OH in inventory valuation
*6. CMA/CPA Exam Traps*
- *Inventory valuation*: Absorption inventory higher by “Fixed OH rate × units in inventory”
- *Overhead volume variance*: Exists only in absorption costing. No variance in variable costing
- *Reconciliation*: Always reconcile: Absorption OI = Variable OI ± Fixed OH in inventory change
- *Decision making*: Use variable costing for special order, shutdown, product mix. Ignore fixed OH if unavoidable
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based on the notes above, here are *10 MCQs with answers on Absorption vs Variable Costing* in CMA/CPA style:
*MCQs + Answers*
*1. Basic Definition*
Under GAAP/IFRS, which costing method must be used for external financial reporting?
A. Variable costing
B. Direct costing
C. Absorption costing
D. Marginal costing
*Answer: C. Absorption costing*
Note: Only absorption includes Fixed Mfg OH in product cost.
*2. Key Difference*
What is the ONLY difference between absorption and variable costing?
A. Treatment of direct materials
B. Treatment of selling/admin costs
C. Treatment of fixed manufacturing OH
D. Treatment of direct labor
*Answer: C. Treatment of fixed manufacturing OH*
Note: DM, DL, Variable OH = product cost in both. S&A = period cost in both.
*3. Profit Impact*
Company produces 10,000 units, sells 8,000 units. Fixed Mfg OH = $200,000. Which statement is TRUE?
A. Variable profit > Absorption profit
B. Absorption profit > Variable profit
C. Both profits equal
D. Cannot determine
*Answer: B. Absorption profit > Variable profit*
Calc: Inventory ↑ by 2,000 units. Fixed OH deferred = $200,000/10,000 × 2,000 = $40,000. Absorption profit higher.
*4. Formula Application*
Fixed Mfg OH $120,000. Budgeted production 12,000 units. Actual: produced 12,000, sold 9,000. Profit difference?
A. $0
B. $30,000 higher under variable
C. $30,000 higher under absorption
D. $120,000 higher under absorption
*Answer: C. $30,000 higher under absorption*
OH rate = 120,000/12,000 = $10/unit. Inventory ↑ = 3,000 units. Diff = 10 × 3,000 = $30,000.
*5. Income Statement Format*
Which income statement shows “Contribution Margin”?
A. Absorption costing only
B. Variable costing only
C. Both absorption and variable
D. Neither
*Answer: B. Variable costing only*
Note: Absorption shows Gross Margin. Only variable shows CM = Sales – All variable costs.
*6. Inventory Valuation*
Ending inventory = 5,000 units. Fixed OH rate = $6/unit. How much higher is absorption inventory vs variable inventory?
A. $0
B. $5,000
C. $30,000
D. $6/unit
*Answer: C. $30,000*
Absorption inventory = Variable inventory + 6 × 5,000 = +$30,000.
*7. Overhead Variance*
Which variance exists only under absorption costing, not variable costing?
A. Material price variance
B. Labor efficiency variance
C. Fixed overhead volume variance
D. Variable overhead spending variance
*Answer: C. Fixed overhead volume variance*
Note: Volume variance occurs because fixed OH applied ≠ budgeted fixed OH when production ≠ denominator level.
*8. Decision Making*
For a special order at price above variable cost but below full cost, which method should be used?
A. Absorption costing, because it shows full cost
B. Variable costing, because fixed OH is sunk
C. Neither, reject all orders below full cost
D. Absorption costing for external, variable for internal
*Answer: B. Variable costing*
Note: CMA trap: Use variable costing for short-term decisions. Fixed OH is unavoidable so irrelevant.
*9. Production = Sales*
If production units = sales units, which is TRUE?
A. Absorption profit > Variable profit
B. Variable profit > Absorption profit
C. Both profits equal
D. Absorption COGS > Variable COGS
*Answer: C. Both profits equal*
Note: No inventory change → no fixed OH deferred/released.
*10. Reconciliation*
Variable costing operating income = $80,000. Fixed OH rate = $4/unit. Beginning inventory 0, ending inventory 2,000 units. Absorption OI = ?
A. $72,000
B. $80,000
C. $88,000
D. $96,000
*Answer: C. $88,000*
Inventory ↑ → Absorption OI = Variable OI + Fixed OH deferred = 80,000 + 4×2,000 = $88,000.
*CMA Memory Rule*:
“UP = Absorption UP, DOWN = Variable UP”
Inventory UP → Absorption profit UP
Inventory DOWN → Variable profit UP.


