Marginal Costing - ICAI Knowledge Gateway

Paper 3A: Cost Accounting Chapter 9
CA. Dharmendra Gupta
Introduction
Cost classification
Profit Volume Ratio ( P V ) ratio
Break Even Point
Margin of Safety
Shut Down Point
Cost Indifference Point
Cash Break Even point
Break even charts & Angle of Incidence
Marginal Costing Vs. Absorption Costing
Technique of Costing
For Managerial Decision Making
To Measure Profitability of Products
To study Cost Volume Profit Analysis
On the basis of nature of costs
Mainly Fixed and Variable costs
Costs
Fixed
Variable
Semi
Variable
Cost Classification
Fixed Cost
Variable Costs
Semi Variable
Costs :
Change with Level
of Activity
Changes in exact
proportion with level
of Activity
Changes with level
of activity but not in
exact proportion
Example: Rent,
Salary etc.
Example: Material,
Labour etc
Example:
Maintenance costs
etc
Relation between Contribution and Sales
Also Known as Contribution to Sales Ratio
P V Ratio =
•
•
•
•
•
•
•
•
•
Total Contribution/Total Sales
Contribution per unit/Sales per unit
( Fixed Cost + Profit )/ Sales
( Sales- Variable costs)/ Sales
1- Variable Cost Ratio
Profit/ Margin of Safety
Fixed Costs / Break Even Point
Change in Contribution/Change in sales
Change in Profit /Change in Sales
Sales Where Total Costs is equal to Total Sales
• Total costs = Fixed Costs + Variable Costs
At BEP There is No Profit or No Loss
Total Contribution = Fixed Costs
• Contribution =( Sales – Variable costs) or Fixed costs + Profit)
BEP ( in units) =
• Total Fixed Costs/Contribution per unit
BEP ( in amount) =
• Total Fixed costs / Profit Volume Ratio
Excess of Sales over Break Even Sales
MOS = Sales – BEP
Alternatively MOS =
• Profit / Contribution per unit
• Profit / P V Ratio
Profit = MOS x P V Ratio
P V Ratio = Profit / MOS
( in units)
( in amount)
Sales below which Business can not be persued
Temporary Closure of Business To Avoid Off Season, Recession etc
Here Business must be able to generate Avoidable Fixed Costs
• Avoidable Fixed Costs = Total Fixed Costs – Minimum or unavoidable fixed
costs
Shut Down Point =
• Avoidable Fixed Costs / Contribution p.u. (in units )
• Avoidable Fixed Costs / P V Ratio ( in amount )
Activity Level at which Two
different Options result in same
Costs
Cost Indifference Point =
• Change in Fixed Costs /Change in
variable Costs per unit
Here Only Cash Fixed Costs are Considered
Non cash costs like Depreciation etc are not
Considered
Cash Break Even Point =
• Cash Fixed Costs / Contribution p u
• Cash Fixed Costs / P V Ratio
( in units)
(in amount)
Break Even Chart With Angle Of Incidence
25
Cost & Revenue
20
15
TC
TR
10
5
0
1
2 Units
Break Even Point
3
4
Costs are
classified on the
Basis of Functions
All costs of
production
(Fixed or Variable)
are included in
Inventory
Valuation
less:
less:
less:
less:
less:
sales value
Direct materials
Direct labour
Factory overheads
Gross profit
Administrative expense
Selling & Distribution expense
Net profit
xxxx
(xxxx)
(xxxx)
(xxxx)
xxxx
(xxxx)
(xxxx)
xxxx
Sales
Less: Variable Costs
D. Material
D. Labour
D. Expenses
Var. Production Overheads
Var. Selling & Distribution Overheads
Contribution
Less: Fixed Costs
Fixed Production Overheads
Administrative Overheads
Fixed Selling & Distribution Overheads
Net Profit
xx
xx
xx
xx
xx




A Company produces a product whose Selling
Price is Rs. 25 per unit.
Variable Cost is Rs. 15 per unit and Total fixed
Cost is Rs. 15000.
Company is producing and selling 20000 units
Find
◦
◦
◦
◦
◦
Contribution per unit
P V Ratio
Break Even Point
Margin of safety
Shut Down Point if Minimum Fixed Cost is Rs. 10000








Contribution per unit = Sales – Variable cost
Hence Contribution per unit=Rs.25-15=Rs.10
P V Ratio=Contribution /Sales
So, P V Ratio=10/25=40%
Break Even Point = Total Fixed Cost /PV Ratio
So, Break Even Point= 15000/40%=Rs.37500
Note : Break even Point can also computed in
terms of units.
In that case
◦ BEP=Total fixed Costs /Contribution Per Unit
◦ BEP =15000/10=1500 units

Margin of Safety (MOS) = Sales – BEP
MOS ( in units ) = 2000- 1500 =500 units
MOS (in amount) =2000 * 25 -37500

Shut down point =


◦ =Rs. 12500
◦ Avoidable fixed cost/contribution per unit (in units )
◦ Avoidable Fixed cost / PV Ratio
( in amount)
 Note : Avoidable Fixed Cost =
 Total Fixed Cost – Minimum Fixed Cost
 Rs. 15000 – 10000 = Rs. 5000


Shut Down Point = Rs. 5000/10 = 500 units
Shut Down Point =Rs. 5000/ 40% =Rs 12500




A Company is to select a machine out of 2
machines A & B.
Machine A has a Fixed Cost of Rs. 20000 and
Variable Cost of Rs.20 per unit
While Machine B has a Fixed Cost Rs. 10000 and
Variable Cost of Rs.25 per unit
Find Cost Indifference Point

Cost Indifference point =
◦
◦
◦
◦

Change in Total Fixed Cost /Change in Var. Cost per unit
Change in Total Fixed Cost =
Rs. 20000-10000=Rs.10000
Change in Var. Cost per unit = Rs. 25 -20 = Rs. 5
Cost Indifference Point = Rs. 10000/Rs. 5
◦ 2000 units
◦

We now have a better understanding of following
aspects:
1
• Cost classification
2
• Profit Volume Ratio - PV Ratio
3
• Break Even Point
4
• Margin of Safety
5
• Shut Down Point
6
• Cost Indifference Point
7
• Cash Break Even point
8
• Break Even Charts & Angle of Incidence
9
• Marginal Costing Vs. Absorption Costing