Transcript Absorption and marginal costing MOTI THIRUMALA RAJU MOTI THIRUMALA 1

Absorption and marginal costing
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MOTI THIRUMALA
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Introduction


Before we allocate all manufacturing costs
to products regardless of whether they are
fixed or variable. This approach is known
as absorption costing/full costing
However, only variable costs are relevant
to decision-making. This is known as
marginal costing/variable costing
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Definition


Absorption costing
Marginal costing
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Absorption costing

It is costing system which treats all
manufacturing costs including both the
fixed and variable costs as product costs
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Marginal costing

It is a costing system which treats only the
variable manufacturing costs as product
costs. The fixed manufacturing overheads
are regarded as period cost
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Absorption Costing
Cost
Manufacturing cost
Direct
Materials
Direct
Labour
Non-manufacturing cost
Overheads
Finished goods
Period cost
Cost of goods sold
Profit and loss account
Marginal Costing
Cost
Manufacturing cost
Direct
Materials
Direct
Labour
Finished goods
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Non-manufacturing cost
Variable
Overheads
Fixed
overhead
Cost of goods sold
Period cost
Profit and loss account
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Presentation of costs on income
statement
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Trading and profit ans loss account
Absorption costing
Sales
Less: Cost of goods sold
Gross profit
Less: Expenses
Selling expenses X
Admin. expenses X
Other expenses X
Marginal costing
$
X
X
X
X
Variable and fixed manufacturing
Net Profit
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X
Sales
Less: Variable cost of
Goods sold
Product contribution margin
$
X
X
X
Less: variable non- manufacturing
expenses
Variable selling expenses
Variable admin. expenses
Other variable expenses
Total contribution expenses
X
X
X
X
Less: Expenses
Fixed selling expenses
Fixed admin. expenses
Other fixed expenses
Net Profit
X
X
X
X
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Example
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A company started its business in 2005. The following information
Was available for January to March 2005 for the company that produced
A single product:
$
Selling price pre unit
100
Direct materials per unit
20
Direct Labour per unit
10
Fixed factory overhead per month
30000
Variable factory overhead per unit
5
Fixed selling overheads
1000
Variable selling overheads per unit
4
Budgeted activity was expected to be 1000 units each month
Production and sales for each month were as follows:
Jan
Feb
March
Unit sold
1000
800
1100
Unit produced
1000
1300
900
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
Required:

Prepare absorption and marginal costing
statements for the three months
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Absorption costing
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January
$
Sales
100000
Less: cost of good sold ($65) 65000
Adjustment for Over-/(under)
Absorption of factory overhead
Gross profit
35000
Less: Expenses
Fixed selling overheads 1000
Variable selling overheads 4000
Net profit
30000
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February
$
80000
52000
28000
March
$
110000
71500
38500
9000
37000
(3000)
35500
1000
3200
32800
1000
4400
30100
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Marginal costing
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January
$
100000
Sales
Less: Variable cost of good
sold ($35)
35000
Product contribution margin 65000
Less: Variable selling overhead4000
Total contribution margin
61000
Less: Fixed Expenses
Fixed factory overhead 30000
Fixed selling overheads 1000
Net profit
30000
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February
$
80000
March
$
110000
28000
52000
3200
48800
385500
71500
4400
67100
30000
1000
32800
30000
1000
30100
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Wk1:
Standard fixed overhead rate
= Budgeted total fixed factory overheads
Budgeted number of units produced
=
$30000
1000 units
= $30 units
Wk 2:
Production cost per unit under absorption costing:
Direct materials
Direct labour
Fixed factory overhead absorbed
Variable factory overheads
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$
20
10
30
5
65
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Wk 3:
(Under-)/Over-absorption of fixed factory overheads:
January
February
March
$
$
$
Fixed overhead
30000
39000
27000
Fixed overheads incurred 30000
30000
30000
0
9000
(3000)
1000*$30
1300*$30
900*$30
No fixed factory overhead
Wk 4:
Variable production cost per unit under marginal costing:
$
Direct materials
20
Direct labour
10
Variable factory overhead
5
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Difference between absorption
and marginal costing
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Absorption costing
Treatment for Fixed
fixed
manufacturing
manufacturing overheads are
overheads
treated as product
costing. It is
believed that
products cannot be
produced without
the resources
provided by fixed
manufacturing
overheads
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Marginal costing
Fixed manufacturing
overhead are treated
as period costs. It is
believed that only the
variable costs are
relevant to decisionmaking.
Fixed manufacturing
overheads will be
incurred regardless
there is production or
not
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Value of
closing stock
Absorption costing
High value of
closing stock will be
obtained as some
factory overheads
are included as
product costs and
carried forward as
closing stock
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Marginal costing
Lower value of
closing stock that
included the variable
cost only
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Absorption costing
Marginal costing
Reported If the production = Sales, AC profit = MC Profit
profit
If Production > Sales, AC profit > MC profit
As some factory overhead will be deferred as
product costs under the absorption costing
If Production < Sales, AC profit < MC profit
As the previously deferred factory overhead
will be released and charged as cost of goods
sold
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Argument for absorption costing
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
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Compliance with the generally accepted
accounting principles
Importance of fixed overheads for production
Avoidance of fictitious profit or loss
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During the period of high sales, the production is
small than the sales, a smaller number of fixed
manufacturing overheads are charged and a higher
net profit will be obtained under marginal costing
Absorption costing is better in avoiding the
fluctuation of profit being reported in marginal
costing
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Arguments for marginal costing
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
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More relevance to decision-making
Avoidance of profit manipulation
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Marginal costing can avoid profit manipulation by
adjusting the stock level
Consideration given to fixed cost

In fact, marginal costing does not ignore fixed costs
in setting the selling price. On the contrary, it
provides useful information for break-even analysis
that indicates whether fixed costs can be converted
with the change in sales volume
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Break-even analysis
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Definition

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Breakeven analysis is also known as costvolume profit analysis
Breakeven analysis is the study of the
relationship between selling prices, sales
volumes, fixed costs, variable costs and
profits at various levels of activity
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Application
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Breakeven analysis can be used to
determine a company’s breakeven point
(BEP)
Breakeven point is a level of activity at
which the total revenue is equal to the total
costs
At this level, the company makes no profit
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Assumption of breakeven point
analysis
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Relevant range
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Fixed cost
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The relevant range is the range of an activity over
which the fixed cost will remain fixed in total and the
variable cost per unit will remain constant
Total fixed cost are assumed to be constant in total
Variable cost
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Total variable cost will increase with increasing
number of units produced
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Sales revenue

The total revenue will increase with the
increasing number of units produced
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Cost $
Total cost
Variable cost
Fixed cost
Sales (units)
Total Cost/Revenue $
Sales revenue
Profit
Total cost
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BEP
Sales (units)
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Calculation method
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Calculation method
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Breakeven point
Target profit
Margin of safety
Changes in components of breakeven
analysis
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Breakeven point
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Calculation method

Contribution is defined as the excess of
sales revenue over the variable costs
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The total contribution is equal to total fixed
cost
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Formula
Breakeven point
Fixed cost
=
Contribution per unit
Sales revenue at breakeven point
= Breakeven point *selling price
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Alternative method:
Sales revenue at breakeven point
Contribution required to breakeven
=
Contribution to sales ratio Contribution per unit
Selling price per unit
Breakeven point in units
Sales revenue at breakeven point
=
Selling price
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Example
Selling price per unit
 Variable cost per unit
 Fixed costs
Required:


$12
$3
$45000
Compute the breakeven point
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Breakeven point in units =
Fixed costs
Contribution per unit
= $45000
$12-$3
= 5000 units
Sales revenue at breakeven point = $12 * 5000 = $60000
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Alternative method
Contribution to sales ratio $9 /$12 *100% = 75%
Sales revenue at breakeven point
= Contribution required to break even
Contribution to sales ratio
= $45000
75%
= $60000
Breakeven point in units = $60000/$12 = 5000 units
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Target profit
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Formula
No. of units at target profit
Fixed cost + Target profit
=
Contribution per unit
Required sales revenue
Fixed cost + Target profit
=
Contribution to sales ratio
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Example
Selling price per unit
 Variable cost per unit
 Fixed costs
 Target profit
Required:


$12
$3
$45000
$18000
Compute the sales volume required to achieve
the target profit
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No. of units at target profit
Fixed cost + Target profit
=
Contribution per unit
$45000 + $18000
=
$12 - $3
= 7000 units
Required to sales revenue = $12 *7000
= $84000
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Alternative method
Required sales revenue
Fixed cost + Target profit
=
Contribution to sales ratio
$45000 + $18000
=
75%
= $84000
Units sold at target profit = $84000 /$12 = 7000 units
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Margin of safety
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Margin of safety


Margin of safety is a measure of amount by
which the sales may decrease before a
company suffers a loss.
This can be expressed as a number of units
or a percentage of sales
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Formula
Margin of safety
= Budget sales level – breakeven sales level
Margin of safety
= Margin of safety *100%
Budget sales level
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Sales revenue
Total Cost/Revenue $
Profit
BEP
Total cost
Sales (units)
Margin of safety
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Example
The breakeven sales level is at 5000 units.
The company sets the target profit at
$18000 and the budget sales level at 7000
units
Required:
Calculate the margin of safety in units and
express it as a percentage of the budgeted
sales revenue

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Margin of safety
= Budget sales level – breakeven sales level
= 7000 units – 5000 units
= 2000 units
Margin of safety
= Margin of safety *100 %
Budget sales level
= 2000 *100 %
7000
= 28.6%
The margin of safety indicates that the actual sales can fall by
2000 units or 28.6% from the budgeted level before losses are
incurred.
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Changes in components of
breakeven point
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Example
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Selling price per unit
Variable price per unit
Fixed costs
Current profit
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$12
$3
$45000
$18000
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
If the selling prices is raised from $12 to
$13, the minimum volume of sales required
to maintain the current profit will be:
Fixed cost + Target profit
=
Contribution to sales ratio
$45000 + $18000
$13 - $3
= 6300 units
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
If the fixed cost fall by $5000 but the
variable costs rise to $4 per unit, the
minimum volume of sales required to
maintain the current profit will be:
Fixed cost + Target profit
Contribution to sales ratio
= $40000 + $18000
$12 - $4
= 7250 units
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Limitation of breakeven point
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Limitations of breakeven analysis

Breakeven analysis assumes that fixed cost,
variable costs and sales revenue behave in
linear manner. However, some overhead
costs may be stepped in nature. The
straight sales revenue line and total cost
line tent to curve beyond certain level of
production
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

It is assumed that all production is sold.
The breakeven chart does not take the
changes in stock level into account
Breakeven analysis can provide
information for small and relatively simple
companies that produce same product. It is
not useful for the companies producing
multiple products
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