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LOGOChapter
4CASH
FLOWANALYSIS4.1
Basic
Tax
StructureDomestic
AgreementsInternational
ContractsSummarycontents·4.1.1
Depreciation·4.1.2
Income
Taxes4.1 Basic
Tax
Structure4.1.1
DepreciationDefinition·In
literal
sense,
it
means
a
decrease
invalue.·In
economic
analysis,
it
is
treated
as
areplacement
cost.A
property
can
be
depreciatedif
it
satisfie·It
must
be
used
in
business
or
production
oincome.·It
must
have
a
life
longer
than
one
year.·It
must
be
something
that
wears
out,
decaysbecomes
obsolete
or
loses
value
fromnaturalcauses.For
Example:
equipment,
buildings,
and
other
kind
of
fixedassets.These
characteristics
are
most
appropriate
for
equipment;
however,
they
can
also
be
applied
tobuilding,
patents
and
copyrights.costscostsInvestment
in
property
such
as
building
,patentsCapitalized
and
copyrights
is
called
Capitalized
costs
.In
production
operations,
this
cost
will
includecosts
of
casing,
piping,
tank
batteries,
pumps,compressors,
buildings,
etc.
(tangible/intangiThe
costs
incurred
for
regular
maintenance,
upkeOperating
and
utilities
for
running
the
equipment,
includithe
labor
costs
are
considered
operating
costs.And
it
can
be
deducted
from
the
operating
revenuein
the
same
year
for
tax
purposescapitalized
costs
and
operating
costsExampleAlthough
the
distinction
between
the
capitalized
costsand
the
operating
costs
is
clear
in
most
instances,
insome
instances
the
distinction
is
difficult
to
achieve.
Agood
example
would
be
the
costs
of
drilling
a
well.These
costs
include:Costs
related
to
agreements
with
drilling
contractors.Surveys
related
to
location
of
a
well.Road
costs
and
dirt
work
related
to
well
location.Rig
transportation
and
set
up
costs.Fuel,
water,
drilling
mud
costs.Labor
costs
including
supervisors,
well
sitegeologists
and
testing
of
well.Stimulation
costs.Cementing
costs
(does
not
include
casing).Surface
damage
costs.Since
the
drilling
costs
are
incurred
before
the
actualproduction
begins,
they
cannotbe
considered
operatingcosts.On
the
other
hand,
the
costs
for
labor,
utilities,
drillingmud,
and
rig
rental
cannot
be
considered
tangible
costs.How
to
treat
these
costs
is
indeed
a
legislative
decision.Different
countries
have
different
rules
with
respect
tocategorizing
the
costs
of
drilling.ExplanationCost
Basis-B0·Cost
basis
represents
thecost
of
acquiring(purchase)
a
property.·This
is
the
total
cost
which
will
be
capitalizedover
the
property.·This
cost
includes
the
cost
of
the
property
aswell
as
all
the
other
incidental
(auxiliary)expenses
such
as
installation,
freight
(shippingcharge),
and
site
preparation.some
basic
definitionsBook
Value
(Bk)Book
value
is
cumulative
depreciation
subtractedfrom
the
cost
basis
of
the
property.
In
year
k
,
thebook
value
can
be
defined
as,(4.1)where
Dj
is
the
depreciation
in
year
j.
The
amountdepreciated
in
each
year
will
depend
upon
themethod
used.Salvage
ValueSalvage
valueis
the
price
obtained
from
the
saleof
property
at
the
endof
its
useful
life.Repair
CostsRepair
costs
are
costs
related
to
keeping
theproperty
in
an
ordinary
efficient
operatingcondition.Capitalized
CostsCapitalized
costs
related
to
the
existing
property
arecosts
related
to
alterations,
additions
or
improvementsthat
increase
property’s
useful
life
or
value
or
make
itadaptable
for
a
different
use.The
distinction
between
repair
costs
and
capitalizedcosts
for
an
existing
property
is
useful
because
repaircosts
can
be
deducted
as
operating
costs,
whereas,capitalized
costs
will
have
to
be
depreciated.
Thisdifference
can
have
significant
tax
consequences.Useful
LifeThe
time
over
which
property
is
kept
in
productive
use
ina
business.Tax
LifeThe
period
of
time
over
which
depreciation
is
calculatedto
offset
taxable
income.
This
period
is
usually
shorterthan
the
useful
life
of
the
property.
It
is
determined
by
thetax
code
of
a
particular
country
depending
on
the
type
ofproperty.Example
4.1
An
oil
company
ordered
a
new
submersiblepump
for
improving
production
from
an
old
well.
The
costof
the
pump
is
$20,000.
The
company
will
have
to
pay
7%sales
tax
on
the
pump.
In
addition,
shipping
costs
are$300,
and
the
installation
costs
are
$l,000.
What
is
thecost
basis
for
the
pump?SolutionIn
calculating
the
cost
basis,
any
cost
associated
withpurchase,
shipping,
installation
and
site
preparation
willhave
to
be
included.
Therefore,
the
cost
basis
for
thepump
is,Cost
of
Pump$20,000Sales
Tax
(7%)1,400Shipping
Cost
(freight)300Installation
cost1,000Cost
Basis$22,700AttentionIn
calculating
cost
basis,
it
is
critical
thatthe
costs
including
some
non-monetarytransactions
are
included.
One
such
exampleof
non-monetary
transaction
would
be
trade-in
benefit.·(1)Straight
Line
Depreciation-SLD·(2)Declining
Balance
Depreciation-DBD·(3)Sum
of
Years
Digits
Depreciation--SYDD·(4)Unit
of
ProductionDepreciation·(5)Declining
Balance
and
Straight
lineDepreciation·(6)Declining
Class
Account
DepreciationDifferent
Methods
of
Depreciation(1)Straight
Line
Depreciation-SLDStraight
line
depreciation
is
one
of
the
easiest
methods
ofestimating
the
depreciation.Mathematically,
the
depreciation
is
calculated
as.(4.2)where
Dk
is
the
depreciation
in
year
k
,
B0
is
the
cost
basis,S
is
the
salvage
value
at
the
end
of
tax
life
and
n
is
thenumber
of
years
of
tax
life.Alternately,
depreciation
can
also
be
calculated
as,(4.3)where
Bk-1
is
the
book
value
at
the
end
of
period
k-l.
Bothequations
would
give
the
same
result.
The
book
value
iscalculated
usingA
common
term,
S,
in
both
Eq.
4.2
and
Eq.
4.3
is
difficultto
estimate
at
the
beginning
of
taxable
life
for
manyproperties.
Many
tax
codes
simplify
the
calculations
byassuming
that
the
salvage
value
is
zero
at
the
end
of
taxlife.Example
4.2Consider
a
piece
of
equipment
purchasedfor
$5,000.
If
the
tax
life
is
five
years,
and
the
salvagevalue
is
zero,
calculate
the
depreciation
schedule
over
thefive
year
period.YearDepreciationDkBook
ValueBk5,00011,0004,00021,0003,00031,0002,00041,0001,00051,0000(2)Declining
Balance
Depreciation-DBDThe
amount
of
depreciation
in
each
year
is
a
certain
percentage
of
the
book
value
at
the
end
of
previousyear.*This
percentage
is
constant
throughout
the
tax
lifethe
property.*This
percentage
is
usually
defined
as
the
ratio
ofdeclining
balance
rate
to
the
tax
life.If
we
denote
this
percentage
change
in
fraction
as
R
,
wecan
calculate
the
depreciation
in
year
k
as,(4.4)where
the
book
value
at
the
end
of
year
k
can
becalculated
as.(4.5)Substituting
Eq.
4.5
in
Eq.
4.4,
we
can
calculate
thedepreciation
in
year
k
as,(4.6)where
B0
is
the
cost
basis.Thedeclining
balance
rate
canvary
between100%to
200%
(double
declining
balance=DDB)
;
the
most
common
value
being
200%.Example
4.3Using
the
same
information
as
in
Example4.2
and
using
the
double
declining
balance
methodestimate
the
depreciation
schedule.SolutionFor
year
one,
depreciation
is
calculated
as
(using
Eq.
4.6)D1
=
RB0where
R
is
200%/5
=
40%,
and
B0
=
$5,000.Substituting,D1=0.4×5,000=$2,000The
book
value
at
the
end
of
year
1
can
be
calculatedusing
Eq.
4.5,B1=B0(1-R)1=5,000(1-0.4)=$3,000Similarly,
for
year
2,D2=RB1=RB0(1-R)2-1=0.4*5,000(1-0.4)=$l,200D2=RBk-1=0.4(3,000)=$1,200Or,
using
Eq.
4.4,
.The
book
value
is,B2=
(5,000)(1
-
0.4)2
=
$l,800Calculations
can
be
repeated
for
other
years
as
well,
asshown
in
the
table
below:After
five
years,
the
total
amount
of
depreciation
allowedis
$4,61l
which
is
not
equal
to
the
cost
of
the
equipment.This
is
one
of
the
major
disadvantage
declining
balancemethod.
That
is,
the
cost
of
the
equipment
cannot
berecovered
fully
over
the
tax
life.
Only
at
very
large
timescan
the
total
cost
be
fully
recovered.YearBook
ValueDepreciation5,00013,0002,00021,8001,20031,08072046484325389259Total$4,611(3)Sum
of
Years
Digits
DepreciationSYDDThis
method
also
results
in
a
larger
depreciation
at
thebeginning
of
a
useful
life
than
the
straight
linedepreciation
method.
It
is
not
a
very
common
methodused
for
depreciation.
To
calculate
the
depreciation
usingthis
method,
we
first
need
to
know
the
sum
of
years
digits.This
sum
represents
the
sum
of
all
the
years
in
a
tax
life.For
example,
if
n
is
the
tax
life
of
a
property,
sum
iscalculated
as,sum
=
l+2
+3+...+n
(4.7)Alternately,
we
can
also
calculate
the
sum
as,(4.8)Depreciation
in
year
k
can
be
calculated
as,(4.9)We
can
write
Eq.
4.9
as,(4.10)Book
value
can
be
calculated
using
Eq.
4.
1.Example
4.4
Using
the
same
information
as
in
Example
4.2,
calculate
the
depreciation
schedule
using
the
sum
ofyears
digits
depletion.SolutionUsing
Eq.
4.10,
depreciation
in
year
1
can
be
calculated
as,For
year
two,kThe
book
value
after
year
two
is.Similar
calculations
can
be
done
for
other
years.Unlike
declining
balance
method,
sum
of
years
digitsmethod
allows
the
depreciation
of
the
entire
cost
of
anasset.YearDkBook
Value500011,6673,33321,3332,00031,0001,000466733353330Total
Depreciation$5,000(4)Unit
of
Production
DepreciationThis
method
of
estimating
the
depreciation
is
based
onthe
number
of
units
produced
by
an
equipment
ratherthan
the
life
of
the
equipment.
It
is
assumed
that
the
totalnumber
of
units
that
can
be
produced
from
the
equipmentis
known.
The
amount
of
depreciation
using
this
methodcan
be
calculated
as,(4.1l)where
(u)
is
the
number
of
units
produced
in
a
given
year,(U)
is
the
total
number
of
units
that
can
be
produced
fromthe
unit,
(C)
is
the
cost
of
the
equipment,
and
(S)
is
thesalvage
value.(5)
Declining
Balance
and
Straight
line
DepreciationTo
remove
the
major
disadvantage
of
the
declining
balancemethod,
i.e.,
not
being
able
to
recover
the
entire
cost
of
anasset;
at
the
same
time,
to
allow
for
the
rapid
depreciation
ascalculated
by
the
declining
balance
method,
a
combination
ofdeclining
balance
and
a
straight
line
method
is
used.This
method
allows
the
calculation
of
depreciation
using
boththe
declining
balance
and
the
straight
line
methods
andswitching
from
one
method
to
another
when
method
predictsa
higher
depreciation
than
the
other
method.Recall
that
straight
line
depreciation
can
be
calculated
as(4.3)and
the
declining
balance
depreciation
is
calculated
as,(4.4)For
each
year,
we
compute
the
depreciation
using
bothmethods
and
choose
the
value
which
is
higher.If (4.12),
we
select
the
declining
balanceMethod;Ifmethod.(4.13),
we
select
the
straight
lineIf
we
assume
that
the
salvage
value
is
zero,
we
cansimplify
Eq.
4.13
to
write,Eq.4.14
provides
a
condition
for
switching
to
a
straightline
method.
For
example,
if
n=
5,
and
R
=
0.4,
k
>
3.5
toswitch
to
a
straight
line
method.
That
is,
we
will
switch
inyear
4
to
a
straight
line
method.
The
following
exampleillustrates
the
technique.(4.14)Example
4.6Using
the
same
information
as
in
Example4.2,
calculate
the
depreciation
schedule
using
thecombination
(double
declining
and
straight
line)
method.Assume
double
declining
balance
(DDB).YearDepreciation(Declining
balance)Depreciation(Straight
Line)Book
ValueAt
The
EndSelectedDepreciation5,00012,0001,0003,0002,00021,2007501,8001,20037206001,080720443254054054052165400540(6)
Declining
Class
Account
DepreciationFor
equipment
which
is
assembled
from
variouscomponents,
it
is
difficult
to
depreciate
individualcomponents
separately.
An
example
would
be
a
pipelinenetwork
or
a
gas
processing
plant.
It
is
difficult
to
keeptrack
of
a
valve
or
a
flange
or
a
tee
in
a
pipeline
network;and
depreciate
it
individually.
To
minimize
this,accounting
complexity
another
method
commonly
usedfor
depreciation
is
the
declining
class
account
(DCA)depreciation.This
method
is
based
on
whole
investment
perpetualdeclining
class
account
(DCA)
schedule.
The
method
isrelatively
easy
to
use.
Assuming
that
the
average
tax
lifeof
the
equipment
is
known,
the
depreciable
amount
in
agiven
year
is
calculated
as,(4.15)where
Bk-l
is
the
book
value
at
the
end
of
previous
yearand
Ak
is
the
sum
of
capital
expenditures
during
year
k.Depreciation
in
year
k
is
then
calculated
as,(4.16)where
R
is
the
declining
balance
ratio.
This
equation
is
continued
to
be
used
so
long
as
the
equipment
is
used
fora
given
purpose.If
any
part
of
the
capital
equipment
is
disposed,
theincome
received
is
treated
as
a
taxable
income.4.l
.2
Income
TaxesTaxing
the
income
can
take
several
forms;
the
mostcommon
being
income
tax
which
is
levied
on
thedifference
between
the
gross
revenue
and
alloweddeductions
for
tax
purposes.It
is
based
on
the
value
of
real
estatePropertytaxsalestaxLuxurytaxEntertainmenttaxvalue
addedtaxOther
taxesIt
is
based
on
the
price
of
goodsIt
is
based
on
items
which
arenot
considered
necessitiesIt
is
based
on
entertainment
expensesIt
is
based
on
the
difference
in
a
valueof
a
good
as
it
passes
from
one
party
toanotherBasic
Principles
of
Tax
Laws·The
first
principle
about
the
income
taxis
thatit
is
assessed
based
on
thetaxable
income.·The
second
principle
common
to
mostof
the
income
tax
laws
is
that
the
ratesat
which
the
tax
applied
tends
to
beprogressive.In
most
economic
evaluations,
one
needstousemarginal
rate
for
calculations.
Marginal
tax
raterepresentsthe
tax
rate
applied
to
thelast
dollar
earin
the
taxable
income.Marginal
tax
rateFor
example,In
U.S.
the
tax
rate
is
15%
for
a
corporation
with
ataxable
income
less
than
$50,000;
the
rate
increase
to39%
for
taxable
income
exceeding
$200,000.If
the
corporation
has
earned
$30,000
last
year
andexpects
to
add
another
$10,000
in
taxable
income
witha
new
project,
it
is
reasonable
to
assume
a
marginaltax
rate
of
15%;
however,
if
the
corporation
earned$l,000,000
last
year
and
is
considering
a
new
projectwith
a
potential
additional
taxable
income
of
$500,000,it
is
better
to
use
39%
as
a
marginal
tax
rate
ineconomic
analysis.
Because,
that
is
the
income
taxrate
that
will
be
applied
to
any
additional
taxableincome.Tax
ComputationsTaxable
income
is
calculated
by
subtracting
the
allowabledeductions
from
gross
revenue.
In
mathematical
terms,taxable
income
=
gross
revenue
–
tax
deduction
(4.1Most
common
deductions
include
operating
costs,
depreciatioverhead
costs
and
other
related
expenses.
Therefore,
we
cawrite,taxable
income
=
gross
revenue
-
operating
costs-
related
expenses
-
depreciation
(4.1Once
the
taxable
income
is
calculated,
the
income
tax
iscalculated
by
using
the
applicable
marginal
tax
rate.
That
iincome
tax
=
taxable
income
×
tax
rate
(4.19)To
calculate
net
revenue,
we
need
to
subtract
the
actuexpenses
from
the
gross
revenue.
These
expenses
do
noinclude
depreciation
or
other
deductions
which
areonly
deducted
for
tax
purposes.Net
revenue
is
calculated
as,net
revenue
=
gross
revenue-operating
costs-
related
expenses-tax
(4.20)jIf
we
use
the
following
notation:
A
=
gross
revenue
in
yearO
=
operating
costs
in
year
jjD
=
depreciation
in
year
jjT
=
marginal
tax
rateE
=
other
related
expenses
yeajwe
can
write
taxable
income
as,
=
A
-O
-E
-Dj
j
j
jwe
can
write
the
income
tax
as,
=
T(A
-
O
-E
-D
)j
j
j
jand
we
can
write
the
equation
for
net
revenue
as,(4.2(4.2=
A
-O
-E
-
T(A
-
O
-E
-D
)j
j
j
j
j
j
jnet
revenue
=(l-
T)(
A
-O
-E
)+
TDj
j
j
j(4.23)Eq.
4.23
can
be
repeated
for
all
the
years
in
which
a
projectoperation.Example
4.8
A
company
wishes
to
buy
a
workstation
computerfor
$15,000.
With
the
use
of
this
machine,
the
company
can
sa$5,000
in
outside
computing
costs.
The
maintenance
agreemencalls
for
a
payment
of
$800
per
year
for
the
machine.
Assumethat
the
useful
life
of
the
machine
is
five
years.
Assume
furthat
a
straight
line
depreciation
is
allowed
over
a
five
yearIf
the
income
tax
rate
is
28%,
calculate
the
NPV
of
thisinvestment
for
the
MROR
of
15%.SolutionSample
calculation
for
year
1,
gross
revenue
(savings)
=
5,Using
Eq.
4.18,taxable
income
=
gross
revenue
-
operating
costs
-depreciation=
5,000
-
800-
3,000
=
$l,200Using
Eq.
4.19tax
=
taxable
income
×
tax
rate
=
l,200×0.28
=
$336Using
Eq.
4.20,net
revenue
=
gross
revenue
-
operating
costs
-
taxes=
5,000
-
800-
336
=
$3,864In
these
calculations,
we
assumed
a
straight
line
depreciatTherefore,The
following
table
lists
the
calculations
for
other
years.YearGrossIncomeTaxableIncomeTaxNetRevenue0-15,000-15,00015,0001,2003363,86425,0001,2003363,86435,0001,2003363,86445,0001,2003363,86455,0001,2003363,864We
are
assuming
that
all
the
income
is
collected
at
the
end
ofyear,Since
the
NPV
is
negative,
the
project
is
not
feasible.Alternately,
if
we
use
Eq.
4.23,
we
can
write
the
net
revenueequation
as,net
revenue
=(l-
T)(
Aj-Oj-Ej
)+
TDjSubstituting,
.=
(l
-
0.28)(5,000-
800)
+
0.28×3,000
=
$3,864Since
the
revenue
is
constant
each
year,
we
can
write,We
will
get
the
same
answer
as
before.Example
4.9A
gas
well
is
expected
to
produce
at
exponentialdecline
rate
based
on
the
adjacent
producing
wells.
Based
oninitial
testing,
the
following
production
profile
is
predicthe
next
five
years.
The
total
capitalized
cost
for
this
well$2,000,000.
The
operating
costs
per
year
are
$600,000
and
ar
expected
to
increase
at
a
rate
of
5%
per
year.
Assume
that
gas
sold
at
a
rate
of
$l.75/MSCF,
and
all
the
money
is
collected
aend
of
each
year.
Assume
that
the
local
tax
is
7%
of
the
gross
revenue.Assume
that
the
capitalized
cost
is
depreciated
over
a
five-yperiod
using
a
combination
method(double
declining
balance
and
straightline).
Assume
that
depletion
costsare
negligible.
If
the
income
taxIf
the
MROR
is
20%,is
this
investment
feasible?Production
ProfileYear1Production,MSCF1,561,51521,134,922rate
is
28%.Using
this
information,3calculate
the
ROR
for
this
investment.823,5314597,6885434,578SolutionThe
following
table
illustrates
the
results
over
a
five-yearSample
calculations
are
shown
below.*
Local
tax
can
be
treated
as
other
expenses
since
these
taxeassessed
based
on
the
gross
revenue,
and
not
taxable
income.YearProduction,GrossOperatingLocal*1MSCF1,561,515Revenue
($)2,732,651Costs
($)600,000Tax
($)191,28621,134,9221,986,114630,000139,0283823,5311,441,179661,500100,8834597,6881,045,954694,57573,2175434,578760,512729,30453,236Foryearone,gross
revenue
=
production
×
price
=
l,561,515×$l.75
=
$2,732,
651local
tax
=
gross
revenue×.07
=
2,732,651×.07
=
$191,286For
year
one,
Using
Eq.
4.4, depreciation
=
2/5
×
2,000,000=$800,00Using
Eq.
4.18,taxable
income
=
gross
revenue
-
operating
costs
-
local
tax
-
depreciatio=
2,732,651
-
600,000-
191.286
-
800,000
=
$l,141,365Using
Eq.
4.19,tax
=
taxable
income
x
tax
rate
=
1,141,365×0.28
=
$319,582Using
Eq.
4.20,net
revenue
=
revenue
-
operating
costs
-
local
tax
-
income
tax=
2,732,651
-
600,000
-
191,286
-319,582
=
$1,621,783YearDepreciationTaxable
IncomeTaxNet
Revenue($)($)($)($)1800,0001,141,365319,5821,621,7832480,000737,086206,3841,010,7023288,000390,796109,423569,3734216,00062,16217,405260,7575216,000-238,028-66,64844,620Note
that
for
the
last
year,
the
taxable
income
is
negative.result,
the
tax
is
also
negative.
Therefore,net
revenue
=
760,
512
-
729,304
-
53,236
-(-66,648)
=
$44,The
reason
we
use
negative
tax
is
because
of
the
assumption
tthis
is
one
of
several
projects
the
company
is
involved
in,
aa
result,
the
loss
in
this
project
will
result
in
a
reduction
in
other
ventures
and
thus
result
in
an
overall
lower
tax
pay
by
the
negative
amounts.
To
calculate
the
ROR,0
=
PV
–
PVcosts
benefitsBy
trial
and
error,
i
=
ROR
=
38.3%.
Since
ROR>MROR,
theproject
is
feasible.Effect
of
Depreciation
ScheduleAs
seen
in
the
previous
section,
depreciation
playsmajor
role
in
net
revenue
calculations.
In
this
sect
we
will
investigate
the
impact
of
depreciation
sche
on
the
after
tax
analysis
of
a
project.
Recall
Eq.
4.
which
states
that
the
net
revenue
is,=(l-
T)(
A
-O
-E
)+
TDj
j
jj(4.23
)That
is,
we
receive
an
"additional"
net
revenue
of
TDjas
a
reof
depreciation
deduction.
This
additional
revenue
is
colleover
the
life
of
the
project.
If
we
assume
that
the
tax
life
oasset
is
n
,
then
we
can
calculate
the
present
value
of
theadditional
future
revenues
as,(4.24)where
i
is
the
effective
interest
rate.
This
is
the
benefit
wreceive
as
a
result
of
the
capital
expenditure
B0Therefore,
after
tax
consideration,
the
net
cost
associatedthat
asset
is,(4.25)Obviously,smaller
the
net
cost,better
off(經(jīng)濟(jì)狀況好)
will
becorporation.This
net
cost
will
depend
on
the
depreciationschedule.Example
4.10A
new
water
injection
pump
will
bepurchased
for
$90,000.
It
can
be
depreciated
over
aseven
yearperiod.
If
the
marginal
tax
rate
is
34%,calculatethenet
cost
of
thepump
if
it
is
depreciateusing:
a)
straight
line
method,
b)
double
decliningbalance
method.
Assume
the
interest
rate
to
be
1
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