Materiality and Audit Risk
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What is materiality?
Materiality refers to quantative and qualitative omissions
or misstatements that make it probable the judgement of a reasonable
person would have been changed or influenced.
These omissions or misstatements can be individually or in the
aggregate material.
Accountants and auditors are concerned about this. Remember what will
be in your reports:
- Review report: "Based on my review, I am not aware of any
material modifications that should be made...."
- Audit report: "In my opinion, the financial statements
referred to above present fairly, in all material
respects, the financial position of ....."
Materiality needs to be considered at two times, in
- planning the audit and designing audit procedures.
- evaluating whether financial statements taken as a whole
are presented fairly, in all material respects,
is accordance with GAAP.
Materiality and Planning the Audit
Financial Statement Level - The planning starts here!
- Begin by making a preliminary estimate about materiality levels
for balance sheet and income statement. See pages 226 - 227
for some rules of thumb.
- Select the smallest estimate for purposes of
developing your audit plan. If
- $100,000 would materially misstate income, and
- $200,000 would materially misstate total assets
Your audit plan should be designed to detect omissions
or misstatements, that individually or in the aggregate,
equal $100,000.
Account Balance Level - Allocate materiality to each account.
Remember that financial statement audits are done on an account by
account basis. Therefore, you need to estimate how much error
you can tolerate in each account before you conclude that the account
is materially misstated.
Two ways to allocate materiality. See page 229.
- In proportion to the account's balance. This is the
more mechanical approach.
- In proportion to how difficult it is to audit the
account. This is a more judgemental approach.
Materiality and Evaluation of Audit Findings
- The auditor aggregates errors the client has not corrected. These
include
- known misstatements - errors that you actually found.
- likely misstatements - errors that a sampling program indicates
have a high probability of exisiting.
- The auditor determines if these errors materially misstate any
- account balance,
- financial statement subtotal, or
- financial statement total.
- For an example, see page 730.
Audit Risk
Audit risk is the risk that an auditor will fail to modify his or her
opinion when the financial statements contain a material misstatement.
For each line in the financial statements, auditors want audit risk to
be low for each assertion.
How to get low audit risk.
Auditor's must evaluate the three components of audit risk. The
combination of these three components determines whether or not there
is low audit risk.
- Inherent risk - How susceptiable is an assertion to
a material misstatement, assuming no controls?
- High inherent risk if account is prone
to misstatement.
- Low inherent risk if account is not
likely to contain a misstatement.
- Inherent risk is based on factors
- peculiar to a specific assertion. EG,
Accounts receivable must be shown a
realizable value. This
is an accounting estimate. Valuation is
very difficult for A/R.
- that affect many accounts. EG, the company
is having financial problems. They may
try to overstate sales (occurrence) and
understate expenses (completeness).
 
- Control Risk - How likely is it that a material misstatement
will not be detected and corrected by controls relevant
to an assertion?
- High Control Risk if
- Controls for a particular assertion are not
operating effectively, or
- The auditors decides that it would not be
efficient to test the controls.
- Low Control Risk if
tests of controls show the controls to be
effective.
 
- Detection Risk - How likely is it that the auditor will
not detect a meterial misstatement in an assertion?
- High detection risk - It is very likely that the
auditor will fail to detect a material error. In other
words, the auditor reduces substantive
testing.
- Low detection risk - There is very little chance that
the auditor will fail to detect a material error.
In other words, you do extensive substantive testing.
AR = IR * CR * DR
- The auditor knows that audit risk must be low for each assertion.
- Next, the auditor evaluates the assertion's inherent risk.
- Hi if prone to misstatement.
- Lo if not prone.
- Third, the auditor evaluates control risk.
- Hi if controls are poor or you decide not to test controls.
- Lo if your testing indicates that controls are OK.
- Finally, the auditor sets detection risk.
- Hi when assertion not likely to be materially misstated or
controls are good. This means reduced substantive testing.
- Lo when assertion is likely to be misstated and you are not
relying on controls. This means extensive substantive testing.
- Since detection risk is the last item to be figured out, the audit
risk equation can be re-written as:
DR = AR
---------
IR * CR
- All substantive testing approach. - Auditor tests the assertion
on or after the balance sheet date. Generally, IR and CR are Hi,
while DR is low. For example,
- Cash can
be tested with 100% substantive testing by confirming the
balance with the bank and reviewing the year-end bank reconciliation.
- Depreciation expense can be tested with 100% substantive testing
by recomputing depreciation for each asset.
- Dividends paid can be tested with 100% substantive testing
by multiplying dividend amount
per share * times number of shares outstanding.
- Rely on controls and reduce substantive testing approach. Generally,
IR and CR are lo to moderate, and DR is moderate to hi. For example,
- Confirm accounts receivable 2 months before balance sheet.
Rely on controls over processing of accounts receivable
to reduce risk that error will not occur during the
final two months of the year. Rely on analytical
procedures to detect unusual situations that might
arise.
- Confirm accounts receivable as of balance sheet date. However,
auditor sends out fewer confirmations because internal
controls over accounts receivable are good.