An asset that may be used to reduce any subsequent period's income tax expense. Deferred tax assets can arise due to net loss carry-overs, which are only recorded as assets if it is deemed more likely than not that the asset will be used in future fiscal periods.
- 1 Temporary differences
- 2 Timing differences
- 3 Justification for deferred tax accounting
- 4 Examples
- 5 Deferred tax in modern accounting standards
- 6 Derecognition of deferred tax assets and liabilities
- 7 See also
- 8 Notes
- 9 External links
Temporary differences 
Temporary differences are differences between the carrying amount of an asset or liability recognized in the statements of financial position and the amount attributed to that asset or liability for tax; or
- deductible temporary differences, which are temporary differences that will result in deductible amounts in determining taxable profit (tax loss) of future periods when the carrying amount of the asset or liability is recovered or settled.
The basic principle of accounting for deferred tax under a temporary difference approach can be illustrated using a common example in which a company has fixed assets which qualify for tax depreciation.
The following example assumes that a company purchases an asset for $1,000 which is depreciated for accounting purposes on a straight-line basis of five years of $200/year. The company claims tax depreciation of 25% per year. The applicable rate of corporate income tax is assumed to be 35%. And then subtract the net value.
|Purchase||Year 1||Year 2||Year 3||Year 4|
|Taxable/(deductible) temporary difference||$0||$50||$37||$(22)||$(116)|
|Deferred tax liability/(asset) at 35%||$0||$18||$13||$(8)||$(41)|
As the tax value, or tax base, is lower than the accounting value, or book value, in years 1 and 2, the company should recognize a deferred tax liability. This also reflects the fact that the company has claimed tax depreciation in excess of the expense for accounting depreciation recorded in its accounts, whereas in the future the company should claim less tax depreciation in total than accounting depreciation in its accounts.
In years 3 and 4, the tax value exceeds the accounting value, therefore the company should recognise a deferred tax asset (subject to it having sufficient forecast profits so that it is able to utilise future tax deductions). This reflects the fact that the company expects to be able to claim tax depreciation in the future in excess of accounting depreciation.
In many cases the deferred tax outcome will be similar for a temporary difference or timing difference approach. However, differences can arise such as in relation to revaluation of fixed assets qualifying for tax depreciation, which gives rise to a deferred tax asset under a balance sheet approach, but in general should have no impact under a timing difference approach.
Justification for deferred tax accounting
Deferred tax is relevant to the matching principle.
Deferred tax liabilities
Deferred tax liabilities generally arise where tax relief is provided in advance of an accounting expense, or income is accrued but not taxed until received. Examples of such situations include:
- a company claims tax depreciation at an accelerated rate relative to accounting depreciation
- a company makes pension contributions for which tax relief is provided on a paid basis, whereas accounting entries are determined in accordance with actuarial valuations
Deferred tax assets
Deferred tax assets generally arise where tax relief is provided after an expense is deducted for accounting purposes.Examples of such situations include:
- a company may accrue an accounting expense in relation to a provision such as bad debts, but tax relief may not be obtained until the provision is utilized
- a company may incur tax losses and be able to "carry forward" losses to reduce taxable income in future years..
An asset on a company's balance sheet that may be used to reduce any subsequent period's income tax expense. Deferred tax assets can arise due to net loss carryovers, which are only recorded as assets if it is deemed more likely than not that the asset will
Deferred tax in modern accounting standards
Modern accounting standards typically require that a company provides for deferred tax in accordance with either the temporary difference or timing difference approach. Where a deferred tax liability or asset is recognised, the liability or asset should reduce over time (subject to new differences arising) as the temporary or timing difference reverses.
Under International Financial Reporting Standards, deferred tax should be accounted for using the principles in IAS 12: Income Taxes, which is similar (but not identical) to SFAS 109 under US GAAP. Both these accounting standards require a temporary difference approach.
Other accounting standards which deal with deferred tax include:
- UK GAAP - Financial Reporting Standard 19: Deferred Tax (timing difference approach)
- Mexican GAAP or PCGA - Boletín D-4, el impuesto sobre la renta diferido
- Canadian GAAP - CICA Section 3465
- Russian PBU 18 (2002) Accounting for profit tax (timing difference approach)
Derecognition of deferred tax assets and liabilities
Management has an obligation to accurately report the true state of the company, and to make judgements and estimations where necessary. In the context of tax assets and liabilities, there must be a reasonable likelihood that the tax difference may be realised in future years.
For example, a tax asset may appear on the company's accounts due to losses in previous years (if carry-forward of tax losses is allowed). In this case a deferred tax asset should be recognised if and only if the management considered that there will be sufficient future taxable profit to utilise the tax loss. If it becomes clear that the company does not expect to make profits in future years, the value of the tax asset has been impaired: in the estimation of management, the likelihood that this tax loss can be utilised in the future has significantly fallen.
In cases where the carrying value of tax assets or liabilities has changed, the company may need to do a write down, and in certain cases involving in particular a fundamental error, a restatement of its financial results from previous years. Such write-downs may involve either significant income or expenditure being recorded in the company's profit and loss for the financial year in which the write-down takes place.
- IAS 12.5
- IAS 12.34
- Summary of International Accounting Standard 12: Income Taxes - by the International Accounting Standards Board
- Summary of Financial Accounting Standard 109: Income Taxes - US Financial Accounting Standard
- Financial Reporting Standard 19: Deferred Tax - UK Financial Reporting Standard
- Deftax - Commercial Deferred Tax Software