• Deferred income tax is a balance-sheet item that records taxes a company will pay—or recover—in the future because accounting rules (how companies prepare financial statements) and tax laws (how governments compute taxable income) treat the same items differently. These timing differences create amounts that do not affect current cash tax payments but will reverse and affect cash tax in later periods.
Key definitions
– Current tax (tax payable): the actual amount of income tax a company owes to tax authorities for the reporting period.
– Tax expense (income tax expense): the tax amount shown on the income statement based on accounting (book) income.
– Temporary difference: a difference between a company’s taxable income and its pre-tax book income that will reverse in later periods.
– Deferred tax asset (DTA): a future tax benefit (reduces future taxes) arising when a company has already paid more tax, or recognized deductions for tax purposes earlier than for book purposes.
– Deferred tax liability (DTL): a future tax obligation (increases future taxes) that arises when tax authorities allow deductions earlier than accounting does, or when taxable income is temporarily lower than book income.
Why deferred tax exists (brief explanation)
Financial accounting follows standards (in the U.S., Generally Accepted Accounting Principles, GAAP) that determine book income. Tax authorities (for example, the IRS) have their own rules to compute taxable income. When the two systems recognize revenue or expense at different times, a temporary difference appears. The company records tax expense based on book income but pays the tax required by the tax code now; the gap between those two amounts becomes a deferred tax asset or liability.
How deferred tax affects the balance sheet
– If a company expects to pay more tax later because taxable income has been artificially depressed today (e.g., tax depreciation is larger than book depreciation early on), it records a deferred tax liability.
– If a company has paid more tax now than its book tax expense (for example, tax rules disallow an expense now that accounting recognizes), it records a deferred tax asset.
– Companies typically show DTAs and DTLs as noncurrent on the balance sheet and are allowed to net amounts when appropriate. Management must also consider whether DTAs need a valuation allowance (a reserve) if it’s not likely they will be realized.
Common causes of temporary differences
– Depreciation and amortization methods that differ between tax rules and accounting standards.
– Allowances and reserves (bad-debt allowances, warranties) that are recognized in accounting before tax deductions are allowed.
– Gains or losses recognized at different times (for example, unrealized gains for book that are taxed on realization).
– Differences in revenue recognition timing.
Short checklist to identify and evaluate deferred tax items
1. Reconcile tax expense to taxes payable on the tax return.
2. Identify items where tax and book treatment differ temporarily (depreciation, accruals, reserves, etc.).
3. Determine whether the difference will increase future taxes (DTL) or reduce them (DTA).
4. Apply the enacted tax rate expected when the difference reverses.
5. Check whether DTAs need a valuation allowance (likelihood of realization).
6. Confirm presentation (usually noncurrent) and required disclosures in the notes.
Worked numeric example (simple, two-period illustration)
Assumptions
– Pre-tax book income before depreciation: 150,000 each year.
– Equipment cost: 100,000.
– Book depreciation (GAAP): straight-line over 5 years = 20,000 per year.
– Tax depreciation (accelerated): 40,000 in year 1, 20,000 in year 2, remaining later.
– Tax rate: 30%.
Year 1
– Book taxable base after book depreciation = 150,000 − 20,000 = 130,000.
– Tax expense (book) = 130,000 × 30% = 39,000.
– Taxable income under tax rules = 150,000 − 40,000 = 110,000.
– Current tax payable = 110,000 × 30% = 33,000.
– Deferred tax liability (DTL) recorded = tax expense − current tax payable = 39,000 − 33,000 = 6,000.
Interpretation: Because tax depreciation exceeded book depreciation in year 1, the company’s taxable income was lower than its book income, so it will