Under IFRS, when you revalue an asset upward, the gain sits on your balance sheet before any tax authority collects on it. The deferred tax on revaluation is the future tax bill you must record right away, so your equity doesn’t look larger than what would actually remain after tax if the gain were realized. You calculate it by multiplying the gap between the asset’s new carrying amount and its tax base by the tax rate that will apply when you recover that value.
Why the Liability Exists
The rules for assets and the rules for tax measure the same property differently. IAS 16 lets a company adopt a revaluation model for property, plant, and equipment, adjusting the carrying amount to reflect current fair value.1IFRS Foundation. IAS 16 Property, Plant and Equipment Tax authorities usually don’t follow. They keep the asset at original cost minus accumulated tax depreciation, and that figure — the tax base — stays put until the asset is sold or otherwise disposed of in a taxable transaction.
IAS 12 calls the resulting gap a taxable temporary difference. When the carrying amount of an asset exceeds its tax base, the economic benefits the entity will collect exceed what tax law allows as a deduction, and the difference creates a deferred tax liability.2IFRS Foundation. IAS 12 Income Taxes Buy a building for $1 million, revalue it to $1.5 million while the tax base sits at $800,000, and the $700,000 gap is the temporary difference that drives the deferred tax calculation.
How to Calculate the Deferred Tax Liability
The formula is simple: temporary difference multiplied by the applicable tax rate. If revaluation lifts the carrying amount $200,000 above the tax base and the rate is 25%, the deferred tax liability is $50,000. The revaluation surplus that lands in equity is therefore $150,000, not the full $200,000.
No cash moves. The liability sits on the balance sheet as a signal that a slice of the paper gain is effectively earmarked for the government. Net equity reflects what the company would actually retain if that gain were crystallized.
Choosing the Tax Rate
IAS 12 requires deferred tax to be measured using tax rates enacted or substantively enacted by the end of the reporting period.3IFRS Foundation. IAS 12 Income Taxes Substantively enacted means the legislation has cleared enough of the process that adoption is virtually certain. If a rate change is on that footing before the balance sheet date, use the new rate now.
The rate also depends on how you expect to recover the asset’s value. Many jurisdictions tax capital gains on disposal differently from income earned through ongoing use. IAS 12 requires the measurement to reflect the tax consequences of the manner in which the entity expects to recover the carrying amount.4IFRS Foundation. IAS 12 Basis for Conclusions – Income Taxes Planning to sell a building in a jurisdiction that taxes capital gains at a lower rate than ordinary income? Use the capital gains rate. Planning to run the building until it’s fully depreciated? Use the ordinary corporate rate.
For investment property carried at fair value, IAS 12 adds a rebuttable presumption that the carrying amount will be recovered through sale rather than use. The presumption holds unless the property is depreciable and held within a business model that consumes its economic benefits over time. Most investment property therefore uses the capital gains rate for deferred tax unless the entity can demonstrate a use-based recovery model.
Operating across multiple tax jurisdictions adds a layer. The calculation has to incorporate national and local tax rates, and where local taxes are deductible against the national tax, the effective combined rate (net of the deduction) is what you use.
Where the Entries Appear
This is the detail that trips people up. When a revaluation surplus is recognized in other comprehensive income under IAS 16, the related deferred tax also has to be recognized in OCI, not in profit or loss.5IFRS Foundation. IAS 12 Income Taxes – Illustrative Examples IAS 12, paragraph 61A, sets out the matching principle: the tax effect follows the underlying item.
A single revaluation therefore touches three places on the balance sheet and one line in the statement of comprehensive income:
- Non-current assets rise by the full revaluation amount.
- Equity, through the revaluation surplus line, rises by the revaluation amount minus the deferred tax.
- Non-current liabilities pick up a new or increased deferred tax liability.
- Other comprehensive income shows the net revaluation gain, after deferred tax.
Routing the tax through OCI rather than profit or loss keeps the tax effect from distorting reported operating performance. Investors reading net profit won’t see a tax charge for a gain that never passed through the income statement.
How the Liability Changes Over Time
Reversal Through Depreciation
After revaluation, book depreciation is calculated on the new, higher carrying amount, while tax depreciation continues from the original tax base. Each year the book charge exceeds the tax allowance, the temporary difference narrows, and part of the deferred tax liability reverses.1IFRS Foundation. IAS 16 Property, Plant and Equipment IAS 16 permits an annual transfer from revaluation surplus to retained earnings equal to the difference between depreciation on the revalued amount and depreciation on original cost. Those transfers don’t pass through profit or loss. Absent further revaluations, the surplus and the associated deferred tax liability unwind to zero over the asset’s remaining useful life.
Later Revaluations
Deferred tax balances aren’t set-and-forget. Every revaluation changes the temporary difference and forces a recalculation. A drop in market value pulls the carrying amount closer to (or below) the tax base and reduces the liability; a further rise increases it. A downward revaluation that reverses an earlier upward one is recognized in OCI to the extent of the remaining surplus, and the related deferred tax follows the same path.
Disposal
When you finally sell the asset, the temporary difference becomes a real taxable gain. You derecognize the deferred tax liability and replace it with a current tax liability based on the actual sale price and the tax base at that date. Any remaining balance in the revaluation surplus is typically transferred straight to retained earnings, since the gain is realized and the tax settled.1IFRS Foundation. IAS 16 Property, Plant and Equipment
A Boundary for US GAAP Filers
This entire topic sits inside IFRS. Under US GAAP, companies cannot revalue fixed assets upward to fair value in normal operations. ASC 360 governs long-lived assets and uses fair value only when recognizing impairment losses. There is no US GAAP equivalent of the IAS 16 revaluation model, so a US-reporting company won’t book a revaluation surplus or its associated deferred tax on its own existing assets.
The exception is business combinations. ASC 805 requires the acquirer to measure the target’s identifiable assets and liabilities at fair value. That step-up from historical cost to fair value creates temporary differences and produces deferred tax liabilities on the opening balance sheet, with an offsetting adjustment to goodwill. The mechanics look like a revaluation, but they arise only from the acquisition.
Common Pitfalls
The most frequent error is picking the wrong tax rate. Defaulting to the headline corporate rate without checking how the value will be recovered can swing the liability dramatically. In a jurisdiction where capital gains are taxed at 10% and ordinary income at 25%, that difference is the calculation.
The second is failing to update balances when tax rates change. New legislation forces a remeasurement of every deferred tax balance tied to a revalued asset. The adjustment goes through OCI to the extent it relates to a revaluation surplus already sitting there.2IFRS Foundation. IAS 12 Income Taxes
The third is reading about deferred tax on revaluation in international accounting material and assuming it applies to a US GAAP filer. Outside of accounting for an acquisition, it doesn’t, and there should be no revaluation surplus or associated deferred tax liability on existing assets in those statements.