Tax Base of Assets and Liabilities

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Tax base is the amount at which an asset or liability is valued for tax purposes.

Tax Base of Assets

The following are a few examples of calculating tax bases for various assets.

AssetCalculation of Tax Base
Depreciable EquipmentThe cost of the equipment: $1,000,000Depreciation is done using straight-line method at 10% per annum, i.e., $100,000 per year.
Depreciation allowed under income tax is 15%.
Carrying value after one year = 900,000 (1,000,000 – 100,000)
Tax base after one year = 850,000 (1,000,000 – 150,000)
Carrying amount is greater than tax base. Due to this difference, a deferred tax liability equal to 50,000 * tax rate is created.
Development costsA company capitalized $1,000,000 of development cost. $200,000 of this amount was amortized during the year.For tax purpose, upto 25% of the amount can be amortized.
Carrying value after one year = 800,000 (1,000,000 – 200,000)
Tax base after one year = 750,000 (1,000,000 – 250,000)
Research costsA company incurred $1,000,000 on research costs. The entire cost was expensed in the current year.The tax laws allow research cost to be expensed over a 5-year period.
The carrying amount = $0.
Tax base = 1,000,000 – (1,000,000/5) = $800,000
This leads to the creation of a deferred tax asset as taxable income is higher than earnings before tax.
 Accounts receivableThe company has a provision for doubtful debt = $100,000Accounts receivable after adjusting for provision = $1,000,000
Tax laws allow a 25% deduction for doubtful debt on gross receivables.
Accounts receivable before provision of doubtful debt = $1,000,000 + 100,000 = $1,100,000
Tax base = 1,100,000 * (25% of 1,100,000) = 82,5000
This leads to the creation of a deferred tax liability.

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