18. Deferred tax assets and liabilities

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(a) Recognised deferred tax assets and liabilities

Deferred tax assets and liabilities are attributable to the following items:

RUB million Assets
2012
Liabilities
2012
Net
2012
Assets
2011
Liabilities
2011
Net
2011
Property, plant and equipment 9 (3,990) (3,981) 5 (3,270) (3,265)
Other long-term assets 67 (41) 26 47 (219) (172)
Current assets 271 (315) (44) 220 (255) (35)
Liabilities 1,055 (1) 1,054 620 (56) 564
Tax loss carry-forwards 781 781 570 570
Provision for tax loss carry-forwards (781) (781) (438) (438)
Unrecognised deferred tax assets (28) (28) (74) (74)
Tax assets / (liabilities) 1,374 (4,347) (2,973) 950 (3,800) (2,850)
Set off of tax (1,374) 1,374 (950) 950
Net tax assets / (liabilities) (2,973) (2,973) (2,850) (2,850)

The unrecognised tax losses expire within eight years from the reporting date.

The aggregate amount of temporary differences associated with investment in subsidiaries at the reporting date is RUB 32,347 million (31 December 2011: RUB 18,970 million). The deferred tax liability for these temporary differences has not been recognised because the Parent can control the timing of reversal of the temporary difference and it is probable that temporary differences will not reverse in the foreseeable future.

The unrecognised temporary differences relating to investments in associates at the reporting date is RUB 5,167 million (31 December 2011: RUB 5,234 million).

(b) Movement in temporary differences during the year

2012 Recognised
in profit and loss
Recognised
in other
comprehensive
income
2011
Property, plant and equipment (3,981) (716) (3,265)
Other long-term assets 26 198 (172)
Current assets (44) (9) (35)
Liabilities 1,054 340 150 564
Tax loss carry-forwards 781 211 570
Provision for tax loss carry-forwards (781) (343) (438)
Unrecognised deferred tax assets (28) 46 (74)
Net tax assets / (liabilities) (2,973) (273) 150 (2,850)
2011 Recognised in
profit and loss
2010
Property, plant and equipment (3,265) (378) (2,887)
Other long-term assets (172) (74) (98)
Current assets (35) (183) 148
Liabilities 564 366 198
Tax loss carry-forwards 570 403 167
Provision for tax loss carry-forwards (438) (271) (167)
Unrecognised deferred tax assets (74) (13) (61)
Net tax assets / (liabilities) (2,850) (150) (2,700)
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