NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)
Years ended December 31, 2005 and 2004 (in thousands of dollars, except per share amounts)

21. INCOME TAXES:

Income tax expense attributable to income differs from the amounts computed by applying the combined federal and provincial income tax rate of 35.52% (2004 – 35.54%) to pre-tax income from operations as a result of the following:


2005
2004

Income before income taxes
$ 156,955
$ 102,461

Computed expected tax expense
$  55,750
$  36,415
Non-deductible expenses
1,400
945
Share of affiliate loss
248
433
Deferred revenue not affecting tax
(3,385)
(3,692)
Impact of changes in substantively enacted income tax rates
(301)
Other
(110)
(130)

$  53,602
$  33,971


The income tax provisions for the years ended December 31, 2005 and 2004 are as follows:


2005
2004

Current tax expense
$ 79,624
$ 54,595
Future tax expense
(26,022)
(20,624)

$ 53,602
$ 33,971


The tax effects of temporary differences that give rise to significant portions of the future tax asset at December 31, 2005 and 2004 are presented below:


2005
2004

Non-capital loss carryforwards
$     1,434
$    1,048
Premises and equipment
5,660
5,279
Cumulative eligible capital
34,131
35,810
Financing costs
710
1,142
Deferred listing revenue
93,110
68,864
Other temporary differences
8,544
5,424

$ 143,589
$ 117,567

Future tax asset:
Current
$     4,571
$     5,694
Long-term
139,018
111,873

$ 143,589
$ 117,567