For trust units held in non-taxable accounts such as Registered Retirement Savings Plans (RRSP), Registered Retirement Income Funds (RRIF), or Deferred Profit Sharing Plans (DPSP), income earned on the trust units is generally not subject to taxation during the year. The amount of capital and any earnings in the plan are typically taxed only on withdrawal from the plan.

Units held outside an RRSP, RRIF or DPSP

Unitholders who hold trust units outside a RRSP, RRIF or DPSP and received one or more cash distributions during the calendar year will be issued a T3 Summary Form indicating the portion of cash distributions to be reported as taxable "Other Income" or “Eligible Dividends” and the portion which is a return of capital. T3 slips are mailed in the month of March. Unitholders will receive the T3 slip from their brokerage firm if the units are registered in street form and directly from Computershare Trust Company of Canada, the Trust’s registrar and transfer agent, if the Units are registered in the Unitholder’s name.

Adjusted Cost Base ("ACB") Reduction

ACB is used in calculating capital gains or losses in respect of trust units held as capital property by a Unitholder on the disposition of the Units. A Unitholder must generally average the cost of all Units to determine ACB. Unitholders are required to reduce the ACB of their Units by the amount of any distributions received as returns of capital (i.e. the tax-deferred portion of distributions received).

Capital gains from the disposition of Units will be equal to proceeds of the sale of the Units less the ACB of the Units and any reasonable costs of disposition. Additionally, should a taxpayer's ACB be reduced to below zero during a taxation year, an immediate disposition is deemed to have occurred and the negative amount is deemed to be a capital gain. The ACB is then reset to zero. Capital gains are reported by a Unitholder on schedule 3 of the T1 Income Tax Return.

Example:

An investor purchased a unit of the Trust for $50.00. During the time the investor held the unit, the  Trust paid distributions totalling $5.00. These distributions were comprised of $4.90 taxable income and $0.10 tax-deferred return of capital. The $4.90 taxable portion is taxable as other income in the year it was received whereas the $0.10 tax-deferred return of capital would not be taxable in that year. This amount reduced the ACB of the trust unit to $49.90.

If the investor then sold the Unit for $52.00, a capital gain of $2.10 would result ($52.00 -$49.90).

The above information is not intended to be, and should not be construed to be, legal or tax advice to any Unitholder. Unitholders should obtain independent advice regarding the income tax consequences of their investment.

U.S. and other Non-resident Tax Information

Unitholders who are non-residents of Canada for Canadian income tax purposes are encouraged to seek advice from a qualified tax advisor in your country of residence for the tax treatment of distributions. Distributions payable to non-residents of Canada are normally subject to a withholding tax of 25% as prescribed by the Income Tax Act of Canada. However, the withholding tax for residents of the United States is prescribed at 15% in accordance with a reciprocal tax treaty between Canada and the United States. U.S. taxpayers may be eligible for a foreign tax credit with respect to the Canadian withholding taxes paid. Other jurisdictions may also have reciprocal tax treaties that would reduce the withholding tax rate.

As Canadian Oil Sands Trust has not made an election to be treated as a partnership for U.S. tax purposes, we believe we are considered a corporation for U.S. tax purposes with a portion of the distributions paid by the Trust qualifying as dividends for U.S. tax purposes. In the instance of a U.S. Unitholder, the taxable portion of the distribution for U.S. tax purposes is determined by the Trust based upon current and accumulated earnings determined in accordance with U.S. tax law. Information detailing distributions paid and the taxable portion for U.S. purposes is posted on our Web site after the end of each year.

The non-taxable portion of the cash distribution is subject to a withholding tax of 15% but treated as a reduction of cost base for purposes of computing gains or losses on disposition of a Unit. Once the full amount of the cost base has been recovered, any additional non-taxable distributions should generally be reported as capital gains.

For U.S. residents, the income tax laws of the United States apply.

A summary of the distributions paid per Unit, the per cent taxable as Ordinary Income and the per cent taxable as Return of Capital or Capital Gain is available at U.S. Summary of Distributions.

The above information is not intended to be, and should not be construed to be, legal or tax advice to any Unitholder. Unitholders should obtain independent advice regarding the income tax consequences of their investment.

Canadian Federal Tax considerations for DRIP participants

The following information applies to Unitholders who participate in Canadian Oil Sands Trust's premium distribution, distribution reinvestment and optional unit purchase plan (“DRIP”).

Unitholders must consider the tax consequences of their participation in the DRIP. Information on the tax consequences is provided below.

Electing distribution reinvestment option

Where Participants elect to accumulate additional Units under the distribution reinvestment plan, the Participants reinvest their distributions in additional Units at 95% of the Average Market Price (as fully described in Canadian Oil Sands Trust's DRIP).

The Canada Revenue Agency (the "CRA") generally takes the position that under a DRIP, where the fair market value of the Units acquired exceeds the purchase price, the difference is a benefit and must be included in the Participant's income for tax purposes. The cost of the Units acquired under the DRIP is the amount reinvested plus the amount of the benefit. The units acquired under the DRIP must be averaged with the cost of all other Units the Participant holds for the purpose of determining the adjusted cost base of all the Participant's Units. Capital gains or losses arising on a disposition of the Participant's Units will be measured by reference to the adjusted cost base of all the Participant's Units.

Electing the premium distribution option (available only to Canadian resident Unitholders)

Where Participants elect to receive the Premium Distribution under the DRIP, the Agent will pre-sell, through the Plan Broker the number of Units to be purchased through the DRIP and such Participants, subject to proration, will receive a Premium Distribution in an amount up to 102% of the distribution that such Participants would have otherwise been entitled to receive on that distribution date (as fully described in Canadian Oil Sands Trust's DRIP).

Under the current assessing policies of the CRA, a Participant in the Premium Distribution is required to include in computing income any benefit and must also account for any gain or loss on the units sold on his or her behalf through the Premium Distribution DRIP.

The benefit is equal to the amount by which the closing price of Units acquired under the premium DRIP exceeds the cost of such Units. The benefit enjoyed pursuant to the participation in the DRIP may not be reported by the Trust on a Unitholder's T-3; however, a Participant will be required to report such benefit when preparing his or her tax return for the year in which the Units were acquired.

In addition to including the Benefit in income the Participant is also required to compute the profit (or loss) from the sale of the Units. However, as the amount of benefit is added to the cost of the units sold, the cost will generally equal the proceeds and no further gain or loss will result.

For example for a holder with 10,000 units the net effect of the sale of Premium DRIP on income account would be:

Although a Participant may hold existing Units as capital property, Units sold pursuant to the Premium Distribution option of the DRIP will generally constitute inventory. In circumstances where a Unitholder is considered to hold the Units acquired under the Premium DRIP as capital property, the calculations required are more complex as the holder must average the cost of the units acquired with the cost of all other units held. Unitholders should consult their own tax advisors with respect to such calculations.

The above information is not intended to be, and should not be construed to be, legal or tax advice to any Unitholder. Unitholders should obtain independent advice regarding the income tax consequences of their investment.

For the Average Market Price, Discounted Price and Closing Price for each distribution payment, please see the table below.