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U.S. Tax Information

U.S. Income Tax Information

The following information is being provided to assist U.S. individual unitholders of ARC Energy Trust (“ARC”) in reporting distributions received from ARC during 2006 on their Internal Revenue Service ("IRS") Form 1040, “U.S. Individual Income Tax Return” ("Form 1040").

This summary is of a general nature only and is not intended to be legal or tax advice to any particular holder or potential holder of ARC trust units. Holders or potential holders of ARC trust units should consult their own legal and tax advisors as to their particular tax consequences of holding ARC trust units.

Qualified Dividends

In consultation with its U.S. tax advisors, ARC believes that its trust units should be properly classified as equity in a corporation, rather than debt, and that dividends paid to individual U.S. unitholders should be “qualified dividends” for U.S. federal income tax purposes. As such, the portion of the distributions made during 2007 that are considered dividends for U.S. federal income tax purposes should qualify for the reduced rate of tax applicable to long-term capital gains. However, the individual taxpayer’s situation must be considered before making this determination.

Trust Units Held Outside a Qualified Retirement Plan

With respect to cash distributions paid during the year to U.S. individual unitholders, 1.76 percent should be reported as a return of capital (to the extent of the unitholder’s U.S. tax basis in their respective units) and 98.24 percent should be reported as “qualified dividends”. The table below summarizes the distributions paid by ARC in 2007.

The portion of the distributions treated as "qualified dividends” should be reported on Line 9b of Form 1040, unless the fact situation of the U.S. individual unitholders determines otherwise. Commentary on page 19 of the Form 1040 Instruction Booklet for 2007 with respect to "qualified dividends" provides examples of individual situations where the dividends would not be "qualified dividends". Where, due to individual situations, the dividends are not "qualified dividends", the amount should be reported on Schedule B – Part II – Ordinary Dividends and Line 9a of Form 1040.

For U.S. federal income tax purposes, in reporting a return of capital with respect to distributions received, U.S. unitholders are required to reduce the cost base of their trust units by the total amount of distributions received that represent a return of capital. This amount is non-taxable if it is a return of cost base in the trust units. If the full amount of the cost base has been recovered, any further return of capital distributions should be reported as capital gains.

U.S. unitholders are encouraged to utilize the Qualified Dividends and Capital Gain Tax Worksheet of Form 1040 to determine the amount of tax that may be otherwise applicable.

The full amount of the distribution paid to a non-resident of Canada is subject to a minimum 15 percent Canadian withholding tax that is withheld prior to any payments being distributed to unitholders. Where trust units are held outside a qualified retirement account, the full amount of all withholding tax should be creditable, subject to numerous limitations, for U.S. tax purposes in the year in which the withholding taxes are withheld. Where trust units are held in qualified retirement account, the same withholding taxes apply but the amount is not creditable for U.S. tax purposes.

The amount of Canadian tax withheld should be reported on Form 1116, "Foreign Tax Credit (Individual, Estate, or Trust)". Information regarding the amount of Canadian tax withheld in 2007 should be determined from your own records and is not available from ARC. Amounts over withheld, if any, from Canada should be claimed as a refund from the Canada Revenue Agency no later than two years after the calendar year in which the payment was paid.

Investors should report their dividend income and capital gain (if any), and make adjustments to their tax basis in ARC’s units, in accordance with this information and subject to advice from their tax advisors. U.S. individual unitholders who hold their ARC trust units through a stockbroker or other intermediary should receive tax reporting information from their stockbroker or other intermediary. We expect that the stockbroker or other intermediary will issue a Form 1099–DIV, “Dividends and Distributions” or a substitute form developed by the stockbroker or other intermediary. ARC is not required to furnish such unitholders with Form 1099-DIV. Information on the Forms 1099-DIV issued by the brokers or other intermediaries may not accurately reflect the information in this press release for a variety of reasons. Investors should consult their brokers and tax advisors to ensure that the information presented here is accurately reflected on their tax returns. Brokers and/or intermediaries may or may not be required to issue amended Forms 1099-DIV.

Trust Units Held Within a Qualified Retirement Plan

No amounts are required to be reported on a Form 1040 where ARC trust units are held within a qualified retirement plan.

Summary

Record Date Distribution Payment Date Dist. Paid CDN$ Exchange Rate Dist. Paid US$ Taxable Qualified Dividend US$ Non-taxable Return of Capital US$
Dec 31, 2006 Jan 15, 2007 $0.20 0.856100 0.171220 0.168207 0.003013
Jan 31, 2007 Feb 15, 2007 $0.20 0.859200 0.171840 0.168816 0.003024
Feb 28, 2007 Mar 15, 2007 $0.20 0.850500 0.170100 0.167106 0.002994
Mar 31, 2007 Apr 16, 2007 $0.20 0.884200 0.176840 0.173728 0.003112
Apr 30, 2007 May 15, 2007 $0.20 0.911000 0.182200 0.178993 0.003207
Mar 31, 2007 Apr 16, 2007 $0.20 0.884200 0.176840 0.173728 0.003112
Apr 30, 2007 May 15, 2007 $0.20 0.911000 0.182200 0.178993 0.003207
May 31, 2007 Jun 15, 2007 $0.20 0.936400 0.187280 0.183984 0.003296
Jun 30, 2007 Jul 16, 2007 $0.20 0.958800 0.191760 0.188385 0.003375
Jul 31, 2007 Aug 15, 2007 $0.20 0.930600 0.186120 0.182844 0.003276
Aug 31, 2007 Sep 17, 2007 $0.20 0.970100 0.194020 0.190605 0.003415
Sep 30, 2007 Oct 15, 2007 $0.20 1.024800 0.204960 0.201353 0.003607
Oct 31, 2007 Nov 15, 2007 $0.20 1.019600 0.203920 0.200331 0.003589
Nov 30, 2007 Dec 17, 2007 $0.20 0.992800 0.198560 0.195065 0.003495
Total per Unit   $2.40   $2.238820 $2.199417 $0.039403