PACKAGING CORP OF AMERICA

Contractual Obligations

Our cash requirements greater than twelve months from contractual obligations and commitments include:

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Debt obligations and interest payments. See Note 10, Debt, of the Consolidated Financial Statements included in “Part II, Item 8. Financial Statements and Supplementary Data” of this Form 10-K for more information on our debt obligations and interest payments and the timing of expected future payments.

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Operating and finance leases. See Note 3, Leases, of the Consolidated Financial Statements included in “Part II, Item 8. Financial Statements and Supplementary Data” of this Form 10-K for more information on our lease obligations and the timing of expected future payments.

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Asset retirement obligations. See Note 13, Asset Retirement Obligations, of the Consolidated Financial Statements included in “Part II, Item 8. Financial Statements and Supplementary Data” of this Form 10-K for more information on our asset retirement obligation at the end of the period.

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Purchase commitments. Purchase commitments relate to various purchase agreements for items such as minimum amounts of energy and fiber purchases. See Note 19, Commitments, Guarantees, Indemnifications, and Legal Proceedings, of the Consolidated Financial Statements included in “Part II, Item 8. Financial Statements and Supplementary Data” of this Form 10-K for more information on our purchase commitments and the timing of expected future payments.

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Employee benefit obligations. See Note 12, Employee Benefits Plans and Other Postretirement Benefits, of the Consolidated Financial Statements included in “Part II, Item 8. Financial Statements and Supplementary Data” of this Form 10-K for more information on our employee benefit obligations and the timing of expected future benefit payments under our pension plans and postretirement plans.