J. Income Tax

Effective Tax Rate

	Three Months Ended March 31						Six Months Ended March 31
	2018			2017			2018			2017
	(Dollars in millions)
(Provision) benefit for income taxes	$	7		$	1		$	(198	)	$	(17	)
Effective tax rate		4	%		(1	)%		(248	)%		11	%

For the three and six months ended March 31, 2018, the tax (provision) benefit included a net discrete tax benefit of $26 million and a net discrete tax expense of $162 million, respectively, of which net tax expenses of $4 million and $189 million, respectively, comprised the impact of the Act. The amounts for the three and six month periods also included a net tax benefit of $30 million associated with the Purification Solutions goodwill and long-lived assets impairment charges. For both the three and six months ended March 31, 2017, the tax provision included a net discrete tax benefit of $20 million, primarily associated with the generation of excess foreign tax credits upon repatriation of previously taxed foreign earnings.

Tax Reform

On December 22, 2017, the U.S. enacted significant changes to federal income tax law affecting the Company, including a permanent reduction of the U.S. corporate income tax rate from 35% to 21%, effective January 1, 2018. Cabot expects that these changes will positively impact the Company's future after-tax earnings in the U.S., primarily due to the lower federal statutory tax rate and the establishment of a full participation exemption regime for foreign earnings. In transitioning to this new full participation exemption regime for foreign earnings, Cabot is subject to a one-time tax for the deemed repatriation of certain foreign earnings. A discussion of certain provisions of the Act and the Company’s preliminary assessment of the impact of such provisions on its consolidated financial statements is set forth below.

Uncertain Impacts of the Act

The accounting standard for income taxes (“ASC 740”) required the Company to recognize the effect of the tax law changes under the Act in the first quarter of fiscal 2018. However, due to the potential uncertainty or diversity of views in accounting for the impact of the Act, the Securities and Exchange Commission staff issued Staff Accounting Bulletin 118 (“SAB 118”) to address the application of U.S. GAAP in situations where a registrant does not have the necessary information available, prepared, or analyzed (including computations) in reasonable detail to complete the accounting for certain income tax effects of the Act.

In particular, SAB 118 clarified that the impact of the Act must be accounted for and reported in one of three ways: (1) by reflecting the tax effects of the Act for which the accounting is complete; (2) by reporting provisional amounts for those specific income tax effects of the Act for which the accounting is incomplete but a reasonable estimate can be determined, with such provisional amounts (or adjustments to provisional amounts) identified in the measurement period, as defined therein, being included as an adjustment to tax expense or benefit from continuing operations in the period the amounts are determined; or (3) where the income tax effects cannot be reasonably estimated, no provisional amounts should be reported and the registrant should continue to apply ASC 740 based on the provisions of the tax laws that were in effect immediately prior to the enactment of the Act. The measurement period begins in the reporting period that includes the Act’s enactment date and ends when the accounting has been completed, but not beyond one year from the enactment date.

Due to various uncertainties as described below, the Company has not completed its accounting for certain tax impacts of the Act. However, as provided in SAB 118, reasonable estimates, including any adjustments to the estimates made during the first quarter of fiscal 2018, have been made and recorded as provisional amounts in its financial results for the second quarter of fiscal 2018. A discussion of the material impacts of tax law changes under the Act for which the accounting is incomplete follows:

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Revaluation of Deferred Tax Assets: Due to the Company’s September 30 fiscal year-end, the reduction in the corporate tax rate to 21% effective January 1, 2018 will apply on a pro-rata basis for fiscal 2018, resulting in a U.S. federal statutory tax rate of 24.53% for the fiscal year. The reduction requires the Company to revalue its deferred tax assets and liabilities to account for the future financial impact of these amounts.

As of March 31, 2018, the accounting for this item was incomplete. Additional information is necessary in order to complete the accounting for this item, including: (1) further analysis regarding the impact of the reduced rate on the reversal of deferred tax assets and liabilities for the full fiscal 2018 at the pro-rata rate, and (2) the true-up of deferred tax assets and liabilities upon the filing of the U.S. income tax return for fiscal 2017. However, the Company has recorded a total provisional tax expense of $17 million related to the impact of the rate change on deferred tax balances, of which $13 million was recorded in the first quarter of fiscal 2018 and $4 million was recorded in the second quarter of fiscal 2018. The additional provisional adjustment recorded in the second quarter was primarily associated with the Purification Solutions goodwill and long-lived assets impairment charges.

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Deemed Repatriation: In general, the Act provides that U.S. shareholders of a “specified foreign corporation”, as defined in the Act, must include in U.S. taxable income its pro-rata share of certain undistributed and previously untaxed post-1986 foreign earnings and profits (“E&P”). The amount of E&P taken into account is the amount determined either as of November 2, 2017 or December 31, 2017, whichever is greater. This inclusion is offset by a deduction that results in an effective U.S. federal income tax rate of either 15.5% or 8%. The 15.5% rate applies to the “aggregate cash position”, as defined in the Act, of the specified foreign corporations and the 8% rate applies to the extent that the income inclusion exceeds the aggregate cash position. The aggregate cash position is determined as the cash position either as of September 30, 2018, or the average of September 30, 2016 and September 30, 2017, whichever is greater. Finally, the U.S. cash tax impact of the deemed repatriation inclusion may be offset by the utilization of foreign tax credits, which are pro-rated to reflect the deduction described above.

As of March 31, 2018, the accounting for this item is incomplete. Significant additional information will need to be obtained and analyzed in order to complete the accounting for this item. This includes: (1) the determination of the full fiscal 2018 E&P and foreign tax credits of the specified foreign corporations; (2) the true-up of the pre-fiscal 2018 E&P and foreign tax credits of the specified foreign corporations upon the filing of the U.S. income tax return for fiscal 2017 (tax year 2016); (3) establishing the appropriate foreign exchange rate for the full fiscal year 2018 used to translate foreign taxes; (4) clarification of the state income tax impact of the repatriation, including guidance from states in which Cabot has a taxable presence on the extent to which the state will conform with the provisions of the Act, as well as determination of the apportionment of the Company’s income for the full fiscal year 2018; (5) uncertainty as to which of the alternative aggregate cash position measurement dates will apply to the Company; and (6) further guidance from the U.S. Treasury Department on the interpretation and application of the rules.

In the absence of such additional information, Cabot has made a reasonable estimate of the financial impact of this item. The Company recorded a provisional charge of $149 million during the first quarter of fiscal 2018 to the (Provision) benefit for income taxes for deemed repatriation. No adjustment has been made to this provisional amount for the second quarter of fiscal 2018. This amount is expected to be a fully non-cash charge due to the Company’s existing tax attributes.

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Deferred Tax Liability on Unremitted Earnings: In addition to the deemed repatriation of foreign earnings, going forward, the Act effectively establishes a participation exemption system of taxation that, in general, provides a 100% deduction for dividends from specified foreign corporations. However, the Company is still required to provide non-U.S. withholding taxes, as well as other potential tax impacts, on undistributed earnings of non-U.S. subsidiaries that it does not consider to be indefinitely reinvested.

As of March 31, 2018, the accounting for this item is incomplete. Additional information necessary to complete the accounting includes: (1) finalization of U.S. previously taxed income resulting from the deemed repatriation of foreign earnings; (2) further analysis of the amount of distributable reserves, including treatment thereof under local law, available in various non-U.S. subsidiaries; (3) clarification of the state income tax impact of unremitted earnings that are not indefinitely reinvested; and (4) evolving interpretations of the U.S. GAAP rules applicable to the Act. As a result of the Act, the Company has made certain changes to its indefinite reinvestment assertion and has made a reasonable estimate of the financial impact of this item. The Company recorded a provisional amount of $23 million during the first quarter of fiscal 2018 to its tax expense for this item. No adjustment has been made to this provisional amount for the second quarter of fiscal 2018.

The Company will continue to evaluate the impact of the Act on its business and consolidated financial statements and will make any further adjustments to its provisional amounts in subsequent reporting periods upon obtaining, preparing or analyzing additional information affecting the income tax effects initially reported as a provisional amount.

Accounting for the Global Intangible Low-Taxed Income Tax

Under the Act, Cabot may be subject to a tax on global intangible low-taxed income (“GILTI”) in future years. In general, GILTI is a 10.5% tax on foreign income in excess of a deemed return on tangible assets of foreign corporations. This tax is effective for taxable years beginning after December 31, 2017. The Company has not yet adopted an accounting policy with respect to whether (i) to recognize deferred taxes for temporary differences (including outside basis differences) expected to reverse as GILTI or (ii) to recognize these temporary differences as period costs if and when incurred.

Other Material Provisions of the Act Effective in Future Periods

The Act also contains a number of other provisions that may have a material financial impact on the Company in the future. These include base erosion anti-abuse tax, foreign derived intangible income and the interest expense limitation under Internal Revenue Code section 163(j). These tax law changes apply only to tax years beginning after December 31, 2017. Therefore, the Company has not and will not record any amounts related to these items in its fiscal 2018 financial results.

Uncertainties

Cabot and certain subsidiaries are under audit in a number of jurisdictions. In addition, certain statutes of limitations are scheduled to expire in the near future. It is reasonably possible that a further change in the unrecognized tax benefits may also occur within the next twelve months related to the settlement of one or more of these audits or the lapse of applicable statutes of limitations. However, an estimated range of the impact on the unrecognized tax benefits cannot be quantified at this time.

Cabot files U.S. federal and state and non-U.S. income tax returns in jurisdictions with varying statutes of limitations. The 2014 through 2015 tax years generally remain subject to examination by the United States Internal Revenue Service and various tax years from 2005 through 2015 remain subject to examination by the respective state tax authorities. In significant non-U.S. jurisdictions, various tax years from 2002 through 2016 remain subject to examination by their respective tax authorities. As of December 31, 2017, Cabot’s significant non-U.S. jurisdictions include Canada, China, France, Germany, Italy, Japan, and the Netherlands.

During the three and six months ended March 31, 2018, Cabot released uncertain tax positions of less than $1 million and $2 million, respectively, due to the expirations of statutes of limitations in various jurisdictions. During the three and six months ended March 31, 2017, Cabot released uncertain tax positions of $1 million and $3 million, respectively, due to the expirations of statutes of limitations in various jurisdictions.