Exhibit 99.1

UNITED STATES BANKRUPTCY COURT

DISTRICT OF DELAWARE

MONTHLY OPERATING REPORT

File with Court and submit copy to United States Trustee within 20 days after end of month

Submit copy of report to any official committee appointed in the case

I declare under penalty of perjury (28 U.S.C. Section 1746) that this report and the attached documents are true and correct to the best of my knowledge and belief.

NOTES TO MONTHLY OPERATING REPORT

The PMI Group, Inc., a debtor and debtor in possession (the “Company” or “Debtor”), hereby submits its Monthly Operating Report (the “MOR”).

1. Description of the Cases. On November 23, 2011 (the “Petition Date”), the Debtor filed a voluntary petition with the Bankruptcy Court for reorganization under Chapter 11 of the Bankruptcy Code. The Debtor is operating its business as a debtor-in-possession pursuant to sections 1107(a) and 1108 of the Bankruptcy Code.

2. Basis of Presentation. The MOR is limited in scope, covers a limited time period and has been prepared solely for the purpose of complying with the monthly reporting requirements to the United States Bankruptcy Court. The financial information in the MOR is preliminary and unaudited and does not purport to show the financial statements of the Debtor in accordance with Generally Accepted Accounting Principles (“GAAP”) and, therefore, may exclude items required by GAAP, such as certain reclassifications, eliminations, accruals, valuations and disclosure items. The Debtor cautions readers not to place undue reliance upon the MOR. There can be no assurance that such information is complete and the MOR may be subject to revision.

The information contained in the MOR has been derived from the Debtor’s books and records in conjunction with information available from non -debtor affiliates. This information, however, has not been subject to procedures that would typically be applied to financial information presented in accordance with GAAP, and upon the application of such procedures, the Debtor believes that the financial information could be subject to changes and these changes could be material. The information furnished in this MOR includes primarily normal recurring adjustments but does not include all of the adjustments that would typically be made for financial statements prepared in accordance with GAAP. In addition, certain information and footnote disclosures normally included in financial statements prepared in accordance with GAAP have been condensed or omitted.

3. Recoveries and Causes of Action. The MOR, the Debtor’s Schedules of Assets and Liabilities and Statements of Financial Affairs may not include a complete list of causes of action it possesses as of the Petition Date or at any point thereafter. Regardless of the recoveries and causes of action listed, the Debtor reserves all of its rights with respect to any and all causes of action it may possess, including, but not limited to, avoidance actions or to assert any defenses, and nothing in this MOR shall be deemed a waiver or limitation of any of the Debtor’s rights to pursue any such causes of action or recovery or assert any defenses.

4. Reorganization Items. American Institute of Certified Public Accountant Statement of Position 90-7, “Financial Reporting by Entities in reorganization under the Bankruptcy Code” (“SOP 90-7”) requires separate disclosure of reorganization items such as realized gains and losses from the settlement of pre-petition liabilities, provisions for losses resulting from the reorganization and restructuring of the business as well as professional fees directly related to the process of reorganizing the Debtor under Chapter 11. Such items are

reflected in the MOR as Bankruptcy Related Expenses.

5. Liabilities Subject to Compromise. As a result of the Chapter 11 filing, most pre- petition indebtedness is subject to compromise or other treatment under a plan of reorganization. Generally, actions to enforce or otherwise effect payment of pre-petition liabilities are stayed. The Debtor has been paying and intends to continue to pay undisputed post-petition claims in the ordinary course of business. In addition, the Debtor may reject pre-petition executory contracts with respect to the Debtor’s operations with the approval of the Bankruptcy Court. Damages resulting from rejection of executory contracts are generally treated as general unsecured claims and will be classified as liabilities subject to compromise. The pre-petition liabilities that are subject to compromise are reported herein at the amounts expected to be allowed, although they may be settled for lesser amounts. The amounts currently classified as liabilities subject to compromise may be subject to future adjustments depending on Bankruptcy Court actions, further developments with respect to disputed claims, determinations of the secured status of certain claims, the values of any collateral securing such claims or other events. While GAAP requires fair market adjustments to certain obligations, including funded debt, this MOR states such obligations at notional value, including pre-petition accrued interest.

On February 19, 2013, the Bankruptcy Court approved the termination of the Debtor’s non-qualified deferred compensation plan and directed the trustee of the non-qualified deferred compensation plan trust to return the Debtor’s assets held in trust to the Debtor’s estate. In March 2013, the Debtor received these assets in the form of a cash distribution and has recorded the termination of the non-qualified deferred compensation plan as a liability subject to compromise.

6. Post-petition Accounts Payable. The Debtor has paid and continues to pay post- petition, undisputed invoices in the ordinary course and on generally agreed-upon terms.

7. Investments in Subsidiaries. Financial information related to any of the Debtor’s investments in its subsidiaries has been derived from the Debtor’s books and records in conjunction with the information available from non-debtor affiliates. Any information contained in this report pertaining to the Debtor’s investments in its subsidiaries should be viewed as preliminary and subject to revision.

8. Non-Cash Compensation Expense. Prior to the Petition Date, certain employees of the Debtor and its subsidiaries were granted stock-based compensation (including options). The Debtor has not expensed or accrued post-petition expense for outstanding stock-based grants and other stock-based compensation.

9. Cash and Fixed Income Securities. Cash balances include investment holdings consisting of U.S. Treasury Bills, primarily with a maturity of three months or less. These investments are listed at their initial purchase price and interest will be recognized at maturity.

10. Pre-Paid Assets. Pre-Paid Assets primarily consist of insurance policies being amortized on a straight-line basis over the life of each policy.

11. Deferred Assets and Liabilities and Other Accruals. The Debtor has reversed

certain accruals for pre-petition non-cash assets and liabilities, such as unamortized debt issuance expenses. There is significant uncertainty respecting the Debtor’s ability to utilize its deferred tax attributes; accordingly, a full valuation allowance has been applied to the deferred tax asset and no tax benefit or provision has been recognized.

12. Intercompany Balances. The “Accounts Receivable – Affiliates” and Post- petition “Accounts Payable – Intercompany” should be viewed as preliminary and subject to further revision. Given the timing of this filing, the Debtor and its affiliates may be required to make adjustments that may not be reflected in the period in which they occur.

The PMI Group, Inc.

Cash Receipts and Disbursements

March 1, 2013 to March 31, 2013

MOR-1

The PMI Group, Inc.

Schedule of Bank Accounts and Balances

As of March 31, 2013

MOR-1a

Note: All bank accounts have been reconciled for the period presented.

The PMI Group, Inc.

Schedule of Professional Fees Paid

March 1, 2013 to March 31, 2013

MOR-1b

STATEMENT OF OPERATIONS

THE PMI GROUP, INC.

For the Month Ended March 31, 2013

MOR-2

BALANCE SHEET

THE PMI GROUP, INC.

As of March 31, 2013

MOR-3

The PMI Group, Inc.

Summary of Post-Petition Taxes

For the Month Ended March 31, 2013

MOR-4

Representation: The PMI Group, Inc.’s 2011 federal income tax return, filed on September 12, 2012, indicates taxes owing of $4,862,835 (not including penalties or interest).

The PMI Group, Inc.

Summary of Post-Petition Debts

For the Month Ended March 31, 2013

MOR-4a

Unpaid Post-Petition Debts

Note: Operating Activity Payables include a gross taxes payable amount of $5,116,243 related to The PMI Group, Inc.’s 2011 federal income tax return, filed on September 12, 2012. This amount includes the penalties and interest that would have been payable on the tax due of $4,862,835, per a Notice of Unpaid Balance from the Internal Revenue Service dated October, 8, 2012, had payment of such $5,116,243 amount been made to the Internal Revenue Service by no later than October 22, 2012.

The PMI Group, Inc.

Debtor Questionnaire

For the Month Ended March 31, 2013

MOR-5

DEBTOR QUESTIONNAIRE