9. STATUTORY INFORMATION AND DIVIDEND RESTRICTIONS

The statutory financial statements of our three insurance companies are presented on the basis of accounting practices prescribed or permitted by the Illinois Department of Insurance (IDOI), which has adopted the NAIC statutory accounting principles as the basis of its statutory accounting principles. We do not use any permitted statutory accounting principles that differ from NAIC prescribed statutory accounting principles. In converting from statutory to GAAP, typical adjustments include deferral of policy acquisition costs, the inclusion of statutory non-admitted assets and the inclusion of net unrealized holding gains or losses in shareholders’ equity relating to fixed income securities.

The NAIC has risk based capital (RBC) requirements for insurance companies to calculate and report information under a risk-based formula, which measures statutory capital and surplus needs based upon a regulatory definition of risk relative to the company’s balance sheet and mix of products. As of December 31, 2018, each of our insurance subsidiaries had an RBC amount in excess of the authorized control level RBC, as defined by the NAIC. RLI Insurance Company (RLI Ins.), our principal insurance company subsidiary, had an authorized control level RBC of $170.9 million, $157.7 million and $127.0 million as of December 31, 2018, 2017 and 2016, respectively, compared to actual statutory capital and surplus of $829.8 million, $864.6 million and $860.0 million, respectively, for these same periods.

Year-end statutory surplus for 2018 presented in the table below includes $132.8 million of RLI Corp. stock (cost basis of $64.6 million) held by Mt. Hawley Insurance Company, compared to $106.9 million and $104.4 million in 2017 and 2016, respectively. The Securities Valuation Office provides specific guidance for valuing this investment, which is eliminated in our GAAP consolidated financial statements.

The following table includes selected information for our insurance subsidiaries for the year ending and as of December 31:


(in thousands)	2018		2017		2016
Consolidated net income, statutory basis	$	135,791	$	72,889	$	128,165
Consolidated surplus, statutory basis	$	829,775	$	864,554	$	859,976

As discussed in note 1.A., our three insurance companies are subsidiaries of RLI Corp, with RLI Ins. as the first-level, or principal, insurance subsidiary. At the holding company (RLI Corp.) level, we rely largely on dividends from our insurance company subsidiaries to meet our obligations for paying principal and interest on outstanding debt, corporate expenses and dividends to RLI Corp. shareholders. As discussed further below, dividend payments to RLI Corp. from our principal insurance subsidiary are restricted by state insurance laws as to the amount that may be paid without prior approval of the insurance regulatory authorities of Illinois. As a result, we may not be able to receive dividends from such subsidiary at times and in amounts necessary to pay desired dividends to RLI Corp. shareholders. On a GAAP basis, as of December 31, 2018, our holding company had $806.8 million in equity. This includes amounts related to the equity of our insurance subsidiaries, which is subject to regulatory restrictions under state insurance laws. The unrestricted portion of holding company net assets is comprised primarily of investments and cash, including $63.1 million in liquid assets, which more than covers our annual holding company expenditures. Unrestricted funds at the holding company are available to fund debt interest, general corporate obligations and regular dividend payments to our shareholders. If necessary, the holding company also has other potential sources of liquidity that could provide for additional funding to meet corporate obligations or pay shareholder dividends, which include a revolving line of credit, as well as access to capital markets.

Ordinary dividends, which may be paid by our principal insurance subsidiary without prior regulatory approval, are subject to certain limitations based upon statutory income, surplus and earned surplus. The maximum ordinary dividend distribution from our principal insurance subsidiary in a rolling 12-month period is limited by Illinois law to the greater of 10 percent of RLI Ins. policyholder surplus, as of December 31 of the preceding year, or the net income of RLI Ins. for the 12-month period ending December 31 of the preceding year. Ordinary dividends are further restricted by the requirement that they be paid from earned surplus. In 2018, 2017 and 2016, our principal insurance subsidiary paid ordinary dividends totaling $13.0 million, $107.0 million and $123.6 million, respectively, to RLI Corp. Any dividend distribution in excess of the ordinary dividend limits is deemed extraordinary and requires prior approval from the IDOI. In 2018, our principal insurance subsidiary sought and received regulatory approval prior to the payment of extraordinary dividends totaling $110.0 million. No extraordinary dividends were paid in 2017 or 2016. Given the amount of dividends paid during the prior rolling 12-month period, the net assets of our principal insurance subsidiary are restricted until the fourth quarter of 2019 and cannot be distributed to RLI Corp. without prior approval of the IDOI. In addition to restrictions from our principal subsidiary’s insurance regulator, we also consider internal models and how capital adequacy is defined by our rating agencies in determining amounts available for distribution. However, as discussed above, RLI Corp. had the necessary amount of unrestricted liquid net assets on hand at December 31, 2018 to cover normal annual holding company expenditures as they are incurred and become payable in 2019.