UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 8-K

Current Report

Pursuant to Section 13 or 15(d)

of the Securities Exchange Act of 1934

Date of Report (Date of earliest event reported):

December 4, 2013

Sierra Income Corporation

(Exact name of registrant as specified in its charter)

375 Park Ave, 33^rd Floor

New York, NY 10152

(Address of principal executive offices and zip code)

Registrant’s telephone number, including area code: (212) 759-0777

Check the appropriate box below if the Form 8-K is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

On December 4, 2013, the Company entered into a three-year senior secured syndicated revolving credit facility with a one-year term out period (the “ING Facility”) pursuant to a Senior Secured Revolving Credit Agreement (the “Revolving Credit Agreement”) with certain lenders party thereto from time to time and ING Capital LLC, as administrative agent. The ING Facility matures on December 4, 2017 and is secured by substantially all of the Company’s assets, subject to certain exclusions as further set forth in a Guarantee, Pledge and Security Agreement (the “Security Agreement”) entered into in connection with the Revolving Credit Agreement, among the Company, the Subsidiary Guarantors party thereto, ING Capital LLC, as Administrative Agent, each Financial Agent and Designated Indebtedness Holder party thereto and ING Capital LLC, as Collateral Agent. The ING Facility also includes usual and customary representations, covenants and events of default for senior secured revolving credit facilities of this nature.

The ING Facility allows for the Company, at its option, to borrow money at a rate of either (i) an alternate base rate plus 2.50% per annum or (ii) LIBOR plus 3.50% per annum. The interest rate margins are subject to certain step-downs upon the satisfaction of certain conditions described in the Revolving Credit Agreement. The alternate base rate will be the greatest of (i) the U.S. Prime Rate set forth in the Wall Street Journal, (ii) the federal funds effective rate plus  ¹⁄₂ of 1%, and (iii) three month LIBOR plus 1%. The initial commitment under the ING Facility is $50,000,000, and the ING Facility includes an accordion feature that allows for potential future expansion of the ING Facility up to a total of $100,000,000. Availability of loans under the ING Facility is linked to the valuation of the collateral pursuant to a borrowing base mechanism.

The Company is also required to pay a commitment fee to the lenders based on the daily unused portion of the aggregate commitments under the ING Facility. The commitment fee is (x) 0.50% for the initial six month period commencing on the closing date and (y) thereafter, 1% of the aggregate unused commitments if the used portion of the aggregate commitments is less than or equal to 35% of the aggregate commitments, or 0.50% if the used portion of the aggregate commitments is greater than 35% of the aggregate commitments. The ING Facility provides that the Company may use the proceeds of the facility for general corporate purposes, including making investments in accordance with the Company’s investment objective and strategy.

Borrowings under the Revolving Credit Agreement are subject to, among other things, a minimum borrowing base. Substantially all of the Company’s assets are pledged as collateral under the Revolving Credit Agreement. The ING Facility requires the Company to, among other things (i) make representations and warranties regarding the collateral as well the Company’s business and operations, (ii) agree to certain indemnification obligations, and (iii) agree to comply with various affirmative and negative covenants. The documents for the Revolving Credit Agreement also include default provisions, such as the failure to make timely payments under the Revolving Credit Agreement, the occurrence of a change in control, and the failure by the Company to materially perform under the operative agreements governing the Revolving Credit Agreement, which, if not complied with, could accelerate repayment under the Revolving Credit Agreement, thereby materially and adversely affecting the Company’s liquidity, financial condition and results of operations.

In connection with the security interest established under the Security Agreement, the Company, ING Capital LLC, in its capacity as collateral agent, and State Street Bank and Trust Company, in its capacity as the Company’s custodian, entered into a Control Agreement dated as of December 4, 2013 (the “Control Agreement”), in order to, among other things, perfect the security interest granted pursuant to the Security Agreement in, and provide for control over, the related collateral.

The foregoing description of the Revolving Credit Agreement does not purport to be complete and is qualified in its entirety by reference to the full text of the Revolving Credit Agreement attached hereto as Exhibit 10.1.

The foregoing description of the Security Agreement does not purport to be complete and is qualified in its entirety by reference to the full text of the Security Agreement attached hereto as Exhibit 10.2.

The foregoing description of the Control Agreement does not purport to be complete and is qualified in its entirety by reference to the full text of the Control Agreement attached hereto as Exhibit 10.3.

On December 9, 2013, SIC issued a press release announcing the closing of the Credit Facility, a copy of which is attached hereto as Exhibit 99.1 and is incorporated herein by reference.

The information set forth under Item 1.01 of this current report on Form 8-K is hereby incorporated in this Item 2.03 by reference.

(a) Not applicable.

(b) Not applicable.

(c) Not applicable.

(d) Exhibits.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

EXHIBIT INDEX