UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 10-Q/A

(Amendment No. 1)

For the quarterly period ended August 31, 2012

OR

For the transition period from          to         

COMMISSION FILE NUMBER: 001-33292

TORTOISE CAPITAL RESOURCES CORPORATION

(Exact name of registrant as specified in its charter)

11550 ASH STREET, SUITE 300

LEAWOOD, KANSAS 66211

(Address of principal executive office) (Zip Code)

(913) 981-1020

(Registrant’s telephone number, including area code)

Not Applicable

(Former name, former address and former fiscal year, if changed since last report)

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes  x    No  ¨

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).    Yes  x    No  ¨

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, or a smaller reporting company. See the definitions of “large accelerated filer”, “accelerated filer”, and “smaller reporting company” in Rule 12b-2 of the Exchange Act (Check one):

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Exchange Act).    Yes  ¨    No  x

The number of shares of the issuer’s Common Stock, $0.001 par value, outstanding as of September 30, 2012 was 9,187,470.

Explanatory Note:

The sole purpose of this amendment on Form 10-Q/A to Tortoise Capital Resources Quarterly Report on Form 10-Q for the quarter ended August 31, 2012, filed with the Securities and Exchange Commission on October 5, 2012 (the “Form 10-Q”), is to furnish the interactive data file formatted in XBRL (Extensible Business Reporting Language) as Exhibit 101 to the Form 10-Q in accordance with Rule 405 of Regulations S-T.

No changes have been made to the Form 10-Q other than those described above. This Form 10-Q/A speaks as of the original filing date of the Form 10-Q, does not reflect events that may have occurred subsequent to the original filing date of the Form 10-Q, and does not modify or update in any way disclosures made in the Form 10-Q.

ITEM 6. EXHIBITS

All other exhibits for which provision is made in the applicable regulations of the Securities and Exchange Commission are not required under the related instruction or are inapplicable and therefore have been omitted.

SIGNATURE

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 thereunto duly authorized.

Date: November 5, 2012