Post-effective Amendment (investment Company, Rule 485(b)) (485bpos)

AS FILED WITH THE SECURITIES AND EXCHANGE COMMISSION ON MAY 10, 2013

SECURITIES ACT FILE NO. 002-10806

INVESTMENT COMPANY ACT FILE NO. 811-00216

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM N-1A

REGISTRATION STATEMENT UNDER THE SECURITIES ACT OF 1933: [X]

Pre-Effective Amendment No. ___ [ ]

Post-Effective Amendment No. 121 [X]

and/or

REGISTRATION STATEMENT UNDER THE INVESTMENT COMPANY ACT OF 1940: [X]

Amendment No. 62 [X]

(Check Appropriate Box or Boxes)

NICHOLAS HIGH INCOME FUND, INC.

(Exact Name of Registrant as Specified in Charter)

700 North Water Street

Milwaukee, WI 53202

(Address of Principal Executive Offices) (Zip Code)

Registrant's Telephone Number, Including Area Code (414) 272-4650

Jeffrey T. May, Senior Vice President

Nicholas High Income Fund, Inc.

700 North Water Street, Suite 1010

Milwaukee, WI 53202

(Name and Address of Agent for Service)

WITH A COPY TO:

K. Thor Lundgren, Esq.

Jason T. Thompson, Esq.

Michael Best & Friedrich LLP

100 East Wisconsin Avenue, Suite 3300

Milwaukee, WI 53202

It is proposed that this filing will become effective (check appropriate box):

[ x ] Immediately upon filing pursuant to paragraph (b) of Rule 485.

[ ] On (date) pursuant to paragraph (b) of Rule 485.

[ ] 60 days after filing pursuant to paragraph (a)(1) of Rule 485.

[ ] On (date) pursuant to paragraph (a)(1) of Rule 485.

[ ] 75 days after filing pursuant to paragraph (a)(2) of Rule 485.

[ ] On (date) pursuant to paragraph (a)(2) of Rule 485.

If appropriate, check the following box:

[ ] This post-effective amendment designates a new effective date for a previously filed post-effective amendment.

SIGNATURES

Pursuant to the requirements of the Securities Act of 1933 and the Investment Company Act of 1940, each as amended, the Registrant certifies that it meets all of the requirements for effectiveness of the registration statement under Rule 485(b) under the Securities Act of 1933, as amended, and has duly caused this Registration Statement to be signed below on its behalf by the undersigned, thereunto duly authorized, in the City of Milwaukee and State of Wisconsin, on the 10 ^th day of May, 2013.

Nicholas High Income Fund, Inc.

By: /s/ Jeffrey T. May

Jeffrey T. May, Senior Vice President, Secretary, Treasurer and Principal

Financial and Accounting Officer

Pursuant to the requirements of the Securities Act of 1933, as amended, and the Investment Company Act of 1940, as amended, this Amendment to the Registration Statement has been signed below by the following persons in the capacities indicated on the 10 ^th day of May, 2013.

/s/ David O. Nicholas*	President (Chief Executive
David O. Nicholas	Officer), and Director

/s/ Robert H. Bock*	Director
Robert H. Bock

/s/ Jay H. Robertson*	Director
Jay H. Robertson

/s/ Timothy P. Reiland*	Director
Timothy P. Reiland



* By: /s/ Jeffrey T. May
Jeffrey T. May,
Attorney-in-Fact pursuant to
Power of Attorney previously filed.

EXHIBIT INDEX

Exhibit	Exhibit No.
XBRL Instance Document	EX-101.INS
XBRL Taxonomy Extension Schema Document	EX-101.SCH
XBRL Taxonomy Extension Calculation Linkbase	EX-101.CAL
XBRL Taxonomy Extension Definition Linkbase	EX-101.DEF
XBRL Taxonomy Extension Labels Linkbase	EX-101.LAB
XBRL Taxonomy Extension Presentation Linkbase	EX-101.PRE