UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 10-Q/A

(Amendment No. 1)

Commission File Number 000-23357

BIOANALYTICAL SYSTEMS, INC.

 (Exact name of the registrant as specified in its charter)

(765) 463-4527

(Registrant's telephone number, including area code)

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 for 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 website, 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 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 Act).    YES ¨ NO x

As of August 8, 2012, 7,307,864 of the registrant's common shares were outstanding.

EXPLANATORY NOTE

The purpose of this Amendment No. 1 to the Company’s Quarterly Report on Form 10-Q for the quarter ended June 30, 2012, filed with the Securities and Exchange Commission on August 14, 2012, is solely to furnish Exhibit 101 to the Form 10-Q.  Exhibit 101 provides the financial statements and related notes from the Form 10-Q formatted in XBRL (eXtensible Business Reporting Language). Except as set forth in the immediately preceding sentence, this Amendment does not alter or restate any of the information set forth in the Original Filing. In addition, this Amendment No. 1 does not reflect any subsequent events occurring after August 14, 2012, the original filing date of our Form 10-Q.

As required by Rule 12b-15 under the Securities and Exchange Act of 1934, as amended, new certifications by our interim principal executive officer and principal financial officer are filed as exhibits to this Amendment No. 1 to the Company’s Form 10-Q under Item 6 of Part II.

PART II

ITEM 6 - EXHIBITS

(a) 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 thereunto duly authorized: