That is a complete myth and really doesn't make any sense. Bankruptcy can be filed at any time, assuming you are otherwise eligible for relief under whichever chapter is filed. There is no minimum amount of debt, but Chapter 13 does have limits on the total amount of debt one can have (presently $360,475 for unsecured debt and $1,081,400 for secured debt).
Mark J. Markus, Attorney at Law
Handling exclusively bankruptcy law cases in California since 1991.
http://www.bklaw.com/
bankruptcy blog: http://www.bklaw.com/bankruptcy-blog/
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