how long will harp be in effect

Currently it has an expiration date of 12/31/2016.

A better question is why you are delaying if you have a loan that qualifies? HARP does not set the rates but makes it possible to refinance even if you do not have any equity in the property, or even owe more than the home is currently worth based on an updated appraisal.

HARP is set to expire December 31st, 2015. However they may extend the date again.