Pre-construction period means the period starting the from the day of commencement of construction or the day of borrowing whichever is later and ending on March 31 immediately prior to the year of completion of construction.
Example: X has taken a loan on 1/4/93 for construction of house property. Construction started on 1/4/95 and completed on 17/8/06. In such case, pre construction period will be a period starting from 1/4/95 and ending on 31/3/06
Treatment: Interest for pre construction period will be accumulated and claimed as deduction over a period of 5 continuous years in equal installments commencing from the year of completion of construction