From my understanding it is 1 year though the inquiry remains for 2 years. I may be wrong but someone will soon correct me, that's what I love about this site.
The inquiry counts against (or in) your score for one year - it remains on your report for 2 years. Only if a lender actually LOOKS at the report will they see anything from 13-24 months. Many issue cards by score & for a mortgage the whole report is used.
