The deadline for applying to the ING New York City Marathon for guaranteed entry is May 1. While there are several types of guaranteed entry, the most relevant here are those which are are performance-based. If you meet the standards, below, you will automatically be accepted for this year's race as long as you apply by May 1:
MEN -
18-39 years-old: Marathon, sub-2:55 or half-marathon sub-1:23
40-49: Marathon, sub-3:10 or half-marathon sub-1:30
50-59: Marathon, sub-3:30 or half-marathon sub-1:40
60+: Marathon, sub-3:45 or half-marathon sub-1:48
WOMEN -
18-39 years-old: Marathon, sub-3:23 or half-marathon sub-1:37
40-49: Marathon, sub-3:38 or half-marathon sub-1:44
50-59: Marathon, sub-3:52 or half-marathon sub-1:50
60+: Marathon, sub-4:13 or half-marathon sub-2:00:30
If you want to apply, go to the link below.