Kindergarten Cutoff Date by State

The kindergarten cutoff is the calendar date by which a child must turn 5 years old to start kindergarten in a given school year. In US public schools, cutoffs vary from late July all the way to January 1 of the following year, depending on the state. The cutoff effectively splits the calendar in two: a child born one day before the cutoff is eligible this fall; a child born one day after waits another year. That single date can mean a 12-month difference in your child's school starting age, which compounds across years.

Cutoffs are set at the state level but districts often have authority to override or modify them within state limits. Some states (California, Colorado) have "transitional kindergarten" or pre-K bridges for fall birthdays that miss the cutoff. Some allow early-entry assessments where a younger child can test in. A handful of states (Connecticut, New York) push the cutoff late into the calendar year, meaning kids can start kindergarten while still 4 years old. Earlier cutoff states (Indiana, Missouri, Kentucky at August 1) tend to have older-on-average kindergarten classes.

"Redshirting" — deliberately holding a child back a year so they're among the older kids in class — has become more common, especially for late-summer-birthday boys. Research on whether redshirting helps long-term is genuinely mixed; the short-term effects are usually positive, the long-term effects often fade. Your state's cutoff is the floor, not a ceiling: you can almost always start a child later than the cutoff allows. Starting earlier than the cutoff is harder and usually requires a formal early-entry petition.