Our son's birthday falls two weeks before the kindergarten cutoff date. Technically, legally, he was eligible to start. He met the age requirement. He was enrolled. His spot was saved. And yet every fiber of my mom intuition was whispering, quietly at first and then louder as September approached: he is not ready.
He was still having trouble separating from me at preschool drop-off. He melted down when routines changed. His attention span was short even by four-year-old standards. He preferred parallel play to cooperative play. He could not write his name, had no interest in letters, and still needed help in the bathroom sometimes. He was a wonderful, smart, funny, sensitive kid. And I was not sure he was ready to be a kindergartner.
And so began months of agonizing over one of the most controversial decisions in early childhood education: do we send him, or do we give him another year?
What Is Red-Shirting?
Red-shirting, a term borrowed from college athletics, refers to the practice of delaying a child's entry into kindergarten by a year, even though they are age-eligible. It is most common among children with late summer or early fall birthdays who would be among the youngest in their class if they started on time. Parents who red-shirt typically keep their child in preschool for an additional year, giving them more time to develop socially, emotionally, and academically before starting kindergarten.
It is an increasingly popular practice. Estimates suggest that somewhere between 5 and 10 percent of kindergarten-eligible children are held back each year, with higher rates among boys and among families with more resources.
The Case for Waiting
There are genuine advantages to being older in your class, especially in the early years. Older children tend to have more developed self-regulation, longer attention spans, better fine motor skills, and more social maturity. They may find the academic expectations easier to meet, which builds confidence early. They are less likely to struggle with the behavioral expectations of a structured classroom because their brain is simply further along in development.
Research does support some of this. A well-known study published in the National Bureau of Economic Research found that children who were the oldest in their kindergarten class showed better self-regulation and were less likely to be diagnosed with attention-related issues compared to the youngest students in the same class. Another study found that being older in your grade correlated with slightly better test scores in early elementary, slightly higher rates of college enrollment, and slightly lower rates of incarceration (though this last finding is debated).
For kids who are showing clear signs that they are not developmentally ready for the demands of kindergarten, specifically in the areas of emotional regulation, social skills, and independence, an extra year of preschool can make a meaningful difference. Entering kindergarten confident and capable sets a positive trajectory that builds on itself year after year.
The Case for Sending
On the other side of the debate, researchers point out several important counterarguments. The academic advantage of being older tends to fade by second or third grade, as younger students catch up developmentally. By middle school, there is little measurable difference between the oldest and youngest students in a class in terms of academic performance.
There is also a concern about the long-term effects. A red-shirted child will be older than their classmates throughout their school career. By high school, they may be nearly a full year older than some peers, which can create social mismatches, especially during puberty. A child who turns 19 in their senior year while some classmates are still 17 may feel out of step socially.
Perhaps the most important criticism of red-shirting is the equity issue. The practice is most common among white, affluent families. These families have the resources to pay for an extra year of preschool or have a stay-at-home parent. Lower-income families, families of color, and families without access to quality preschool are much less likely to red-shirt, which means the practice can widen existing achievement gaps. When affluent families hold their children back, the kindergarten classroom becomes a mix of older, more advantaged children and younger, less advantaged children, which can create a skewed environment that disadvantages the kids who were sent on time.
The Questions That Helped Us Decide
After reading everything I could find and talking to what felt like every educator, pediatrician, and parent in a fifty-mile radius, we ultimately came back to a few core questions about our specific child:
Can he handle the social demands of kindergarten? Not just academically, but socially. Can he share, take turns, function in a group, and navigate conflict without falling apart? Can he manage the emotional demands? Can he separate from us without extreme distress? Can he handle frustration and disappointment? Can he recover from a bad moment and move on?
What do his preschool teachers say? They see him in a school-like setting every day. Their perspective is invaluable because they know what kindergarten readiness looks like in practice, not just in theory. We asked them directly: "If this were your child, would you send him?"
Is this about him or about us? This was the hardest question. Was our hesitation based on genuine observations about his readiness, or was it based on our own anxiety about letting him grow up? Sometimes parents delay kindergarten not because the child is not ready, but because the parent is not ready. I had to be honest with myself about whether my instinct was about him or about me.
What We Decided
We waited. We gave him the extra year. And I want to be honest: I do not know if it was the "right" decision. I do not think there is a universally right answer, only the best answer for a specific child in a specific situation with the information available at the time.
What I can say is that the extra year was good for him. He started kindergarten more confident, more independent, and more socially ready. He walked in on the first day and did not cry. He made friends quickly. He thrived academically without feeling overwhelmed. Would he have been fine if we had sent him the year before? Probably. Eventually. But the extra year made the transition smoother, and I do not regret it.
What I Would Tell Another Parent
If you are in this position, wrestling with this decision, here is what I want you to know.
Talk to the people who know your child best, their preschool teachers, their pediatrician, and trust their input. They have a perspective you do not have because they see your child in contexts you do not see.
Look at the whole child, not just academics. A child can know all their letters and still not be ready for kindergarten if they cannot manage their emotions, function in a group, or handle the independence the school day requires.
Do not decide based on peer pressure in either direction. Some parent circles treat red-shirting like a competitive advantage and push everyone to do it. Other circles treat it like helicopter parenting and judge anyone who waits. Ignore both camps. This decision is about your child, not about what other families are doing.
And know this: there is no version of this decision that ruins your child. Kids are resilient. They adapt. Whether they start kindergarten at barely five or almost six, they will find their footing. Your job is to support them wherever they land, and you are clearly already doing that because you are putting this much thought into it.
Trust your gut. Trust your kid. And know that whatever you decide, you are making it with love, and that is the only thing that truly matters.