You see the crumbs on their shirt, the empty cookie jar, and you ask. "No, I didn't eat them." It is frustrating, and it can be worrying too. Why do kids lie, and does it mean something is wrong? Most of the time, lying is a normal part of growing up. This post explains what lying usually means at each age, how to respond calmly and how to teach honesty in a way that sticks.
This post is general information, not a diagnosis or advice about your child.
Why do kids lie? It is usually part of growing up
It may sound strange, but a child's first lies are often a sign that their thinking is growing. To lie, a child has to understand that other people have their own thoughts, and that those thoughts can be different from what really happened. Researchers link early lying with this growing understanding of other minds, and with self-control (see Sources).
Children lie for many of the same reasons adults do. They want to avoid trouble. They want to protect someone's feelings. They want to look good. They want something they are not supposed to have.
So a lie does not mean your child is bad, or that you have failed as a parent. It means they are learning how the social world works. Your job is to help them learn that honesty is the better path.
What lying looks like at each age
Lying changes as children grow (see Sources).
Preschoolers. Young children often mix up wishes and facts. "A dragon broke the lamp" may be part story, part hope. Simple denials are common too, like "I didn't do it," even with chocolate on their face. At this age, lying is usually short and easy to spot.
School-age kids. As children get older, they get better at keeping a story straight. Most lies at this age are to avoid getting in trouble. In one study of children aged 3 to 8, most of the children who broke a rule lied to hide it (see Sources). They may also tell polite white lies, like saying they love a gift they do not.
Teens. Teenager lying to parents often has to do with privacy and independence. Teens want more control over their own lives, and they may hide things they think you will not allow. Often, the lie hides a worry about how you will react. A teen who says "I was at Sam's house" might really be afraid you will be angry or disappointed.
Knowing why your child is lying can help you respond in a way that fits.
How to get your child to stop lying
There is no switch that turns off lying. But how you respond makes a big difference over time.
Stay calm. A big reaction can make the truth feel too scary to tell next time. Take a breath before you speak.
Do not set a trap. If you already know what happened, skip "Did you do it?" Say what you saw instead: "I see the cookies are gone. Let's talk about it."
Make the truth safe to tell. Let your child know that telling the truth will go better than lying. "I'm glad you told me. That took courage."
Separate the lie from the behaviour. Deal with what happened, like the broken lamp, and talk about honesty as a separate topic.
Use natural consequences. If they spilled juice, they help clean it up. Harsh punishment can make the truth feel even riskier to tell next time.
Stay connected. Children often find it easier to be honest with adults they feel close to and safe with.
None of these will work every time. Children are still learning. What matters is the pattern over months and years.
What to say in the moment
It helps to have a few calm phrases ready, so you are not making it up while you are upset. Here are some to try:
"I'm going to give you a minute to think, and then I'd like the true story."
"You won't be in more trouble for telling me the truth."
"I think you might be worried about what I'll say. Let's figure this out together."
"I love you, and lying makes it harder for me to trust you. Let's fix that."
With teens, it can help to name what you noticed and then listen: "Your story doesn't quite add up, and I'd rather hear the real version, even if it's hard." Then give them time. Many teens open up more in the car, on a walk or while doing something side by side than in a face-to-face talk.
If you lose your temper, that is okay too. You can come back later and say, "I got upset earlier. Can we try that again?" That shows your child how to repair, which is part of honesty too.
Teaching kids honesty
Teaching kids honesty happens mostly in small, everyday moments.
Model it. Children notice everything, including small adult lies. "Tell them I'm not home" teaches a lesson too. Try to be the kind of honest you want them to be.
Praise honesty out loud. When your child tells the truth, especially when it is hard, notice it. "Thank you for being honest. I know that wasn't easy."
Use stories. Books and shows often have characters who lie and what happens next. Ask your child, "Why do you think she lied? What could she have done instead?"
Talk about trust. Older kids can understand that honesty builds trust, and that trust brings more freedom.
Give teens privacy where it is safe. Teens who feel they have some private space may feel less need to lie to get it. Be clear about which things are not up for debate, like safety, and let some smaller things go.
When your child is lying all the time
Most lying is normal. But sometimes it is worth a closer look. If your child is lying all the time, it may be time to get some support.
Consider talking to someone if lying:
Happens constantly, even about small things
Hurts other people, or is used to get others in trouble
Comes with lasting changes in mood, sleep, school or friendships
Seems to hide something serious, like being bullied or being unsafe
Is causing a lot of stress in your home
Frequent lying can sometimes be a way a child copes with stress, worry or something hard that they do not know how to talk about. It is not a label or a diagnosis. It is a signal that your child may need help, and that you deserve support too.
Support for you and your child
You do not have to figure this out alone. We offer support for the whole family, in person or online.
Parent coaching can help you plan calm responses and build trust at home.
Counselling for children gives younger kids a safe place to talk and learn new skills.
Teen counselling gives teens a private space to talk about what is going on.
We have offices in Kitchener, Waterloo, Cambridge and Ottawa, and online sessions across Ontario.
Cost, billing and your first step
Sessions with our therapists range from $130 to $200, depending on the clinician.
We accept Health Spending Accounts (HSAs).
We can direct bill many insurers. Coverage depends on your plan, so check with your insurer before you start.
Book a free 15-minute consultation with our admin team. Tell us a little about your child, and we will help you find the right support for your family.
If your child talks about suicide or hurting themselves, call or text 9-8-8, or call 911 in an emergency.
If you're in crisis: if you or someone you love is in immediate danger, call 911. If you're thinking about suicide, call or text 9-8-8 any time, day or night.
Last reviewed: October 2026
Sources
Lee K. Little Liars: Development of Verbal Deception in Children. Child Development Perspectives, 2013.
Talwar V, Lee K. Social and Cognitive Correlates of Children's Lying Behavior. Child Development, 2008.