Birthday letters for your child after you die: a practical system

To leave birthday letters for your child in case you die, write a small set of letters for key ages, keep each one short and specific, and set up a system that will still work in 10 or 20 years. The simplest reliable system is one letter per age, each set to arrive on the birthday it was written for, plus a trusted adult who knows the letters exist.

This guide covers what to write at each age, example wording, and the honest practicalities of getting each letter to your child on the right day, years from now.

Why birthday letters?

Birthdays are the days a missing parent is felt most. A letter that arrives on that day says: I thought about this exact moment, I knew you'd be older, and I still love you. It turns an absence into a kind of presence.

They're also easier to write than one big goodbye. Writing "everything I want to tell you" is paralysing. Writing to a 13-year-old on the morning of their birthday is something you can picture, and a picture is what gets you writing.

If you haven't read it yet, our guide on how to write a letter to your child covers the basic shape, and our main guide on what to write in a goodbye letter covers letters to everyone else. This guide is about turning one letter into a set, and making sure they arrive.

How many letters should you write?

Not one for every year. Twenty-odd letters is a heavy project and the middle ones tend to repeat each other. A set for key ages is more realistic, and each one can be fuller.

A good starting set:

• 5: a letter a grown-up reads aloud
• 10: the first one they read themselves
• 13: becoming a teenager
• 16: more independence, first big choices
• 18: adulthood
• 21: the start of grown-up life
• 30: a letter to an adult, from an adult

Add or swap ages that fit your family: starting secondary school, a religious milestone, 40. If your child is already 9, start at 10. If you only manage three, make them 13, 18 and 21.

What to write at each age

The shape stays the same at every age: one memory, what you see in them, and something that belongs to that birthday. What changes is the voice and how much you say.

Should you mention that you've died? Lightly. One sentence, such as "I'm sorry I can't be there today", is enough. Then write as if you're sitting beside them with the cake.

Ages 5 and 10: short, warm, read aloud

For young children, keep it to a page. Assume an adult will read it to them, so write in simple words. One memory, one thing you love, and a hope for their day. Leave the big themes for later.

Ages 13 and 16: honest, light, a little funny

Teenagers have a sharp nose for lectures. Tell them something embarrassing about your own teenage years. Tell them what you see in them. Give one piece of permission rather than a rule: permission to get things wrong, to change their mind, to be sad.

Ages 18, 21 and 30: adult to adult

These can be longer. You can talk about values, love, work and what you learned the hard way. You can say more directly that you wish you were there. If you have a lot to say about values, an ethical will is a good companion document.

How do you make sure the letters arrive on time?

This is the hard part, and it's worth being honest about. Email addresses change, children move, and plans made today have to hold for years. The most reliable plans give each letter its own date and make sure a person knows the letters exist.

Here's a system that works.

1. Write one letter per age

   Write each letter for a specific birthday: "for your 13th", "for your 18th", and so on. Keep them as separate letters rather than one long document, so each can arrive on its own day.

2. Set each one to arrive on its birthday

   Save your child's birthday, then set each letter to arrive when they turn the age it was written for. The 13th-birthday letter waits for their 13th birthday, the 18th for their 18th. If a birthday has already passed by the time the letters are released, that letter arrives on their next birthday instead, so nothing is lost.

3. Tell a trusted adult

   Usually the person you've named as guardian, or a grandparent, godparent or close friend who is likely to be in your child's life for decades. Tell them the letters exist and roughly when they'll arrive, and make sure they know your child's current email address matters. Our guide to choosing a guardian for your children covers how to have that conversation.

4. Note it in your papers

   Write a short note in your will folder or letter of wishes saying the birthday letters exist and who knows about them. If the first person can't help, someone else can pick it up.

5. Add paper copies or videos if you want to

   Some parents also keep a sealed, numbered paper set with the guardian, marked "Open on your 13th birthday" and so on. It's an optional extra, not a requirement. If you record short videos for the big birthdays, you can add each one to that birthday's message in Sealkept, such as a video for when they turn 18. It's still worth keeping a copy with the guardian too. Our legacy video questions can help you start.

Where Sealkept fits

Sealkept is a careful dead man's switch. You write letters, record voice notes or videos, or add photos and documents, and address each message to a specific person. You check in weekly, monthly, quarterly or yearly; if you stop, there are reminders, optional verifiers and a grace period before anything is sent.

For birthday letters, the useful rule is "deliver when they turn" a chosen age. With your child's birthday saved, you can set one letter for when they turn 13, another for 18, another for 21, and each waits for its own birthday, by email with a private link. A video or voice note in that message plays right on the page, and your child can download a copy to keep. They're only sent if your switch has released; if you keep checking in, they stay sealed. Without an age, a letter arrives on their next birthday after release.

What Sealkept can't do is deliver on a date that isn't a birthday, such as a wedding day or a graduation. For those, pick the nearest meaningful birthday, or label the letter "for your wedding day" and let it arrive with the others.

Our page for new parents explains how to set up a letter for each age alongside a guardian note.

Common worries

"What if they're upset by it?"

They might cry. That's not the same as being harmed. Children who lose a parent often say what hurts most is not knowing what that parent thought of them. A short, loving letter answers that.

"What if I write the wrong thing?"

Keep it about them and about love. Avoid pressure ("I know you'll be a doctor"), comparisons with siblings and instructions about the other parent. If it's warm and specific, it isn't wrong.

"I'm not a writer."

You don't need to be. Your child wants your words, not good ones. Write it the way you'd say it.

Start with one: the birthday that's coming next. Then the set will follow.