Writing a Christmas card to your in-laws can feel surprisingly tricky. You want to sound warm without being over-familiar, and grateful without sounding stiff, and a plain 'Merry Christmas' can feel a little distant for people who are, after all, family.
Below you will find ready-to-use messages for a mother-in-law, father-in-law, son-in-law and daughter-in-law, plus short options and a few written for a first Christmas as part of the family. Pick the one that sounds most like you and change a few words to suit.
Whether you have been part of the family for decades or are spending your first Christmas with them, you should find the right words here in a couple of minutes, along with a simple way to make any message feel personal.
Why the Right Words Matter in an In-Law's Christmas Card
In-law relationships are unusual. You did not choose these relatives, yet they are a big part of your life, and the Christmas card is often one of the few moments in the year when you put something thoughtful in writing.
That is why the message matters. A generic line can feel a little cold, while a warm and genuine one shows you appreciate them, which tends to be remembered long after the card has been taken down.
The good news is that you do not need to write a lot. One or two sincere sentences are almost always enough, and the tone can be as warm, respectful or light-hearted as suits your relationship. Most people find that the shorter the message, the more natural it sounds, so there is no pressure to write a paragraph.
Below are messages for parents-in-law, then for a son-in-law or daughter-in-law, followed by short options and a quick way to personalise whichever message you choose.
Christmas Messages for a Mother-in-Law or Father-in-Law
These messages are warm, grateful and respectful. Most work for either a mother-in-law or a father-in-law, so use one exactly as written or adjust a few words to suit them.
- Merry Christmas to the people who welcomed me so warmly into the family. Thank you for everything you do.
- Thank you for your kindness, your support and your wonderful cooking this year. Wishing you a very merry Christmas.
- Wishing you a Christmas filled with love, laughter and plenty of good food. I'm so lucky to have you as family.
- Thank you for raising such a wonderful person, and for always making me feel like one of the family. Merry Christmas.
- Merry Christmas to a mother-in-law who is more like a second mum. Thank you for always being there.
- Merry Christmas to a father-in-law who always has the best advice and the worst jokes. Thank you for both.
- Hoping your Christmas is as warm and welcoming as the one you always create for us. With love and thanks.
- Thank you for being so kind to me and to our family. Wishing you a peaceful, happy and relaxing Christmas.
- Merry Christmas to two of the kindest people I know. Thank you for always making our family feel so loved and looked after.
- Every Christmas at yours feels like the best one yet. Thank you for the warm welcome, the great company and everything in between.
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Christmas Messages for a Son-in-Law or Daughter-in-Law
A message to a son-in-law or daughter-in-law is a chance to say they are truly part of the family. These are welcoming, appreciative and sometimes gently funny, and they work for either.
- Merry Christmas! We're so glad you're part of the family, and we couldn't have chosen anyone better.
- Thank you for making our family happier, and for being so good to the person we love. Merry Christmas.
- Wishing you a Christmas full of joy, good food and as little washing up as possible. So glad you're one of us.
- Merry Christmas to the best addition to our family. We feel very lucky to have you.
- Thank you for everything you do for us, from the big things to the small. Have a wonderful Christmas.
- You have been the best thing to happen to our family, and every Christmas is better with you in it. Merry Christmas.
- Merry Christmas to a son-in-law who always laughs at my jokes, even the bad ones. Thank you for being so kind.
- Merry Christmas to a daughter-in-law who makes our family complete. We love you very much.
- Thank you for being such a thoughtful, kind and generous part of our family this year. Wishing you a very merry Christmas.
- Merry Christmas to someone who fits into our family as if you had always been part of it. We're so happy you're here.
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Short Messages and a First Christmas with the Family
When you are short on space, or simply prefer to keep things simple, a few well-chosen words work beautifully. This set includes a few for a first Christmas as part of the family, and each one works for any in-law.
- Merry Christmas, with love and thanks.
- Wishing you a very happy Christmas.
- Thank you for everything. Merry Christmas.
- Happy first Christmas as part of the family. We're so glad you're here.
- Merry Christmas to my favourite in-laws.
- So happy to be spending Christmas with you. Merry Christmas.
- Warmest wishes for a peaceful and happy Christmas.
- Thank you for welcoming me so warmly. Merry Christmas.
- Merry Christmas from all of us, with lots of love.
- Wishing you a magical Christmas and a wonderful new year.
- Merry Christmas. Thank you for being such wonderful in-laws.
- Sending you lots of love this Christmas and always.
- Happy Christmas to a very special part of our family.
How to Personalise Your In-Law Christmas Message
Any message above will work as it is, but one personal detail makes it feel unmistakably yours. Here is a quick way to add it before you seal the envelope.
- Pick the message above that matches how close you are, whether that is warm and respectful, light-hearted or short and simple, and keep the wording close to how you would speak to them in person.
- Think of one thing you are genuinely thankful for, such as a favourite family tradition, a kind gesture or a meal you still talk about.
- Add one sentence about it, either before or after the message you chose, for example 'Thank you for hosting us so beautifully again this year.'
- Use the names or nicknames you normally use for them. It is a small change, but it makes the message sound like you.
- Read it back as if you were the one receiving it. If it feels sincere and sounds like you, it is ready to write.
Frequently Asked Questions
What should I write in a Christmas card for my mother-in-law or father-in-law?
Aim for warm, grateful and simple. A line such as 'Thank you for always making me feel so welcome, Merry Christmas' says what matters, and adding one specific thing you appreciate makes it feel truly personal.
What do I write in a Christmas card for my son-in-law or daughter-in-law?
Make them feel welcome and appreciated. Tell them you are glad they are part of the family, thank them for something specific, and add a light-hearted line if that suits your relationship.
Should I sign an in-law's Christmas card from just me or from my partner too?
Either is fine. Many couples sign together from both of them, but writing a personal message from you alone can feel especially thoughtful, so choose whichever feels most natural for your family.
Whichever message you choose, a short and sincere line with one personal detail is all it takes to make your card feel thoughtful rather than formal, whatever your relationship with your in-laws is like.
If you are still looking for the right card to go with it, browse the personalised Christmas card collection below for designs for a mother-in-law, father-in-law, son-in-law or daughter-in-law, from classic and festive to funny.
A kind word at Christmas is a small thing that means a great deal, and it is one your in-laws will probably remember long after the decorations have gone back in the loft.
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