45 Thoughtful Birthday Wishes for Your Brother-in-Law
Give that blank birthday card a personalized touch.
Photos: Stocksy and Getty | Graphic: Natalie Romine
Your brother-in-law instantly made you feel included, always makes things fun and is a reliable friend. So on a day all about celebrating the amazing guy he is, you want to say, "Happy Birthday, brother-in-law," in an extra special way. Whether this is your first year staring at a blank card or you've been faced with the challenge before, knowing what to write in your brother-in-law's birthday card can be tough. That's why we've compiled a list of birthday wishes for a brother-in-law as inspiration for his card, text or a social media post. And while you're at it, don't forget to check out our ideas for the perfect brother-in-law gift to make his day special.
In this article:
- What to Write in a Brother-in-Law's Birthday Card
- Funny Birthday Wishes for a Brother-in-Law
- Touching Birthday Wishes for a Brother-in-Law
- Short Birthday Wishes for a Brother-in-Law
- Birthday Wishes for a Future Brother-in-Law
- Sample Brother-in-Law Birthday Letter
What to Write in a Brother-in-Law's Birthday Card
When you're trying to figure out what to write in your brother-in-law's birthday card, it's easy to get stuck. The key is to find a message that feels authentic to your relationship. Here are a few simple ways to approach it. First, don't feel pressured to be overly sentimental or write a lengthy letter. Instead, keep it simple and personal. Mention a funny inside joke you share, a hobby you know he loves or a favorite TV show or movie. Referencing something you know he cares about shows you pay attention and makes the message feel more thoughtful than a generic greeting.
Another great way to add a personal touch is to recall a specific memory you share. Maybe it's a funny moment from a family get-together or a time he helped you out. Acknowledging when he went out of his way to be kind shows your appreciation and makes the birthday message feel genuine. Ultimately, the best birthday wish for your brother-in-law comes from the heart, whether you go with a funny quip or a more heartfelt sentiment. And feel free to ask your spouse or sibling for advice!
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Funny Birthday Wishes for a Brother-in-Law
Graphic: Natalie Romine
If you and your brother-in-law share a good-natured, joking relationship, make your birthday message funny. Consider poking fun at your spouse or sibling, referencing an inside joke or playfully teasing your BIL about getting older. One of these light-hearted birthday messages for your brother-in-law will get you both smiling.
- I'm glad my sibling chose to marry you. I'm not so sure I would have! Happy Birthday, bro.
- Happy Birthday! I was going to get you something great, but then I remembered you already have the best gift: me as your in-law.
- Happy Birthday to the man who voluntarily joined our crazy family. You're a true hero in my book!
- There's no easy way to say this, but you're getting old. Thankfully, you're aging like a fine wine.
- Here's to another year of surviving my sibling. Drinks are on me to celebrate!
- Happy Birthday! I hope you get all the beer, cake and video-game binging your heart desires.
- Happy Birthday, brother-in-law! You're the best thing that's happened to this family since…well, me.
- Happy Birthday to my favorite in-law! (But don't tell the others.)
- We may not have been raised together, but we've perfected the art of drinking together. Happy Birthday!
- Happy Birthday to someone who understands what I go through at family gatherings.
- You've officially reached the age where your back goes out more than you do.
- Happy Birthday! Thanks for being the brother-in-law I can always count on... to finish off the pizza, cake or beer.
- We may not have a lot in common, but we both know that our spouses are the best—and sometimes the worst. Happy Birthday!
- I hope your birthday is filled with all the things you love…and none of the chores your spouse wants you to do.
- Before I knew you, I never had a brother. And now that I have you as a bro-in-law, I'm pretty sure I don't want another one... because nobody else could be as cool as you are, obviously! Happy Birthday!
Touching Birthday Wishes for a Brother-in-Law
Graphic: Natalie Romine
Looking for heart-touching birthday wishes for your brother-in-law? There are plenty of thoughtful phrases to express your gratitude, and let him know how wonderful it has been to have him in the family.
- I would have chosen you as a brother even if my sibling hadn't married you. Here's to another great year!
- Thank you for being the brother I never had. We are so lucky to have you in our lives. Happy Birthday!
- When you married my sibling, they gained a husband and I gained a brother. Here's to another year of laughs and great memories.
- I couldn't have asked for a better addition to our family. Happy Birthday to the best brother-in-law!
- We may not be siblings by blood, but there's never been a doubt in my mind that you're family. Wishing you a blessed birthday.
- Happy Birthday to my wonderful brother-in-law! You're not just family. You're a true friend.
- Thank you for always going above and beyond to make me feel included. You're a reliable friend and a great brother-in-law. Happy Birthday!
- To my brother-in-law, a man of integrity, kindness and humor. Our family is so much better because you're in it. Happy Birthday!
- I love celebrating the best brother-in-law today. You've brought so much joy into our family.
- Wishing you the happiest of birthdays. May your day be as bright as your optimism, and may your kindness be returned to you tenfold.
Short Birthday Wishes for a Brother-in-Law
Graphic: Natalie Romine
If you and your brother-in-law aren't the sentimental type or you aren't super close, short and sweet is the way to go. A simple birthday greeting for your brother-in-law doesn't have to be general or cold, though. These messages avoid anything too personal, sappy or sarcastic, but are still thoughtful.
- Enjoy your birthday! Beers on me the next time we're together.
- So glad to have a brother-in-law like you rounding out the family dynamic. HBD!
- A great brother-in-law deserves a great birthday. Cheers!
- I'm lucky to have a brother-in-law like you. Wishing you the best birthday!
- Another year around the sun. Here's to the best one yet. Happy Birthday!
- I'm so glad to call you family. Happy Birthday, bro-in-law!
- Happy Birthday to my brother-in-law! I hope it's a great one.
- Cheers to another year! Hope your birthday is as awesome as you.
- You're more than an in-law, you're a friend. Happy Birthday, bro!
- Happy Birthday to my favorite person to hang out with in this family.
Birthday Wishes for a Future Brother-in-Law
Graphic: Natalie Romine
To show your future brother-in-law you're excited for him to officially join your family—or for you to officially join his—use one of these birthday wishes.
- Happy Birthday to my soon-to-be brother-in-law! I hope you're excited to get a whole bunch of new family members who are excited to celebrate you.
- I hope your birthday is the second-best celebration of the year—because we all know the wedding is going to be number one!
- Happy Birthday! You're another year older and even closer to officially being part of this crazy family.
- I didn't get you a birthday gift this year because you're getting the gift of me as an in-law. (JK, I hope you like this gift.)
- I could not be more excited to be gaining a brother! Happy Birthday, future bro-in-law!
- Sending birthday wishes and a big virtual hug to my brother-in-law-to-be!
- When I said "yes" to [partner's name], I gained both a lifelong partner and the brother I always wanted. I can't wait to make it official.
- It may not be official just yet, but I just can't wait another year to say "Happy Birthday brother-in-law!"
- Happy Birthday! I hope you know what you're getting yourself into…we're not letting you go now. Welcome to the family!
- Happy birthday, future brother-in-law! I can't wait for all the memories we'll make as a family in the years to come.
Sample Brother-in-Law Birthday Letter
If you're close to your brother-in-law, a short happy birthday message may not be enough. A handwritten letter for your brother-in-law gives you space to share lots of wishes for his new year. Use this sample as a jumping-off point for what to write—or jot it down word for word—he'll never know!
Dear [Brother-in-Law's name],
Happy Birthday to the best brother-in-law!
It's been amazing getting to call you not just family, but a great friend. From giving me advice on what to get your parents for the holidays to being my go-to pickleball partner, it's obvious to everyone, even if I don't say it, that you're my favorite. I'm incredibly grateful for your sense of humor, your unwavering support and the way you always make our family gatherings a little brighter.
I hope you have the best day and an even better year ahead!
Sincerely,
[Your name]
Additional reporting by Shyla Watson
