What to Write in a Father's Day Card for Father-in-Law

What to Write in a Father's Day Card for Father-in-Law

Father’s Day isn’t just for your own dad—it’s a great opportunity to show your father-in-law how much he means to you, too. Whether your relationship is warm and close, or more 'bonded over Sunday roasts and polite banter,' a thoughtful message can go a long way.

Here are some message ideas that cover the sweet, the funny, and everything in between.

Sweet & Sentimental

These messages strike the right balance—genuine, thoughtful, and kind, without feeling too over-the-top. They’re great for letting your father-in-law know you care, especially if you’re not the gushy type.

• Thank you for welcoming me into your family with open arms.
• You’ve been like a second dad to me—and that means more than I can say.
• Wishing you a Father’s Day filled with everything (and everyone) you love.

Funny, Jokes, Playful or Happy

Not every card has to be serious. If your relationship includes laughs, banter, or a shared fondness for bad puns, these light-hearted lines are a fun way to say Happy Father’s Day.

• Happy Father’s Day to my bonus dad—cheers for not making the scary in-law thing a thing.
• Thanks for pretending to laugh at my jokes. I know it’s out of love.
• You’re not bad for an in-law. Actually, you’re kind of great.

Rude, Cheeky or Sarcastic

These tongue-in-cheek messages work best for father-in-laws who appreciate a little sass. Just enough sarcasm to make him chuckle, and still feel the love behind the lines.

• Congrats on raising the love of my life. I’ll try not to ruin your hard work.
• Happy Father’s Day! Thanks for not disowning me (yet).
• You're the best father-in-law I've ever had. Top of a very short list.

Short & Simple

Sometimes less is more. These short messages are warm, uncomplicated, and perfect if you want to say something kind without writing a novel.

• Happy Father’s Day!
• Wishing you a relaxing, well-fed day.
• Grateful for you today and always.

Personalised Message Ideas

If you’ve shared a moment, a tradition, or even just a regular Sunday roast, these messages let you add that personal flair. It’s a simple way to show genuine appreciation.

• I’ll always appreciate how welcome you made me feel from day one.
• Sunday dinners at yours are always the highlight of the week.
• You’ve taught me a lot—whether you realised it or not.

Optional Extras

Love Messages, Poems or Quotes:

• "Fathers-in-law are dads without the pressure."
• "Family isn’t always blood—it’s love and loyalty."
• "Thanks for being someone I can always count on."

Short Messages in Other Languages:

• French: Bonne Fête des Pères au meilleur beau-père !
• Spanish: ¡Feliz Día del Padre al mejor suegro!
• Polish: Wszystkiego najlepszego z okazji Dnia Ojca, teściu!

Something Like a Dad

When your father-in-law feels more like a second dad, it’s worth acknowledging the bond you’ve built. These heartfelt messages go beyond formalities to reflect real connection and respect.

• I’m lucky to have a father-in-law who feels more like a dad.
• You’ve supported me more than you had to—and I’ll always be grateful.
• Thanks for being someone I can count on, laugh with, and look up to.

Need a card that says it just right? Explore our Father’s Day collection for Father-in-Law cards here.