34 Best 40th Birthday Captions for Reaching a Major Milestone

40th birthday captions for instagram


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Gasp ... It's the big 4-0! You made it — congrats!  

How does it feel? Well, actually, I know what you're going to say. “It feels old” — right?

The truth is, 40 is the new 30 these days.

Unlike the generation before us, everybody's buying houses, getting married, and starting families later in life. And this is good news because it means that there isn't as much pressure on us to settle down at a young age.

In other words, don't feel bad if you're not quite where you thought you'd be earlier in life.

Continue to enjoy your forties just as much as you enjoyed your thirties. And don't forget to welcome the milestone of 40 by posting photos or videos of your monumental celebration on Instagram.


Why You Need These 40th Birthday Captions

Let's be honest, making an obligatory social media post with a clever and/or heartfelt Instagram caption is a must for your 40th.

After all, it means that you can:

  • Keep your birthday photos in a safe place online
  • Look back on the memories and remember them forever
  • Attract the attention of new and existing followers to receive even more well-wishes and birthday love!

And I've got an awesome collection of 40th birthday captions for every type of mood and message you'd like to create.

Short and Simple 40th Birthday Captions for Instagram

  • 40 and fabulous.
  • Look who's 40!
  • This is 40.
  • And just like that ... I'm 40!
  • 40 years of being alive.
  • Cheers to 40 years.
  • Officially left my thirties behind.
  • Guess who's 40...
  • Fortylicious.
  • Let's do this 40!


Silly and Sassy 30th Birthday Captions

  • 40 looks good on me. Just sayin'.
  • Kissing my thirties goodbye.
  • Getting older but my inner child is ageless.
  • Looks 18, feels 14, acts 8 ... that makes me 40.
  • Aged 40 years ... I'm officially vintage.
  • The first 40 years of childhood are always the hardest.
  • 40 years never looked this fine.
  • Age only matters if you're a cheese.
  • Just turning 20 twice.
  • Keep calm, 40 is the new 20.
  • Naughty forties, let's go!
  • Aged to perfection.
  • Fierce, fabulous, and 40!
  • The best part of being 40? We did most of our stupid stuff before the internet.
  • Forty is fine when you look 29.
  • I'm now 14,611 days old, 350,664 hours old or 21,039840 minutes old — but who's counting?
  • 18 with 22 years of experience.


Genuine and Emotional 40th Birthday Captions

  • Life really does begin at 40. Up until then, you're just doing research.
  • I can't believe I've been in this body for 40 years. It's gotten me through some tough times!
  • 40 and renewed.
  • Thankful, grateful, and 40!
  • Blossoming into 40.
  • 40 is the new 30. Life starts here.
  • Life is a book and I've heard that your forties are the chapters when it all starts making sense...

Here's to Four Decades of Being Awesome

As you head into a brand-new decade, take everything you've learned about life and leave any negativity behind.

Given that getting older only reminds you that your days are numbered, we need to make the most of our days while we still can!


And what better way to do this than to celebrate in style and show the world just how much you're living life to the fullest? You could also include related hashtags in your birthday Instagram posts or repurpose them for TikTok to get even more attention.

Either way, you've got this! Wishing you the happiest of 40th birthdays!


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