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100 Happy 40th Birthday Captions for Yourself and Friends

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If you or someone you know is turning 40, you’ll be on the lookout for a great birthday photo. Once you have it, we have gathered all the best happy 40th birthday captions for your next post.

Now go ahead and browse through to find your favorite 40th birthday caption for Instagram.

Happy 40th Birthday Captions

  • Shoutout to my mama who was in labor 40 years ago.
  • Chapter 40. Time to make some memories.
  • Officially 40, but still mentally about five.
  • So this is where aging ends, right? #Forever40
  • Hip hip hip, hurray! It’s that special day of the year once again.
  • I don’t care how old I’m turning, so long as there’s cake.
  • Ready to start a new decade of adventures.
  • I want to thank everyone for my special 40th birthday, come and join me as I celebrate it.
  • I got you popcorn for your 40th birthday because you’re poppin.
  • Staying 40 until further notice.
  • Today is not for whining, it’s for wining!
  • It took 40 years to get this awesome.
Cupcake with happy 40th birthday captions for yourself
  • I don’t care how old I’m turning, so long as there’s cake.
  • Celebrating your 40th is a piece of cake.
  • Happy 40th birthday. You’re one in a melon.
  • 40 has never looked this good. Happy birthday!
  • 40 is so fun I think I’ll repeat it again next year.
  • I can’t keep calm, it’s my 40th birthday.
  • Of course, I don’t know how to act my age. I’ve never been this age before!
  • I wish myself a happy 40th birthday since I am the definition of awesomeness. Self-love!
  • Have a grate 40th birthday. Hope that’s not too cheesy.
  • Be careful what you wish for… My parents wished for me 40 years ago and look where that ended up.
  • Woke up a little older… but not wiser.
  • I’m just here for the birthday cake.
  • At 40 everything is possible and tomorrow looks friendly.
Fireworks with funny happy 40th birthday Instagram captions
  • Heaven has been really good to me by adding another year to my age.
  • Another year older, but I’ll need some extra time for that ‘wiser’ bit. #40
  • Cheers to another lap around the sun. Hello, 40.
  • 40 & flirty. Happy birthday to me!
  • O.K., you know that what happens at the 40th B-Day, stays at the 40th B-Day.
  • Another year, another candle on the cake. #40
  • Start from the bottom now I am 40.
  • Leveling up my adulting game. 40 and having fun.
  • Made it to 40! I know. I’m as surprised as you are.
  • That birthday glow. #Feeling40
  • It’s my birthday, so I’m celebrating everything.
  • Life’s too short to not celebrate every chance you get! Happy 40th Birthday to me!
  • I have mixed drinks about turning 40.
  • You really gonna scroll without wishing me a happy 40th birthday?
  • I doubt tequila is the answer, but it’s worth a shot.
  • Let’s taco ‘bout your 40th birthday.
  • Cheers and beers to 40 years.
  • You have 40 bottles of beer to drink. I hope you already started.
  • Sending you s’more 40th birthday wishes.
  • After today, I’m celebrating my birthday in dog years.
  • Dim-sum body say it’s your 40th birthday?
  • I’m not getting older. I’m getting better.
Cake with happy 40th birthday friends captions
  • Cheers to the one day of our lives, when we actually celebrate getting old. Happy 40th Birthday to me.
  • POV: You can’t believe I’m 40 now.
  • Here’s to a soup-er 40th birthday!
  • 40 years later and I’m still a hot mess.
  • Birthdays are good for me. The more I have, the longer I live.
  • I’m grateful for life and for growth. I wish myself a happy birthday.
  • On a scale of 1-10, feeling a solid 40.
  • Some only dream of birthday cake, and others bake it happen.
  • Turning 40 is nothing to wine about.
  • Happy Birthday to the smartest person in this world, Happy Birthday to Me!
  • Your 40th birthday cake brings all the boys to the yard.
  • The thing is I love birthday celebrations, but only when they’re mine.
  • It’s my 40th… I’ll wine if I want to.
  • 40 is the age of responsibility. Give it a few months and you will be wondering why you were in such a hurry to get here.
  • 40 looks pretty and good to me.
  • Today is a great day cause it’s my birthday!
  • Just like wine, better with time. #40
  • 40 years later and I’m still a hot mess.
  • You’re 40 years old, but I do not carrot all.
  • Say hello to my new favorite 40 year old.
  • Say hello to the world’s latest 40 year old.
  • 40? Who cares. I just want cake.
  • Say hello to the world’s latest 40 year old.
  • I’m 40 now but age gives no guarantee on maturity.
  • Pop the champagne, because this girl is 40.
  • Yeti or not, it’s your 40th birthday.
  • Celebrating my 2nd 40th birthday today…
  • The only things getting LIT today are the candles on my cake!
  • I’ll enjoy the best of today and laugh like never before because it’s my 40th Birthday.
  • Got so distracted by cake, I forgot it was my own birthday. #SoThisIs40
  • Another year, another candle on the cake. #40
  • Birthday mode: the youngest I’ll ever be, and the oldest I’ve ever been. #40
  • These beauties are the only gift I need. #40
  • Nothing holds a candle to you.
  • Wouldn’t trade it for the world, I’m 40 now.
  • Here’s to another 365 days of being fabulous.
  • 40 – time to make some pour decisions.
  • Your 40th Birthday comes along with great responsibility. You’re responsible for not getting too drunk.
  • 40? Who cares. I just want cake.
  • Only took 40 years to get this cute.
  • Birthday mode: the youngest I’ll ever be, and the oldest I’ve ever been. #40
  • Achievement unlocked: let’s drink! #40
  • Made it to 40! I know. I’m as surprised as you are.
  • Don’t wanna be sappy so… let’s just say 40 is already one for the books.
  • Got so distracted by cake, I forgot it was my own birthday. #SoThisIs40

If you like these, you might also want to check out Birthday CaptionsBirthday WishesFriend Captions and our lists of First21st22nd23rd24th, 25th, 26th, 27th, 28th, 29th, 30th, 31st, 32nd, 33rd, 34th, 35th, 36th, 37th, 38th and 39th birthday captions.

Short Birthday Captions for Turning 40

  • Schoolin’ Life at 40
  • Favorite day of the year. #40
  • Growing and glowing. #40
  • Aging and raging. #40
  • I’m 39 plus one.
  • Season 40, Episode 1.
  • 40 40 40 40 I feel like 40.
  • 40 is still young…er than 41.
  • Oh ship, it’s your 40th!
  • Stay in your birthday magic.
  • Time to par-tea!
  • Experience level: 40.
Cake with short turning 40 Instagram captions
  • Make a wish. #40
  • Hey Siri, count the candles.
  • 4.0.
  • Lap 40 around the sun…
  • 40 is the new 29.
  • 39 no more.
  • So you’re spaghetting older.
  • And so begins Chapter 40.
  • 40, what a time to be alive.
  • Chapter 40, Page 1.
  • Birthday behavior! #40
  • Hello, 40.
  • Aged to perfection.
  • I’m officially the big 4.0.
  • Wow, never been 40 before.
  • Woke up 40 and thriving.
  • Be good to me, 40.
  • Here for cake, and cake only.
  • Yes, I become 40.
  • Well look who just turned 40…
  • Experience level: 40.
  • 40? Bring it on.
  • Wow, never been 40 before.
  • Go ahead, cake my day.
  • Big 40 energy.
  • Chapter 40, Page 1.
  • It’s no time to be 40.
  • You take the cake.
  • Level up. #40
  • Now we start planning for 40!
  • Hello, 40.
  • So this is 40.
  • Hey Siri, count the candles.
  • Talk forty to me.
  • Aged to perfection.
  • To my 40s: ‘Thank u, next’.
  • Staying 40 until further notice.
  • Cheers to 40!
  • Here’s to the next chapter.
  • 40 and glowing.
  • Achievement unlocked: 40.
  • I think 40 looks good on me.
  • Reflecting on my 40th.
  • Made it to Level 40.
  • 40 never felt better.
  • My day, my way.
  • 40: When life truly begins.
  • My day, my way. #40
  • Favorite day of the year. #40
  • Leaping into my 40’s

So that is it for our list of Happy 40th Birthday Captions for Instagram. We hope you found the perfect one for you.

Now go share your birthday photo!

Woman holding up a clear chunk of ice on the beach

About the Author

Laynni Locke

I am Laynni Locke, a Canadian writer, reader and traveller with a passion for sharing life’s moments on social media. Keeping friends and family in the loop of our lives though photos and videos has become an essential activity for most.

And it doesn’t matter if you are travelling, celebrating a special occasion or just appreciating day-to-day life, when you take that perfect photo you are going to need the perfect caption or quote before you share it. Which is why we started Routinely Shares, providing comprehensive lists of quotes and captions to cover every occasion, adventure or loved one.

With extensive experience as a travel writer, social media specialist and grant writer, I have made it my mission to curate the best and easiest to use lists for your next post.

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