40th birthday ideas: plans for a partner, a friend or yourself

Good 40th birthday ideas begin with the person who is turning 40, not with a theme from a party shop. Some people light up in a room full of friends and loud music. Others want a train ticket, a slow breakfast or a skill they've never tried. Once you know which kind of day they love, the rest of the planning gets much easier.

An example: a month before Imani turned 40, her friends Grace and Theo had a surprise dinner half booked. Grace asked one last question to be sure, and Imani's answer changed the plan. "I don't want to be the center of a room," she said. "I want to make something with my hands. Something I've never done before." So on the Saturday of her birthday the three of them sat side by side at a pottery class in aprons, with clay up to their wrists. Theo held up his muddy hands and announced that he was hopeless. Imani sat in the middle at the wheel and pulled up a small, thick-walled bowl, laughing the whole time. It sits on her kitchen shelf now and holds her keys. Another friend would have found the same class dull and loved the surprise dinner.

Four questions before you book anything

Ask these about the person, or about yourself if the birthday is yours.

• Does a full room give them energy, or does it tire them out?
• Do they enjoy a surprise, or do they like to know the plan?
• Would they rather stay near home or get away for a while?
• Do they want to look back at the years behind them, or try something new?

The answers usually point to one of the four groups below. If the number itself is on their mind more than the party, turning 40 talks about the decade and how different people take it.

For the friend who wants a big party

A few people want friends from every part of their life in one place, and a 40th is the perfect excuse. These 40th birthday party ideas suit them.

• A decade playlist. Ask each guest for one song tied to a memory with the birthday person, then play them in the order the memories happened.
• Forty memories on a wall. Collect forty short memories on plain cards from friends and family, pin them up and let the guest of honor read them as the evening goes on.
• The year they were born. Food, music and outfits from the year they arrived. It's one of the easiest 40th birthday themes, because guests can dig through old photos for ideas.
• A quiz about the birthday person. Party games for a 40th work best when they're about the guest of honor: the first car, the worst haircut, the city they almost moved to. Mix old friends and new ones on each team.

Memory jars and quizzes carry over well from a going away party, since both evenings are about one person and the people around them.

A surprise 40th birthday party only works for someone who truly loves surprises, so check with their partner or closest friend first.

For the one who would rather slip away

A quiet person often wants a few good hours far from the crowd, and a short trip gives them that.

• A cabin weekend with two or three people, a fire and long walks with no plan.
• A train ride to a town they've talked about for years, with lunch somewhere small.
• A sunrise hike to a viewpoint, with breakfast in a backpack and a thermos of coffee.
• A night by the sea, a long dinner and an early night.

For the one who wants no fuss at all

Some people would rather skip the whole thing. You can still mark the day without making them the center of attention.

• A long breakfast at their favorite café with one or two friends.
• Their favorite meal, cooked at home, for the people they would pick.
• A handful of letters from old friends, given in one envelope instead of a party.
• One well-made thing they've wanted for ages, like a good jacket or a proper set of knives.
• Taking a chore they dread off their hands, so the whole Saturday is theirs.

For the one who wants to try something new

For these friends, the best things to do for a 40th birthday are firsts, like Imani's pottery class.

• A pottery, woodworking or bread-making class.
• A cooking class for a cuisine they love to eat but never make.
• A hot-air balloon ride at dawn.
• A first sailing or surfing lesson.
• A dance lesson for the two of you.
• A night of stargazing far from the city lights.

If they want to keep going, bucket list ideas sorts bigger plans by the kind of person you are.

40th birthday ideas by budget

A 40th feels special because of the thought behind it, whatever it costs.

Almost free. A picnic where you first met, a playlist of forty songs, a jar of forty memories from friends, or a walk to a view with a flask of tea.

A small budget. A class for two, a homemade dinner for six, a day trip by train or tickets to a show they would never buy for themselves.

A bigger budget. A weekend away, a balloon ride, a rented room for the party, or a trip with a group of old friends.

Ways to mark your own 40th

If the birthday is yours, you get to pick.

• Invite only the people you want, and nobody out of duty.
• Spend one whole day alone doing exactly what you like.
• Do one small brave thing, like a first solo trip or a first swim in the sea in spring.
• Plant a tree you can watch grow over the next ten years.

If you moved recently, a housewarming party can double as your birthday, so friends see the new place and celebrate you on the same night.

Matching the plan to their type

People with the same type often want a similar kind of day, though there's always room for surprise. Here are eight of the 16 types.

• Ideator: a mystery day. Hand them an envelope with the first stop inside and keep the rest a secret.
• Vitalizer: the big party, with music, food and everyone they know. They may want to help host it.
• Analyst: a calm trip with something interesting at the end, like an observatory, and a plan they've seen in advance.
• Inspector: a well-organized day that starts on time and holds no surprises.
• Commander: a challenge with a finish line, such as a climb, a race or a day on a windy lake.
• Dreamer: a slow day somewhere beautiful, with a sunrise and two or three close people.
• Guardian: a home-cooked dinner for their nearest few and one heartfelt letter.
• Encourager: a class or an event full of new faces, where everybody joins in.

A quick word on 50th birthday ideas

Most of these plans work just as well ten years later. At 50, many people want the old friends back around one table, the trip they keep putting off, or the class they always meant to take. The same four questions still work. If you're the one planning, 50th birthday party ideas sorts the plans by who's throwing the party. For a parent turning seventy who still wants an adventure, see our 70th birthday party ideas.

Match the 40th to your friend's type

A milestone birthday works best when the plan fits the person turning 40, and their type tells you a lot about which kind of day that is. Begin with your own type on the free friendship compatibility test. Your result page gives you a link for the birthday friend, who takes the same test. Once they have done it, you and the birthday friend both see the relationship type your friendship has.

Questions people ask

How do you celebrate a 40th birthday?

Start with what the person enjoys. A big party suits someone who loves company, while a quiet trip, a long breakfast or a first try at something new suits others.

What is a good theme for a 40th birthday party?

The year they were born is easy and fun, because guests can bring music and outfits from that time. A decade playlist or a wall of forty memories from friends also works well.

What can you do for a 40th if they don't want a party?

Keep it small. Cook their favorite meal, take them to breakfast, or gather a few letters from old friends. Taking a chore off their hands for the day is a gift too.

What are good 40th birthday ideas for him or her?

The same rule works for a husband, a wife or a best friend. Think about how they spend a good day and plan to match. For a partner, pair the plan with one of these birthday wishes for a husband or wife.

Should a 40th birthday party be a surprise?

Only if the person truly enjoys surprises. Ask their partner or closest friend first. Many people prefer to know the plan so they can look forward to it.

What can you do for a 30th birthday?

The same four questions work at 30. Many people want a trip with close friends, a dinner that brings old and new friends together, or a first try at something they keep putting off.

Written by Virko Kask, founder of Typeza
Written with the help of AI tools.