A kids' birthday party checklist: the six-week countdown

Plan a children’s birthday party backwards from the day: six weeks out fix the date, book the venue and settle how many children you’re having; four weeks out send the invitations with a clear finish time and a named RSVP date; two weeks out chase the stragglers and check allergies and dietary needs; the week before confirm numbers and shop. On the day, run a simple order — play, food, cake, home. Most parties for primary-age children last about two hours with twelve to twenty guests, and nearly all of the work above is planning rather than doing, which is why it quietly lands on one parent unless you split it on purpose.

How long, how many, and roughly what it costs

Getting these three right at the start saves most of the stress later.

Length, by age:

• Under 3 — an hour, maybe 75 minutes. Parents stay. Any longer and you’re managing meltdowns, not a party.
• 3 to 5 — 90 minutes, which is the standard slot at most soft-play centres.
• 5 to 8 — two hours. The classic hall party with an entertainer or games.
• 9 to 11 — two to three hours, and activity-led: bowling, climbing, cinema, a football session.
• 12+ — fewer guests, later in the day, and they’ll want you visible but not involved.

Numbers. The old rule of thumb is your child’s age plus one, which works beautifully for pre-schoolers and is ignored by every Reception class in the country. Check your school’s policy: many ask that if invitations go through book bags, the whole class is invited — so it’s everyone, or you hand them out privately. A whole-class party means 30 invitations and perhaps 15 to 20 who come. At home, a dozen children is the honest ceiling for most houses.

Money. A village or church hall commonly runs £15–£40 an hour. Venue packages are priced per child, often £15–£25 a head with food, usually with a minimum number. An entertainer is often £150–£250 for the hour. Agree a ceiling out loud with the other adult now, before anyone has emotionally committed to the unicorn cake.

Six weeks out

• Pick the date. Check term dates, INSET days, and the two or three families whose children absolutely must be there. Saturday mornings are the most contested slot in the calendar.
• Book the venue. Halls and soft play go early in party season; autumn term and the run-up to the summer holidays are the pinch points.
• Book the entertainer or activity if you want one. Good ones go months ahead.
• Decide the shape of it. At home is cheapest and by far the most work. A hall is a blank slate: cheap, but you supply everything, including someone to sweep it afterwards. A venue package costs most and removes almost all the labour, which is a legitimate thing to pay for.

Four weeks out

• Send the invitations. They need: the child’s name, the date, the start time and the finish time, the full address with a postcode, whether parents stay, what to wear (fancy dress, old clothes, socks for soft play), an RSVP date, and a line asking about allergies or dietary needs.
• Use the class WhatsApp group properly. One clear message beats thirty paper invitations and gets you replies you can count. Post the details as text, not only as a photo of an invitation, so people can copy the address. Keep paper ones for children whose parents aren’t in the group.
• Give a named RSVP deadline. “Let me know by Friday the 12th” gets answers. “Let me know” does not.
• Say plainly whether it’s a drop-off. Under 5, parents almost always stay. From about six, drop-off is normal — say so, give a mobile number, and state the time to come back.
• Order the cake, or block out the evening you’ll be making it.

Two weeks out

• Chase the RSVPs. Expect silence from a fair few. One friendly nudge in the group chat converts most of it; after that, plan for the numbers you have.
• Do the allergy and dietary check properly. Ask each parent directly rather than relying on what you half-remember from a play date. Simplest is a nut-free party by default, with the food labelled and the original packaging kept so a parent can read it themselves. Where a child has a serious allergy, ask their parent what they’d like you to do — many would rather stay, and that’s worth accepting without making it awkward. Give vegetarian, halal and dairy-free options their own plates, not the picked-over remains of the sandwich tray.
• Buy the party bags now, not in a supermarket at 9pm the night before.
• Plan the games and write them down. Musical statues, pass the parcel with a small thing in every other layer, and a treasure hunt will carry half an hour between them.

The week before

• Confirm final numbers with the venue or caterer — most want them three to seven days out.
• Shop the non-perishables: bags, balloons, candles, matches, bin bags, kitchen roll, plates, wipes, and a spare wrapped present in case a child arrives empty-handed and notices.
• Write the running order and stick it on the fridge.
• Split the day itself between the adults. One takes the door and the guest list, one the food, one cake and candles, one photos, one the bins and the bags at the end. Decide now, not at 2pm on the day.

The day: a running order for a two-hour party

• 0:00–0:20 Arrivals. One adult on the door with the list, one pile for coats, one box for presents.
• 0:20–0:50 Games or the entertainer’s first half.
• 0:50–1:10 Food. Feed them before the cake, not after.
• 1:10–1:20 Cake and candles. Cut it, then bag the slices in napkins to go home.
• 1:20–1:50 More play, or the second half.
• 1:50–2:00 Bags at the door as parents arrive.

Two things that save you afterwards: note who gave which present as it’s opened, and have the birthday child write short thank-yous within the week, in their own handwriting, however wobbly.

Party bags, without the arms race

Nobody has ever been thanked for five pieces of moulded plastic. Two or three pounds a bag is plenty: one decent thing — a paperback, felt tips, a bag of sweets — plus the slice of cake. If your child is old enough to help fill them, that’s a real job they can own.

The planning is the work, and it usually lands on one person

Count the discrete jobs in this guide and you’ll pass thirty. Almost none are physical. They’re remembering the RSVP deadline, holding in your head which child can’t have dairy, and knowing the hall needs sweeping before the deposit comes back. That’s the invisible labour that makes one parent the default parent — and a birthday is where it peaks.

Split it by chunk rather than by task. One adult owns invitations, RSVPs and the allergy list; the other owns food, cake and the shopping; the day itself gets divided as above. Then put the deadlines somewhere you can both see them, in one shared family calendar rather than one person’s memory.

Rather than build that list from scratch, Equal House has a party planner that suggests gift ideas and turns the plan into a dated chain of tasks — invitations, present, cake, lifts — shared between both adults instead of absorbed by one.

The bottom line

A children’s party is not one big job; it is thirty small ones spread over six weeks. Fix the date and the numbers early, invite four weeks out with a real deadline, check allergies properly, keep it to two hours, and decide who owns which chunk before the week of. Do that and the day itself is the easy part.