How to Plan a Year 12 Formal on Different Budgets

Six friends can all be going to the same Year 12 formal and still have completely different ideas of what the night should cost. One might be happy spending $100 on dinner and transport; another might have $30 left after paying for the formal itself. If the group says, “We’ll just split everything equally,” the maths looks tidy, but the plan can become uncomfortable very quickly.

The short answer is to agree on a low-cost shared plan first, then make expensive extras opt-in. Photos, dinner, hired cars, beauty appointments, and after-formal activities do not all need to be part of one giant group bill.

The useful rule is simple: split a cost among the people who agreed to use it, unless the group has explicitly agreed to treat it as a shared cost. Make the price visible before anyone books. Give people a genuine way to say no.

01Start with the part that actually causes arguments

The tricky bit is usually not the formal itself. It is everything that grows around it.

You start with a formal ticket. Then someone suggests professional photos. Someone else finds a nicer restaurant. Someone wants a limo. Another person suggests an activity afterwards. Suddenly a plan that sounded like “photos and dinner” has become several hundred dollars.

Before you agree to anything, ask the group to separate the costs.

This first model is useful, but there is one extra layer of precision: is the cost fixed or does it change with each person?

A restaurant meal might cost $45 per person. A photographer might charge $120 for the whole group. A six-person car might cost $150 whether five people or six people use it.

That difference changes the maths.

Think about a pizza order. It would be strange to charge the person who ordered one slice the same as the person who ordered half the pizza. But a group photo package is not a pizza: the photographer may charge one fixed price for the whole session. The analogy breaks there.

So don’t use “equal” as your definition of fair. Work out what the actual cost is, who uses it, and what everyone agreed to.

02Give everyone a budget boundary, not a budget interrogation

Some students will be paying for the formal themselves. Some will have family help. Some will have other expenses competing for the same money.

You don’t need to know which is which.

Instead of asking, “How much can you afford?”, ask something like:

“I’m trying to keep the group plan flexible. Is there a maximum you’d be comfortable spending on the shared extras?”

If possible, let people answer the organiser privately. A budget is personal information, not a group discussion topic.

A useful phrase is: a spending cap is not a target.

If someone says they are comfortable spending up to $60, that doesn’t mean you should find a way to spend $60.

If the formal itself is becoming financially difficult, talk to a parent or carer, year adviser, welfare staff member, or another trusted adult about what options are available. Schools handle these situations differently, so ask rather than assuming there is or isn’t support.

03Check the school’s rules before making promises

This comes before the budget.

Check the formal information from your school for things such as:

• whether guests are allowed,
• whether guests need approval,
• how many guests each student can bring,
• arrival and departure requirements,
• photography rules,
• venue restrictions,
• transport requirements, and
• behaviour or supervision rules.

If you’re at a NSW public school, the current Student Code of Conduct applies to school activities both on and off the school site, with expectations around respect, responsibility, safety, and following staff directions. :chatgpt-content-reference{index=”0″} Your school’s own formal instructions may add more specific requirements.

Don’t promise a friend, guest, photographer, driver, or restaurant arrangement until you know the relevant rule.

04A decision order that prevents most problems

Don’t decide everything at once in a chaotic group chat. Work through the decisions in this order.

1. Check the school rules. Know what is actually allowed.
2. Decide what the shared core is. Keep this to things most people genuinely want.
3. Get budget boundaries. Do this privately if people are uncomfortable discussing money publicly.
4. Sort out the guest list. Guest numbers can change capacity and costs.
5. Price the core plan. Write down the total and per-person amount.
6. Add extras one at a time. Dinner, limo, activity, photo upgrades, and similar costs should each have their own opt-in.
7. Get final agreement before booking. No surprise bookings followed by “Can everyone transfer me $80?”
8. Write down the fallback plan. Decide what happens if someone cancels, the weather changes, or the price changes.

The order matters because later decisions depend on earlier ones.

For example, there is no point arguing about which limo to book before knowing whether the school permits the arrangement, how many people are actually travelling, and who is willing to pay for it.

05Use a one-screen shared-cost checklist

A shared note or message can be enough. You don’t need a financial-management system worthy of a small corporation.

For every shared cost, record:

• [ ] What is the item?
• [ ] Is the cost fixed or per person?
• [ ] Is it core or optional?
• [ ] Who has opted in?
• [ ] What is the total price, including known fees?
• [ ] What is each person’s share?
• [ ] Is there a deposit?
• [ ] Is the deposit refundable?
• [ ] Who is paying upfront?
• [ ] When does everyone need to pay them back?
• [ ] What happens if someone cancels?
• [ ] Does the cost change if the group size changes?
• [ ] Has the school or venue rule been checked?

The last few questions are where many group plans fall apart.

Someone dropping out of a $40 individual dinner is simple. Someone dropping out of a $180 vehicle booking is not.

06Photos: share the memory without forcing everyone to buy the same package

Photos are a particularly easy place for costs to become awkward because the group may care about the photos more than it cares about the professional package.

Suppose a photographer charges $120 for six students.

If all six opt in, that’s $20 each.

If only four want the package, it becomes $30 each.

Neither number is “the fair price”. They are simply the prices produced by the same fixed cost and different numbers of buyers.

If someone doesn’t want to pay for the professional package but would like to appear in a group photo, ask the photographer what their inclusion actually changes. If adding them costs nothing, don’t invent a charge just because they didn’t buy the package.

There are also cheaper ways to create a shared photo moment:

• meet at an agreed location and use a phone tripod,
• take group photos before the formal,
• choose one location rather than travelling between several,
• ask whether a shorter photography package is available, or
• make the professional session optional while everyone still meets for free photos.

Check that the location and photography arrangements are allowed.

The goal is not to make every part of the night cheap. It is to avoid making the expensive option the price of admission to the friendship.

07Meals: make the menu flexible when budgets are different

Dinner gets awkward when one person is ordering a $25 meal and another is looking at a $70 steak, then someone suggests splitting the entire bill.

If budgets vary, an à la carte restaurant or casual venue is often easier than a fixed-price menu. People can choose what works for them.

If the group really wants a set menu, be honest about the price before booking. If someone can’t comfortably pay it, they should be able to skip that dinner and join the group at another part of the night if the logistics allow.

You can also separate the social event from the meal.

For example:

• everyone meets for photos,
• some people have the full restaurant dinner,
• others eat beforehand,
• everyone meets again at the formal.

That can feel much better than creating a “cheap table” and an “expensive table”, where someone’s budget becomes visible to everyone.

If food preferences or dietary needs are involved, check the venue before booking rather than assuming someone can just find something on the menu.

08Transport: cheapest is not the only variable

A $10 train trip is cheaper than a $40 hired car, but price isn’t the only consideration.

Think about:

• safety,
• arrival time,
• return arrangements,
• how many people can travel together,
• who is responsible for organising the booking,
• whether the school or venue has relevant requirements, and
• whether everyone is actually using the transport.

If six people hire a $120 vehicle and all six use it, the natural share is $20 each.

If four people use it, the default share is $30 each.

But there is an important exception: sometimes a person is not in the vehicle but the group has explicitly agreed to treat the booking as a shared cost. That can be fair too. The key is that it should be an agreement made before booking, not a surprise bill afterwards.

09How to invite people without making “no” awkward

A good invitation does three things:

1. says what the activity costs,
2. separates optional extras from the main plan, and
3. makes declining socially safe.

Try:

Hey everyone! I’m keen to organise a simple plan for the formal. I’m thinking we make the group photos and getting to the formal the shared plan, then dinner and any activities can be optional. If you want to skip an extra, absolutely no worries – you can still be part of the photos and meet us at the formal. If you’re in for something, just let me know which bits, and we’ll only split those costs between the people doing them. No explanation needed if you’d rather keep things cheaper.

Notice what this avoids.

It doesn’t say, “Who can’t afford dinner?”

It doesn’t say, “It’s only another $40.”

It doesn’t make someone defend their family circumstances in front of their friends.

And it doesn’t make opting out sound like opting out of the friendship.

If you’re also dealing with friends whose study time and social priorities are pulling in different directions, How to Stay Friends When Your HSC Priorities Are Different covers the same broader problem from another angle.

10Guest-list disagreements need two separate decisions

A guest disagreement often becomes messy because people mix up two questions:

Who is allowed to come?

Who is paying for what?

Deal with them separately.

If the school has a guest limit or approval process, that comes first. Don’t negotiate around it in the group chat.

If students have individual guest invitations, one person’s guest doesn’t automatically become the financial responsibility of the whole group. If the guest uses a shared photo package or transport booking, decide how their share will be handled before the booking is made.

If the disagreement is simply, “I don’t like your guest,” ask what the actual issue is.

If the person feels unsafe, threatened, harassed, or seriously uncomfortable, don’t reduce that to a popularity contest. Involve a trusted adult or the appropriate school staff member.

If it is simply two friends wanting different people at a social event, avoid turning the group chat into a vote on someone’s friendship.

A useful question is:

Does this guest change the school’s rules, the booking capacity, the cost, or someone’s safety?

If the answer is no, the disagreement may not need to become a major group decision.

11What to do when the plan changes

The best group plans are not the ones that never change. They’re the ones where changing the plan doesn’t create chaos.

Before anyone has paid

This is the easiest stage.

Change the restaurant. Drop the limo. Reduce the photo package. Invite fewer people. Change transport.

Nothing has become a sunk cost yet.

After a deposit has been paid

Find out exactly what is non-refundable.

Don’t respond to a $50 deposit by saying, “Well, we’ve already paid, so let’s upgrade everything else.”

A sunk cost is money already committed. It doesn’t automatically make the next expensive decision sensible.

When one person cancels

Ask three questions:

• What cost have we actually lost?
• Can the booking be resized or changed?
• Who had agreed to cover the cost before the cancellation?

Then tell everyone the new amount before asking for more money.

When the weather ruins the plan

If your photos are outdoors, decide the backup location before the day.

A backup might be an indoor location, a shorter photo session, or simply taking photos at the formal venue if permitted.

Don’t wait until everyone is dressed up and standing in the rain to discover that the replacement studio costs twice as much.

12Inclusive alternatives that still feel like part of the night

Being inclusive doesn’t mean every activity has to be free.

It means someone can decline an expensive option without being excluded from the social part.

Some easy alternatives are:

The best alternative is often not a “cheaper version” of the expensive activity. Sometimes it is a different activity that gives people the same social experience.

For example, if the important part of a limo is travelling together and talking before the formal, a group meeting point and shared public transport might provide the social part without the large vehicle cost, provided the transport is safe and allowed.

13Keep the organiser from becoming everyone’s unpaid bank

One person often ends up doing the booking.

That’s fine until they have paid $600 upfront and are sending messages three weeks later asking, “Can everyone please transfer me?”

Before booking, write down:

The numbers will change for your actual group. The structure is what matters.

If the organiser has to pay a deposit, make sure everyone knows the deposit amount and cancellation conditions first.

And if someone changes their mind, update the table. Don’t keep calculating from an old version of the group.

14A simple rule for this week

If your formal plans are currently a mess, don’t try to solve every disagreement at once.

Make one shared note with:

Core plan: what everyone can reasonably join.

Optional extras: what people can choose separately.

Cost: the exact amount or best current estimate.

People: who has opted in.

Deadline: when a decision or payment is actually needed.

Then send the group one clear message.

That is enough to turn “What are we doing for the formal?” into an actual plan.

15Questions and solutions

Question 1

Six students all agree to buy a fixed-price group photo package costing $120.

How much should each student pay if they are the only people paying for the package?

Solution 1

Each student pays $20.

The package is a fixed $120 cost shared by six agreed users:

\[ \frac{\$120}{6} = \$20 \]

The important point is that the $120 is the cost of the package, not a $120 cost attached separately to every student.

If a seventh person later wants to join and the photographer confirms there is no extra charge, the group should not automatically keep charging the original six $20 and make the seventh person pay something arbitrary. Recalculate based on what the provider actually charges and who agreed to the package.

Question 2

Six friends agree to a group photo package costing $120 and a minibus costing $90. All six use both.

Four students also choose a $42 dinner, and two students choose an $18 activity. One of those two activity students also goes to dinner.

Assume the group has agreed that each optional cost is paid only by the people using it.

Find the cost for a student who:

• chooses neither optional extra,
• chooses dinner only,
• chooses the activity only, or
• chooses both extras.

Then calculate what everyone would pay if the entire $414 cost were simply split equally. Explain why the two methods give different results.

Solution 2

The user-based costs are $35, $77, $53, and $95, while an equal split of the whole plan would be $69 each.

First calculate the shared core:

\[ \frac{\$120}{6} = \$20 \]

for photos, and

\[ \frac{\$90}{6} = \$15 \]

for transport.

So every student in the core plan pays:

\[ \$20 + \$15 = \$35 \]

Now add the optional costs.

• Neither extra: $35
• Dinner only: $35 + $42 = $77
• Activity only: $35 + $18 = $53
• Both: $35 + $42 + $18 = $95

The total cost is:

\[ \$120 + \$90 + 4(\$42) + 2(\$18) = \$414 \]

An equal split gives:

\[ \frac{\$414}{6} = \$69 \]

The tempting route is to call $69 “fair” because everyone pays the same amount. But that ignores what the group actually agreed to buy.

The student choosing neither extra would pay $69 instead of $35, while the student choosing both would pay $69 instead of $95. Equal payment has transferred money from the person buying less to the person buying more.

An equal split could still be fair if everyone explicitly agreed to treat the whole $414 as a shared experience. It just shouldn’t happen by default.

Question 3

Your group wants to meet for professional photos before the formal. The photos are affordable for everyone, but a proposed dinner afterwards is more expensive, and some students may want to skip it.

Write a short group-chat invitation that makes the dinner genuinely optional without asking anyone to explain their budget.

Solution 3

The best message makes the cost visible, separates the optional dinner from the shared photo plan, and clearly gives people permission to decline.

For example:

Hey everyone! I’m keen to organise photos before the formal, then a few of us are thinking about dinner afterwards. Dinner will be optional, so absolutely no pressure if you’d rather skip it – you can still come to the photos and meet us at the formal. If you’re coming to dinner, just let me know and we’ll only include the people who opt in when we work out the costs.

The tempting mistake is to write, “Who can afford dinner?” That turns a normal planning decision into a public discussion about people’s finances.

The better approach is to make the expensive part optional before anyone has to defend saying no.

Question 4

Four students book a $160 group photo package and a $120 vehicle. All four use both, so they originally plan to pay $70 each.

The school approves a guest. One guest will use both the photos and the vehicle. A second approved guest will use the vehicle but not the photo package.

Assuming nobody is subsidising another person’s costs, how should the $160 photo cost and $120 vehicle cost be divided?

Solution 4

The first guest should pay $56, while the second guest should pay $20. The original four students should each pay $52.

After the first guest joins, five people use the photo package:

\[ \frac{\$160}{5} = \$32 \]

Five people also use the vehicle at this point:

\[ \frac{\$120}{5} = \$24 \]

So each of those five people pays:

\[ \$32 + \$24 = \$56 \]

Now the second guest joins the vehicle but not the photos.

The vehicle has six users:

\[ \frac{\$120}{6} = \$20 \]

The photo package still has five users, so its share remains $32.

Therefore:

• Original four students: $32 + $20 = $52 each
• First guest, using both: $52
• Second guest, using transport only: $20

The tempting route is to keep the original $70 split because “the four people booked it”. But the booking is a fixed cost, and the group has now changed who uses each service.

The important constraint is that the two costs behave independently. A person who does not use the photos should not automatically pay for them, while a person who uses the vehicle should contribute to its fixed cost.

Of course, the school must allow the guests before any of this matters.

Question 5

Six friends have maximum budgets for all pre-formal group extras, not including their formal tickets:

• A: $50
• B: $50
• C: $80
• D: $80
• E: $120
• F: $120

Everyone wants the $120 photo package.

There is also a five-seat hired car costing $150 in total. The five car users split that cost equally. Anyone not using the car can take public transport for $8.

Dinner costs $25 per person, and the activity costs $15 per person.

Their preferences are:

• A wants the car and the activity, but not dinner.
• B wants the car, but not dinner or the activity.
• C and D want the car and dinner, but not the activity.
• E and F want the car, dinner, and the activity.

Assume the photo, transport, dinner, and activity prices cannot be changed, and nobody subsidises another person’s optional costs.

Can every stated preference be satisfied while keeping everyone within their budget? If not, what is the smallest change to the preferences that makes the plan work?

Solution 5

No. Every preference cannot be satisfied under those constraints; A must give up the preference for the hired car and use public transport instead.

Start with the fixed photo cost. Everyone uses the package:

\[ \frac{\$120}{6} = \$20 \]

The car costs $150 and has five users, so each car user pays:

\[ \frac{\$150}{5} = \$30 \]

Now look at A.

If A uses the car and the activity, A’s cost is:

\[ \$20 + \$30 + \$15 = \$65 \]

But A’s maximum is $50.

So A cannot simultaneously have the photos, car, and activity.

That is the hinge in the problem. It is easy to look at the car preference and think, “Five people want the car, so we need to find five car users.” But the budgets constrain which five-person combination is possible.

If A switches to public transport, A pays:

\[ \$20 + \$8 + \$15 = \$43 \]

which is within the $50 cap.

B can use the car:

\[ \$20 + \$30 = \$50 \]

C and D can use the car and have dinner:

\[ \$20 + \$30 + \$25 = \$75 \]

which is within their $80 caps.

E and F can use the car, have dinner, and do the activity:

\[ \$20 + \$30 + \$25 + \$15 = \$90 \]

which is within their $120 caps.

So the workable arrangement is:

• A: public transport + photos + activity = $43
• B: car + photos = $50
• C: car + photos + dinner = $75
• D: car + photos + dinner = $75
• E: car + photos + dinner + activity = $90
• F: car + photos + dinner + activity = $90

The five car users are therefore B, C, D, E, and F.

A’s original preference for the car cannot survive the $50 cap if the activity remains $15. The group does not need to abandon the whole plan, and it does not need to make someone else secretly cover A’s shortfall. One transport preference changes, while every other stated preference can remain.

This is the useful lesson for real group planning: when several constraints interact, don’t ask only, “What does everyone want?” Ask, “Which combination of choices can all exist at the same time?”

Once you’ve worked that out, put the final plan in one message: who is in each activity, the exact cost, the payment deadline, and the backup if someone drops out. That turns a vague group decision into something everyone can actually agree to.