Party budget calculator

Split a total budget across seven categories, adjust one line, and watch the others rebalance.

Most party budgets do not fail at the total. They fail at the split: the venue swallows a third of the money before food is booked, or the decor line quietly grows until the photographer has to be cut. Writing the split down before you get quotes is what makes the quotes comparable.

This calculator takes one total, divides it into seven categories, and keeps the percentages at exactly 100% however you edit them. It also shows the cost per guest, which is the number that tells you fastest whether the plan fits the guest list you have.

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Your budget

$

The most you are willing to spend in total.

Used only for the cost-per-guest figure.

Loads that event type's starting split.

The split

Percentages total 100%

%

$4,500$30 per guest

%

$5,400$36 per guest

%

$2,160$14.4 per guest

%

$1,800$12 per guest

%

$900$6 per guest

%

$1,800$12 per guest

%

$1,440$9.6 per guest

Your budget breakdown

Amount per category

Venue (25%)$4,500
Food and drink (30%)$5,400
Decor and flowers (12%)$2,160
Entertainment (10%)$1,800
Invitations (5%)$900
Photo and video (10%)$1,800
Contingency (8%)$1,440

Total

$18,000

Across 150 guests

Cost per guest

$120

Budget divided by guests — the number venues ask for first.

Editing one row redistributes the rest proportionally so the total always stays at 100%. Amounts are rounded to the cent, so the seven rows add up to the budget you entered.

How to use it

  1. 1Enter the total you are willing to spend, not the total you hope to spend. The budget is the constraint, so start with the constraint.
  2. 2Pick the event type to load a starting split. A wedding and a corporate reception spend very different shares on venue and food.
  3. 3Drag or type a percentage in any row. The other rows give way proportionally, so the column always totals 100.
  4. 4Read the amount column as your ceiling for each category and take it to suppliers as a brief.
  5. 5Check the cost-per-guest figure against your guest count. If it looks impossible, change the guest count or the total before you start requesting quotes.

How the maths works

Each row's amount is the total multiplied by that row's percentage. When you edit a percentage, the remainder is redistributed across the other rows in proportion to their current values, using whole percentages and a largest-remainder step so the column can never land on 99% or 101%.

That is deliberate. A tool that silently rescales your own entry, or that leaves a stray 1% unassigned, produces a budget that does not add up — and a budget that does not add up is the first thing a partner or a committee notices.

Amounts are rounded to the cent, so the category rows add up to the total you entered. The cost per guest divides the total by the guest count; it includes every category, including contingency, because that money is still being spent on the event.

  • Category amount = total budget × category percentage
  • Cost per guest = total budget ÷ number of guests
  • Percentages are whole numbers and always total exactly 100
  • The split is a starting point, not a market rate — your city and venue will move it

A worked example

A wedding with an $18,000 total budget for 150 guests, using the default wedding split:

Venue (25%)
$4,500
Food and drink (30%)
$5,400
Decor and flowers (12%)
$2,160
Entertainment (10%)
$1,800
Invitations (5%)
$900
Photo and video (10%)
$1,800
Contingency (8%)
$1,440
Cost per guest
$120

Raise venue to 35% and the other six rows shrink proportionally to fill the remaining 65%; the total stays at $18,000 and nothing is silently dropped. Contingency is the row to protect — if it drops below 5%, the tool flags it, because deposits and delivery fees are where budgets usually break.

Frequently asked questions

How much of a party budget should be contingency?

Plan 8–10% for a wedding or a large party, and no less than 5% for a small gathering. Contingency covers the things that arrive after the quotes: service charges, delivery, overtime for staff, a last-minute guest count increase, or a tax line that was quoted separately.

Why does my percentage change when I edit another row?

Because the split must total 100%. When you increase one category, the remaining categories are scaled down in proportion to their current values, so the shape of the rest of the budget is preserved. If you would rather type both numbers yourself, set the value and then adjust the row that gave way.

Does the cost per guest include everything?

It divides the whole budget by the guest count, so it includes venue, food, decor, entertainment, invitations, photo and video, and contingency. It is the average spend per person, not a price per head — a caterer's per-person rate covers food and service only.

What if my quotes already add up to more than the budget?

Enter the real total first, so the calculator shows the split you can actually afford, then compare each category ceiling with the quote in front of you. The gap between the two is the negotiation — usually on the venue or the food line, which together are more than half of a typical wedding budget.

Should invitations be 5% of the budget?

For printed invitations, 3–5% is a normal share, and digital invitations can be a fraction of that because there is no printing, postage or envelope calligraphy to pay for. If you are sending paper to part of the list and links to the rest, split the row and treat each half separately.

Ready to send the invitation itself?

InviteVia turns your plan into a digital invitation with RSVP collection, guest messaging and a link you can share or print as a QR code.

These figures are planning rules of thumb, not quotes or guarantees. Rates are editable defaults, and your venue or caterer may use different ones — treat the output as a starting point for a conversation. Nothing you type is uploaded or stored.