Wedding budget calculator

Where the default split comes from

The starting percentages come from the vendor averages in the Zola Wedding Cost Index. We set aside 9% first as a buffer, matching the share of spending Zola's 2026 Wedding Spend Survey found going to hidden costs. The other 91% is split in proportion to Zola's averages.

The result lines up with Zola's own percentages. Venue lands at 16.6% against the 17% Zola quotes. Venue, catering and bar together come to 40.8%, inside its 40 to 45% range.

Treat this as a starting point. Other sources give different numbers: The Knot reported an average venue spend of $12,200 and catering of $80 a plate in its 2025 study. Some venues include food or rentals in their price. If yours does, move the catering share into the venue line.

How to use it

Enter your total and guest count first. Then edit any percent or dollar amount. The unlocked lines rebalance automatically, so your plan always adds up to your budget. When a price is settled, lock that line so it stops moving.

As quotes arrive, type them into the quote column. The plan stays as your target and the calculator compares it with what you have actually been quoted. This matters: Zola reports that 69% of couples exceed their original budget.

A worked example

Say you have $30,000 for 100 guests. That is $300 a guest, close to the $292 The Knot reports. The default plan gives the venue $4,991 and keeps $2,700 as a buffer.

Now the venue quotes $7,000. That is $2,009 over the plan, and the total becomes $32,009. Each guest adds about $116 here, so 17 fewer guests would close the gap by itself, taking you to 83. Or you could keep the guest list and cut the bar style and flowers. Both routes show up in the cuts list.

The what-if slider works the same way. Raise the same plan from 100 to 120 guests and the estimate rises to $32,325, or $2,325 over budget.

How the guest count model works

The what-if estimate is our own model, not survey data. Catering and bar scale fully with guests. Cake and invitations scale at 80%, the buffer at 50%, flowers at 30% and the venue at 25%. Photography, video, planning, music, attire and hair stay flat. Real quotes jump in steps, such as an extra table or a bigger room, so use it to compare options and then confirm with vendors.

Budget traps to plan for

• Zola says 57% of couples face a mandatory venue service fee. Ask whether each quote includes it.
• Rings, the honeymoon, transport, favors and marriage license fees are not in Zola's table, so add them to the buffer or take them off your total first.
• A low catering number is a warning sign. If your line is far below $80 a guest and your venue does not include food, fix that first.

For the bar line, the wedding alcohol calculator gives a real number. Gifts can help with the total too: a RegistryBee registry is free for couples and turns guests' gifts into money paid to your bank account.

Sources checked November 2026.