Wedding Budget Calculator

Background.

Plenty of couples set a $30,000 limit, divide all of it between vendors, add 10% for surprises, and end up planning a $33,000 wedding without noticing. This budget works the other way round. The total you enter is the ceiling with the reserve already inside it, so the contingency is carved out first: at 10%, $30,000 ÷ 1.10 leaves $27,272.73 for vendors and holds back $2,727.27.

The vendor money is then divided among ten categories by percentage: venue and catering, photography and video, attire, decor and flowers, entertainment, planning help, stationery, transport, officiant and license fees, and a miscellaneous line. The starting split puts 45% on venue and catering, since the reception space and food are usually the largest single cost, but every share can be changed, and a running total tells you whether they still add up to 100%.

As quotes come in, type each one next to its category and it is compared with its envelope: a positive figure is room to spare, a negative one is the amount the quote runs over. Guest count turns the totals into per-guest figures, the quickest way to see what each name on the list costs. The cash side is handled separately. What you have saved and the deposits already paid come off the total, and the rest is spread across the months left before the final payments fall due.

The arithmetic knows nothing about what weddings cost where you live, and it uses no currency symbol, so the figures are whatever you plan in. What you get is a plan to test against real quotes rather than a forecast of the final bill.

What is wedding budget calculator?

A wedding budget is a spending plan for one event with a fixed date: a ceiling, a split of that ceiling into categories, and a schedule for finding the cash before the bills arrive. It follows the pattern the FTC's consumer.gov budgeting guidance sets out for a household, writing down the money available, listing what it has to pay for and comparing the two, except that most wedding spending lands in a few large payments rather than month by month. Three ideas run through it. Contingency is money deliberately left unassigned to absorb price rises, forgotten items and late changes. An allocation is the part of planned spend a category is allowed. A variance is the gap between an allocation and a real quote, the number that shows where a compromise is needed.

How to use this calculator.

1. 01Enter the total all-in budget, the most you are prepared to spend including any reserve, and your expected guest count.
2. 02Set the contingency percent. It is taken out of the total rather than added to it; 10% is filled in, and any value from 0 up to, but not including, 100% works.
3. 03Adjust the ten category shares to your priorities and watch Category share total. Shares are applied exactly as typed, so a total above 100% overcommits planned spend and one below 100% leaves money unassigned.
4. 04Type vendor quotes into the matching estimate fields as they arrive. Leave a category's estimate at 0 until you have a figure; its comparison line stays hidden until then.
5. 05Enter the amount already saved, the deposits already paid and the months until your final payments are due, which must be more than zero.
6. 06Read the envelopes, the over-and-under lines and the monthly target together, and rerun the plan whenever a quote, a deposit or the guest list changes.

The formula.

The ceiling is split first. Planned spend S = B ÷ (1 + c), where B is the total budget and c the contingency percent as a decimal, and the reserve is B − S. Dividing rather than subtracting makes the reserve c of planned spend, not of the total: a 10% contingency on $30,000 holds back $2,727.27, which is 10% of the $27,272.73 left for vendors and about 9.1% of the whole. As a fraction of the total the reserve is c ÷ (1 + c), so 10% holds back one-eleventh and 20% one-sixth ($30,000 ÷ 1.2 = $25,000 planned, $5,000 reserve). Planned spend plus reserve always equals B.

Each category's allocation is S × share ÷ 100. The shares are not rescaled to fit: if they add up to 103%, the allocations add up to 103% of planned spend and silently eat into the reserve. Category share total shows the sum so you can catch that.

The per-guest figures divide by guest count, B ÷ guests for the all-in amount and S ÷ guests for the vendor money behind each person.

A variance is allocation minus estimate, worked out only for categories where the estimate is above zero. Positive means room left in that envelope; negative is the amount the quote exceeds it.

The savings side ignores the categories altogether. Remaining to save = B − amount saved − deposits paid, never less than zero, and the monthly target divides it by the months until final payment. Because it starts from B, the reserve is included: the plan has you holding the whole contingency in cash by the deadline, whether or not it ends up being spent.

A worked example.

Frequently asked questions.

References& sources.

1. [1]Federal Trade Commission (2024). Making a Budget. consumer.gov.
2. [2]Federal Trade Commission (2024). Budget Worksheet. consumer.gov.
3. [3]Consumer Financial Protection Bureau (2026). Your Money, Your Goals toolkit. CFPB.
4. [4]U.S. Bureau of Labor Statistics (2026). Consumer Expenditure Surveys. BLS.
5. [5]U.S. Bureau of Labor Statistics (2025). Consumer Expenditures News Release - 2024 A01 Results. BLS.