An event budget: estimates, quotes, deposits and a contingency line

A budget sheet with every cost estimated, then quoted, then paid; one contingency line instead of padding every row; deposits and their due dates; who pays; and, for a fundraiser, the break-even count.

One line per cost: estimate, quote, actual Understand

A budget line is one row for one cost: the room, the caterer, the ice. The budget sheet groups lines by category. The categories below adapt the University of New Mexico's event budget worksheet to a private event (UNM's budget worksheet). The last column comes from the University of Kansas Community Tool Box, whose list of fundraiser costs includes several lines hosts tend to miss (the Community Tool Box's fundraiser section).

Three columns: estimate, quote, actual

Each line has three amounts, filled in as the event goes on. An estimate is your own figure before you ask anyone. A quote is the supplier's written price. An actual is what you paid. The columns show at a glance which lines are still guesses. The University of Houston's budgeting guide for student groups says to obtain quotes and shop around, and to get real numbers instead of overestimating (the University of Houston's budgeting guide). As quotes come in, they replace estimates. Hiring suppliers puts several quotes for the same job on one table.

Write every estimate all-in: the price with tax, delivery, service charges and fees included. The Maryland Institute College of Art's guide asks for estimates that include all taxes, shipping and delivery fees (MICA's Budgeting for Events). A tent at $600 that costs $735 delivered and taxed is a $735 line.

Fixed costs and per-guest costs

A fixed cost stays the same whether 30 or 50 people come: the room, the tent, the musician. A per-guest cost rises with each person: a caterer's price per plate, drinks, chairs, favors. Some costs move in steps: tables come eight seats at a time, and a bigger crowd may need a bigger tent. Mark each line as fixed or per guest in the notes column. It changes how you cut.

Per-guest costs are why the guest list is the budget's biggest lever. Adding ten guests at, say, a caterer's $28 a plate adds $280, plus their drinks and chairs, without touching the fixed lines. Removing the musician saves the same amount however many come. When a budget is over its ceiling, look first at the per-guest lines and the count, then at the largest fixed line. Guests and invitations is where the count is set.

Divide the total by the number of guests, hosts included, to get a per-guest figure. It is a check, not a target. The budget calculator works it out from the ceiling.

Over the ceiling

When the total, contingency included, is over the ceiling, there are three honest moves. Cut or shrink a line. Shrink the event, which usually means fewer guests or a shorter program. Or raise the ceiling, on purpose, and write the new figure and the reason in the decision log. The move to avoid is the quiet one: shrinking the contingency line to make the total fit. That leaves the budget balanced on paper and short on the day.

The contingency line

A contingency line is one row in the budget for costs nobody can name yet: a delivery fee nobody mentioned, extra ice in a heat wave, a permit fee, a second store run. Keep it as one explicit row, not as a little padding added to every line. Padding hides the slack, and it gets spent without anyone deciding to spend it. Houston's advice to get real numbers instead of overestimating points the same way: honest estimates, and the slack in one visible place.

Size it yourself. As a starting point, we use 10 percent of the ceiling. Convention The sources that give a figure use 10 to 20 percent, and none of them is a US public body: a UK university's arts program uses 10 percent, an Australian council suggests 10 to 15 percent for outdoor events, and a UK university's conference venue suggests 15 to 20 percent. The figures and what each applies to are side by side under Go deeper. Go higher when much of the budget is still estimates, when the event is outdoors, or when it is the first time you have run it. Go lower when most lines are firm quotes. That reasoning is ours; the sources give ranges, not rules for choosing within them.

Three habits keep the line useful:

• Ring-fence it. The University of Birmingham's conference team says the contingency is not money for nice-to-haves (the University of Birmingham's event budget post). Decide who can spend from it; on a group budget, that is whoever approves spending.
• Move money, and write it down. When a line runs over, take the difference from the contingency line and note it. The University of Exeter's arts guide says that if one line runs over, adjust another down (Exeter's Budgeting guide).
• Keep what is left. Unspent contingency is not a surplus to spend in the last week. It goes back to whoever paid, or to the group's funds.

The budget calculator takes the ceiling, the guest count and a percent (default 10), and gives the contingency line, the amount left to plan with and the amount per guest.

Deposits, balances and due dates

A deposit is a part payment that holds a date or an order. The balance is the rest, due on a date the supplier sets: before the event, on the day, or after. Each supplier line on the budget sheet has a deposit amount, a balance due date and who pays. Fill them in from the contract, not from memory.

Deposits matter to a budget in three ways.

• Timing. A budget can total under the ceiling and still need money before the hosts have it: a deposit months ahead, a balance on a weekday before the event. Nicholls State's guide tells student groups to get their finances in order one to two weeks out, so bills due on the day can be paid (Nicholls State's Event Planning Guide). Put each due date on the planning schedule.
• Refunds. Ask whether a deposit is refundable, until when, and what happens if the event is cancelled or moved. Caterers' published terms differ widely. One university caterer turns a fee of 25 percent of the contract into the deposit and charges 75 percent from two weeks out and 100 percent inside 48 hours (Vanderbilt Catering's policies); another charges nothing with 14 days' notice (Puget Sound's booking and cancellation terms). These are examples, not a standard. Hiring suppliers lists the questions to ask. Ask the authority
• Exposure. Money paid ahead is money at risk if a supplier does not deliver. How you pay it decides what you can do about that (paying by card).

A caterer's count rules are a budget matter too. The three caterers' terms read for this manual all bill the larger of the guarantee (the final count you give) and the number who come, and two of them use your last estimate as the guarantee if you do not send a final count. If you tell a caterer 60 and 52 come, you pay for 60. The final count is set in Guests and invitations.

Service charges, tips and tax on a quote

A caterer's or venue's quote may carry a line called a service charge, a gratuity or an event fee, often a percentage. Budget it as part of the price. The IRS treats a charge the customer is required to pay as a service charge, not a tip, whatever it is called. Its 2017 fact sheet says that amounts an employer requires a customer to pay are service charges, and lists a "banquet event fee" and a large party's automatic gratuity as examples (IRS fact sheet FS-2017-08). A tip (or gratuity in the everyday sense) is a payment the customer chooses freely, in an amount the customer sets.

The same fact sheet says some employers keep a portion of service charges. So a service charge on a quote does not tell you what the serving staff receive. For the budget, that gives two lines:

• The service charge, on the supplier's line, as part of the all-in price. Ask what it pays for and whether any of it goes to the staff who work your event (Hiring suppliers lists it among the contract questions).
• A tip, if you decide to give one, on its own line under service charges and gratuities, with an amount you choose. Whether and how much to tip is the hosts' decision. Preference

Tax is the other part of an all-in price. How sales tax applies to food, rentals and service charges depends on the state, so ask the supplier to show tax on the quote, and budget the total. Ask the authority

Paying by card, and payments to avoid

How you pay a deposit decides what you can do if the supplier does not deliver. A US credit card carries rights under the federal Fair Credit Billing Act. Two parts of it matter to a host.

• A billing error, including a service not delivered. The statute counts as a billing error a charge for goods or services not accepted, or not delivered as agreed (15 U.S.C. § 1666 at Cornell's LII). The Consumer Financial Protection Bureau says to call the card company right away and to send a written billing error notice within 60 days after the charge appeared on your statement; the company then has 30 days to acknowledge it (CFPB's How do I dispute a charge). A rental company that takes a deposit and does not bring the tent is this case.
• A dispute about quality. When the service was delivered but not as promised, a separate section lets a cardholder raise the same claims against the card issuer that they have against the seller. The statute sets conditions: a good-faith attempt to resolve it with the seller first, a transaction of more than $50, and a purchase in the cardholder's home state or within 100 miles of their mailing address (15 U.S.C. § 1666i at Cornell's LII). The amount is limited to what was still unpaid on that charge when you notified the issuer.

These rights belong to credit cards. The quality-dispute section applies to credit card accounts, not debit cards. The Better Business Bureau says a dispute is much easier with a credit card, and that with a debit card, a digital wallet or cash you may not get your money back (BBB's rental scam alert). Its venue advice says to make the deposit with a credit card for the same reason, and to read the contract's cancellation, deposit-return, date and cleanup terms first (BBB's venue tips).

The pattern to avoid

The BBB's 2025 alert describes fake party rental "vendors" who take a deposit to hold a date, then do not deliver and disappear; one reported loss was over $16,000. Its warning signs: a business that exists only on social media, will not talk by phone or in person, or asks to be paid by a digital wallet app or wire transfer. Its checks: a contract showing the delivery date and time, the final cost and the payment details, with no surprise fees, signed and dated by both sides, and a copy kept.

If a supplier keeps a deposit for an event it could not hold, a state attorney general's consumer office is one place to complain. In 2021, New York's attorney general announced $427,000 returned to 76 people whose deposits a country club and caterer had kept after events were cancelled under the state's limits on gatherings (New York Attorney General's 2021 announcement). That is one state's case, not a promise of the same result. Ask the authority

Splitting costs among hosts

When two or more hosts share the cost, write down who pays what before anyone spends. The questions to settle are the ones easy to leave unsaid: who pays the deposit, what happens if the total runs over, and when people settle up. Write four things in the brief's who-decides line or the budget's notes:

1. The shares. Equal thirds, or each host takes certain lines, or a fixed amount per household (a family reunion often asks each household for the same contribution).
2. Who fronts what. One host's card for the caterer's deposit, another's for the tent. Put the name in the budget sheet's "paid by" column.
3. The overrun rule. What comes from the contingency line, and what needs all the hosts to agree.
4. Settling up. After the event, from the actuals: each host's share of the actual total, minus what they paid. Those who paid less than their share pay those who paid more.

On the budget sheet's income tab, shares go in as "hosts' shares", expected and received. The Ortiz example works a three-way settle-up.

Fundraisers: income, break-even and ticket rules

A fundraiser's budget has a second side: income, the money expected in from tickets, donations, sponsors and sales. The budget sheet's income tab holds each source, expected and received. UNM's worksheet ends in three lines, total expenses, revenue and net, and its guide says to weigh income against cost and not to buy fundraising supplies unless you are reasonably sure of covering the costs (UNM's Event Planning Guide (PDF)). The Community Tool Box asks for a revenue target, an expense limit, a break-even point and the net revenue you want.

The break-even count

The break-even count is the number of tickets at which income covers costs, so the net is zero. Below it the event loses money; above it, each ticket adds to the net. To find it:

1. Add up the fixed costs, including the contingency line. Subtract any donations and sponsorships you are sure of.
2. Find the margin per ticket: the ticket price minus the per-guest cost. If there are two prices (adults and children), use the average price under the mix you expect.
3. Divide the first figure by the second, and round up.

If the margin is zero or less, there is no break-even: each ticket costs at least what it brings in. The same figures give the net at your expected count (income minus all costs) and the price you would need to reach a goal: total costs plus the goal, divided by the expected count. The break-even calculator does all three.

Count only income you are reasonably sure of. A raffle that may need a license, or a sponsor who has not confirmed, goes on the income sheet as expected and stays out of the break-even until it is settled (Permits and insurance covers raffles). Who handles cash, and how it is counted, is in Volunteers and helpers.

Tickets, donations and the IRS

When a charity sells a ticket that includes a meal, federal rules on deductions apply to the donor. They are stated here as IRS Publication 1771 and Publication 526 state them.

• A ticket is deductible only above the value of what the donor receives, and only when paid with intent to give. Publication 526's example: a $65 ticket to a church dinner dance worth $25 lets the buyer deduct $40 (IRS Publication 526). The part of a payment that buys something is the fair market value; a payment that is partly a gift and partly a purchase is a quid pro quo contribution.
• Over $75, a written disclosure. A charity that receives a single payment of more than $75 for which the donor gets goods or services gives the donor a written disclosure statement: the deductible amount is limited to the payment minus the value received, with a good-faith estimate of that value. Publication 1771's example is a $100 concert ticket worth $40: the deduction may not exceed $60, and the disclosure is still required because the payment exceeds $75 (IRS Publication 1771). The penalty for a charity that does not disclose is $10 per contribution, up to $5,000 per event, unless there was reasonable cause.
• $250 or more, a written acknowledgment. A donor needs a contemporaneous written acknowledgment from the charity to deduct any single contribution of $250 or more.
• Raffle tickets are not deductible. Publication 526 says so for raffle, bingo and lottery tickets.

A single ticket at $12 is under $75. A family paying for several tickets in one payment can go over it, which is a question to put to the treasurer. The break-even calculator shows the Publication 1771 note when a ticket price is over $75, and the run sheet's after list carries donor acknowledgments for a fundraiser.

After the event: actuals

Close the budget within a week of the event, the window Northern Kentucky University's guide gives for its after-event tasks. UNM's guide says to update the budget after the event and leave notes for future coordinators. Nicholls State's says to pay outstanding balances, finalize spending, check it against the budget and report to the treasurer or advisor. NKU's guide adds: deposit money on the next business day (NKU's How to Plan an Event).

1. Enter the actuals. Every receipt, on its line, in the actual column. Keep the receipts with the binder.
2. Get deposits back. Cleaning and damage deposits, rental deposits; note the date each comes back.
3. Explain the differences. For each line well over or under its estimate, one sentence on why. The variance is the difference between estimate and actual, and the sentence is what makes it useful next time.
4. Settle up. Co-hosts pay each other from the actuals. A group reports the net to its treasurer; a fundraiser sends any donor acknowledgments.
5. Write notes for next time. What cost more than expected, which supplier to use again, what to cut.

The day-after tasks are on the run sheet's after list (The run sheet), and the numbers go into the debrief.

See it: Marcus, the Ortiz split and Dana's break-even See it

Practice: build the budget Practice

Minimum: a list of costs with estimates, a contingency line, deposits marked, and a total compared with the ceiling. Time: 20 minutes for a small dinner; an hour or more for a party with suppliers. Materials: the brief's ceiling and count (brief sheet), any quotes or price lists you have, the budget sheet and the budget calculator.

1. Copy the ceiling and the count from the brief. Run the budget calculator to get the contingency line and the amount left to plan with.
2. List every cost, one line each, by category. Use the category table to catch what you missed. Write each estimate all-in.
3. Mark each line fixed or per guest in the notes.
4. For each supplier, fill in the deposit, the balance due date and who pays. Put the due dates on the planning schedule.
5. Total it and compare. If it is over, cut, shrink or raise the ceiling on purpose, and record the decision.
6. If hosts share the cost, write the shares, who fronts what, the overrun rule and when you settle up.
7. For a fundraiser, fill the income tab and run the break-even calculator with only the income you are sure of.

Your event Your event

Check your work Check your work

Criteria

• Does every cost you can name have a line, with an all-in estimate?
• Is there one contingency line, sized on purpose, and not padding spread over other lines?
• Does each supplier line show the deposit, the balance due date and who pays?
• Is the total, contingency included, at or under the ceiling, or was the ceiling changed on purpose and recorded?
• If hosts share costs: are the shares, who fronts what, the overrun rule and the settle-up written down?
• For a fundraiser: is the break-even count worked from income you are reasonably sure of, and is the goal a net amount?
• After the event: are the actuals entered and the differences explained?

Worked example

The Ortiz budget, after the fix, passes. Every line is all-in; the caterer's line includes its service charge and tax. The contingency is one $300 line. The two deposits show amounts, timing and who pays, and both go on a credit card. The total is exactly the $3,000 ceiling, reached by cutting two lines rather than shrinking the contingency. The split is written before spending, with an overrun rule. What it does not settle: whether the tent needs a permit and what that costs, and what the service charge pays for. Both are open, with the place to find the answer named.

Common mistakes

• Estimates without tax and delivery. The total comes in low and stays low until the invoices arrive.
• Padding every line instead of one contingency line. The slack gets spent without a decision.
• Shrinking the contingency to make the total fit. That is a change to the ceiling in disguise.
• Treating a mandatory service charge as the tip. Ask what it pays for.
• Paying a deposit by wire or payment app to a supplier you cannot check. The BBB's warning sign.
• Counting raffle or sponsor money before it is sure, or buying fundraising supplies on it.
• Splitting costs by "we'll sort it out after." Write the shares before anyone spends.

What is still unresolved

The real prices come from suppliers' quotes (Hiring suppliers). The count that drives per-guest costs is set in Guests and invitations. Permit and insurance costs come from the bodies that set them (Permits and insurance). Whether a ticket is deductible, or a disclosure is required, is for the group's treasurer or a tax adviser. Whether a card dispute succeeds is for the card issuer.

Knowledge check and scenario

Checklist

• The budget sheet totals at or under the ceiling, contingency included, or the brief's ceiling was changed on purpose.
• There is one contingency line, and its size was chosen on purpose.
• Each deposit shows its amount, the balance due date and who pays, and the dates are on the planning schedule.
• If hosts share costs: shares, who fronts what, the overrun rule and the settle-up are written. If it is a fundraiser: the break-even count is worked from income we are sure of.
• After the event: actuals entered, deposits back, differences explained, notes left for next time.
• I compared the contingency figures and read the card dispute steps in full. (Go deeper; optional)