Wedding all-in quote calculator

01Problem

The Knot 2026 Real Weddings Study (10,474 couples married in 2025) reports mean spend $34,200, $292 per guest, catering $80/person, bar/alcohol $2,800, cake $540, photographer $3,000, planner $2,100, band $4,500, DJ $1,800. Couples hire 13 vendors on average. A ++ plate, a 20–22% “service charge” that is house money, tax on that charge, card-processing add-ons, and cake-cutting/corkage turn a $150 menu into a ~$199 check. Comparing Venue A at $140 ++ to Venue B at $165 “inclusive of service” without converting both is how the more expensive room wins.

02Intake

Every quote/proposal/BEO: venue, caterer, bar, cake, photo, video, florist, DJ/band, planner, rentals, lighting, transport, officiant
Guest count N (RSVP floor and F&B-minimum implied headcount)
For each vendor: fee structure (flat, per person, per hour, ++), deposit %, balance due date, card vs check price
Service-charge % and whether it is mandatory; % paid to staff; additional gratuity expected
Sales-tax rate and whether tax hits the service charge (state rule)
Cake-cutting, corkage, overtime, security, vendor meals, coat check, valet, parking, required insurance
Whether bar sales count toward the F&B minimum
Peak vs Friday/Sunday/off-peak grid for the same room

03Playbook

01
Build one grid, same N, for every venue and caterer. Columns: site fee, F&B min, menu_pp, bar_pp, SC %, tax %, tax-on-SC (Y/N), mandatory add-ons, all-in, all-in per guest. Refuse to hold a date until the all-in column is filled.
02
Set N correctly. N = max(realistic RSVP, F&B_min / per-person ++ rate). Knot mean guests = 117. A $20,000 minimum at $140 ++ is a 143-person wedding. Budget that headcount.
03
Apply the plus-plus formula. If tax hits the service charge (NY, CA mandatory SC, FL service charges, majority pattern): all-in = quoted × (1+SC) × (1+tax). If tax hits food only: quoted × (1+SC+tax). Never add SC and tax as if they were both on the food only when the state taxes SC.
04
Classify the service charge under the IRS four-factor test (Rev. Rul. 2012-18 / FS-2015-8): free from compulsion; customer sets the amount including zero; not dictated by employer policy; customer chooses who receives it. Fail any factor → house service charge, not a tip. Budget a separate 15–20% cash/credit tip unless the contract says 100% of the charge is paid to the people in the room.
05
Apply the state tax overlay. New York (TB-ST-320, updated 16 Oct 2026): a “service charge” is always taxable. A separately stated gratuity is untaxed only if labeled gratuity, separately stated, and 100% paid to employees. If the house keeps any of a “23% gratuity,” the entire 23% is taxable (TSB-M-09(13)S). NYC combined 8.875%. California (CDTFA Reg. 1603(h), on/after 1 Jan 2015): optional tip not taxed; mandatory SC is in taxable gross receipts even if later paid to employees. Texas (34 TAC 3.337): mandatory gratuity ≤20%, separately stated, identified as tip/gratuity/service fee/charge, and disbursed to qualified employees, is excluded; above 20% the entire amount is taxable. Florida: service charges, minimum charges, corkage, and setup fees are taxable; a separately stated gratuity the business keeps none of can be excluded. DE, NH, OR, MT: no general state sales tax; still ask (NH rooms-and-meals is a different tax).
06
Add drip fees. Industry-typical (not official): cake-cutting $1–$5/guest; corkage $10–$40/750 ml; overtime $400–$2,000/hour; security $65–$125/officer-hour; vendor meals at the menu ++ rate; required event insurance $119–$400 for $1M/$2M. Card processing ~3.4% when the vendor does not absorb it (community-reported; ask).
07
Convert every vendor to the same all-in. Photographer $3,000 mean is usually a flat fee plus overtime; it is not ++. Florist, DJ, and planner often take 25–50% at booking. A 50% nonrefundable retainer on a $12,900 venue is $6,450 locked 12–18 months out.
08
Do not mix Knot spend with Zola plans. Zola 2026 First Look (11,500+ couples marrying in 2026) planned average $36,000 and a venue index $8,573 — planning intent, not 2025 actuals. Knot 2025-wedding venue mean is $12,900.
09
Peak vs off-peak. Knot 2026: Jul–Sep mean $35,400; Jan–Mar and Oct–Dec $33,200; Apr–Jun $34,300. Ask for Sat/Fri/Sun × peak/off-peak. F&B minimums often move more than the site fee.
10
Inclusive vs ++ trap. Venue B at $165 “inclusive of service” vs Venue A at $140 ++ with 22% SC and 8.875% tax: A all-in = $140 × 1.22 × 1.08875 = $185.95. B wins on paper only if B’s “inclusive” really includes tax.
11
Alcohol math. Knot mean bar $2,800. Industry rule of thumb (not official): ~1 drink/adult/hour; 5-hour reception, 100 adults ≈ 500 drinks. Confirm whether bar counts toward the minimum.
12
Cake. Knot mean $540. If the venue charges cake-cutting on an outside cake, display plus kitchen sheet cake is often cheaper than $5 × 117 = $585 cutting on a $540 cake.
13
Decision: pick the lowest all-in at the same N that still clears the F&B minimum, with SC destination in writing and tax-on-SC applied. Walk from any quote that will not fill the grid.

04Checklists