300-Person Wedding Cost Calculator (2026)

A standard Saturday summer wedding for 300 guests averages around $82,500, ranging from $70,125 to $94,875. This is a major event and one of the largest wedding scales most couples plan.

Hotel grand ballrooms, dedicated event centers, and large banquet halls are the most common venues for 300 person events. Many areas have limited options at this capacity, making early booking (18 to 24 months) essential.

300 guests is uncommon in the US but not unusual for South Asian, Greek, Italian, Mexican, and other cultural wedding traditions that prioritize large family gatherings. The planning complexity is significantly higher than for 100 to 150 person events.

Catering and bar service for 300 guests typically runs $25,000 to $45,000 for full service with open bar. This is the largest single expense for most 300 person events. Buffet and cocktail reception formats reduce this by 15 to 25 percent.

For 300 guests, plan to send 130 to 150 invitation suites. Mid-range printed invitation suites with postage run $900 to $2,000 at this volume. Many couples order 10 to 15 extra suites for keepsakes and late additions.

It depends heavily on your state. In Mississippi, a 100-person wedding costs roughly $24,500 ($8,000 fixed + $165/guest). In New York, that same wedding runs about $69,500 ($28,000 fixed + $415/guest). The US national average is around $35,500. Use the state dropdown above to see your specific estimate.

The national average cost per wedding guest is approximately $235, according to The Knot’s 2025 Real Weddings Study. This covers catering, bar, place settings, favors, and per-head stationery. In high-cost states like New York or Massachusetts, expect $385–$415 per guest. Budget-friendly states like Mississippi or Arkansas can be as low as $165–$170 per guest.

Start with the total you can realistically spend. Then use this calculator to see how many guests that budget supports. The formula is: Total = Fixed Costs + (Per-Guest Cost × Guest Count). Because per-guest costs scale instantly, the absolute best way to protect your budget is to set a strict guest limit before you send save-the-dates. (Tip: iDoTogether lets you set a hard cap on your guest list so you literally cannot over-invite).

Yes - cutting your guest list is the single most effective way to reduce wedding costs. Unlike fixed costs (photographer, DJ, officiant), per-guest expenses scale linearly. At the national average, every guest you remove saves $235. Cutting 20 guests saves nearly $4,700. The key is knowing who’s actually coming - which is why confirmed RSVPs matter more than estimates.

To stay under $20,000, focus on three levers: (1) Keep your guest list under 80 people - this is the biggest cost driver. (2) Choose a budget-friendly state or venue type: think backyard, public parks, or off-peak dates (Fridays, Sundays, winter). (3) Choose buffet service over plated to save up to 12% on per-guest catering costs. At $165/guest with $8,000 in fixed costs, 70 guests lands at $19,550.

Off-peak timing can significantly reduce costs. A Friday wedding typically saves 8% compared to Saturday, Sunday saves 10%, and a weekday wedding saves up to 18%. Seasonally, fall weddings save about 5% and winter weddings save up to 12% vs. peak summer rates. Combine a Friday in winter and you could save up to 30% on both fixed and per-guest costs - that’s over $10,000 on a $35,000 wedding.

The most commonly forgotten costs include tips and gratuities (15–20% of total vendor fees), attire alterations ($300–$800), vendor meals ($150–$400), overtime charges ($500–$1,500), beauty and hair trial runs ($200–$500), guest transportation ($500–$2,000), and thank-you card postage ($100–$300). Use the Hidden Costs Checklist above to add these to your estimate and see the true total.