Wedding Hotel Blocks: How They Work, What They Cost, What to Ask

What a hotel block is

A hotel block is a set of rooms a hotel holds under your name at a group rate, so your traveling guests book from one reserved pool instead of racing strangers for rooms. Guests still pay for their own rooms. What you control is whether rooms exist, what they cost, and how long they stay held.

The block is one decision with two doors: a courtesy block, which costs you nothing, or a guaranteed block, which trades a deeper discount for real financial risk. Most couples never learn the second door has a bill behind it until they have signed. This guide covers the whole decision. Every number in it is current as of August 2026.

Before you call a hotel, know your rough guest count and where people are coming from. Both come straight from your guest list, which is why the list comes first.

Courtesy vs guaranteed: the whole decision

Hotels offer two kinds of blocks, and the names vary by chain, but the structure does not.

A courtesy block (also called a soft or open block) holds a limited number of rooms, commonly 10 to 20, at a group rate with no financial commitment. Guests book directly with the hotel before a cut-off date. Whatever is unbooked on that date goes back into the hotel’s inventory, and you owe nothing. The trade: the hotel caps how many rooms it will hold this way, and it can shrink or cancel the block if the property is filling up.

A guaranteed block (also called a contracted or closed block) is a signed contract for a set number of rooms. The rooms cannot be given away, the discount is usually deeper, and perks become negotiable. The trade is an attrition clause: you are personally liable for a percentage of the rooms whether or not guests book them. Some hotels also ask for a deposit up front, which GreatEvent puts at 25 to 50 percent for contracted blocks.

The default answer is the courtesy block. It is free insurance for your guests. Sign a guaranteed block only when your traveling count is large, predictable, and worth the deeper rate, and even then, contract for fewer rooms than you expect to need. Joy puts the contracted block at about 80 percent of your real estimate, because adding rooms later is easy and shedding them costs money.

Attrition, cut-off dates, and the clauses that cost money

Three contract terms decide whether a block ever costs you a dollar.

Attrition. The clause in a guaranteed block that sets the minimum share of rooms your guests must book, commonly 80 percent, with published ranges from 70 to 90 percent (Where Will They Stay, Joy). The math is blunt: block 20 rooms at 80 percent attrition and your guests must book 16. If they book 14, you pay for 2 rooms yourself. At a $200 room rate across a two-night block, a shortfall of a few room nights runs into four figures. Read the clause as a dollar amount, not a percentage, before signing.

Cut-off date. The day unbooked rooms leave the block, usually about 30 days before the wedding, though it varies by chain: GreatEvent lists roughly 14 days at Marriott, 21 at Hilton, and 30 at IHG. In a courtesy block the cut-off is your friend, since release is what keeps the block free. It also means guests who book after the cut-off lose the group rate and maybe the room, so the cut-off date belongs on your wedding website and in the same push as your save the dates and invitations.

Deposit and cancellation. Courtesy blocks require neither. If a hotel asks for a card number to “hold” a courtesy block, ask what it secures; if the answer involves liability for unbooked rooms, it is a guaranteed block wearing a friendlier name.

So do blocks cost money to set up? A courtesy block, no. Nothing up front, nothing if rooms go unbooked. A guaranteed block can cost real money at both ends, which is exactly why hotels discount it.

How many rooms to block

The working rule: take your out-of-town guest count, divide by two, and block about that many rooms. Two guests share most rooms, and some travelers will use points, stay with family, or book elsewhere no matter what you reserve. Joy’s guidance runs the same way: cut the out-of-town count in half, and expect roughly 70 to 80 percent of travelers to actually book through the block.

Worked example: 100 invited guests, 60 from out of town. Half of 60 is 30, and after the travelers who make their own plans, a block of 20 to 25 rooms is the realistic ask. Most chains open group rates at 10 or more rooms (GreatEvent), so even a small traveling list usually qualifies.

Two refinements:

• Split across two hotels at two price points. A $250 room is a gift to some guests and a burden to others. One mid-range and one budget block near each other covers the list without anyone wincing.
• Round down, not up. In a courtesy block, an oversized ask just gets released. In a guaranteed block, every extra room is attrition exposure. When unsure, block fewer and add later.

What to ask the hotel

Get answers to all of these in writing before choosing a hotel, and keep the answers next to the contract:

1. Is this a courtesy block or a guaranteed block?
2. Is there any scenario where we pay for unbooked rooms?
3. What is the cut-off date, and what happens to unbooked rooms on it?
4. What is the group rate, and what does the same room cost tonight on your website?
5. Can guests book online with a group code, or phone only?
6. Can we add rooms at the group rate if the block fills?
7. Does the rate extend a night or two on either side of the wedding?
8. Is parking included, and what does it cost if not?
9. Any comps: a free room per set number booked, or a rate on a suite for getting ready?
10. For a guaranteed block: what is the attrition percentage, in dollars, and is there a deposit?

Question 4 matters more than it looks. A group rate is only a deal if it beats what guests can get themselves. Check the hotel’s public rate for your dates before celebrating the discount; group rates typically land 10 to 40 percent under published rates (GreatEvent), and if yours does not, negotiate or move on.

Planning in Chicago?

Chicago hotel rates are not steady across the calendar. Summer and early fall weekends collide with festivals and conventions, and rates move accordingly, so a block on those weekends is worth reserving early. The city-specific numbers, including where hotel blocks sit in the full budget, are in our Chicago wedding cost breakdown. If your date lands on a big festival or convention weekend, treat the block like a vendor: book it right after the venue, not 6 months later.

Mistakes to avoid

• Signing a guaranteed block for the discount without doing the attrition math. Convert the percentage to dollars at your room rate. That number is what you are risking to save a little per night.
• Blocking one room per out-of-town guest. Couples share rooms and some travelers book their own way. Half the out-of-town count is the starting point, not the invite count.
• Missing your own cut-off date. Put it on the wedding website the day the block opens, and remind guests two weeks before it hits. After the cut-off, the rate and the rooms are gone.
• Waiting until invitations go out. Ask hotels 6 to 9 months ahead, and 9 to 12 for peak-season dates, destination cities, and holiday weekends (Joy). The block should exist before your save the dates point anyone to your website.
• Skipping the block entirely for a traveling list. With no block, guests pay rack rates and scatter across the city. A courtesy block costs you nothing; skipping it just moves the cost onto your guests.
• Taking the group rate on faith. Compare it against the hotel’s public rate for your dates before telling guests it is a deal.