What’s an Attrition Clause in a Hotel Block?

An attrition clause is a part of a hotel room block contract that means you’ll need to fill a minimum percentage of the rooms you’ve reserved. If your guests don’t book enough rooms by the cutoff date, you’ll have to pay a fee to cover the hotel’s lost income from the empty rooms. Most contracts set the minimum between 75% and 90% of the total block.

How an Attrition Clause Works

When you sign a room block agreement with a hotel, they’ll set aside a set number of rooms at a special rate you’ve agreed on. In return, the hotel expects a certain number of those rooms to be booked. The attrition clause puts that expectation in writing. It sets a minimum booking rate, usually as a percentage, and explains what happens if you don’t meet it financially.

This clause goes hand in hand with your room block cutoff date. Once that date’s passed, the hotel checks how many rooms were actually booked. If it’s less than the minimum you agreed to, the attrition penalty kicks in. The hotel will then invoice you for the difference between the minimum required and the number of rooms actually booked.

Why the Attrition Clause Matters for Weddings

Wedding room blocks often cover 10 to 50 rooms (or more) over one or two nights. That’s a fair chunk of revenue for the hotel. The attrition clause is there to protect the hotel from holding onto rooms that end up empty. For you, it means you could be on the hook for a few hundred to several thousand dollars if not enough guests book.

Getting your head around the clause before you sign lets you set your block size just right. The most common reason couples get hit with attrition charges is overestimating how many guests will actually book. A realistic guest count—based on how far people are travelling and where your venue is—helps you avoid paying for rooms that go unused.

Common Attrition Rates and Penalty Structures

Hotels handle attrition penalties in a few different ways:

Percentage-based threshold. This is the most common setup. You’ll need to fill 80 per cent (or another agreed number) of your block. Penalties only apply to the gap between the threshold and your actual bookings—not every empty room.
Revenue-based calculation. The penalty matches the lost room revenue for each unfilled room below the threshold. Some contracts also include taxes, resort fees, or estimated extra spending.
Sliding scale. A handful of hotels use tiered penalties: a smaller charge if you fill 70 to 79 per cent, and a bigger charge if you drop below 70 per cent.
Resell credit. Some contracts say that if the hotel resells an attrition room to a walk-in guest, that room won’t count against your shortfall anymore.

Always ask the hotel to spell out exactly which charges are included in the penalty calculation before you lock in the agreement.

Tips for Negotiating a Favourable Attrition Clause

You’ve got more bargaining power than you might think, especially in off-peak times or with hotels keen to host wedding groups. Try these tips:

Lower the threshold. Ask the hotel to drop the required fill rate from 80 per cent to 70 per cent. Even a small drop can save you hundreds if a few guests change their plans.
Request a review date. A review date, set two to four weeks before the cutoff, lets you hand back any unbooked rooms to the hotel without penalty. This gives them time to resell the rooms to someone else.
Add a resell credit. Make sure your agreement includes a clause that credits you for any rooms the hotel resells. If they fill those rooms with other travellers, your liability goes down.
Start with a smaller block. It’s easier to add more rooms later than to pay for rooms you don’t need. Many hotels will let you increase your block if demand is high, so starting small is a smart move.
Share your booking link early. The sooner guests book, the sooner you’ll know your numbers. Using a centralised booking tool helps you keep track and make changes before the cutoff date.

Attrition vs Cancellation: The Key Differences

It’s important to tell the difference between attrition and outright cancellation. Attrition covers a shortfall in bookings within a block you’re holding. Cancellation clauses kick in when you call off the whole block or event. Cancellation penalties are usually higher, sometimes worked out as a percentage of the total estimated revenue from rooms, food and beverage, and meeting space all up.

Take a close look at both clauses. If things change and you need to cancel, knowing the difference helps you pick the option that costs you less—whether that’s trimming down your block or cancelling altogether.

Frequently Asked
Questions

What’s a typical attrition rate for a hotel block?

Most hotels set attrition rates between 75% and 90%. That means you’ll need to fill at least 75–90% of the rooms in your block, or you’ll cop a penalty for the empty ones. An 80% rate is the most common threshold in wedding hotel contracts.

How’s the attrition penalty worked out?

The hotel multiplies the number of rooms you didn’t fill (below the minimum commitment) by the agreed room rate. Some contracts also add taxes and resort fees to this. For example, if your block has 30 rooms at $200 a night and you need to fill 80%, dropping to 20 rooms means you’ll pay a penalty for 4 rooms (24 minus 20), which comes to $800 before taxes.

Can you negotiate the attrition clause?

Yes. You can ask the hotel to lower the required fill percentage, extend the cut-off date, add a review window so you can release rooms before any penalties kick in, or include a clause that credits any rooms the hotel resells to walk-in guests towards your attrition penalty.

What happens if you don’t meet the attrition requirement?

The hotel will invoice you for any shortfall after the event. Depending on your contract, the charge might just cover room revenue, or it could also include estimated food, drinks, and any extras the hotel expected from those guests. Make sure you read the contract carefully before signing so you know your maximum financial risk.

Is an attrition clause the same as a cancellation clause?

No. An attrition clause covers rooms that aren’t booked within a block you’re holding. A cancellation clause kicks in if you cancel the whole block or event. Cancellation penalties are usually steeper and can include charges for lost food and beverage revenue, venue hire, and other contracted services.

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