The 3-Par Rule and Why Most Properties Get It Wrong

Bottom line: The 3-par rule fails because it ignores occupancy swings, wash turnaround, and in-house vs. outsourced processing, so properties run short during spikes and carry too much the rest of the time.

I remember a Saturday in July at the old Grand Meridian. We had 430 rooms, a convention of 400 dentists, and a checkout line that looked like a rock concert. The housekeepers were pulling towels from the dryer before it finished, and I was on the phone with the linen vendor, asking for a delivery that wasn't on the schedule. The GM stood there and said, 'I thought we ran a three-par inventory.' I had to tell him we did. That was the problem. Three-par sounds like a number that works. It doesn't. Not on its own. We had the formula on paper, but the dryers had a 45-minute cycle and the sales team had booked a full house for the weekend. No par count can fix physics. Hotel Laundry Service

I remember a Saturday in July at the old Grand Meridian. We had 430 rooms, a convention of 400 dentists, and a checkout line that looked like a rock concert. The housekeepers were pulling towels from the dryer before it finished, and I was on the phone with the linen vendor, asking for a delivery that wasn't on the schedule. The GM stood there and said, "I thought we ran a three-par inventory." I had to tell him we did. That was the problem.

Three-par sounds like a number that works. It doesn't. Not on its own. The three-par rule is a starting point, a round number that gets thrown around by operators who've never counted the actual inventory behind a busy resort's linen closet. And yet it's the default for way too many properties. I've been in this job long enough to know that if you treat three-par like a law, you're going to run out of towels at the worst possible moment.

What the 3-Par Rule Actually Means

In the linen world, par is the amount of a given item you need to keep the building running for one day. Three-par, then, means you've got three days' worth. The idea is simple: one par's out in the guest rooms, one par's in the laundry, and one par's on the shelf. It's a neat heuristic, and it can work for a small property that does all its laundry in-house and has a steady occupancy. But for a 430-room convention resort? It's barely a starting point.

And there's the second misunderstanding. Most people think the three-par rule is uniform—like a recipe. It isn't. The rule doesn't tell you what a 'day's worth' means per room. A towel that a guest uses on the pool deck isn't the same as a sheet that shows up twice a week for laundering. And a property that sends its linens to an off-site plant is not the same as one with two tunnel washers set up for a twelve-hour turnaround. You can't keep one number for all.

Where Most Properties Get It Wrong

First, they under-count the daily requirement. They look at occupied rooms and multiply by two towels, and stop. They forget the bell cart, the spa, the fitness center, the pool, the banquet linen. They forget that a convention will run through extra towels faster than you'd think humanly possible. I've seen a 300-room property burn through twelve hundred bath towels in a single afternoon because a wedding block decided to bathe three at a time.

Second, they forget the laundry cycle. Three-par only works if your laundry can turn inventory in exactly twenty-four hours. But if you run your own laundry, you also lose a shift on weekends. If you're using a commercial plant, you might be looking at a two-day lead, plus a day of delay in your own delivery cart. That's four days of required par, not three. And in my experience, property owners don't count for loss—the towels that get rolled up in the sheets, the socks that go home with guests, the bath mat that turns up in a hallway. In our union hotel, we budget for a 5% 'shrink' on towels, and it's usually closer to 8%.

How to Actually Set Your Par

Let me give you a real approach. You start with the daily requirement for each line item. For us, at 430 rooms, we run about 85% average annual occupancy, but busy seasons go over 95%. So I take a busy month and count the absolute worst day. For bath towels, I know that on a peak day we need 1,800 complete units just to cover checkouts and turndowns, plus another 600 for the pool and gym. So my daily par target is 2,400 bath towels. Then I multiply by the laundry cycle—our in-house plant is set for a 12-hour turnaround, but I give it a full day to be safe. That gets me to 4,800 towels. Then I add safety stock: enough to cover a delayed delivery or an equipment breakdown. I'll add another 20%—call it 5,800 towels in total. When I order from Standard Textile, I order in dozens, but I think in pieces.

Then you do this for every single item. Washcloths, hand towels, sheets, pillowcases, mattress pads, blankets, bed skirts. Each one has a different cycle time, a different usage rate, and a different abuse factor. Sheets for us run at a 5-par level, because they get changed more often and go through the finish line. Pillowcases, 6 par, because they're tiny and get lost all the time. Bath towels, 4 par, since they're big and slow to dry and guests use them for everything. And that's before you factor in banquets, where a single event can blow through a week of napkins in one evening.

What a Workable Par Looks Like in Practice

Here's a real-world rule of thumb from my spreadsheets. For a resort with an in-house laundry and a one-day turnaround, I'd say a floor par of 3 to 3.5 for standard bath towels works on a normal weekday. But for a convention weekend, you need at least 4.5 to 5 par. For flat sheets, don't go below 4 par, and 5 par is better. And for any item that's easily pocketed or easily lost—washcloths, napkins, pool towels—add an extra par just for shrinkage.

Let me tell you about the towel fairy. I once worked with a housekeeper who hoarded towels on a cart under the loading dock because she was tired of running out. She'd hide them, then produce them when the floor was short, like some kind of secret benefactor. It broke my heart. The fix wasn't discipline—it was par. If the numbers had been right, she'd never have had to be the towel fairy.

If you're using an outside commercial service, your par doubles. You're at the mercy of a plant that may have a two-day lead and their own minimum order. You start with your daily need, multiply by the lead time, then add a day for their truck schedule and another for backups. In those situations, a 5 or 6 par isn't greedy—it's just arithmetic. And the arithmetic changes again if you're a small B&B with no laundry at all, or if you're using a hybrid system where you wash in-house but rent certain items from a company like Johnson's Linen Supply. Been there, done that.

How to Maintain Correct Par (Without Losing Your Sanity)

The only way par works is if you audit it. I run a weekly count of every linen closet, every floor, every cart. It sounds like a lot, and it is. But you don't need to do it by hand. Use a simple spreadsheet or a smart inventory system like LinenTrax. You count what you have, compare it to the par target, and order the difference. When you see a category dipping below par for three days in a row, it's time to adjust the target, not just the order. I've learned that the hard way.

Also schedule a deep count once a month. That means physically counting the product in storage, on the carts, in the laundry, and on the shelves. The numbers always surprise you. We were running with six-par on washcloths, but the actual count said we had two. Someone had been padding the books. Or the washcloths were just walking out. Either way, a monthly count tells you where to fix the leak. And in our resort, the leak is usually the employee locker room.

Par Levels Compared by Real-World Conditions

Frequently Asked Questions

Is the 3-par rule ever accurate?

It can be, for a small property with steady occupancy and an in-house laundry that can turn items in a single day. But even then, it's only accurate if you're counting each item separately and the calendar doesn't include a convention or a long weekend. Most of the time, it's a floor, not a ceiling.

What's the difference between par for sheets and par for towels?

Sheets are usually changed for every checkout and often swapped mid-stay. They also take longer to dry and press. That's why I run sheets at 5 par. Towels get replaced too, but they dry faster and are easier to turn. Four par is a reasonable target for bath towels, and I'd add one more for washcloths because they vanish.

How do I figure out my own par level?

Start with your worst day of the month, not the average. Count what you actually used—checkouts, turndowns, pool, gym, banquets. Multiply that daily number by your laundry lead time in days. Then add a safety margin of 15 to 20 percent for shrinkage, delivery delays, and equipment breakdowns. Do that for every item, not just 'linens.'

Does sending out linen to a commercial plant change par?

Definitely. With an in-house plant, a 12-hour turnaround means you can get away with 3 to 4 par. With an outside plant, you often have a 48-hour lead time plus pickup and delivery schedules. That drives your par up to 5 or 6. It's not about having more linen to be safe—it's about covering the gap between the day you need it and the day the plant can get it back to you.