Ask a warehouse for a rate and the first thing that comes back is a question about how long you plan to be there. That question is doing more work than it looks like. It's the line between public warehousing and contract warehousing, and getting it wrong costs money in both directions.
The difference is commitment, not service
There's a common assumption that a contract buys you better treatment. At a warehouse worth using, it doesn't. Same building, same racks, same forklifts, same people on the floor. What changes is the agreement, not the operation.
Public warehousing means you pay for what you use. No committed space, no minimum term. Product arrives, you're billed for the pallet positions it occupies and the handling it takes. Product leaves, the billing stops.
Contract warehousing is a longer-term agreement, and it usually covers more than square footage. Depending on the operation it can commit space, labor, equipment, or all three, structured around what your business actually needs rather than what happens to be available that month.
The reason the unit rate comes down is that the warehouse can plan. Fixed costs run whether the space is full or empty: building, racking, equipment, supervision, and a crew that has to be there Monday morning regardless of what's on the schedule. When an operator can see your requirements two years out, it can staff and slot accordingly instead of holding a buffer for uncertainty. Part of that efficiency comes back to you as price.
The other thing a contract buys is everything you don't have to do yourself. No lease to sign, no building to buy, no forklifts to purchase and maintain, no warehouse staff to hire, train, schedule and cover when somebody quits. For a company that would otherwise be standing up its own operation, that's usually the larger number.
How the money actually works
Public storage is usually billed by the pallet position per month, with separate line items for receiving, order handling and outbound loading. Accessorials cover anything outside the normal flow.
Contract pricing varies more. It might be a fixed monthly figure for a committed footprint, a lower per-position rate against a minimum, or a blended rate that folds storage and handling together.
The arithmetic that matters isn't which rate looks lower on paper. It's what your utilization does month to month. Contract warehousing is cheaper per unit and expensive when you aren't using it. Commit to 1,500 pallet positions and average 900, and you're paying for 600 empty positions every month. The discount you negotiated disappeared somewhere around month three.
Public runs the other way. Higher per unit, and nothing at all when the space sits empty.
When public fits
Anything you can't forecast with confidence. A seasonal business where peak runs three or four times the trough. A new region you're testing before you commit to it. An import program where container timing moves around. Overflow when the plant warehouse fills up and the trailers keep arriving.
Public is also the right first move with a provider you haven't worked with. A year at public rates costs more than a contract would have, and what it buys you is real information. How the warehouse actually performs when something goes sideways. What your volume genuinely looks like rather than what the forecast said. Companies that sign long-term before they have that information usually sign for the wrong number.
When contract fits
A baseline you can defend with history. If two years of data show you never dropped below 1,100 positions, that's a floor you can commit to without guessing.
Contract also makes sense when you need the warehouse to build something for you. Dedicated space, specific racking, a reserved dock door, a crew trained on your product, a system integration on your order file. No operator makes that investment for month-to-month business, and it isn't reasonable to ask them to.
Does a contract mean giving up flexibility?
Less than people assume. Volumes move around for everyone, especially in seasonal businesses, and a contract written as though they won't is a bad contract. A well-structured agreement accounts for the swing, whether that's a seasonal band, a mechanism for overflow, or room to add services as they come up.
Most of our longest relationships started smaller than they are now and changed shape several times along the way. More space, different handling, value-added work nobody discussed at the start. None of that required tearing up the arrangement and starting over.
The thing to avoid isn't commitment. It's committing to a number you can't defend and terms that assume your business stands still.
The version most companies should be running
Both.
Commit to your floor and flex everything above it. Put your confident volume on contract and run the peak through public space. You get the lower rate across the majority of your inventory and pay the premium only on the part that actually moves around.
This is the arrangement that tends to survive contact with a real year. It's also the one companies talk themselves out of most often, because a single-rate proposal is easier to put in front of a CFO than a two-part one.
Two ways this goes wrong
Committing too early is the common mistake. A good rate on space you never fill is not a good deal, and it usually gets discovered in month seven when somebody finally runs the numbers against actual occupancy.
The opposite happens too. Running everything through public space for years because nobody wanted to have the contract conversation. Flexibility has a price, and paying it on inventory that hasn't moved in eighteen months is an expensive way to store dead stock. If your volume has been flat for two years, there's money sitting on the table.
What we'd tell you
Clark quotes both, and for a new account we'd usually suggest starting with public space. Not because it prices better for us. Because the first few months tell both sides things a proposal can't: how your volume actually behaves, how much handling your product really needs, whether the relationship works when something goes wrong at four on a Friday. If it holds up and the volume is steady, the contract conversation is easy and the numbers behind it are real instead of estimated.