The honest math
Bin storage looks cheaper per unit at low volumes. Pallet storage gets cheaper the moment your turn rate slows down. The trick is knowing where that crossover is for your specific SKU mix — and revisiting it every quarter.
Here at SunPort Prep Center in Dania Beach, we run a 2,500 sq ft warehouse with pallet, shelf, and bin storage all under one roof, so we end up having this conversation with almost every founder who walks in. Most people pick a storage type by gut feel — "I'm small, bins must be cheaper" — and then never re-check it as their volume grows. That instinct is right about half the time. The other half, it quietly bleeds margin.
This post is the methodology we use to figure it out. The dollar amounts below are illustrative examples to make the arithmetic readable, not SunPort's published rates. What matters is the shape of the math, not the specific numbers.
How each one is actually priced
The two models charge for completely different things, which is why comparing the sticker prices directly is a trap.
Bin storage is priced per bin per month, or sometimes per cubic foot consumed. You pay for the small slice of space your units occupy and nothing more. If your inventory shrinks, your bill shrinks. It is granular, forgiving, and great when you hold low quantities of a lot of SKUs.
Pallet storage is priced per pallet position per month. A position is a fixed footprint — roughly 48x40 inches and stackable to a set height. You pay the same whether that pallet holds 200 units or 2,000. It is a flat rent on a chunk of space.
So the deciding variable is not your total volume. It is how densely you fill a pallet position and how fast you turn it. A pallet position only earns its keep when it is packed tight and not sitting half-empty for weeks. Bins win when your per-SKU quantity is too small to justify renting a whole position.
Rule of thumb: bins charge for what you use, pallets charge for the space you reserve. The faster and fuller you move through a position, the better pallets look.
The crossover table
Here is the core of it. Say, for the sake of the math, a bin runs ~$8/month and holds up to 40 units, and a pallet position runs ~$25/month and holds up to 400 units when packed well. Watch what happens to the per-unit cost as monthly volume on hand climbs:
| Units on hand | Bins needed | Bin cost/mo | Pallet positions | Pallet cost/mo | Bin $/unit | Pallet $/unit |
|---|---|---|---|---|---|---|
| 40 | 1 | $8 | 1 | $25 | $0.20 | $0.63 |
| 120 | 3 | $24 | 1 | $25 | $0.20 | $0.21 |
| 200 | 5 | $40 | 1 | $25 | $0.20 | $0.13 |
| 400 | 10 | $80 | 1 | $25 | $0.20 | $0.06 |
| 800 | 20 | $160 | 2 | $50 | $0.20 | $0.06 |
Bin cost per unit stays flat — that is the whole point of granular pricing. Pallet cost per unit falls off a cliff as you fill the position. The crossover here lands right around 120 units on hand: below it, bins are cheaper per unit; above it, a well-packed pallet wins and keeps winning.
Note the hidden assumption: the pallet only hits $0.06/unit if it is actually full. A pallet holding 120 units costs the same $25 as one holding 400, so a half-empty position quietly drags your per-unit cost back up toward bin territory. Fill rate is doing as much work in this table as volume is.
Three SKUs, three answers
The same catalog usually wants both storage types at once. Three real-world profiles:
The small fast-mover — a phone accessory, maybe 30 units on hand at any moment because it sells through in days. Renting a whole pallet position for 30 units wastes ~90% of the space. This SKU wants a bin. It never gets dense enough to justify a position, and its speed means you are restocking the bin constantly anyway.
The bulky slow-mover — a seasonal patio item, 600 units sitting for a few months waiting for demand. It stacks neatly, fills positions, and barely moves. This is the textbook pallet SKU: dense, stable, and cheap per unit precisely because the position stays full for a long stretch. Putting this in bins would mean 15+ bins and a much higher monthly bill.
The mid-volume seasonal — a product that holds ~150 units most of the year but spikes to 700 in Q4. This is where the math flips overnight. Off-season it sits just above the crossover, so bins are fine and flexible. In peak season the volume and density justify shifting it to a pallet position or two. The right answer literally changes with the calendar, which is exactly why a once-and-done storage decision costs you money.
A scoping worksheet for your own catalog
Before you can run this for real, pull these inputs per SKU. We walk through this list with clients during onboarding:
- Units per month held on hand (average, not peak)
- Units per case and cases per pallet — this gives you true pallet density
- Average days on hand — how long a unit sits before it ships
- Turn rate — how many times the inventory cycles per month
- Cubic dimensions of the unit, so you know how many fit a bin and a position
- Seasonality — the peak-to-trough swing across the year
Run the per-unit cost both ways with your own numbers and find the crossover for each SKU. Group the bin-side SKUs and the pallet-side SKUs, and you have your storage plan.
One last thing, and it is the most important: revisit this every quarter. Turn rate is the variable that moves, and when it moves the crossover moves with it. A SKU that was a clear bin candidate in spring can become a pallet candidate by fall — and a slow-moving pallet that lost its velocity may be quietly overpaying for a position it no longer fills. The methodology only saves you money if you re-run it.
If you want a second set of eyes on the numbers, contact us — we are happy to run your catalog through this worksheet and tell you honestly where each SKU belongs, even when the answer is "stay where you are."