Packaging SKU Rationalization: How to Cut Your Pack Count Without Breaking Fulfillment

Packaging SKU rationalization is the deliberate reduction of how many distinct packaging formats, sizes, and structures your brand buys — usually from a sprawl that grew by accident down to a tight set that earns its keep. The payoff is not just a cleaner spreadsheet. Fewer formats means higher volume per format, which means better per-unit pricing, faster line changeovers, fewer warehouse slots, and less obsolete stock written off at year end. The catch is that cutting the wrong pack breaks fulfillment, so the order of operations matters more than the ambition.

Editor's note: nobody ever decides to run 43 box sizes. You arrive there one urgent exception at a time.

Why do packaging SKUs multiply in the first place?

Nobody plans the sprawl. A retailer wants a different case pack. A new flavor launches and marketing wants its own carton. A supplier is out of the 12x9x4, so someone approves a 12x10x5 as a one-time substitute and it never gets retired. Multiply that by five years and you have a pack list nobody can defend line by line.

The macro trend is real, and it is not just small brands. Between 1998 and 2017, new SKU introductions across North America and Europe grew by roughly five and a half times, according to L.E.K. Consulting's annual brand-owner packaging study. Then the correction arrived. Pandemic-era supply shocks forced brands to run skinny portfolios, and a lot of them discovered they made more money that way.

What does rationalization actually save?

The margin numbers are less abstract than you would expect. L.E.K. estimated that SKU reduction contributed 65 to 90 basis points to brand-owner gross margins relative to 2019, with a further 150 to 175 basis points projected as the trimming continued. Unilever's CEO told investors the company was "striving for lower complexity with over 20% reductions in SKUs, raw and packed materials and number of suppliers," and Hain Celestial announced it would remove 62% of underperforming SKUs in its hair, skin, and sun care lines after already cutting 6% globally — both documented in Packaging Dive's reporting on the trend.

Those are enterprise numbers. The mechanism scales down cleanly, though, because the savings come from volume concentration rather than company size. Buy 15,000 units across four box sizes and you land in a different price bracket than 3,000 units across twenty. Same total spend. Very different invoice.

There is a second saving most teams never book: the cost of carrying a format at all. Tooling amortization, minimum order quantities, a pallet position in the warehouse, an SKU line in the ERP, a changeover on the line. We walk through how those hidden costs stack up in our piece on packaging total cost of ownership, and the minimum-order side of the equation deserves its own conversation with every supplier you keep.

How do you decide which packs to cut?

Start with data, not opinions. Pull twelve months of purchase history for every packaging item and sort by annual units consumed. The shape of that curve tells you almost everything.

The rule I hand clients is deliberately crude, because crude rules actually get used. Those are free cuts. Merge and move on.

The written justification part matters. Some low-volume packs genuinely have to exist: a regulated format, a key account's mandated case pack, a fragile SKU that fails in anything else. Fine. Write the reason down. What you are killing is the format that survives only because nobody remembered to ask.

What are the four moves available to you?

Every candidate pack resolves into one of four decisions:

• Keep. High volume, or low volume with a documented reason. Leave it alone and negotiate harder on price now that you know its share.
• Merge. Two near-identical formats collapse into one. The winner is usually the slightly larger one — void fill is cheaper than a second tooling run.
• Substitute. The product moves into an existing format from elsewhere in your range. Requires a drop test before you commit.
• Kill. Discontinue the format with the product it serves. The cleanest cut, and the one that needs sales sign-off.

Sequencing beats speed here. Run the merges first because they carry the least risk and fund the project politically, then tackle substitutions once you have test data, and leave the kills for the annual portfolio review where sales and finance are already in the room together. Our broader packaging cost reduction playbook covers the negotiation side once your consolidated volumes are locked.

Where does rationalization go wrong?

Here's my contrarian take: most rationalization programs fail not because they cut too much, but because they cut on unit price alone and ignore fit. The procurement line item looks great. The P&L doesn't.

The other common failure is going too far, too fast. Cut to the bone and your first supply disruption has no fallback format, because you eliminated every alternative that could have absorbed the volume. Redundancy has a price. It also has a value.

That said, the risk of doing nothing is worse and quieter. Every format you keep out of inertia is money sitting in a warehouse instead of in your margin, and it compounds every year you renew the order without asking whether the pack still earns its place. Track the effect on real numbers — pack count, average order quantity per format, obsolescence write-offs, damage rate — using the metric set in our guide to packaging KPIs every brand should track.

How often should you run this?

Once a year, tied to your budget cycle. Any more often and you are churning suppliers; any less and the sprawl outruns you. Sixty days is a realistic window for the audit, the tests, and the supplier conversations.

Fewer formats. Bigger orders. Better prices. That is the whole thesis, and the discipline is in refusing to add a pack without retiring one. Pull your twelve-month purchase history this week and sort it by volume — the bottom of that list will tell you where to start.