The 90-day sell-through gate: how retailers actually decide whether your new SKU survives launch.

Most automotive vendors plan for the line review and the launch PO. Very few plan for week thirteen, which is the moment that quietly decides whether the SKU they just spent eighteen months winning actually stays on shelf.

The 90-day sell-through gate is the internal review every major retailer runs on every new SKU about ninety days after first store delivery. It's not a meeting you attend. It's not a number you're given. It's a quiet calculation the category manager runs against the new-item performance threshold, and on the wrong side of it your SKU is on the cut list for the next reset.

Here's how the gate actually works, what the buyer is looking at, and the levers that move it — most of which have to be in motion before week one, not after week thirteen.

What the 90-day gate actually measures

The ninety-day window starts the week the SKU clears DC and hits store shelves on the new planogram. From that date forward, the retailer's category analytics system is collecting four numbers on your SKU and benchmarking each one against the category set:

1. Units per store per week (UPSPW). The single most-watched number. Retailers compare your velocity against the category average, against the SKU you replaced, and against the in-store position-matched benchmark for new items.
2. Sell-through rate. Units sold divided by units shipped into the store. A high UPSPW with low sell-through means you've over-shipped — which the retailer notices and the DC absorbs.
3. Store presence. What percent of authorized stores actually have the SKU on shelf, faced, priced, and scanning. New items routinely launch at 78–88% store presence because of slow restock cycles, missing tags, or lost cases in the DC. Below 90% by week six is a flag.
4. Return rate. First-90-day returns as a percent of units sold. A clean SKU runs under 2%. Anything above 4% is a category-level red flag.

The buyer doesn't see these in real time, but the system flags them at week six, week ten, and week thirteen. Week thirteen is the gate.

The benchmark you're being graded against

Most retailers use a simple internal rule for new SKU survival: your UPSPW at week thirteen must clear 80% of the category average for the planogram position you occupy. Some retailers use 75%, some use a sliding scale weighted by category. The 80% rule is the rough industry shorthand.

What that means in practice on a wiper program at a 3,800-store chain:

• Category average UPSPW for the mid-tier wiper rung: 5.2 units / store / week
• 80% threshold: 4.16 units / store / week
• Your new SKU at week 13: 3.8 units / store / week

You're under the gate by 9%. The buyer's system flags it. At the next category review meeting — usually within 30 days of the gate hitting — your SKU is in the bottom-quartile bucket. Three or four meetings later, at the next planogram reset, you're cut.

The vendors who survive the gate aren't the ones with better products. They're the ones whose products show up at week thirteen with the velocity numbers already healthy, because of decisions made in weeks one through six.

The first thirty days decide the next sixty

New-item velocity is sticky. A SKU that launches strong tends to stay strong. A SKU that launches soft rarely recovers. The reason isn't consumer behavior — it's planogram dynamics. A slow-mover gets less restocker attention, gets moved to a worse facing position at the first courtesy reset, and quietly fades from sight. By week six the SKU has been graded by the system, by the restocker, and by the shopper, and all three are reinforcing each other.

What that means: the first thirty days are not a learning period. They are the launch. Three operational levers that decide the outcome:

1. Store presence at week two. If you're below 90% store presence by the end of week two, the velocity number is broken from day one. The fix is a launch-week store audit — a paid retail-service company or a regional rep network that walks 200–400 stores in the first ten days and reports missing SKUs back to the retailer's replenishment team. Budget $4–$8 per store audited. A 400-store audit at $6 is $2,400. A weak launch from missing store presence costs you the program. The math is unambiguous.

2. Pricing accuracy at week two. Roughly 6–9% of new SKUs launch with the wrong shelf tag — old price, wrong price, missing tag, or a tag positioned next to a different SKU. Consumers scan, see a mismatched price at the register, and the buyer's exception system flags it. A bad shelf tag in week two costs you velocity from week three onward because consumers stop trying the SKU. The fix is the same store audit — but with photos of the shelf tag, not just a presence check.

3. POP and signage placement. End-cap weeks, clip strips, and shelf-talker signage are not promotion — they are velocity insurance for the first ninety days. A new SKU with a shelf-talker pulling attention runs 18–35% above the same SKU without one. The signage is cheap. The velocity lift it produces is the difference between clearing the gate and not.

The week-13 internal review you should be running

The smart move is to run the retailer's review on yourself, two weeks ahead of the gate. By week eleven, you should have:

• Pull-through velocity data from the retailer's vendor portal — Walmart's Retail Link, AutoZone's vendor analytics, O'Reilly's vendor extranet. Every major retailer publishes UPSPW data to vendors. If you're not pulling it weekly, you're flying blind.
• Store-level cuts of the data. Which stores are above category average. Which are below. Which are at zero. The zero-velocity stores are usually a store-presence problem, not a demand problem.
• A comparison against the SKU you replaced if the retailer's portal supports it. If your SKU is doing 85% of the velocity of the SKU it replaced, you've lost the category-level conversation already.
• A return-rate cut at SKU level. Returns lag sales by 30–60 days, so by week eleven you have a real number, not a theoretical one.

If any of those numbers are soft, you have two weeks to put a corrective program in place — additional store audits, a localized TPR, a clip-strip rotation — and to brief the buyer on what you're doing about it. Showing up at week thirteen with a soft number and no plan is how SKUs get cut. Showing up at week eleven with a soft number, a plan, and the first two weeks of corrective data is how SKUs get a second chance.

The math on a missed gate

Pretend you launch a 12-SKU program. Two of those SKUs miss the 90-day gate. Run the cost:

• Slotting amortized across SKUs: $12,000 average per SKU. Two cut SKUs = $24,000 unrecovered slotting.
• Free-fill PO inventory still in DCs: roughly 8 weeks of supply per cut SKU at $4.20 cost × 1,800 units/week × 8 = $60,480 per SKU, $120,960 for both.
• Returns flowback on the cut SKUs as DCs reverse-logistics: typically 50–60% recovery. $48–60K loss on inventory.
• Re-stocking labor at retailer: charged back to vendor at $1.85 per case across 3,800 stores × 2.5 cases = $17,575.

Net vendor loss on two cut SKUs: roughly $210,000 to $230,000, plus the opportunity cost of two slots that won't be available again for 12–18 months. The math on cutting one survey audit to save $2,400 looks different in that light.

Building 90-day discipline into the launch plan

Three things every vendor should have in the launch calendar before the first PO ships:

1. A week-2 store audit budget, scoped to 8–12% of authorized stores at minimum, with photo evidence of facings, pricing, and any out-of-stock conditions. Findings reported directly to the retailer's replenishment team within 48 hours of the audit.
2. A week-6 velocity review against the category benchmark, with a specific action plan for any SKU running below 90% of expected UPSPW. Two weeks is enough time to deploy a clip strip, a TPR, or a localized end-cap intervention.
3. A week-11 pre-gate briefing prepared for the buyer, with portal-pulled data and any corrective actions you've already taken. The act of showing up two weeks ahead of the gate signals to the buyer that you're an operator, not a one-time vendor.

What this means for your next line review

Vendors talk about line reviews as the moment of truth. They aren't. The line review is the audition. The 90-day gate is the moment of truth, and it gets decided in the operational decisions made before week six.

When the buyer asks about your launch plan, talk about week-2 audits, week-6 velocity checks, and week-11 pre-gate briefings. That answer marks you as someone who has been through the gate before, not someone who's about to learn what it is. The vendors who survive their first gate get invited back for a second program. The ones who don't go back to the conference circuit looking for the next retailer to pitch.

The shelf doesn't decide. The first ninety days do. Plan accordingly.