Every major marketplace tracks a rolled-up "account health" or "seller standards" status built from a handful of underlying metrics, and every one of them can restrict your ability to sell if those metrics fall below a threshold. Understanding this system before your first sale, rather than discovering it after a warning notification, is one of the highest-leverage things a new seller can do.

The metrics that show up across almost every platform

  • Order defect rate — a composite of negative feedback, claims, and chargebacks as a percentage of your orders.
  • Late shipment rate — the percentage of orders shipped after their promised ship date.
  • Cancellation rate — orders you cancel after the buyer has already ordered.
  • Valid tracking rate — the percentage of orders with on-time, valid tracking information uploaded.
  • Return dissatisfaction rate, on some platforms — a measure of how buyers rate their returns experience, distinct from the return itself.
  • Customer response time, on platforms with a direct messaging expectation — how quickly you respond to buyer inquiries.

Why this system exists

Marketplaces compete on buyer trust — a bad experience with any one seller reflects on the platform as a whole, which is why every major marketplace enforces these metrics fairly strictly, sometimes with automated (not human-reviewed) consequences when thresholds are breached. From the marketplace's perspective, a single bad seller experience doesn't just cost that seller a sale — it can quietly erode a buyer's trust in the entire platform, so aggressive enforcement is a rational, if sometimes frustrating, response.

How these metrics are typically calculated

Most platforms calculate these as a rolling percentage over a trailing window (commonly something like the last 30, 60, or 90 days, though the exact window varies by platform and by metric). This means:

  • A single bad week can meaningfully move your metric if your overall order volume is still low — a new seller with only 20 total orders is far more exposed to one late shipment than an established seller with thousands of orders.
  • Metrics "age out" of the calculation over time as the rolling window moves forward, so a past problem doesn't follow you indefinitely once you've demonstrably fixed the underlying cause — but it can take the full window length to fully clear.

What happens if you fall below a threshold

Consequences escalate:

  1. Warning/notification — usually the first response, informing you a metric is approaching or has crossed a warning threshold, often with guidance on what to fix.
  2. Listing-level restrictions — loss of Buy Box eligibility, restricted ability to add new listings, or removal from certain promotional placements.
  3. Account-level restriction or suspension — if the pattern continues or a serious single violation occurs (for example, a safety-related complaint or a serious policy violation, which can trigger faster, more severe action than a purely metrics-based issue).

See Account Health Metrics, Compared for the platform-by-platform specifics, and My Account Was Suspended — What to Do First if you're already dealing with a restriction.

A worked example

A new seller launches with a single product and, in their first two weeks, has three orders ship a day late because they underestimated how long their supplier takes to hand off inventory. With only 15 total orders in that period, three late shipments is a 20% late-shipment rate — likely far above most platforms' warning thresholds, even though it's "only three orders." The seller receives a warning notification. Because their overall metric calculation uses a rolling window, fixing the underlying shipping process immediately and shipping every subsequent order on time will gradually bring the rate back down as the early bad orders age out of the calculation — but if volume stays low, it can take weeks to fully recover, which is exactly why catching and fixing the issue on day one matters more than it might seem for "just three orders."

The practical takeaway for new sellers

Treat these metrics as a daily/weekly check from your very first sale, not something to worry about later — a bad first month of shipping delays while you're still learning your fulfillment process can create a metrics problem that takes months to fully recover from, even after you fix the underlying cause, particularly while your order volume is still low enough that a handful of bad orders skews the percentage heavily.

Best practices

  • Check your account health/scorecard dashboard on a fixed schedule (weekly, at minimum, and daily during your first month) rather than waiting for a warning notification to look at it for the first time.
  • Build in a shipping-time buffer during your first few weeks while you're still calibrating your actual fulfillment speed, rather than promising the fastest possible ship time from day one.
  • Respond to buyer messages and disputes quickly — response time and how disputes are handled often factor into these metrics directly or indirectly.
  • Document your process for handling cancellations and returns so metric-affecting decisions are made consistently rather than ad hoc.

Common mistakes

  • Not checking account health metrics until receiving a warning notification, missing an early opportunity to course-correct before the threshold is crossed.
  • Assuming low order volume means metrics "don't matter yet" — the opposite is often true, since low volume makes each individual order have an outsized percentage impact.
  • Treating a single warning as an emergency requiring drastic action, when a calm, consistent fix to the underlying process is usually the correct (and sufficient) response.
  • Not understanding that metrics are rolling, and expecting an instant reset the moment the underlying issue is fixed rather than a gradual recovery as the window moves forward.

FAQs

How quickly can a bad metric recover once I fix the underlying issue? It depends on the platform's specific rolling window and your order volume — recovery is gradual as old, problematic orders age out of the calculation, not instant, so expect it to take at least as long as the stated measurement window to fully clear.

Does a single late shipment or cancellation risk suspension? Generally no — a single incident rarely triggers suspension on its own; it's a pattern crossing a threshold (or, separately, a serious individual policy violation) that typically leads to real consequences.

Are account health standards the same across Amazon, Walmart, and eBay? The underlying concepts (defect rate, shipping performance, cancellation rate) are broadly similar, but the specific metric names, thresholds, and dashboards differ by platform — see Account Health Metrics, Compared for the specifics.