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The Aged Inventory Surcharge Screen ​

Access via: Reports → Storage Fees → Aged Inventory Surcharge

Overview ​

Every month, Amazon takes a snapshot of your FBA inventory on the 15th and applies an Aged Inventory Surcharge (formerly called the Long-Term Storage Fee) to every unit that has been sitting in a fulfillment center for 181 days or longer. The charge appears on your settlement between the 18th and 22nd of the month, and the rate climbs steeply with age — the jump at 271 days is especially punishing.

The Aged Inventory Surcharge screen gives you the full picture in one place:

  • What you were actually charged on the last invoice, per SKU
  • What Amazon is about to charge you at the next snapshot
  • Which SKUs are approaching the expensive age tiers, so you can act before the fee hits

Aged Inventory Surcharge = Long-Term Storage Fees

Amazon renamed the Long-Term Storage Fee to the Aged Inventory Surcharge (AIS). They are the same charge — if you're looking for "long-term storage fees", this is the screen.

Summary Tiles ​

Four tiles at the top of the screen summarize your current exposure:

  • AIS Charged (Last Invoice) — the total surcharge on your most recent invoice, with the snapshot date it was based on, and a colored age-band bar showing how the charge splits across age tiers. Shows "No surcharge invoiced yet" if Amazon has not billed you.
  • Estimated Next Snapshot — what the upcoming snapshot is projected to cost, with the snapshot date and the billing window (billed 18th–22nd). Hover over the tile to see whether the figure is a sales-adjusted projection (expected sales until the snapshot are deducted, oldest inventory first) or Amazon's raw planning estimate.
  • SKUs in 181–270d Tiers — how many SKUs currently sit in the early surcharge tiers, with the unit count and estimated cost. These products are approaching the 271-day rate cliff — the cheapest moment to intervene.
  • SKUs at 366+ Days — how many SKUs are in the oldest tiers, charged at the highest surcharge rates, with the unit count and estimated cost.

Age-Band Breakdown ​

The tiles include a stacked bar that splits your exposure into three color-coded age bands:

  • 181–270 days (amber) — surcharges have started, but rates are still moderate
  • 271–365 days (orange) — past the 271-day cliff; rates rise sharply
  • 366+ days (red) — the highest rates Amazon charges

Hover over any band to see its estimated amount and unit count.

Sales-Adjusted Forecasting ​

The "Estimated Next Snapshot" figure is smarter than Amazon's own planning estimate. Every day, SellerLegend:

  1. Takes Amazon's current per-tier surcharge estimates for each product
  2. Calculates each product's sales velocity over the last 90 days
  3. Deducts the units you are expected to sell before the snapshot date — consuming the oldest inventory first, exactly as Amazon's first-in-first-out aging works

The result is a projection of what you will actually be charged, not what you would be charged if nothing sold between now and the 15th. When a fresh forecast isn't available, the screen falls back to Amazon's raw planning estimate and the tooltip tells you so.

The Surcharge Table ​

Below the tiles, the table lists every line from your Aged Inventory Surcharge invoices — one row per product, per snapshot. By default it is sorted by most recent snapshot, largest charge first.

Columns ​

  • Product — thumbnail image, clickable to open the Product Dashboard
  • SKU — the product's SKU
  • ASIN — clickable link to the Amazon catalog listing
  • Parent ASIN — the parent ASIN (hidden by default)
  • FNSKU — the product's FNSKU
  • Snapshot Date — the inventory snapshot the charge was calculated from
  • Surcharge Age Tier — the age tier the units fell into (e.g. 271–330 days)
  • Qty Charged — the number of units the surcharge applied to
  • Per Unit Volume — the volume of a single unit, with its measurement unit
  • Surcharge Rate — the rate Amazon applied for this tier
  • Amount Charged — the resulting charge, converted to your display currency
  • Country — the marketplace country the charge belongs to

Filters, Views, and Export ​

The table supports the standard SellerLegend table features:

  • Per-column filters in the Filters quickview (ASIN and Parent ASIN offer autocomplete), plus free-text search
  • Saved table views, column show/hide, and sorting
  • Export to CSV or Excel via the Exports button
  • The marketplace/account switcher and the global currency selector — all monetary columns respect your display currency

Note that unlike the Monthly Storage Fees screen, this screen intentionally has no date-range picker on the tiles: aged-inventory exposure is a current-state metric, and the table always keeps your full invoice history available.

Home Dashboard Widget ​

A matching Aged Inventory Surcharge widget on the Home dashboard keeps your exposure visible at a glance:

  • Charged (last invoice) with its snapshot date
  • Estimated next snapshot with the snapshot and billing dates
  • The same three-band age breakdown bar
  • A footer line with the SKU counts in the 181–270d and 366+ day tiers
  • A button linking straight to the Aged Inventory Surcharge screen

The widget shows current-state exposure and deliberately ignores the dashboard date range. It appears automatically for existing users and can be hidden via the dashboard's Show/Hide Widgets control like any other panel. If you have no exposure, it shows "No aged-inventory surcharge exposure".

Where the Data Comes From ​

  • Invoiced charges come from Amazon's monthly Aged Inventory Surcharge report — the same data as the report of that name in Seller Central. SellerLegend fetches it automatically after Amazon's billing window closes each month.
  • Estimates come from Amazon's FBA Inventory Planning data and are refreshed daily.
  • Forecasts (the sales-adjusted projection) are recomputed daily from the estimates and your recent sales velocity.

A small number of invoice rows may not match a product in your catalog (for example, a deleted listing); these rows are kept in the table — with the SKU/FNSKU Amazon reported — so your totals always reconcile with the invoice.