Restock Limits

TL;DR

Restock limits are Amazon's caps on how many units you can ship into FBA, set per storage type (standard, oversize, apparel, footwear, hazmat). They tighten when your IPI drops below 400 or category-level constraints hit, and they reset roughly every 14 days.

Amazon FBA Restock Limits Definition

Amazon FBA restock limits are the inventory caps Amazon imposes on each seller account, expressed as both unit counts and shipment volume per storage tier. They are calculated at the account level, not the SKU level, which means a hot-selling product can starve out a slower SKU if you do not allocate buy plans manually. The numbers update on a rolling 14-day cadence, usually visible inside Seller Central > Inventory > Shipments > Restock Inventory.

The cap depends on three inputs Amazon weighs together: your IPI score, your historical and forecasted sales, and the category-level capacity Amazon has allocated to that storage tier in that quarter. A new private label account starts with a small allocation, which expands as sales history builds. Existing accounts that drop below the IPI threshold (currently 400) get cut, sometimes by 50% within one cycle.

Amazon FBA restock limits are not the same as long-term storage fees or the aged inventory surcharge. Those are dollar penalties on units already in FBA. Restock limits gate what you can send IN.

How Amazon calculates restock limits

FORMULA (APPROXIMATE)
Restock allocation per storage tier =
base_allocation_for_account_tier
+ (90-day_sell_through_velocity × forecast_multiplier)
− (excess_inventory_units > 90_days_supply)
− IPI_penalty_if_below_threshold
// Updated: every ~14 days
// Visible at: Seller Central > Inventory > Shipments > Restock Inventory

Example: a $1.4M wholesale seller

A wholesale seller doing $1.4M annually across 32 SKUs (average ASP $42, average lead time 22 days domestic, 65 days international) opens Restock Inventory on April 18, 2026:

Standard-size: 8,400 unit limit, 6,100 units inbound or in stock = 2,300 units of headroom
Oversize: 1,200 unit limit, 1,150 units in stock = 50 units of headroom (effectively at cap)

Their bestseller burns 820 units per week. The oversize tier is constrained: any reorder of the bestseller has to wait for Amazon’s next 14-day reset, OR they need to send the shipment to AWD instead and pull it forward in batches. Sending 1,200 oversize units to AWD pulls 1,200 units OUT of FBA-counted inventory, freeing oversize headroom for the bestseller within days.

The reset window matters. If they place a domestic PO on April 18 with a 22-day lead time, the shipment arrives roughly May 10. By then, two restock-limit refreshes will have occurred, and the limit may already accommodate the new units.

Why restock limits matter for FBA sellers

Amazon FBA restock limits ratchet harder against accounts that ship in slow movers. The sell-through rate component is calculated per-account, not per-SKU, so dragging a low-velocity SKU lowers the entire account’s velocity and shrinks limits across every storage tier. Pruning the slow tail before peak season is one of the highest-leverage moves a $1M-$5M seller can make.

The other quiet driver is category capacity. Amazon allocates a finite pool per storage tier per quarter. If your category gets squeezed (apparel and oversize routinely tighten in Q4), even a strong-IPI account loses headroom. Plan Q4 buys against the Q3 limit, not the Q1 limit. Using AWD as a buffer gives you overflow capacity without eating into your Amazon FBA restock limits.

Where this shows up in Profit Hawk

Profit Hawk pulls your live restock limits from Seller Central each day and shows you headroom per storage tier alongside your projected reorders. When a reorder would push a tier over cap, it flags the SKU and proposes splits across AWD or staggered ship dates so you don't end up with rejected pallets at the warehouse. Start a free trial.

Common mistakes

Treating limits as static. They reset every 14 days; reorder math should look forward to the next reset window, not the current one.
Buying to fill the limit. Headroom isn’t an obligation. Buying inventory just because you have capacity is how aged inventory accumulates and IPI drops.
Ignoring the AWD lever. Pulling slow units off Amazon into AWD raises sell-through rate and frees IPI plus restock headroom in 30-60 days.

Related terms

Frequently asked questions

How often do restock limits update?

Roughly every 14 days. The numbers Amazon shows in Seller Central refresh as your sell-through, IPI, and category-level allocation change. Don't make buying decisions off a single snapshot.

Can I get my restock limit increased?

Indirectly. Sell faster, keep IPI above 400, and reduce excess inventory. There's no support ticket that increases limits manually unless you've been wrongly flagged for a category cap.

Are restock limits the same across all accounts?

No. They're set per account based on history, IPI, and category capacity. New accounts start small. $5M+ sellers in good standing typically have unlimited or near-unlimited standard-size limits.

Does AWD inventory count toward my restock limit?

AWD is a separate storage layer. Inventory in AWD does not count against your FBA restock limit. Units transferred from AWD into FBA do count when they arrive at fulfillment centers.

What happens if I exceed my restock limit?

New shipments past the cap are rejected at receipt. The fix is to lower in-stock units (sales, AWD transfer, removal), wait for the limit reset, or split shipments with future ship dates.

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