Amazon FBM SKU handling time required from June 29, 2026

What's happening

Amazon notified seller-fulfilled merchants this week that starting June 29, 2026, every seller-fulfilled SKU that needs handling time must carry an accurate SKU-level setting. Sellers can comply by enabling Automated Handling Time, or by maintaining manual SKU-specific handling time. Accounts that do neither will have an automated handling time assigned by Amazon based on each SKU's recent confirmed handling history (DAM Law Firm coverage).

Amazon's stated rationale is conversion: per the notice, each day of improvement in promised delivery time correlates with an average 5% lift in sales, and more than 87% of US seller-fulfilled orders today ship within one day. Custom, handmade, and Heavy and bulky less-than-truckload SKUs are explicitly excluded. The official mechanics — what Automated Handling Time uses as input, how exclusions are scoped, how to override at SKU level — live in Amazon's Manage your handling time help page. A separate logistics-side breakdown of the June 29 rollout, including the interaction with rising delivery-speed standards, is available from Forest Shipping's coverage of the June 29 handling time rules.

For FBM operators, the risk is not the conversion lift Amazon advertises. It is what happens when an automated handling time gets set against a recent confirmed history that does not reflect normal operations: tighter promised delivery dates, higher Late Shipment Rate exposure, more A-to-z claims, and account-health drift on the SKUs that need the most prep work.

Key facts at a glance

How we got here

Automated vs manual: how to choose

The strongest accounts will mix both paths: Automated Handling Time on the SKUs where shipping cadence is genuinely consistent, and manual SKU-specific settings on the long tail where prep complexity makes the recent-history assumption dangerous.

What FBM sellers should do before June 29

1. 1

   Pull every active seller-fulfilled SKU and flag the ones using account-level handling time

   Anything still on the default catalog setting is the highest priority. These are the SKUs most likely to get an automated handling time that does not fit their prep profile.

2. 2

   Segment the catalog by prep profile

   Group SKUs by what actually drives shipping time: same-day pick-and-pack, bundled or kitted, fragile or inspected, third-party-warehoused, supplier-confirmed, seasonal. Each segment gets a different handling time default.

3. 3

   Audit the last 90 days of confirmed handling times

   If you plan to enable Automated Handling Time on a segment, look at p95 handling time, not the average. Amazon's automation will tighten the promise toward your recent best case, which is rarely your real capacity.

4. 4

   Re-rate margin on bulky-but-light and FBM-only SKUs

   Tighter promised delivery dates push more SKUs toward expedited carrier services. Recalculate contribution margin in Profit & Loss so the new shipping mix is visible at SKU level, not buried in a monthly average.

5. 5

   Set a Late Shipment Rate alert from June 29

   Watch LSR daily for the first 30 days after go-live in Day-to-Day Performance. Any drift above 4% is an early signal that an automated handling time was set too tight on a segment.

Where this fits in the 2026 FBM picture

Handling time does not move alone. Amazon has been tightening the seller-fulfilled operating contract all year, and the June 29 change stacks on top of policies that already reprice the cost of running FBM.

• Amazon tightens SFP delivery speed rules July 6, 2026 - the parallel speed-bar increase for Seller Fulfilled Prime, including a per-ZIP delivery promise tool.
• FBM refund window extended to 4 days - the policy change that gave FBM operators more inspection time before refund.
• CSBA upgrades - the assisted-CX lever for FBM sellers who do not want to rebuild ops against the new bar.

How Nova helps

Nova is the operating system for Amazon brands. When a fulfillment policy changes, the brands that win are the ones that see Late Shipment Rate, refund leakage, and SKU-level margin shift the same day, not at month close.

• Profit & Loss - reconciles 40+ Amazon fee types and refund deductions at SKU level so tighter handling-time promises do not quietly compress contribution margin on FBM SKUs.
• Day-to-Day Performance - daily Late Shipment Rate, cancellation rate, and refund-rate trends so segment-level handling-time misses surface inside 24 hours, not at the next account-health hit.
• Custom Breakdowns - split LSR, refund-rate, and margin by fulfillment channel, prep profile, and ZIP zone without exporting to a spreadsheet.
• Seller Cockpit - 200+ Amazon metrics in one place, including LSR, on-time delivery rate, and account-health signal, refreshed hourly across 21 marketplaces.
• For FBA and FBM sellers - how Nova helps mixed-fulfillment brands keep FBM and FBA operations on the same P&L.