Amazon PO On-Time Accuracy Chargeback: The Window Problem

Executive Summary & Quick Answer

Executive summary: Every Amazon purchase order carries a fulfillment window and a cancellation date, and the PO On-Time Accuracy chargeback is what happens when your units don't respect them. Ship outside the window, or arrive after the cancel date, and Amazon assesses a per-unit fee for units not received in time. The trap most vendors fall into is confirmation optimism: confirming quantities they hope to deliver rather than quantities they can deliver, because a confirmed unit that misses the window is a charged unit. This is a planning chargeback — the fix lives in your order-management calendar, not your warehouse. Charges appear in Vendor Central's operational performance dashboard; disputes go through Vendor Central support cases.

Quick answer: Amazon's PO On-Time Accuracy chargeback is a Vendor Central operational fee applied when items are not shipped within the purchase order's specified window or arrive after the PO cancellation date. Amazon charges a per-unit fee for units not received within the window. Prevention: confirm only deliverable quantities and triage at-risk POs daily.

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Deep Dive: One PO, Two Deadlines

The purchase order arrives as an EDI 850, and buried in it are the two dates that decide whether you get paid clean: the ship window and the cancellation date. The chargeback fires on either failure — shipping outside the window, or arriving after the cancel date. Three of the record's causes are really one discipline problem seen at three moments:

EDI 850 arrives ──► you confirm ──► ship window opens ──► window closes ──► cancel date
                        │                                       │                │
                 confirm only what              ship inside ────┘        arrival after this
                 you can deliver                the window               = charged units

Failure	Moment it was decided	The tell
Shipped outside the ship window	Scheduling / carrier booking	Freight booked to your calendar, not the PO's
Arrived after the cancel date	Transit planning	No transit-time buffer between ship date and cancel date
Confirmed units missed the window	Confirmation	Confirmed from gross inventory, not allocatable stock

The third row is the one worth staring at. Confirmation is where this chargeback is actually created or prevented: a unit you never confirm can't miss its window, while a unit you confirm and can't deliver is a fee you scheduled for yourself. On-time performance is a confirmation-accuracy problem wearing a logistics costume.

Note the counterpart risk: shipping units you never confirmed triggers a different fee — the Unconfirmed PO Units chargeback. The two codes fence you in from both sides, which is Amazon's point: the confirmation should be an exact, deliverable commitment.

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Business & Financial Impact

• Fee structure: a per-unit fee for units not received within the PO window, per Amazon's vendor terms. No universal dollar figure is published in the record — verify your rate in your agreement.
• Scales with volume: per-unit math means big POs create big exposure; one late truckload can carry thousands of charged units.
• Lost sales on top: units arriving after the cancel date risk being units Amazon no longer wants — the fee compounds a revenue miss.
• Forecast feedback loop: chronic lateness degrades Amazon's confidence in your supply, which is a commercial problem beyond the chargeback line.
• Dispute posture: disputes via Vendor Central support cases turn on dates — PO window, confirmation, ship date, delivery evidence. Vendors without a clean date trail rarely win.

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Root Causes (Ranked)

1. Optimistic confirmation. Confirming from gross inventory or hoped-for production, so confirmed units miss the window.
2. No PO-window visibility. Windows live in the 850 but never make it onto anyone's operational calendar; POs age silently until they're at risk.
3. Carrier booking to internal cadence. Freight moves on your weekly schedule regardless of when each PO's window closes.
4. No transit buffer against the cancel date. Shipped "on time" but with transit time that math says arrives after cancellation.
5. At-risk POs discovered too late. No daily triage, so the first signal of lateness is the chargeback itself.

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Step-by-Step Prevention Workflow

1. Extract both dates at 850 receipt. Ship window and cancel date go straight into your order calendar the moment the PO lands.
2. Confirm against allocatable inventory only. The confirmed quantity is a commitment, not a forecast. Under-confirm rather than over-promise.
3. Back-schedule from the cancel date. Required ship date = cancel date minus lane transit time minus a safety buffer. Book carriers to that date, not to your routine.
4. Run a daily at-risk report. Every open PO scored by days-to-window-close vs readiness; expedite or re-plan while options still exist.
5. Reconcile weekly. Match dashboard charges to your date trail; dispute charges where your evidence shows in-window fulfillment, fix planning where it doesn't.

850 in ──► dates on calendar ──► confirm deliverable qty ──► daily triage
                                                                 │ at risk?
                                                                 ▼
                                                     expedite / re-plan early

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PO On-Time in the Amazon Chargeback Family

Chargeback	What Amazon is grading	Where the failure lives
PO On-Time Accuracy	Fulfillment within the PO window	Planning and logistics
Unconfirmed PO Units	Shipping only confirmed units	Order confirmation process
ASN Accuracy	Ship-notice data vs receipt	EDI pipeline
Carton Content Accuracy	Carton detail vs physical cartons	Pack station and labels
Prep	Physical prep requirements met	Packaging line

Related: Unconfirmed PO Units · ASN Accuracy

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Supplier Checklist

• Ship window and cancel date captured from every 850 at receipt
• Confirmations limited to allocatable, deliverable inventory
• Required ship date back-calculated from cancel date + transit
• Daily at-risk PO report reviewed and acted on
• Carrier bookings tied to PO dates, not internal cadence
• Weekly: dashboard charges reconciled against the date trail

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FAQs

What is Amazon's PO On-Time Accuracy chargeback? A Vendor Central operational chargeback applied when items are not shipped within the purchase order's specified window or arrive after the PO cancellation date — the order was not fulfilled on time.

How much does it cost? A per-unit fee for units not received within the PO window, set by Amazon's vendor terms. Published sources don't fix a universal amount — check your own agreement.

Does confirming a PO protect me if I ship late? The opposite. Confirming units that then miss the delivery window is one of the listed causes of the charge. Confirmation is a commitment; only confirm what you can deliver in the window.

What if I ship on time but the carrier delivers after the cancel date? Arrival after the PO cancel date is a trigger regardless of intent, which is why planning must include lane transit time plus buffer, not just the ship date.

Is this the same as the Unconfirmed PO Units chargeback? No. PO On-Time charges confirmed units that arrive late; Unconfirmed PO Units charges units received that were never confirmed at all. They're complementary — one punishes over-promising, the other punishes shipping outside the promise.

Where do I dispute the charge? Through a Vendor Central support case, with your PO dates, confirmation record, ship documents, and delivery evidence. Clean date documentation is the whole case.

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