Amazon Handling Time Manager — Free Seller Tool

SKU

NO PRODUCTS YET

Add your Seller SKUs on the left. Assign each one as in-stock or ordered-in. Then generate the upload file.

HANDLING TIME
RULES & STRATEGY

// Amazon Seller Central · MFN (Merchant Fulfilled) only

What handling time actually means on Amazon

Handling time is the number of working days between a customer placing an order and you dispatching it — not the total delivery time. Amazon uses your handling time combined with the delivery carrier's estimated transit time to show the customer their expected delivery date. Setting it wrong in either direction costs you.

Under-promise on ordered-in items

If a product has to be ordered from a supplier before you can ship, the handling time should reflect the realistic lead time — not the optimistic one. A late dispatch triggers an Amazon late shipment rate defect. Enough defects and your account health is at risk. Set ordered-in handling time at your supplier's stated lead time plus one working day buffer.

In-stock items should be 0 or 1 day — nothing else

If the product is physically in your warehouse and ready to go, the handling time should be 0 (same day if ordered by cutoff) or 1 (next working day). Setting in-stock items to 2+ days when they don't need it pushes your delivery date out, reduces your competitiveness in search, and costs you Buy Box percentage against FBA sellers. Amazon's algorithm rewards fast, reliable dispatch.

Update handling time dynamically — don't set and forget

A product that starts in stock and sells out becomes an ordered-in product the moment you take the next order. If you don't update the handling time, you're promising a fast dispatch you cannot deliver. This tool is built for exactly this — run it regularly (weekly if you have fast-moving lines) to keep your Seller Central handling times current.

Mixed catalogues need product-level handling times

If you sell some items from stock and some to order, the Amazon default account-level handling time applies to everything. That means either your in-stock items look slow, or your ordered-in items show a dispatch promise you can't keep. You need product-level handling times. That is what this tool generates.

Handling time and late shipment rate are directly linked

Amazon's Late Shipment Rate (LSR) metric measures the percentage of orders you dispatch after the handling time you promised. If your LSR exceeds 4% over a 10-day period or 10% over a 30-day period, Amazon can deactivate your listings. Accurate handling times are not just a customer experience issue — they are an account health issue.

Amazon calculates delivery dates from dispatch — not order

Handling time + carrier transit time = promised delivery date. A 1-day handling time + 2-day carrier = 3 days from order. If you change your carrier or service level, the handling time in your product listing may need adjusting too. The two numbers are connected — optimise them together.

// Recommended handling times by product type

Product situation

Recommended HT

Notes

${[ ['In stock · packed and ready','0 days','Same day if cutoff met. 1 if no same-day cutoff.'], ['In stock · unpacked (pick & pack needed)','1 day','Standard for most MFN warehouse operations.'], ['Low stock (last few units)','1–2 days','Buffer for picking errors or stock discrepancy.'], ['Order from UK supplier · typically 2–3 day lead','4 days','Supplier lead + 1 day buffer. Never less than stated lead time.'], ['Order from EU supplier · 5–7 day lead','7–8 days','Include customs processing time for non-EU.'], ['Bespoke or made-to-order','10–14 days','Set exactly to your production + dispatch time.'], ['Out of stock · back-ordered','14–21 days','Or set quantity to 0 and update when stock arrives.'], ].map(([sit,ht,note])=>`

${sit}

${ht}

${note}

`).join('')}

IMPORT YOUR
EXISTING DATA

// Paste or upload a CSV with your current SKU list

Expected CSV format

Your CSV should have at minimum a seller-sku column. Optionally include: product-name (reference only), stock-status (instock/ordered), handling-time (override). Column headers are detected automatically — exact match or common variants.

Paste CSV data

↑

Or drop a .csv file here

CSV files only · headers detected automatically

HOW TO UPLOAD
TO SELLER CENTRAL

// Step-by-step · two methods

Important: this is for Seller Central (3P) only

Handling time management via flat file upload applies to Seller Central (Seller / 3P) MFN listings only — products you fulfil yourself. FBA listings are handled by Amazon's fulfilment centres and do not use seller-defined handling times. Vendor Central (1P) does not use this system at all — Vendor delivery windows are negotiated as part of the Vendor agreement.

Method 1 — Inventory Loader (bulk upload, any volume)

${[ ['Step 01','Log in to Seller Central','seller.amazon.co.uk · ensure you are on the correct marketplace'], ['Step 02','Navigate to Inventory','Inventory menu → Add Products via Upload'], ['Step 03','Download the template','Select Inventory Loader template · download the .txt file'], ['Step 04','Prepare your data','Open the template. The key columns are: seller-sku and handling-time. Paste your generated data — you can use columns from this tool\'s output directly. Leave all other columns blank if you only want to update handling time.'], ['Step 05','Save as tab-delimited .txt','File → Save As → Text (Tab delimited) · do not save as .xlsx or .csv'], ['Step 06','Upload the file','Back in Seller Central → Add Products via Upload → Upload your inventory file → Select your .txt file → Submit'], ['Step 07','Check the processing report','After a few minutes, download the processing report to confirm all SKUs updated without errors. Errors are usually: SKU not found (check for trailing spaces), handling time out of range (0–30 only), or wrong file format.'], ].map(([n,t,b])=>`

${n}

${t}

${b}

`).join('')}

Method 2 — Manage Inventory inline edit (up to ~50 SKUs)

${[ ['Step 01','Go to Manage Inventory','Inventory → Manage Inventory'], ['Step 02','Find the listing','Search for the SKU or scroll. Click the listing row.'], ['Step 03','Click Edit','Select Edit from the dropdown · go to the Offer tab'], ['Step 04','Find Handling Time','Scroll to Handling Time field · enter the number of days'], ['Step 05','Save','Click Save and Finish · change takes effect immediately'], ].map(([n,t,b])=>`

${n}

${t}

${b}

`).join('')}

Common upload errors and fixes

${[ ['SKU not found','The SKU in your file does not match the SKU in Seller Central exactly. Check for extra spaces, different capitalisation, or special characters.'], ['Handling time out of range','Amazon accepts 0–30. Any value above 30 will error. Check your ordered-in time is not set too high.'], ['File format error','The file must be saved as Tab-delimited .txt — not .xlsx, not .csv. Some systems save CSV with commas; the template requires tabs.'], ['FBA listings not updating','FBA listings do not support seller-defined handling time. Only MFN (Merchant Fulfilled) listings will accept this field.'], ].map(([e,f])=>`

✗

${e}
${f}

`).join('')}

STOP LOSINGTHE BUY BOXTO DISPATCH.

STOP LOSING
THE BUY BOX
TO DISPATCH.