WMWidenMargin
All tools

All free tools and guides

Pick the marketplace you sell on. Free, no account.

Amazon.com (US)

In dollars. Every one runs in your browser: what you type and any report you open stay on your device.

Get back what Amazon owes you

Lost & damaged inventory finderCheck Amazon actually paid for units it lost or damaged — ledger vs reimbursements, with the 60-day deadline. No login.Refunded-but-not-returned finderFBA refunds where the item never came back and Amazon hasn't reimbursed you — with the day-45-to-105 claim window.

Check your payouts

Settlement report analyzerDrop in your Amazon settlement report and see profit per SKU. The file is read in your browser, never uploaded.FBA reimbursements analyzerSee what Amazon reimbursed for lost, damaged and fee-corrected units — by reason and SKU, reversals included.Settlement profit calculatorSales minus Amazon fees, ads, refunds and reserve: the profit a payout really leaves, from figures you type.

Price, ads and fulfillment

FBA profit & break-even ACOSNet profit, margin, ROI, break-even ACOS and break-even price from your own price, cost and fees.PPC / ACOS calculatorYour break-even ACOS and ROAS, whether your current ACOS is profitable, and the target ACOS for a profit goal.FBA vs FBMNet profit per unit for Amazon fulfillment vs shipping it yourself, side by side. See which wins.

Stock and sales tax

Reorder point & safety stockWhen to send your next FBA shipment and how many units, from your daily sales and supplier lead time.FBA sales-tax state mapWhich US states your FBA inventory may require sales-tax registration in — 51 jurisdictions, each cited to the state.

Guides

Amazon.in (India)

The GST, compliance and payout maths sellers usually pay a CA for. The APOB plan, tax estimator and TCS reconciliation work on our server; each says so above its button.

Settlement report analyser

Open your own settlement report and see the payout line by line — fees, refunds, reimbursements, TCS, TDS, reserve and profit per SKU. Runs in your browser; the file is never uploaded.

APOB filing helper

A free APOB filing plan for an Amazon FC: intra- vs inter-state verdict, steps, documents, pre-filled fields. 13 FCs across 9 states.

Amazon FC GST guides

Which GST registration each Amazon.in fulfilment centre needs, REG-14 → REG-06 steps, state by state.

Printable FC → GST checklist

All 13 covered Amazon FCs on one page: address, GST state code and tick-box REG-14 → REG-06 steps. Print or save as PDF.

Settlement report guide

What's in an Amazon.in settlement report, why it never matches your order-side sales, and every fee defined from Amazon's own help pages.

Settlement profit calculator

Sales minus fees, ads, refunds, TCS 0.5%, TDS ~0.1% and reserve: the profit your payout really leaves.

Reorder-point calculator

Safety stock, reorder point and order quantity for your next FBA shipment.

VPOB provider directory

7 curated VPOB providers, filterable by state. Routing only — we don't resell.

TCS reconciliation

Upload your Amazon settlement CSV; surface monthly TCS totals to match against GSTR-2A.