SellerMatrix Blog

Know your numbers. Then know what to do about them.

Practical, no-fluff guides for Amazon FBA sellers — true profit, VAT, ACOS and TACOS, stock, and the weekly decisions that actually move the needle. Written for UK and US sellers.

Amazon seller accounting spreadsheet · 4 Nov 2026 · 10 min read

Amazon Seller Accounting Spreadsheet: DIY Blueprint

Build an amazon seller accounting spreadsheet with six tabs, exact formulas, and settlement reconciliation to see true net profit per unit every week.

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Amazon uk fba fees calculator · 4 Nov 2026 · 10 min read

Amazon UK FBA Fees Calculator: UK, AU, CA, IN Compared

Use an amazon uk fba fees calculator to compare net profit per unit across UK, Australia, Canada and India, including VAT, GST and fulfilment fees.

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Net profit per unit · 3 Nov 2026 · 9 min read

Net Profit Per Unit: The FBA Formula for Safe Reorders

Net profit per unit shows what each FBA sale really leaves after fees, PPC, and returns. Get the formula, examples, and a breakeven ACOS method.

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Amazon fba profit margin calculator · 30 Oct 2026 · 9 min read

Amazon FBA Profit Margin Calculator: Net Profit Per Unit

An Amazon FBA profit margin calculator walkthrough: a worked wholesale SKU showing every fee line, so you know your true net profit per unit before reordering.

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Ppc campaign optimization · 30 Oct 2026 · 10 min read

PPC Campaign Optimization for Amazon FBA Profit

PPC campaign optimization tied to true profit: set breakeven ACOS per SKU, match targets to launch, growth, and maturity stages, and protect reorder cash.

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Amazon fba storage fees · 27 Oct 2026 · 10 min read

Amazon FBA Storage Fees: True Net Profit Per Unit

Amazon FBA storage fees explained: rate cards for US, UK, and India, Q4 peaks, aged surcharges, and worked examples showing per-unit profit impact.

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Profit · 27 Oct 2026 · 5 min read

How to work out your true Amazon FBA profit (UK)

Most sellers overstate their margins. Here's how to work out what you actually keep per unit — VAT, Amazon's fees, storage, returns and ads all included — and why the number moves every week.

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