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What moved & whyA month-over-month narrative: your biggest gainers and losers, the driver behind each move, and margin shifts decomposed — volume vs price vs cost.
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What to watchHidden issues (products that look stable while the underlying signals deteriorate), stockout signatures, and ad-spend money-losers.
● MarginStory — the monthly Amazon P&L report, done for you
You already own the dashboards. This is the analyst.
MarginStory is a written month-over-month P&L narrative for your Amazon business — what moved, why it moved, and what to watch — on your own private report site.
Sellerboard and Helium 10 give you forty columns of numbers. This gives you the three things that changed, explained in plain English, reconciled before you ever see them — and signed by a human.
01 · What you get
An analyst's read, not another dashboard.
Every month, your numbers get the treatment a finance team would give them — movement decomposed, anomalies flagged, ratios recomputed — and you get the conclusions, not the homework.
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Private & brandedYour own hosted report site behind Google login — every month archived, every version kept, nothing lands in an inbox attachment.
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Reconciled before publishedEvery report passes a reconciliation gate against your source data, and data-quality flags surface anything suspicious — missing costs, implausible margins — instead of hiding it.
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The analyst in your pocketChat with your own numbers from Claude — "why did margin drop in March?", "show me the trend on my hero SKU" — answered from your live report database.
02 · How it works
Onboard in days. No dev work on your side.
Step 01
Connect
You share a Sellerboard report link (or a simple cost sheet) — about an hour of your time, once. No code, no IT project.
Step 02
We reconcile
Your history is loaded and checked month by month against your own source of truth. Your first report is reviewed by a human before you ever see it.
Step 03
Every month, on time
Your report usually lands around the 5th business day, and follow-up questions are answered within a couple of business days.
Concierge onboarding — we set everything up with you, by hand.
03 · See it live
Read a real report right now.
MarginStory: Acme Outdoor Co. — May 2026 monthly report
This is the actual product running on demo data: the same engine, the same report site, the same analysis. Start with "What Matters Most" at the top, then look at the biggest movers — every change comes with its driver spelled out. What you're reading is what lands for your store every month.
04 · Pricing
Less than a bookkeeper. Sharper than a dashboard.
Founding sellerA small founding cohort
$399/month
- Founding rate locked for your first 12 months, then the standard $599.
- Everything in Standard — same report, same site, same service.
- You shape the product: honest feedback, a testimonial at day 30, two introductions.
Six-month commitment, then month to month. This price won’t be offered again.
Standard
$599/month
- The monthly written P&L report + your private report site.
- Report usually around the 5th business day; follow-ups answered within a couple of business days.
- Ask-your-P&L chat available as an add-on.
Compare: a fractional analyst runs $800–2,500/month.
05 · Who this is for
Built for sellers with real money in motion.
Good fit You're a fit if
- You're an established Amazon seller and the P&L actually moves month to month.
- You use Sellerboard (or can export your numbers) — connection takes an hour.
- You want conclusions and next moves, not another tool to learn.
Not a fit Probably not if
- You're brand new and don't have a year of history to analyze yet.
- You enjoy living in the spreadsheets yourself (respect).
- You want a cheap dashboard — those already exist and we'll happily point you to them.
See your own numbers this month.
Three founding seats at $399. A short email is enough — we'll take it from there.
Claim a founding seat →