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Executive Summary

Amazon sellers running brands with 50-500 SKUs struggle to know which products actually make money after accounting for FBA fees, PPC spend, refunds, and inventory carrying costs. They export CSV files from Seller Central, stitch together spreadsheets with QuickBooks data, and discover weeks later that a best-seller lost money all quarter because rising storage fees or click costs eroded margin. A finance hire costs $60k-80k annually, too much for sellers doing $500k-3M in revenue, yet manual reconciliation burns 10-15 hours per week and still misses the SKU-level detail needed to decide which products to reorder or pause. The MVP is a desktop app that imports Seller Central settlement reports and advertising CSVs, calculates true profit per SKU per week, and pushes summary journal entries to QuickBooks or Xero via API. Start with FBA sellers in the US market only, no Shopify or Walmart integration, and charge $99-149 per month for up to 200 SKUs. The local-first architecture means sensitive sales data never leaves the seller's machine unless they opt into cloud backup, which aligns with the Obsidian-style privacy trend and differentiates from cloud-only SaaS competitors that require uploading financial records. The market is attractive now because the $4.8B estimate assumes 2M active sellers globally spending $200/month on accounting and analytics combined, and even capturing 0.5% of that market yields $24M ARR. Fee inflation has turned profit tracking from a nice-to-have into a weekly survival ritual, and the maturity of QuickBooks and Xero APIs means you can ship a credible integration in 4-6 weeks instead of the six months it would have taken in 2020. Sellers already pay $50-150/month for inventory tools like RestockPro or PPC dashboards like Pacvue, so $99-149 for margin visibility fits established willingness to pay. The first validation move is to recruit 10 sellers from Amazon subreddits or Seller Central forums for $50 gift cards, walk them through a Figma prototype, and ask if they would pre-pay $500 for six months of early access. GTM starts with SEO content targeting long-tail queries like "calculate Amazon FBA profit per ASIN" and partnerships with bookkeepers who serve e-commerce clients and need a referral-fee tool recommendation. The biggest risk is that sellers below $1M revenue tolerate spreadsheet pain rather than pay $1,200 annually, while sellers above $2M already have a VA or contractor doing the work for $15/hour, leaving a narrow $1M-2M sweet spot that may only support a lifestyle business rather than venture scale.

Executive Summary

Why Now

Amazon third-party seller count exceeded 2 million active sellers in 2023, with most under $1M annual revenue. Rising FBA fees (10-15% fee increases 2022-2024) and competitive PPC costs force sellers to scrutinize per-SKU economics monthly rather than quarterly. QuickBooks and Xero APIs have matured, lowering integration friction. Local-first tooling (Figma, Obsidian) normalized offline-first UX expectations among prosumer users. Tax compliance pressure (U.S. Schedule C filers, VAT in EU) requires accurate COGS and inventory journals, pushing sellers from spreadsheets to purpose-built tools.

Pain Points

Amazon sellers cannot see per-SKU profit in real-time because Amazon reports only gross sales, fees, and refunds across all products; manually tracking COGS, FBA fees, PPC spend, and returns per SKU in spreadsheets takes 5-10 hours per month and is error-prone.

Sellers discover losing SKUs only after months of negative margin because Amazon Seller Central does not break out true landed cost, storage fees, and advertising attribution by individual product.

Accountants require monthly journal entries for COGS and inventory reconciliation, but exporting Amazon settlement reports and mapping them to QuickBooks or Xero line items is manual, repetitive, and prone to categorization mistakes.

MVP Preview

Amazon SP-API integration -- Connect via OAuth to pull order-level data (SKU, quantity, price, fees, FBA costs) every 4-24 hours, output a transaction feed that reconciles against Seller Central settlement reports, benefit is eliminating manual CSV uploads and ensuring data freshness for sellers managing 50-500 SKUs

SKU-level P&L calculator -- Ingest Amazon fees (referral, FBA, storage), COGS entered per SKU via CSV or manual input, marketing spend allocated by SKU or evenly, output net profit margin and ROI per SKU per month, benefit is showing which products subsidize losers so brands can cut underperformers within 30 days instead of bleeding cash for quarters

QuickBooks Online sync (one-way push) -- Map Amazon payouts and refunds to QBO income accounts, post aggregated daily/weekly transactions as journal entries, output reconciled books without duplicate entry, benefit is saving 4-8 hours/month for sellers doing manual reconciliation and reducing accounting errors that trigger tax penalties

Validation Questions

Amazon API access gate -- Amazon MWS and SP-API require seller authorization and throttle requests; new tools face 2-3 month onboarding friction and risk suspension if rate limits are breached, delaying product-market fit iteration.

Incumbent bundling pressure -- A2X, Seller Legend, and SellerBoard already integrate accounting sync; if they drop pricing to $20-30/mo or bundle SKU profit into existing dashboards, differentiation collapses to local-first UX alone.

Accountant adoption barrier -- If sellers' bookkeepers do not trust or understand local-first journal uploads, sellers revert to manual CSV exports, undermining the core workflow value and increasing churn after 2-3 months.

Amazon seller SKU-level profit tracking with accounting sync for small e-commerce brands

Executive Summary

Amazon seller SKU-level profit tracking with accounting sync for small e-commerce brands

Executive Summary

Executive Summary

Why Now

Pain Points

MVP Preview

Validation Questions

Market Validation

Market Opportunity

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