Cabinet Hayot Expertise in Paris: gross revenue reconstruction, net margin per channel, OSS/IOSS VAT, Shopify, Amazon FBA, TikTok Shop. Pennylane stack with n8n automations.
In e-commerce, the cash that lands in your bank account is not your real margin. Between Amazon commissions (8 to 17 % depending on category), Stripe fees (1.4 % + EUR0.25 in Europe), refunds, chargebacks, Pan-European FBA fees and 3PL logistics costs, up to 30 % of gross revenue can evaporate before reaching your EBITDA.
The job of Cabinet Hayot Expertise in Paris: rebuild gross revenue channel by channel, break down every line (commission, PSP, refund, transport, ads), and produce the real net margin that drives your decisions. Not mechanical bookkeeping — a usable financial reading.
Stripe aggregates gross revenue, PSP fees (~1.4 % + EUR0.25 in EEA), refunds, chargebacks and dispute fees into a single bi-weekly transfer. Without a three-way reconciliation order / PSP / bank, you cannot rebuild real net revenue, true PSP fees, or actual losses. Above 500 orders/month or 2 PSPs combined (Stripe + PayPal + Klarna + Alma), manual reconciliation becomes a major accounting risk.
A Settlement Report contains more than 30 transaction types: sales, refunds, category commissions, FBA fees (prep, ship, storage), Sponsored Products advertising fees, marketplace VAT withholding (article 14a directive 2006/112), penalties, adjustments. Each line requires the right account. An aggregated entry distorts your gross margin — and every business decision downstream.
Cabinet Hayot Expertise opens a dedicated 512x sub-account per PSP (512100 Stripe, 512110 PayPal, 512120 Klarna, 512130 Shopify Payments, 512140 Alma) and breaks down 627 sub-accounts for bank/PSP fees. This structuring is invisible in a generalist firm — it is central to our mission.
As soon as your B2C sales to other EU countries exceed EUR10,000/year (excluding France), you must switch to the OSS (One-Stop Shop) and charge VAT at the destination country rate. The threshold is cumulative across the EU — not per country. Without OSS registration, you are non-compliant in every country involved.
The IOSS (Import One-Stop Shop) covers B2C shipments imported from outside the EU under EUR150. Without IOSS, your EU customers pay VAT + customs clearance fees at delivery — massive cart abandonment. For a Shopify dropshipper, IOSS is essentially mandatory from month one.
Activating Amazon's Pan-European FBA program = authorising Amazon to store your products in 7 countries (DE, FR, IT, ES, PL, CZ + UK separately post-Brexit). Direct consequence: mandatory VAT registration in each storage country — even before selling a single item there. Cabinet Hayot Expertise drives setup with EU fiscal representative partners.
Since 2021, certain marketplaces (Amazon, Cdiscount, eBay) act as single VAT collectors for B2C EU sales by non-EU sellers or for some domestic sales. Your CA3 return must therefore separate "VAT collected by marketplace" from "VAT collected by you". A frequent error = double-declaration or omission.
Your Meta (Facebook/Instagram Ads) and Google (Google Ads, Google Cloud) invoices are issued from Ireland and subject to VAT reverse-charge. Frequently overlooked in e-commerce — fixable but visible during an audit.
See our OSS-IOSS e-commerce VAT guide 2026 for the full EU rate matrix and threshold scenarios.
Samuel Hayot is a Power User and certified Pennylane trainer. Cabinet Hayot Expertise does not just use the software — we structure a complete chain from raw ingestion to net margin.
Native Pennylane connectors deployed: Shopify, Amazon Seller Central, Stripe, PayPal, Qonto, Pennylane Banking, Pennylane Invoicing.
n8n + custom API automations: for each e-commerce model, we build custom workflows that ingest raw reports (Amazon Settlement Reports, Stripe BalanceTransactions, Shopify Orders), break down commissions / refunds / PSP fees, and write pre-staged journal entries into Pennylane. Result: zero double entry, even above 10,000 orders/month.
For extreme marketplace volumes (>5,000 orders/month), we add A2X, Synder or Link My Books as needed.
See our Pennylane tool page for integration details.
The monthly table we deliver for each e-commerce client:
| Channel | Gross revenue | Commissions | PSP | Refunds | 3PL | Attributed ads | COGS | Contribution | Net margin |
|---|---|---|---|---|---|---|---|---|---|
| Shopify DTC | 100 % | — | -2 % | -4 % | -8 % | -18 % | -38 % | 30 % | 22 % |
| Amazon FBA EU | 100 % | -15 % | — | -3 % | FBA incl. | -8 % (TACoS) | -38 % | 36 % | 28 % |
| TikTok Shop | 100 % | -8 % | — | -7 % | -8 % | -12 % | -38 % | 27 % | 18 % |
| Cdiscount | 100 % | -12 % | — | -3 % | -8 % | -5 % | -38 % | 34 % | 26 % |
This channel-by-channel reading often reveals that a high-revenue channel actually destroys margin. The business decision then becomes obvious: cut, optimise, or reallocate.
We track CAC, LTV, ROAS, MER (Marketing Efficiency Ratio), CAC Payback, Repeat Rate, AOV.
Amazon charges Long-Term Storage Fees (LTSF) on items stored over 365 days in FBA. Without depreciation and cut-off alerts, you pay twice: recurring storage + write-off of unsellable goods. Cabinet Hayot Expertise integrates FBA depreciation into the annual close and flags at-risk SKUs monthly.
CCC = DSO + DIO − DPO. In e-commerce:
Without CCC steering, a fast-growing store starves on cash despite positive accounting profitability. Monthly CCC calculation is part of the standard Cabinet Hayot Expertise reporting.
Calendar of the e-invoicing reform (2026-2027):
For B2C e-commerce, the specifics are e-reporting: mandatory transmission to tax authorities of B2C transactions not covered by classic e-invoicing. That is exactly your Shopify / Amazon / TikTok Shop flow.
Strategic choice: PDP (Partner Dematerialisation Platform), OD (Dematerialisation Operator) or PPF (Public Invoicing Portal). Cabinet Hayot Expertise sets up Pennylane as PDP and configures automatic B2C e-reporting from your e-commerce channels.
To watch in parallel: reliable audit trail, 10-year retention of e-invoices, NF525 compliance for physical POS (if BAB retail).
French e-commerce shifts in 2026 from Search (intent: user searches a product on Google or Amazon) to Discovery (algorithm pushes the product to the user scrolling TikTok, YouTube or Instagram). Three platforms structure this new market:
Discovery E-commerce accounting specifics: platform commissions (~5% incl. tax TikTok Shop, ~5% YouTube Shopping), creator / affiliate payouts (social status to clarify — self-employed, BNC, employee), VAT collected by platform on certain deemed supplier transactions (article 14a directive 2006/112), massive micro-transaction flows during LIVE Shopping (1,000-5,000 orders in 1-3 hours), high return rate (15-25%).
Cabinet Hayot Expertise deploys a custom n8n workflow to ingest TikTok Shop API, YouTube Analytics and Instagram exports into Pennylane (no native TikTok Shop connector in 2026), and structures per-LIVE-Shopping-session reporting. Going further: our 2026 Discovery E-commerce guide.
Adopted by the EU Council in March 2025, the VIDA Directive (VAT in the Digital Age) is the largest European VAT reform since 1993. Gradual 2026-2030 application on three pillars:
Cabinet Hayot Expertise action: anticipated stack audit (Shopify, Pennylane, EU fiscal representatives), EU flow mapping, Pennylane PDP setup, B2B e-invoice issuance tests in sandbox from 2026. Going further: our complete VIDA Directive 2026 breakdown and our 2026 E-commerce Compliance pillar guide.
| Profile | Typical stack | Accounting priority |
|---|---|---|
| Shopify / Shopify Plus DTC | Stripe, Klaviyo, outsourced 3PL | Three-way reconciliation, contribution margin per product |
| Amazon FBA / Pan-European FBA | Seller Central, Helium 10, A2X | Settlement Report breakdown, EU VAT representative |
| TikTok Shop / influence | TikTok Shop API, affiliate creators | Creator payouts, platform-collected VAT |
| DNVB scale-up | Shopify Plus, Klaviyo, Triple Whale | Investor reporting, contribution margin per cohort |
| Multi-marketplaces | Cdiscount, eBay, ManoMano, Amazon | VAT matrix and consolidated gross revenue |
| Dropshipping / Print-on-demand | AliExpress, Printful, Shopify | IOSS, customs duties, refunds, real margin |
Dive deeper: Marketplaces (Amazon FBA, TikTok Shop), Dropshipping, DNVB & E-commerce Startups.
| Pack | Scope | Monthly fees (excl. VAT) |
|---|---|---|
| Essential e-commerce | 1 channel (Shopify or WooCommerce), 1 PSP, France VAT, annual close | From EUR550 |
| Multi-channel growth | Shopify + Amazon + 1 marketplace, OSS, monthly reporting | From EUR850 |
| International scale / FBA EU | Pan-European FBA, OSS/IOSS, international dropshipping, weekly reporting | From EUR1,400 |
Indicative pricing. Personalised quote within 24h after a free scoping audit.
Beauty DNVB, founded 2023, team of 5 in Paris, EUR1.8M revenue (Shopify 60 % + Amazon FBA 25 % + TikTok Shop 15 %). Before Cabinet Hayot Expertise: Shopify gross margin shown at 62 %, consolidated net margin never computed, OSS missed for 2 quarters.
After 90-day scoping: n8n automation of the 3 channels into Pennylane, structured 512x gateway accounts (Stripe / Amazon / Shop Pay), retroactive OSS regularisation, real net margin revealed at 18 % (not 35 % gross).
Business decision: shut down TikTok Shop channel (CAC > LTV at 6 months), reallocate budget to Shopify ads, renegotiate 90-day supplier DPO. Outcome 6 months later: +12 points of net margin, extended runway, Series A prepared.
Anonymised example representative of Cabinet Hayot Expertise engagements.
Cabinet Hayot Expertise in Paris also covers: Company formation in France, Pennylane — our certified accounting stack, OSS-IOSS e-commerce VAT guide 2026, Outsourced CFO for DNVB / startup.
Looking for an e-commerce accountant in Paris who does more than re-key your bank statements? Cabinet Hayot Expertise structures your accounting and tax stack so every business decision rests on real numbers. Free 90-day scoping.
France's e-commerce ecosystem reached EUR160 billion in 2025 (+11 % YoY, source Fevad), driven by the rise of DNVBs, marketplace expansion and the arrival of TikTok Shop. 80 % of French merchants use at least 3 cumulative sales channels (DTC + marketplace + social commerce). The accounting, tax and operational complexity of multi-channel e-commerce demands a specialist firm — not a generalist. Cabinet Hayot Expertise in Paris structures your accounting to turn Shopify, Amazon and Stripe flows into actionable net margin.
Full mapping of Shopify, Amazon Seller Central, Stripe, PayPal, Qonto. Native Pennylane connection plus custom n8n workflows for channels without an official connector (TikTok Shop, Cdiscount, ManoMano). Goal: a single source of truth in 15 days.
Dedicated 512x account per PSP (Stripe, PayPal, Klarna, Alma, Shopify Payments). Sub-accounts in 627 series (PSP commission, Amazon FBA fees, sponsored ads). Bank reconciliation becomes instant and reliable.
Threshold audit (EUR10k OSS, EUR150 IOSS), Pan-European FBA registration review, fiscal representative selection for DE/IT/ES/PL/CZ, marketplace VAT-withholding identification. CA3 prepared with exact splits.
Contributive table per channel (Shopify, Amazon, TikTok Shop, Cdiscount) with attributed ads, real COGS, 3PL transport, refunds, chargebacks. Identify channels destroying margin despite apparent volume.
Track marketplace DSO (Amazon D+14, Shopify D+1-7), inventory DIO (FBA, 3PL), supplier DPO. Anticipate cash crunches 90 days ahead. Essential for any fast-growing store.
Wherever you are in France, we deploy a 100% digital interface to deliver fast, highly-structured accounting and financial steering.
Samuel Hayot is a French chartered accountant and statutory auditor registered with the Paris professional bodies.
The firm is based in Paris 8 and operates with a delivery model designed for businesses located across France.
Pennylane, Dext, Silae and an automation-first setup built for visibility and speed.
Visible phone number, simple contact path, fast engagement letter and tighter qualification of the mandate.
30 complimentary minutes with Samuel Hayot to challenge your reporting and surface your priority levers.
Shopify vs WooCommerce 2026 comparison by Cabinet Hayot Expertise in Paris: real costs, OSS VAT, Pennylane connectors, B2C e-reporting, scalability. Our 5-criteria decision grid.
VIDA Directive 2026 explained by Cabinet Hayot Expertise in Paris: cross-border e-invoicing, real-time e-reporting, Single VAT Registration, deemed supplier marketplaces. 2026-2030 timeline.
2026 Discovery E-commerce by Cabinet Hayot Expertise in Paris: TikTok Shop FR 25M users, YouTube Shopping, Instagram Shop. Tax, accounting, affiliates, LIVE Shopping.
Cabinet Hayot Expertise in Paris compares Stripe, PayPal, Mollie, Klarna 2026: real fees, savings per profile, 512x method. How many EUR/year recoverable on EUR1M revenue?
Cabinet Hayot Expertise uses a 627 account (banking and similar services) with a dedicated Amazon sub-account, broken down by category commission rate (8 % books, 15 % most categories, 17 % jewellery). Amazon Settlement Report extraction is automated via n8n and journal entries are pre-staged in Pennylane without manual intervention, even above 5,000 orders/month.
As soon as Amazon stores your products in a foreign warehouse (DE, IT, ES, PL, CZ), you must register for VAT in that country — even before selling a single item there. Legal deadline: before the first stock placement. Cabinet Hayot Expertise drives registration via EU fiscal representative partners and integrates filings into the monthly calendar.
The native Pennylane connector pulls Stripe BalanceTransactions in near real-time. Cabinet Hayot Expertise structures the dedicated 512100 Stripe account and automates the breakdown of revenue / PSP commissions / refunds / chargebacks via custom n8n rules. Bank reconciliation becomes instant, gross revenue rebuildable in one click.
Cumulative across the EU (article 259 D CGI). Once EUR10,000 of consolidated B2C EU sales (all EU destinations excluding France) is reached, you must switch to OSS and charge VAT at the destination country rate. Threshold is annual, on the calendar year. Cabinet Hayot Expertise calibrates your Shopify / Pennylane setup to apply the right rates automatically.
SAS holding + operating subsidiary in 80 % of DNVB cases supported by Cabinet Hayot Expertise. Enables: Series A fundraising, BSPCE for the team, clean investor reporting, future exit optimisation via apport-cession 150-0 B ter. Structural audit included in the first engagement.
Cabinet Hayot Expertise offers 3 indicative tiers: from EUR550/month (mono-channel Shopify France, France VAT), from EUR850/month (multi-channel with OSS and monthly reporting), from EUR1,400/month (Pan-European FBA, international dropshipping, weekly reporting). Personalised quote within 24h after a free scoping audit.
Without a dedicated 512x account per PSP (Stripe, PayPal, Klarna, Shopify Payments, Alma), your bank reconciliation is wrong: the received transfer aggregates gross revenue, commissions, refunds and chargebacks. Cabinet Hayot Expertise structures 512100 Stripe, 512110 PayPal, 512120 Klarna, etc. Combined with 627 sub-accounts (PSP fees per type), this breakdown makes reconciliation instant and margin reliable.
Yes. Meta (Facebook / Instagram Ads), Google (Google Ads, Google Cloud) and TikTok (TikTok Ads) invoices are issued from Ireland and subject to VAT reverse-charge in France. Cabinet Hayot Expertise configures the CA3 to apply automatic reverse-charge and provides documentary evidence for audits. Frequent oversight = tax adjustment + late interest at 0.20 %/month.
Calendar: mandatory e-invoice reception on 01/09/2026, SME/TPE issuance on 01/09/2027. For B2C e-commerce, the specifics are e-reporting of transactions (Shopify, Amazon, TikTok Shop, Stripe). Cabinet Hayot Expertise configures Pennylane as PDP (Partner Dematerialisation Platform), sets up the reliable audit trail and 10-year retention, and automates e-reporting from your channels.
Yes for the France/EU accounting and tax scope. For Amazon US (Sales Tax, Nexus), Amazon UK (VAT post-Brexit), Cabinet Hayot Expertise relies on trusted local partners (US CPA, UK chartered accountant) and coordinates everything from Paris with a single point of contact. France remains your primary accounting hub.
Chartered Accountant, registered with the Institute of Chartered Accountants.
Regulated French accounting and audit firm based in Paris 8, built to support companies across France with a digital and decision-oriented approach.
Official and operational sources cited for this page.