Marosa Review
Marosa is a Wolters Kluwer-owned VAT compliance and e-invoicing provider that pairs its VATify software with in-house VAT specialists to register, file and report across Europe for multinational tax teams, e-commerce sellers and tax firms.
Independently scored, one dimension at a time. Every dimension is sourced, and we say whether a claim is published, reported, or estimated.
Marosa files in-house across the EU 27, the UK, Switzerland and Norway and uses local partners in APAC, Africa and Latin America (tax advisor FAQ, checked 9 October 2026). The API docs claim 63+ countries and tax regions and mark 19 countries live for e-invoicing or e-reporting, including Spain SII and VeriFactu, Italy SDI, Poland KSeF, Romania and France. The April 2026 release notes show rate and form updates for more than 10 countries, and the site carries 22 VAT manuals. Depth outside Europe is unproven.
The General Terms (version 1.01, effective 27 January 2026) commit to answering platform inquiries within 24 hours through email, phone and an online portal, and Amazon sellers get a named account manager. Marosa lists support in English, German, Spanish and Italian and sells a Premium Support Subscription with included tax advisory hours. Trustpilot shows 4.1 from 33 reviews on 9 October 2026 (reported), with praise for responsive agents and some 1-star reviews about billing after cancellation.
For managed compliance Marosa carries the heavy steps: one information request, powers of attorney, registration forms and tax office follow-up, with first contact promised within 7 business days on its Taxdoo transfer site. SaaS and e-invoicing customers own ERP extraction and set-up under the supplemental terms, with training scoped at about 2 hours per country. The API docs claim 3 to 5 weeks to full integration (vendor claim) and offer a sandbox.
VATify provides approval workflows and per-user task monitoring (platform specification), event logs (data processing agreement) and version history (VATify product page), all checked 11 October 2026, and managed returns are filed only after customer approval. Marosa is on the DGFiP list of registered French approved platforms (number issued 15 January 2026) and is AP and SMP certified on the OpenPeppol list. An ISO/IEC 27001 certificate from OCA, scoped to the VATify application with expiry 19 December 2027, is public through a reseller's site, but Marosa publishes no SOC 1 or SOC 2 statement. The General Terms exclude audit support and disclaim that the service meets the customer's compliance obligations.
VATify pulls Amazon data by API (and Zalando, per its tax advisor page), and Stripe's filing documentation lists Marosa as a no-code VAT filing partner. Other channels (eBay, Shopify, PlentyOne, Kaufland, JTL, Billbee) arrive through report importers, and ERP data comes by connector, REST API, or Excel and CSV templates. Marosa says SAP, Oracle and other third-party connectors are available but names no marketplace listing or certification, and its DATEV output is described as compatible, with no native DATEV export.
Marosa says its Vigo centre submits 40,000 returns a year, and the API accepts 1,000 documents per batch with asynchronous processing above that (developer docs, updated March 2026). Wolters Kluwer reported 112 FTEs and about 10 million euros of 2025 revenue, so service capacity is the first thing a large group should test. No API rate limits are published, and the availability commitment is 99.5 percent.
Marosa publishes 3 Stripe seller plans (350 to 1,500 euros a month on annual billing) and a per-country price list for Taxdoo transfers with 9 add-on fees (checked 9 October 2026). Enterprise SaaS, managed compliance and e-invoicing are quote only, and Vendr has no Marosa page. The public terms disclose the uplift rule (annual Spanish CPI), overage billing and repeat-filing fees, which lets a buyer model the bill before the first call.
Marosa describes 4 in-house AI tools (Cortex, VATify Advisor, Letters Agent, VAT Rate Engine) and says they run in its own operations, without availability dates or accuracy data. No MCP server is documented: the developer hub's index lists none, and the public MCP registry lists nothing for Marosa or VATify (checked 11 October 2026). The REST API is documented with OAuth, a sandbox and webhooks, but it covers e-invoicing only and needs credentials from Marosa.
A solid European VAT service with published prices for small sellers, no SOC report and no MCP server
Written by the Audit Friendly research team. No vendor edits, no sponsored placement.
The purchase is a VAT team with software attached. VATify handles data import, checks, return generation, approvals and e-invoicing, and Marosa's specialists will run any part of it: registrations, returns, fiscal representation, OSS and IOSS, VAT recovery. Marosa says its centre in Vigo submits 40,000 returns a year and files in-house across the EU 27, the UK, Switzerland and Norway. It has been a registered French approved platform since 15 January 2026 and is a certified Peppol access point. Wolters Kluwer bought the company on 4 August 2026 for 112 million euros of enterprise value, per its half-year report.
The catch is scale and proof. Wolters Kluwer put 2025 revenue at about 10 million euros and headcount at 112 FTEs, so this is a small provider inside a large parent, and the planned pairing with CCH SureTax is still ahead. An ISO/IEC 27001 certificate scoped to VATify is public on a reseller's site (issued by OCA on 19 December 2024, expiry 19 December 2027), but Marosa's own site shows only a badge and no SOC report is published. Outside Europe, Marosa relies on local partners. The public API covers e-invoicing documents only, credentials are issued on request, and there is no documented MCP server. Enterprise SaaS and e-invoicing pricing is by quote.
Before signing, get these into the order document: the term and the 90-day notice date, the annual CPI uplift and any cap on it, overage rates, the hourly rate for data transformation, and what a corrected filing costs. Ask for the current ISO 27001 certificate and statement of applicability, any SOC report, the hosting provider and data location, and a full data export before the end date, because the terms say customer data is deleted when the agreement ends. Ask what changes under Wolters Kluwer ownership and when.
- Groups with VAT registrations in several European countries that want one provider to prepare and file returns, EC sales lists and Intrastat.
- Amazon, Zalando or Stripe sellers that need OSS, IOSS and local VAT filings from a direct sales feed at a published monthly price.
- Tax teams facing French, Polish, Spanish or Italian e-invoicing mandates that want invoice data reconciled to the VAT return in one tool.
- US-centred sellers whose main problem is sales tax nexus and state filings; Marosa's content and filing team are built around European VAT.
- Buyers whose vendor risk process requires a SOC 1 or SOC 2 Type 2 report on file before contract.
- Teams that want an AI agent to run VAT returns end to end through an MCP server or a returns API today.
The jobs a tax team actually hires Marosa for
Jobs, mapped to how finance teams actually buy.
Hand European VAT returns to one team
Marosa prepares VAT returns, EC sales and purchase lists, Intrastat and SAF-T files, and submits them as a registered filer after the customer approves each draft. It says the same in-house team covers the EU 27, the UK, Switzerland and Norway. The customer still supplies clean data on the tax calendar and pays the VAT.
Send French e-invoices through a registered platform
Marosa appears on the French tax authority's list of approved platforms that passed interoperability tests. VATify produces Factur-X, UBL 2.1 and CII, validates against EN 16931 and the French CIUS, and reuses the invoice data for VAT returns and e-reporting. The France mandate started for large and mid-size issuers on 1 September 2026, per Marosa's timeline.
File seller VAT from the Stripe or Amazon feed
VATify connects to a Stripe or Amazon seller account, pulls transactions each month, runs validation checks and drafts VAT, OSS and IOSS returns for approval. Stripe's filing documentation lists Marosa as a no-code VAT filing partner for sellers in the EU. The entry plan includes 6 VAT registrations and 1,200 transactions a month.
Report Spanish SII and VeriFactu from one API
The API sends invoices to the Spanish tax agency for SII or VeriFactu, stores the required digital certificate and returns a reconciliation report against the agency's records. The same endpoint handles Italy SDI, Poland KSeF and Romania by changing the country parameter. Larger volumes run asynchronously.
Move off Taxdoo's discontinued VAT service
Taxdoo stopped offering VAT compliance and points customers to Marosa. The transfer package covers returns, Intrastat, OSS filings and power of attorney transfers with no base fee, and Marosa promises onboarding contact within 7 business days. Amazon data moves by API; other marketplace reports go through importers.
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What it actually costs
Here's what it really costs: published rates where a vendor lists them, aggregated quote data where they don't, plus a path to your own number.
6 VAT registrations, 1,200 transactions a month, tax expert support, Intrastat and informative filings, and a correspondence address.
10 VAT registrations and 4,000 transactions a month, with the same inclusions as the entry plan.
15 VAT registrations and 7,000 transactions a month, with the same inclusions as the entry plan.
Periodic and annual VAT returns, Polish SAF-T and Czech control statements, Intrastat and EC sales lists. No base package fee.
Same filings as the entry transfer plan.
Same filings as the entry transfer plan.
Priced per order document. The terms meter usage tiers, overages, hourly data work and repeat filings.
Listed on the Taxdoo transfer price list.
Listed on the Taxdoo transfer price list.
Listed on the Taxdoo transfer price list.
Listed on the Taxdoo transfer price list.
For periods before the engagement or corrections to filed returns.
What it actually takes to go live
The General Terms (version 1.01, effective 27 January 2026, checked 9 October 2026) renew a fixed-term agreement automatically for successive periods of the same duration. Either side must give at least 90 days notice before the renewal date to stop it. Open-ended agreements also need 90 days notice. Fees already paid are non-refundable, including annual subscription fees for services still to be delivered. Put the notice date in the calendar on signing day.
Section 7 of the General Terms lets Marosa adjust prices each year to reflect CPI published by Spain's National Institute of Statistics, unless the parties agree otherwise in writing. The same section says overage fees, upgrade fees and expired discounts do not count as increases. Usage above the tier in the order is invoiced at the order's overage rate or, if none is set, at Marosa's then-current standard rates (checked 9 October 2026). Ask for a cap and for overage rates in the order document.
Under section 7 of the General Terms, if incorrect or incomplete data forces Marosa to prepare a new filing, it charges an additional fee equal to the standard fee for that filing. Late data, data below Marosa's minimum requirements or a request to change the standard process is billed hourly in increments of 0.25 hours at the rate in the order (checked 9 October 2026). Expenses such as translations, couriers and apostilles are passed through at cost. Agree the hourly rate before signing.
The managed compliance terms (effective 27 January 2026, checked 9 October 2026) require the customer to review and approve each draft by the Filing Approval Deadline, at least two working days before the statutory due date. Without written approval or a standing written authorisation to file without review, Marosa does not submit and accepts no responsibility for the missed filing. The customer also stays liable for the correct tax treatment of its invoices and for paying the VAT. Decide up front whether to grant standing authority.
Section 8 of the General Terms says Marosa deletes the customer's account and all customer data on termination or expiry, unless statutory retention rules apply. The data processing agreement says users can export data in a machine-readable format, but no post-termination export period is stated, and section 4 makes the customer responsible for its own backups (checked 9 October 2026). The managed compliance terms also require the customer to keep all records for the statutory retention period. Export returns, receipts and e-invoices before the end date.
Marosa's about page lists ISO 27001 certification and its legal site footer shows an ISO 27001 badge, but neither links the certificate (checked 11 October 2026). A copy sits on the site of ICON, an Austrian advisory firm that resells VATify: the Spanish certification body OCA Instituto de Certificacion certified Marosa Group to UNE-EN ISO/IEC 27001:2023 on 19 December 2024, with expiry 19 December 2027, for the design, development, maintenance and management of the cloud VATify application at Marosa Ltd in Liverpool and Marosa VAT SL in Vigo. No SOC 1 or SOC 2 report is mentioned on Marosa's site or in its terms. The sub-processor list in the data processing agreement names only Marosa's own affiliates in 7 countries, so the hosting provider is undisclosed. Request the current certificate and statement of applicability, the hosting location and any Wolters Kluwer assurance reports that now cover VATify.
Scored on what an outside agent can actually reach: the documented API, how it authenticates, and whether the vendor ships an MCP server.
Exists: No first-party MCP server is documented. Marosa's developer hub (developers.marosavat.com, hosted on ReadMe) publishes an llms.txt index for AI agents and a Markdown version of every page, and that index lists guides and an e-invoicing API reference but no MCP server, tool list or setup instructions (checked 11 October 2026). The public MCP registry and GitHub show no Marosa or VATify server.
Scope: The surface an agent can use today is the VATify e-invoicing API, version 1.1. It creates and validates documents in JSON or UBL, sends batches of up to 1,000 documents, lists and downloads documents, converts invoices to PDF, requests a Spanish reconciliation report, stores SII and VeriFactu certificates and registers webhooks for status changes. Each call carries a purpose of e-invoicing, e-reporting or returns, so invoice data can be sent for periodic reporting. It has no documented endpoints for VAT return approval, filing status, registrations or payments.
Turnkey: No. Access starts with a request to the Marosa team, which issues separate OAuth 2.0 client credentials for sandbox and production. Tokens are short-lived and must be renewed from the expires_in value. No rate limits are published; the docs only warn that frequent token requests can exceed identity provider limits.
In-product AI: Marosa's AI page describes Cortex (plain-English questions over VAT data, translated into database queries), VATify Advisor (answers drawn from a closed knowledge base of internal manuals), Letters Agent (monitors inboxes, translates tax authority letters and drafts a summary for review) and VAT Rate Engine (proposes a VAT rate with links to the legal basis). The vendor says the tools are built in-house and tested in its daily operations. The page gives no availability dates, plan requirements or accuracy figures, so confirm which tools customers can use and which only Marosa's team uses.
Marosa, kept current
Marosa announced the deal, which Wolters Kluwer's 2026 Half-Year Report dates to 4 August 2026 at 112 million euros of enterprise value. Marosa says client contacts, the VATify roadmap and the Vigo centre stay in place.
Invoice-level drill-down on VAT returns, new cross-country NET and VAT analysis views, redesigned e-invoicing and real-time reporting screens, and 2026 return templates for several countries.
German review site OMR reported that Taxdoo offers a switching service with Marosa for registrations, pro forma invoices and OSS after ending its own VAT compliance. Marosa runs a transfer site with a published price list.
Marosa posted a 55-minute session introducing its in-house AI tools, with short demonstrations of each. The AI page names Cortex, VATify Advisor, Letters Agent and VAT Rate Engine.
The new terms apply on any renewal, upgrade or purchase from 27 January 2026. They set the 90-day notice rule, annual CPI price reviews, overage billing and a 99.5 percent availability commitment.
The French tax authority's list of approved e-invoicing platforms shows Marosa's registration number issued on 15 January 2026, ahead of the 1 September 2026 mandate start.
Marosa FAQ
It depends on the buyer's route in. Marosa publishes two price lists (checked 9 October 2026). Stripe sellers pay 350 euros a month on annual billing for up to 12 filings a year with 6 VAT registrations, 850 euros for up to 25 filings and 1,500 euros for up to 50. Monthly billing costs 400, 950 and 1,700 euros.
Former Taxdoo customers pay per country: 1,100 euros a year for 1 to 2 VAT numbers, 1,300 for 3 to 5 and 1,600 for 5 or more, covering periodic and annual returns, Intrastat and EC sales lists. On that list a company registered in 4 countries would pay about 5,200 euros a year before add-ons (Audit Friendly estimate from the published per-country price).
Enterprise VATify licences, managed compliance for larger groups and e-invoicing are quoted. Budget for add-ons such as 299 euros per VAT registration and 199 euros hourly for tax advisory, and for the annual CPI adjustment in the General Terms.
The General Terms (version 1.01, effective 27 January 2026) say fixed-term agreements renew automatically for the same period unless either side gives at least 90 days notice before the renewal date. Open-ended agreements also need 90 days notice. Fees paid are non-refundable, except a pro rata refund when the customer terminates for Marosa's material breach.
On termination Marosa deletes the account and all customer data unless a statutory retention duty applies. The data processing agreement says users can export data in a machine-readable format, and the terms make the customer responsible for its own backups and for keeping records for the statutory period. Export returns, filings, submission receipts and e-invoices before the end date, and get the export format written into the order.
Liability is capped at the fees paid or payable in the prior 12 months, the contract is governed by Spanish law, and disputes go to the courts of Vigo.
For managed VAT compliance, Marosa does most of it. The published journey is one information request, powers of attorney and registration forms prepared by Marosa, follow-up with tax authorities until VAT numbers arrive, then VATify set-up. On its Taxdoo transfer site Marosa promises first onboarding contact within 7 business days. After that, timing depends on how fast the customer returns signed documents and how fast each tax office responds; some countries need notarised or original documents.
For e-invoicing and SaaS use, the customer carries more. The supplemental terms make the customer responsible for configuring its ERP to send data in Marosa's format, with training scoped at about 2 hours per country. The API documentation claims 3 to 5 weeks to full integration (vendor claim) and offers a sandbox with separate credentials.
Partly, and only through the API. Marosa documents no MCP server. Its developer hub publishes an llms.txt index for AI agents, and its REST API lets an agent holding Marosa-issued credentials validate and submit e-invoices, send batches of up to 1,000 documents, check statuses, download PDFs and XML, and subscribe to status webhooks.
An agent cannot prepare, approve or file a VAT return through the API, manage registrations or read the filing calendar. Those run in the VATify interface or through Marosa's team. Marosa's own AI tools (Cortex, VATify Advisor, Letters Agent, VAT Rate Engine) sit inside its platform and operations; ask which ones customers can use.
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