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Case study
Fortune-500 EU manufacturer recovers €4.2M in missed input VAT and clears an active BAV audit in three days.
Customer chose to remain anonymous
Industry
Discrete manufacturing
HQ / footprint
European Union (multi-entity)
Annual revenue
$4.2B FY25
ERP
SAP S/4HANA (12 company codes · 27 plants)
Input VAT recovered
€4.2M
in the first fiscal quarter alone
Determination accuracy
98.7%
against baseline of 91.4% pre-Aurevat
Audit response time
3 days
down from 6 weeks (BAV Bavarian audit)
The challenge
- Twelve SAP S/4HANA company codes running across nine EU jurisdictions with divergent VAT setups.
- A rolling 18-month backlog of ~230,000 transactions with mis-classified reverse-charge treatment (Article 199 vs Article 196).
- An active Bavarian tax authority (BAV) audit demanding evidence for 6,400 disputed OSS positions within 30 days.
- Manual reconciliation had already consumed 2,800 person-hours across the tax and finance teams — with the deadline still slipping.
The solution
- Read-only SAP connector deployed on day zero. First full transaction stream completed in 22 hours.
- Claude Sonnet 4.5 applied EU VAT Directive 2006/112/EC rulesets to every transaction with citation-grade evidence per determination.
- WORM audit-log export bundled with HMAC-signed manifests, delivered directly to the BAV auditor for off-platform verification.
- Bulk simulator run against the 230K back-catalogue produced a per-country recovery position within 48 hours.
The outcome
- €4.2M input VAT recovered in the first fiscal quarter — of which €2.9M was previously untracked reverse-charge on intra-EU acquisitions.
- Audit closed in three days. Zero penalty assessed by the BAV.
- Determination accuracy lifted from 91.4% to 98.7%, verified against 5,000 random independent samples.
- Tax-team productivity 3.8x higher; two senior analysts redeployed to strategic tax-planning work.
“Aurevat was the first platform we tested that spoke SAP fluently. The recovery position it surfaced on day two — €4.2M — was more than our full-year audit budget. The BAV response is what convinced our board.”
Global Head of Indirect Tax·Fortune-500 European industrial group
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