Being awarded an EU funding grant is a major achievement, but it is only the beginning. While project implementation is often the priority, the full challenge of Horizon Europe clearly appears when the European Commission announces a financial audit.

Under Article 25 of the Horizon Europe Grant Agreement, the EC can launch financial audits at any point during project, and up to two years after the final payment.

Initiated by an official “Letter of Announcement”, these reviews come with strict deadlines and the risk of severe financial recoveries. To safeguard your funding, preparation should start well in advance.

What Auditors Look For

When the official audit letter arrives, you’ll be asked to submit a significant amount of supporting documents. Even if the exact requirements can vary depending on which entity is performing the audit on behalf of the EC, the requests generally cover three main areas:

Detailed Cost Breakdown: normally an excel spreadsheet showing all reported project expenses following the official Grant Agreement cost categories is required. The focus is on perfect accounting reconciliation. It acts as the direct link between corporate accounting and EU compliance standards.

How to prepare:

• Check all numbers to prevent mistakes.
• Verify that every cost (staff, travel, equipment) matches your general ledger exactly.
• Ensure all claimed costs match the corporate bank statements.

Supporting documents of costs claimed: the auditors would need evidence to validate project costs reported. The goal is simple: full documentation for every expense. Every amount claimed must link directly to a verifiable activity, backed by physical or digital proof.

How to prepare:

• Centralize physical and digital records, ensuring all project-related documentation is accessible in one place.
• Gather personnel documentation, such as employment contracts and signed time-declarations for project staff.
• Save all financial documents, like payment proofs, invoices, and bank statements.

Internal governance and control: auditors will also assess the organization’s operational and financial governance to prove its administrative reliability. The requested information is used to check if the company’s internal policies are strong enough to prevent errors, double-funding, or conflicts of interest.

How to prepare:

• Collect official documents about the company’s legal structure.
• Prepare explanations on internal financial accounting and time-recording systems.
• Gather formal corporate policies (e.g., remote work and conflict-of-interest management)

Audit failure risks:

While these preparations are an essential starting point, a real Horizon Europe audit involves a much higher level of detail. The European Commission’s auditors go into specifics, from checking the exact exchange rates used for foreign currency transactions to physically verifying that EU-funded equipment carries the required EU label.

Failing to properly address these details can have significant consequences. Audits that go wrong can result in severe financial recoveries, where the EC may ask for the reimbursement of funds already released,and systemic corrections, where errors identified in a sample may lead to deduction applied to the entire project budget.

Need more details on the audit requirements and want to protect your project from funding losses? Get in touch with us at [email protected]