What triggers a diesel refund audit in 2026?
SARS has signalled stronger compliance on the modernised diesel refund platform. Audits and verification are increasingly data-driven—matching user claims to seller records, registration profiles and operational evidence. Understanding common triggers helps you fix problems before SARS selects your file.
How SARS selects files for audit
SARS does not audit every claim, but selection is risk-based. On the standalone platform, SARS can cross-match users, sellers, transporters, registration data and claim patterns more systematically than under the VAT-era process. Files that show inconsistencies, outliers or incomplete profiles are more likely to be verified.
Trigger 1: Registration profile mismatches
Assets, storage facilities or activities on your electronic profile that do not match site reality are a red flag. Examples include:
- Equipment registered but scrapped or replaced on site
- Storage tanks omitted from the profile but used in practice
- Activities listed that do not align with actual operations
- Sellers on invoices who are not registered or not on your profile
Trigger 2: Seller and purchase data mismatches
Mandatory seller registration enables supply-chain traceability. Verification often starts when:
- Litres claimed exceed seller-reported volumes for a period
- Invoice or delivery note details do not match platform data
- Multiple users claim diesel from the same seller in patterns SARS flags as high-risk
Trigger 3: Reconciliation and volume anomalies
Sharp changes from historical claim volumes—especially after migrating from VAT—attract attention. So do:
- Claim periods where tank reconciliations do not tie out
- Usage logbooks that cannot support litres claimed
- Sites with high loss percentages or negative variances without explanation
Trigger 4: Weak or retrospective logbooks
Logbooks completed in batches at month-end, without meter readings, or without asset-level detail undermine credibility. SARS auditors often sample individual dispensing events—if those cannot be traced to source documents, the entire period is at risk.
Trigger 5: Sector and eligibility questions
Legislative updates affecting rebate percentages and eligible activities mean SARS may verify whether users still qualify under current Schedule 6 rules—particularly where activities span mining, agriculture, forestry, on-land or offshore operations.
Trigger 6: Prior disputes or refunds reversed
Businesses with history of disallowed refunds, prior audits, objections or adverse findings face higher ongoing scrutiny. New claims are read in that context.
What to do before you are selected
- Reconcile one recent month at your highest-volume site
- Test random logbook entries against invoices, dips and asset registers
- Update the electronic profile to match current operations
- Confirm seller registration and invoice alignment
- Run an internal evidence review—or commission an operational risk review
If you receive an audit or verification letter
Do not respond with narrative alone. Map SARS's questions to documents, build a structured response and identify evidence gaps before you submit. Meridian provides diesel refund audit support and SARS dispute advisory if matters escalate.
Related reading: seven evidence gaps that weaken your position, 2026 logbook requirements, and our free SARS objection evidence checklist.