5 Common Tax Compliance Issues That Trigger Problems with the BIR
Staying compliant with tax regulations is essential for every business. Many audits, penalties, and enforcement actions arise not from fraud—but from overlooked compliance gaps. Below are five common issues that often place taxpayers on the radar of the Bureau of Internal Revenue (BIR).
1. Non-Filing of Tax Returns
Failure to file required tax returns on time remains one of the most common compliance violations.
This includes:
- Value-Added Tax (VAT) or Percentage Tax returns
- Income Tax Returns (ITR)
- Withholding Tax returns
Late or non-filing results in penalties, surcharges, and interest—and may lead to further investigation.
2. Discrepancies in Declared Sales, Purchases, and Other Transactions
Inconsistencies between filed returns and third-party data frequently trigger red flags.
Common mismatch sources include:
- Summary List of Sales and Purchases (SLSP)
- Summary Alphalist of Withholding Taxes (SAWT)
- BIR Form 2307 (Creditable Withholding Tax Certificates)
Even unintentional discrepancies can result in audit notices
3. Non-Responsiveness to BIR Notices and Letters
Ignoring official communications escalates minor issues into serious compliance problems.
These notices may include:
- Notice of Discrepancy (NOD)
- Preliminary Assessment Notice (PAN)
- Reminder letters and formal demands
Failure to respond within prescribed periods may result in final assessments and enforced collection.
4. Unresolved Open Cases (LOA / OCN / STOP-FILER Cases)
Unsettled or unattended cases remain active in the BIR system and can restrict future filings.
Examples include:
- Open Letters of Authority (LOA)
- Outstanding Case Notices (OCN)
- STOP-FILER tags
These must be formally resolved to restore full compliance status.
5. Underdeclaration of Income or Unsupported Claims of Expenses
Declaring unusually low income or claiming deductions without proper documentation is a major audit trigger.
Issues often arise from:
- Incomplete or missing supporting documents
- Expenses disproportionate to reported revenue
- Aggressive or unsubstantiated tax positions
Proper documentation and consistency are key to defensible tax filings.
Stay Audit-Ready
Proactive compliance, accurate reporting, and timely responses to BIR communications significantly reduce tax risk.
Need assistance reviewing your tax filings or resolving open cases? Professional guidance can help you stay compliant—and protected.
