Received a BIR assessment notice? Here is what PAN, FAN, and your options actually mean
Got a BIR assessment notice and not sure what it means? Learn what a PAN and FAN are, what your options are at each stage, and what to do before a deadline passes.
What is a "deficiency tax"?
A deficiency tax is the difference between what the BIR believes you should have paid and what you actually paid. It can come from an audit that started with a Letter of Authority, a mismatch the BIR spotted in your returns, or a discrepancy uncovered during a cross-referencing exercise. The amount the BIR claims often includes the base tax, a surcharge, and interest that accumulates over time.
The BIR does not just send you a bill out of nowhere. Before it formally demands collection, it follows a sequence of official notices. Understanding what each one means gives you time and options you would not have if you ignored them.
The Preliminary Assessment Notice (PAN)
The PAN is the BIR's first formal statement that it believes you owe more tax. Think of it as a draft bill that comes with the BIR's explanation of why it arrived at that amount.
When you receive a PAN, you have a limited window to file a written reply explaining why you disagree. You can accept the findings and settle, or you can respond with your own evidence. The PAN stage is often the best time to resolve misunderstandings before the case escalates, because your response goes to the examiner before a final decision is made.
If you do not reply within the deadline, the BIR treats your silence as agreement and moves to the next step.
The Final Assessment Notice (FAN)
The FAN is the BIR's official demand for payment. It follows the PAN either because you did not reply, your reply was rejected, or the case went through a formal dispute process.
A FAN carries a specific amount due and a payment deadline. At this stage, you can still dispute the assessment by filing a formal protest with the BIR. You can also elevate the case to the Court of Tax Appeals if the BIR denies your protest. Both paths have strict deadlines counted from the date you receive the FAN, so the date on the notice matters a great deal.
Your realistic options at each stage
- Settle voluntarily. If the BIR's figures are correct or the difference is small, paying at the PAN or FAN stage typically stops interest from growing further.
- File a protest. If you believe the assessment is wrong, you can submit supporting documents such as official receipts, contracts, and books of accounts. A well-supported protest sometimes reduces or cancels the assessed amount entirely.
- Seek a compromise settlement. The official BIR rules provide a process that allows taxpayers to pay a reduced portion of the assessed tax and have the remainder waived under specific conditions. It is not available for all tax types or all circumstances, so verifying eligibility before applying is important.
- Appeal to the Court of Tax Appeals (CTA). If the BIR denies your protest, you can bring the case to the CTA within the prescribed deadline. This is a formal legal process that usually requires professional assistance.
What to do the moment you receive either notice
Open it right away and find the response deadline. A missed deadline at the PAN stage or the FAN stage can strip you of the right to dispute the amount or force a less favorable resolution.
Next, gather your supporting documents for the period covered by the assessment. Bank records, filed returns, Form 2307s, official receipts, and your books of accounts are the most common evidence requested.
If the assessed amount is significant, seek professional help early. The official BIR rules set firm deadlines that cannot be extended by goodwill alone, and the clock starts the moment the notice reaches you.
Still unsure what the notice says?
If you received a BIR assessment notice and are not sure what it means, type your question into AskOnward. The answers are grounded in the official BIR rules, and you can keep asking follow-up questions until the situation is clear enough for you to decide on a course of action.
This article is for general information and is not affiliated with the government. For official forms and the latest rules, see the Bureau of Internal Revenue at bir.gov.ph.