Receiving a 30-day letter from the IRS can be unsettling. This notice, usually accompanied by a Revenue Agent’s Report, explains proposed changes to your tax return and calculates the additional tax the IRS believes you owe. For example, the report might show an underpayment of $20,000 based on adjustments to income or deductions. The “30-day” part refers to the short deadline you have to decide how to respond. Here are the main options.
1. Agree and Pay
If you review the report and conclude the IRS is correct, you can agree with the changes, sign the waiver included with the letter, and pay the amount due (plus interest). This ends the matter quickly and avoids further administrative or judicial proceedings.
2. Pay and Preserve Your Rights
Even if you disagree, you may choose to pay the tax first and then file a formal claim for refund. If the IRS denies the claim or fails to act within six months, you can bring a refund suit in a U.S. District Court (with the possibility of a jury trial) or in the U.S. Court of Federal Claims (bench trial only). This route requires upfront payment but preserves the ability to litigate.
3. File a Protest and Go to Appeals
If you do not want to pay right away, you can file a written protest within 30 days. This sends your case to the IRS Independent Office of Appeals, which is separate from the audit function. Appeals officers have authority to settle cases based on the “hazards of litigation,” meaning they evaluate the strengths and weaknesses of both sides. Many taxpayers resolve disputes here without having to go to court.
4. Take No Action and Await a Notice of Deficiency
If you ignore the 30-day letter, the IRS will eventually issue a Notice of Deficiency — sometimes called a “90-day letter.” That notice gives you 90 days to file a petition in the U.S. Tax Court. The Tax Court is unique because it allows you to litigate before paying the disputed tax. However, if you miss the 90-day deadline, you lose that option and must pay first before challenging the assessment.
Making the Right Choice
Which path is best depends on the size of the proposed adjustment, the strength of your legal position, and whether you can or want to pay the disputed tax upfront. Acting within the deadlines is critical. Ignoring the letter will not make the issue disappear — it only moves the case further down the IRS enforcement pipeline.
