National Research Program Audits: The Random Exam That Checks Everything

Most audits start with a reason. Your DIF score was high, a 1099 did not match, a business partner was under exam. The National Research Program audit starts with something different: a random sample.

That changes the conversation. You did not trip an alarm. You were picked so the IRS could measure how accurately people like you file. But because the IRS is using your return as a data point, it wants that data point to be precise. NRP exams can feel more detailed than the issue on your return would justify. They are designed that way.

What the National Research Program is

IRM 4.22.1 explains that the NRP collects data on reporting, payment and filing compliance so the IRS can make strategic decisions about where to put its resources. Reporting compliance, the IRM says, is the percent of true tax liability that is correctly reported on timely filed returns, and it represents the largest share of the tax gap.

The data from NRP exams goes into the Compliance Data Warehouse, where it is used to estimate the tax gap and build the Discriminant Function (DIF) formulas (IRM 4.22.1.1.4). Those DIF formulas are what score every individual return for audit potential. In other words, an NRP audit is how the IRS calibrates the system that picks everyone else's audits. If you want the selection side of the story, see how the IRS selects returns for audit.

The IRM is candid about why randomness matters. NRP returns are randomly selected and can represent thousands of similar taxpayers in the population. Even small adjustments can significantly affect compliance estimates (IRM 4.22.1.3).

Why you got a letter

NRP exams open by mail like every other audit. IRM 4.22.6.3 lists the initial contact letters developed for NRP individual returns:

• Letter 2205-B, used by revenue agents.
• Letter 3572-B, used by tax compliance officers.
• Letter 6316, used only when the NRP exam will be conducted by correspondence.

The letter is mailed with Publication 1, Notice 609 (the Privacy Act notice) and Notice 1332, which explains why your return is being examined. Field cases also get Publication 4134, the list of Low Income Taxpayer Clinics.

The IRM also says that, because NRP results matter so much to the IRS, "all possible efforts should be made" to contact NRP taxpayers. Ignoring an NRP letter is not going to make the IRS lose interest. It will do the opposite.

The good news: the IRS did homework first

Before anyone contacts you, the NRP builds a case file. IRM 4.22.1.3 describes using case building data, meaning internal IRS data and publicly available data associated with your return, to determine whether items can be accepted as filed without asking you about them.

The stated goal is to minimize taxpayer burden by relying on data the IRS already has instead of line-by-line audits, and to rule out compliance issues that can be determined to be correct before contacting you. So by the time the letter arrives, some of your return may already be cleared. The classified issues that remain are the ones the IRS could not verify on its own.

The bad news: every classified issue gets worked

In an ordinary exam, an examiner has room to drop issues that are not worth the time. The IRM even builds in a mid-audit decision point for that purpose. NRP is different. IRM 4.22.6.6 says: "Examination of all classified issues is mandatory."

There is more:

• Minimum income probes are required on all NRP cases. Expect questions and analysis designed to test whether all income was reported. See bank deposits and income probes.
• A T-account is completed as part of a financial status analysis. That is a comparison of money in and money out. If it suggests unreported income, the IRM says a formal indirect method should be considered.
• All adjustments go on the report, regardless of size. For NRP key cases, IRM 4.22.6.7 requires every adjustment to be included on Form 4549.

That last point cuts both ways, and this is the part most people miss. The IRM tells NRP examiners to capture all adjustments "no matter how small or whether the adjustments favor the IRS or the taxpayers" (IRM 4.22.1.3). Classifiers in general are told to look for overassessments as well as deficiencies. If you missed a deduction or credit you were entitled to, an NRP exam is the time to raise it.

Who examines NRP returns

Only examiners who complete NRP training work NRP cases, and the training must be repeated annually (IRM 4.22.6.1.4). The IRM recommends that cases with a Schedule C or Schedule F be assigned to revenue agents because of the need to tour the business (IRM 4.22.6.2).

Face-to-face exams are the primary objective. But Exhibit 4.22.6-1 sets criteria for working some NRP cases by correspondence, including no more than 10 issues on the return, no Schedule F, and Schedule C only in narrow cases (cash basis, no cost of goods sold, no depreciation, no home office, no net loss, no business tour needed). Any return with a financial status concern stays face to face.

Same standard of proof as any audit

NRP does not lower the bar, and it does not raise it. IRM 4.22.6.6 says NRP taxpayers are held to the same standard of proof required in a regular examination. That means the substantiation rules for travel, vehicles and gifts still apply (see section 274(d) substantiation), and so does the general duty to keep records (see IRC 6001 recordkeeping).

The IRM also requires that IDRs be tailored to the return and the issues and list the specific records the taxpayer should provide. If you get a generic, everything-under-the-sun request, it is fair to ask the examiner to narrow it. See Form 4564 document requests.

Other years

Does an NRP audit automatically pull in your prior and subsequent years? No. IRM 4.22.6.6 says prior, subsequent or related returns are not required to be picked up for NRP cases. The examiner decides whether to expand the scope, following standard exam procedures. So expansion is possible, but it is not automatic. Read audit scope expansion for how that decision is made.

Disagreeing with an NRP result

NRP exams close like other exams: no change, agreed or unagreed, with the same appeal routes. And if the case closes and you later find the proof you needed, IRM 4.22.6.5 says NRP cases are subject to the same audit reconsideration rules as any other exam. When a closed NRP case is accepted for reconsideration, it is no longer part of the NRP study. See audit reconsideration.

How to handle an NRP audit

1. Respond promptly. The IRS will try hard to reach you. Make that easy.
2. Expect breadth. Prepare for questions about income sources and how you paid your living expenses, not just the line items in the letter.
3. Organize by issue. Each classified issue gets its own folder and its own summary.
4. Look for your own adjustments. Missed deductions, unclaimed credits, basis you forgot to report. The NRP examiner is supposed to capture those too.
5. Consider representation. Thoroughness is the point of an NRP audit. Thoroughness on your side helps.

An NRP audit is not an accusation. It is a measurement. Give the IRS an accurate one, and you can walk away knowing the number they recorded is the right one.