Why the IRS Often Finds It Easier to Audit Ordinary Taxpayers Than the Ultrawealthy
The Internal Revenue Service faces a problem familiar to almost any organization with limited resources: The easiest work to complete is not necessarily the work with the biggest potential payoff.
A low-income taxpayer claiming a refundable credit may file a relatively simple return containing information that can be checked automatically against government records. A wealthy business owner may have partnerships, trusts, privately held companies, real estate, foreign interests and transactions involving tax rules complicated enough to require teams of experienced examiners, accountants and lawyers. The second return may contain far more potential tax revenue, but it can also require dramatically more time and expertise to audit.
That difference helps explain one of the most controversial features of federal tax enforcement. Low-income taxpayers have historically faced relatively high audit rates in part because the IRS can examine certain refundable-credit returns inexpensively through correspondence audits, while enforcement against sophisticated high-income taxpayers requires scarcer employees with specialized expertise. The agency spent years rebuilding some of that capacity after receiving additional money in 2022, only to face another major workforce contraction beginning in 2025. Entering 2026, the National Taxpayer Advocate reported that the IRS workforce had fallen about 27%, creating new uncertainty over how aggressively the agency can pursue the most complicated cases.
The IRS Lost Much of Its Enforcement Capacity Over the Previous Decade
IRS enforcement did not weaken because wealthy tax returns suddenly became simpler. The agency had fewer people available to examine them.
GAO found that individual audit rates declined across every income group between tax years 2010 and 2019, with IRS officials attributing much of the decline to lower staffing caused by reduced funding. The decrease was particularly pronounced among higher-income taxpayers, whose returns generally require more examiner time and specialized expertise.
That distinction matters because an audit is not a uniform unit of work. The IRS can send a letter asking a taxpayer to substantiate a relatively straightforward credit, and much of the process can occur without an examiner sitting across from the taxpayer. Auditing a wealthy individual whose income flows through partnerships and businesses can require tracing transactions across multiple entities, reviewing valuation questions and examining legal structures designed by sophisticated advisers.
Large partnerships demonstrate the problem especially clearly. GAO reported that the IRS audit rate for large partnerships had fallen below 0.5% after 2007 even as those organizations grew in number and complexity. GAO also found weaknesses in how the agency selected partnerships for examination, showing that simply increasing the number of audits is not enough if the IRS lacks the expertise and data to identify where noncompliance is most likely.
When enforcement resources become scarce, complexity itself can effectively become a defense. Not because wealthy taxpayers are exempt from the law, but because proving that a complicated transaction violates it can be much more expensive than checking a simple discrepancy.
Why Lower-Income Taxpayers Can Show Up So Often in Audit Statistics
The statement that the IRS “mainly audits poor people” requires more nuance. Higher-income taxpayers are also audited at above-average rates, and the most affluent can face substantially greater examination rates than middle-income workers. For tax year 2021, for example, the IRS reports an examination coverage rate of 6.6% for individuals reporting $10 million or more in total positive income, compared with 3.9% for those between $5 million and $10 million and 0.9% for those between $1 million and $5 million.
Low-income taxpayers nevertheless have historically appeared unusually often in audit statistics because of the Earned Income Tax Credit. GAO found that taxpayers reporting less than $25,000 and taxpayers earning $500,000 or more were audited at rates above the overall average in the years it examined. One reason is that IRS automated systems identify returns claiming refundable credits such as the EITC for correspondence examinations, which are cheaper and easier to conduct than complex field audits.
An EITC dispute can involve questions such as whether a child lived with the taxpayer for the required period or whether earned income was correctly reported. Those issues can still be burdensome for the person receiving the letter, particularly when documentation is difficult to produce, but they generally do not require the kind of forensic accounting that may accompany a network of privately held partnerships.
That creates an uncomfortable enforcement incentive. A tax agency trying to demonstrate audit activity with limited personnel can complete many relatively inexpensive correspondence examinations for the resources required to resolve a small number of extremely complex high-wealth cases. From an administrative perspective the choice can be understandable, while from a fairness perspective it can look backwards.
Wealthy Taxpayers Are Harder to Audit Because Their Income Is Harder to See
Wage earners live in a highly transparent tax system. Employers report wages to the IRS on Form W-2, financial institutions report interest and many investment transactions, and discrepancies can often be detected electronically.
Business and investment income can be much more complicated.
A wealthy taxpayer may receive income through partnerships, S corporations, rental properties, carried interests or privately held businesses. Determining the appropriate tax can require examining deductions, allocations among partners, asset valuations, depreciation and transactions between related entities. None of those arrangements is inherently abusive, and sophisticated tax planning is not the same thing as tax evasion. The enforcement challenge is identifying when legitimate complexity crosses into unlawful underreporting.
The distinction between avoidance and evasion matters. Taxpayers are allowed to organize their affairs to take advantage of deductions, exclusions and other provisions Congress placed in the tax code. Fraud begins when income is intentionally concealed, deductions are fabricated or other false information is used to evade tax legally owed.
Wealth can make both legal planning and illegal evasion harder to distinguish because wealthy taxpayers can afford specialists capable of designing and documenting complicated transactions. The IRS therefore needs comparably sophisticated personnel if it wants to challenge questionable positions successfully.
The Tax Gap Shows Why Enforcement Matters
The amount at stake is substantial.
The IRS defines the gross tax gap as the difference between the taxes legally owed and the amount voluntarily paid on time. Its latest projections for tax years 2017 through 2019 put the average annual gross gap at roughly $540 billion. Enforcement and late payments were expected to recover about $70 billion, leaving a projected net gap of approximately $470 billion annually.
The IRS’s newer projections for tax years 2021 and 2022 continue to show a voluntary compliance rate of about 85%, meaning the overwhelming majority of taxes are paid without enforcement while a meaningful share remains unpaid or underreported.
Closing even a modest portion of that gap can generate significant federal revenue without Congress increasing tax rates. GAO has repeatedly pointed to stronger tax enforcement as one potential way to reduce the gap, particularly because reduced IRS staffing contributed to falling audit rates during the previous decade.
The difficult question is where additional enforcement resources produce the highest return. Auditing taxpayers merely because their returns are easy to examine can increase the number of completed cases without necessarily addressing the largest sources of unpaid tax.
The Inflation Reduction Act Was Supposed to Change That Equation
Congress attempted to rebuild IRS capacity through the Inflation Reduction Act of 2022, which originally provided approximately $79 billion in additional funding over a decade for enforcement, taxpayer service, technology and other operations. The money was intended in part to rebuild expertise lost during years of staffing declines and increase scrutiny of high-income individuals, large partnerships and corporations. Subsequent legislation reduced portions of that funding, but the original investment represented a major shift after years of shrinking enforcement capacity.
The agency began announcing results from high-income enforcement initiatives. In September 2024, Treasury said IRS efforts focused on high-income and high-wealth taxpayers had recovered $1.3 billion, including $172 million from roughly 21,000 wealthy taxpayers who had failed to file returns since 2017.
Treasury had also directed the IRS to reach an audit rate of at least 8% for individuals reporting $10 million or more in income. GAO found that the agency was on track to meet that target for tax years 2018 through 2020, although it identified weaknesses in IRS research and audit-selection methods that could still reduce enforcement effectiveness.
Those programs demonstrated that additional resources could move enforcement toward more complicated taxpayers. They did not prove that every high-income audit would generate revenue or that wealth automatically indicates wrongdoing. The goal was to restore enough capacity that complexity would no longer make examining potentially significant noncompliance prohibitively difficult.
Then the IRS Workforce Shrunk Again
The enforcement environment changed dramatically in 2025.
According to the National Taxpayer Advocate, the IRS workforce fell from roughly 102,000 employees at the start of the 2025 filing season to fewer than 76,000 by June after accounting for employees who accepted departure programs. By the beginning of 2026, the Taxpayer Advocate described the agency as confronting a workforce reduction of approximately 27%, leadership turnover and the simultaneous challenge of implementing extensive new tax legislation.
GAO warned in March 2026 that the rapid workforce changes could worsen longstanding IRS difficulties in processing returns and providing taxpayer service. Enforcement faces the same basic labor problem: Complex audits cannot be automated simply by instructing a computer to examine more wealthy taxpayers. Experienced revenue agents, economists, attorneys and specialists need years of training to handle sophisticated cases.
This creates a recurring cycle in tax administration. Congress criticizes the IRS for failing to audit enough wealthy taxpayers, provides resources to rebuild the staff capable of conducting those audits, and then political pressure produces another round of funding or workforce reductions. The agency may then retreat toward enforcement activities that are easier to conduct with the people and systems still available.
The consequences are not limited to audits. Workforce reductions can also affect taxpayer assistance, appeals, processing and technology modernization, making the debate over IRS resources broader than a simple argument about whether the government should conduct more examinations.
There Is No 2017 Deadline Protecting Old Tax Fraud
One claim about IRS enforcement needs an especially important correction: Tax fraud committed before 2017 is not automatically beyond the agency’s reach because of a universal statute of limitations.
For an ordinary tax return, the IRS generally has three years from filing to assess additional tax. That period can extend to six years in certain circumstances involving substantial omissions of income. But when a taxpayer files a fraudulent return with the intent to evade tax—or fails to file a valid return at all—the IRS says there is no period of limitation for assessing the tax.
Collection operates under another rule. Once a tax has been assessed, the IRS generally has 10 years to collect it, although certain events can suspend or extend that period.
The reason recent high-income enforcement initiatives referenced nonfilers going back to 2017 was therefore not that earlier fraud had suddenly become legally untouchable. It reflected the scope and priorities of particular enforcement programs. The applicable statute depends on what happened on the return and whether fraud can actually be proven.
That distinction is important because alleging fraud carries a much higher burden than simply finding an error. A complicated return from a wealthy taxpayer may contain aggressive interpretations or mistakes without establishing intentional tax evasion.
Small Businesses and Gig Workers Present Their Own Enforcement Challenges
Self-employment income is another part of the tax system where compliance becomes harder because there is not always a third party reporting every dollar directly to the government.
A salaried worker’s wages are reported by an employer. A self-employed contractor may receive Forms 1099 for some payments while also handling cash transactions, business expenses and deductions that require more judgment. This does not make small-business owners or gig workers tax cheats, but it gives the IRS more areas where reported income can differ from actual taxable income.
That is one reason enforcement often focuses on areas where information reporting can be matched automatically. The easier it is for the IRS to compare a tax return with documents supplied by employers, banks or payment processors, the cheaper it becomes to identify potential discrepancies.
Sophisticated wealthy taxpayers can have the opposite profile. Their tax returns may contain enormous amounts of information but little that can be resolved through one automated document match. The agency may know that a transaction occurred without being able to determine its correct tax treatment without a lengthy examination.
The policy challenge is preventing enforcement from becoming disproportionately aggressive toward taxpayers whose financial lives are easiest to understand simply because they are easiest to audit.
Legal Loopholes Are a Congressional Problem, Not an IRS Enforcement Failure
Another important distinction involves tax strategies that people may dislike but that remain legal.
The IRS administers the tax code Congress writes. If lawmakers permit accelerated depreciation, preferential capital-gains rates, particular business deductions or complicated partnership structures, the IRS cannot declare those provisions unfair and collect additional tax simply because wealthy taxpayers benefit from them.
Tax avoidance uses legal rules to reduce tax liability. Tax evasion violates those rules.
The distinction often disappears in political arguments about billionaires and taxes, where legal strategies are described as though the IRS simply refuses to collect money that is obviously owed. In reality, changing many of those outcomes would require Congress to rewrite the tax code rather than the IRS to conduct a more aggressive audit.
Enforcement still matters where taxpayers hide income, fabricate expenses or abuse legal structures beyond what the law permits. But an enforcement agency cannot fix policy choices written into the statute.
That is one reason the tax gap should not be confused with the difference between what critics believe wealthy households should pay and what they legally owe.
Auditing Wealthy Taxpayers Can Produce Revenue, but It Is Expensive
It is tempting to assume that every wealthy taxpayer audit must be extraordinarily profitable because the taxpayer has so much money. That is not necessarily true.
A wealthy person may have a complicated return that is entirely compliant. GAO has noted weaknesses in IRS selection methods for large partnerships, finding that about 80% of the audits it examined did not identify tax noncompliance. That suggests the agency can spend significant resources on sophisticated examinations without necessarily producing additional revenue.
Better enforcement therefore requires better targeting, not simply more audits.
The IRS needs data systems capable of identifying unusual transactions, specialists who understand complicated entities and selection models that distinguish aggressive but lawful planning from genuine underreporting. Otherwise, the government can spend enormous amounts litigating difficult cases while compliant taxpayers absorb substantial legal costs defending legitimate positions.
A strong enforcement system should make evasion risky without making complexity itself suspicious.
The IRS Collected Trillions With a Relatively Small Enforcement Apparatus
The scale of the agency’s job is easy to underestimate. During fiscal year 2025, the IRS collected more than $5.3 trillion in gross taxes and processed 271.4 million returns and other forms. It closed approximately 497,600 tax-return audits, which produced $26.8 billion in recommended additional tax.
That means audits represent only a small portion of the compliance system. Most federal taxes are collected voluntarily because employers withhold wages, institutions report financial transactions and taxpayers file returns knowing that the IRS has some ability to verify them.
Enforcement therefore has a deterrence value beyond whatever an individual examination collects. If taxpayers believe complex income is unlikely ever to be examined, voluntary compliance can deteriorate even among people who are never audited.
The agency’s challenge is preserving that deterrence across an economy in which income can flow through increasingly complicated structures while maintaining service for millions of ordinary taxpayers who simply need help filing correctly.
Tax Enforcement Is Ultimately a Resource-Allocation Problem
The IRS does not face a simple choice between auditing poor people and auditing billionaires. It faces millions of possible compliance problems requiring vastly different amounts of time, technology and expertise.
Refundable-credit returns can often be checked inexpensively. Wage discrepancies can be identified through automated matching. A wealthy taxpayer with partnerships, privately held companies and complicated transactions may require a team of specialists to determine whether any additional tax is owed at all.
Years of funding and staffing reductions weakened that specialized capacity, and the Inflation Reduction Act began rebuilding part of it. The agency’s subsequent workforce contraction means that the question has returned with new urgency. The IRS can only pursue complicated enforcement at scale if it retains enough experienced employees to do the work.
That does not mean every additional dollar given to the IRS will automatically produce a larger return, nor does it justify intrusive enforcement against taxpayers merely because they are wealthy. Audit selection needs to become more accurate, taxpayer rights need to be protected and legal tax planning must remain distinct from fraud.
But a tax system in which simple returns receive scrutiny because they are cheap to examine while extraordinarily complicated returns become functionally harder to challenge creates its own form of inequality. Complexity should not become protection from enforcement simply because the government lacks the people capable of understanding it.
The debate over IRS funding is therefore not just about the size of a government agency. It determines what kind of tax system the country is capable of enforcing. When resources are scarce, the easiest taxpayer to audit can become the most attractive target. When expertise is available, the IRS has a better chance of focusing on the cases where the largest amounts of unpaid tax may actually be hiding.
