AICPA Guiding Principles of Good Tax Policy: Equity to Neutrality

The AICPA’s guiding principles of good tax policy are ten benchmarks for judging whether a tax system is structurally sound: equity and fairness, certainty, convenience of payment, economy of collection, simplicity, neutrality, economic growth and efficiency, transparency and visibility, minimum tax gap, and appropriate government revenues. Published as a nonpartisan framework, the principles ask a structural question about any proposed change: does it make the system fairer, simpler, and more reliable, or does it move in the opposite direction?¹

Two people who disagree completely about the right tax rate can still agree that a tax should be transparent, predictable, and cheap to administer. That is the value of the list. It gives lawmakers, practitioners, and ordinary taxpayers a shared vocabulary for analyzing proposals without arguing first about who should pay more.

Equity and Fairness

Equity has two dimensions. Horizontal equity means taxpayers in similar circumstances should owe similar amounts; two single filers each earning $75,000 in wages should not face dramatically different bills because of arbitrary distinctions. Vertical equity means those who earn more should contribute more. The AICPA notes that fairness is best measured across the full range of taxes a person pays rather than any single tax in isolation.¹

That last point matters. A sales tax on its own may look regressive because lower-income households spend a larger share of earnings on taxable goods. Paired with a refundable credit for low earners, the combined picture may still satisfy vertical equity. Evaluating fairness requires looking at the whole system.

Certainty

You should be able to figure out what you owe without hiring a specialist or guessing. The rules need to specify when the tax is due, how to calculate it, and what records to keep. When statutes are vague or guidance is delayed, filers face a bind: the return is due, but the rules are not final. A system where two competent accountants reach different conclusions about the same transaction is failing this principle.

Convenience of Payment

Taxes collected at the wrong time create needless hardship. Payroll withholding is the clearest success story. The federal income tax runs on a pay-as-you-go basis, taking revenue as wages are earned rather than demanding a lump sum months later.² That design makes compliance nearly automatic for most wage earners and keeps revenue flowing steadily through the year.

The same logic drives estimated quarterly payments for the self-employed, point-of-sale collection for sales taxes, and payroll deposit schedules for employers. Collect the money when it is available and the transaction is fresh, not later when the funds may already be spent.

Economy of Collection

Every dollar spent collecting a tax is a dollar unavailable for public services or private use. Economy of collection asks whether the administrative machinery is proportionate to the revenue produced. Americans spend an estimated 7.1 billion hours per year on federal tax compliance, with total compliance costs running roughly $536 billion annually when out-of-pocket costs for software, preparers, and postage are added to the value of lost time. That is close to two percent of GDP.

A provision that raises $500 million while costing $400 million in combined government and taxpayer effort is a poor bargain by this standard. The principle pushes lawmakers to ask not only how much a tax will raise, but how much everyone will spend to administer it.

Simplicity

Simplicity is closely related to economy of collection but focuses on the taxpayer’s experience rather than dollar cost. A simple system lets people understand the consequences of transactions before they act, comply without professional help, and catch their own errors before filing. As the code grows dense with phaseouts, overlapping credits, and thresholds that shift each year, unintentional mistakes multiply. The IRS can impose a 20-percent accuracy-related penalty on the portion of an underpayment caused by negligence or a substantial understatement of income, plus interest that accrues until the balance is paid.³⁴

Neutrality

A tax system’s primary job is to raise revenue, not to reward or punish particular economic choices. Neutrality means the code should not be the deciding factor in whether a business invests in real estate instead of technology, or whether a worker takes a salaried position instead of freelancing. Every targeted incentive violates neutrality to some degree. That does not make all incentives bad, but the principle forces an honest question: is the policy goal important enough to justify tilting the playing field?

When the code heavily favors one type of transaction, capital flows toward the tax break rather than toward its most productive use. The misallocation is invisible on any single return but shows up over time as industries shaped more by tax preferences than by market demand.

Economic Growth and Efficiency

A tax system should not strangle the activity it depends on for revenue. If rates or rules reach a point where they discourage investment, hiring, or innovation, the economy contracts and revenue eventually falls with it. The AICPA frames this as alignment: the tax system should support, or at least not undermine, the jurisdiction’s broader economic goals.¹

This principle does not say taxes should be low. It says the system should avoid creating drag that outweighs the value of the services funded. A well-designed tax that finances infrastructure can promote growth even while imposing a cost; a poorly designed one that discourages the same investment can shrink the pie for everyone.

Transparency and Visibility

Taxpayers should know what taxes exist, how much they owe, and when the government is collecting. Hidden taxes violate this principle. Excise taxes embedded in the price of fuel can add significantly to what consumers pay at the pump, yet they never appear on the receipt. The employer share of payroll taxes is another layer that workers rarely see on a pay stub. When taxes are invisible, voters cannot accurately assess the cost of government, and debate about spending gets disconnected from who is paying.

Transparency also means the rules for computing a tax should be understandable enough that a taxpayer can verify the result. A tax you can see but cannot compute fails this principle almost as badly as one that is hidden.

Minimum Tax Gap

The tax gap is the difference between what taxpayers owe and what they actually pay on time. For tax year 2022, the IRS projected a gross tax gap of $696 billion and a net tax gap of $606 billion after enforcement and late payments.⁵ The voluntary compliance rate sat at about 85 percent, meaning roughly one in seven dollars owed went unpaid without IRS intervention.

This principle says the system should be designed to close that gap, with a caveat: enforcement has costs too. Auditing every return aggressively might shrink the gap but would violate economy of collection and taxpayer privacy. The goal is balance. Strong third-party reporting, clear filing instructions, and reasonable penalties all contribute to a smaller gap without turning the IRS into an overly intrusive presence.

Appropriate Government Revenues

A tax system that swings wildly from surplus to shortfall makes long-term budgeting impossible. Schools, infrastructure projects, and public safety programs need predictable funding, and predictability depends on a tax base that generates reasonably stable revenue year to year. This principle is less about the total amount collected than about reliability. A volatile structure forces governments into chronic under-investment or last-minute scrambles to cover shortfalls, neither of which serves the public well.

How the AICPA Uses the Framework

The principles are not academic. The AICPA’s Tax Policy and Advocacy team uses them as a scoring rubric when evaluating legislation on Capitol Hill and regulatory proposals at the IRS and Treasury.⁶ The organization files comment letters, testifies before Congress, and endorses or opposes specific bills based on how they score against the ten benchmarks rather than on political alignment.

Recent positions show the range. The AICPA has supported legislation to simplify beneficial ownership reporting under the Corporate Transparency Act, backed bills that would improve IRS electronic payment systems, and endorsed the Taxpayer Assistance and Service Act, a bipartisan package with 63 provisions aimed at reducing administrative burdens on filers and preparers.⁷ Each traces back to one or more of the ten principles, whether simplicity, convenience of payment, or economy of collection. The AICPA also maintains a list of endorsed federal tax legislation for each Congress, giving practitioners and the public a concrete record of which proposals the organization believes would improve the structural quality of the tax system.⁶

1
AICPA & CIMA. AICPA Guiding Principles of Good Tax Policy
2
Internal Revenue Service. Tax Withholding
3
Office of the Law Revision Counsel. 26 USC 6662 – Imposition of Accuracy-Related Penalty on Underpayments
4
Internal Revenue Service. Accuracy-Related Penalty
5
Internal Revenue Service. IRS – The Tax Gap
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AICPA & CIMA. Tax Advocacy
7
AICPA & CIMA. 2026 Tax Policy and Advocacy Comment Letters