Donald Trump’s national sales tax pitch is really two different ideas that often get lumped together. Trump himself has mostly talked about using tariffs on imports to replace federal income taxes, not a traditional sales tax on domestic purchases. A separate bill in Congress, the FairTax Act of 2025, would create an actual national retail sales tax of about 23 to 30 percent and abolish the IRS. Both concepts aim at the same goal — taxing what you spend instead of what you earn — but they work differently, and neither closes the roughly $2.6 trillion revenue gap easily.
What Trump Has Actually Proposed
Trump’s public comments have focused on tariffs rather than a domestic sales tax. He has told reporters that “over the next couple of years” the country could be “almost completely” cutting the income tax because “the money we’re taking in is so enormous,” and has floated scenarios in which Americans “won’t be paying income tax” at all.
In July 2025, Trump announced that the global baseline tariff would likely land “in the range of 15 to 20 percent,” up from the 10 percent baseline announced in April. Smaller nations may face lower rates. Tariffs function as a consumption tax on imported goods: the importer pays the duty, and the cost typically reaches you through higher retail prices.
The math is the problem. Individual income taxes alone generate roughly $2.6 trillion a year, about half of all federal revenue. Even aggressive projections put 2026 tariff revenue around $191 billion. That leaves more than $2.4 trillion unaccounted for. A domestic national sales tax is the mechanism most economists point to as the only plausible way to replace income tax revenue at that scale, which is why the FairTax Act — not the tariff pitch — is where the actual sales tax debate lives.
The FairTax Act: The Real Sales Tax Proposal
The FairTax Act of 2025 (H.R. 25) would replace all federal income taxes, payroll taxes, and estate taxes with a single national retail sales tax. The bill sets the rate at 23 percent on a tax-inclusive basis, which translates to about 30 percent on a tax-exclusive basis. If an item costs $100 before tax, you’d pay $130 at the register.1Congress.gov. H.R.25 – 119th Congress (2025-2026): FairTax Act of 2025
The two numbers describe the same amount of money. Supporters use 23 percent because that’s the tax as a share of the total price paid, the same way income tax rates are described. Critics use 30 percent because that’s the markup on the pre-tax price, which is how sales taxes are normally quoted at the store. Which framing you hear usually tells you which side is speaking.
Instead of the IRS, states would collect the federal sales tax, keeping 0.25 percent of collections to cover administrative costs. Businesses would also keep 0.25 percent of what they collect. If a state refused to participate, the U.S. Treasury would step in and administer the tax directly in that state.
What Rate Would Actually Replace Income Tax Revenue
Independent analyses have consistently found that the rate needed to replace all federal income and payroll tax revenue is higher than what proponents typically advertise. Under optimistic assumptions — a very broad tax base covering nearly all goods and services, with minimal evasion — estimates put the required tax-exclusive rate around 39 percent. Under more realistic assumptions that account for evasion patterns similar to the current income tax, the required rate climbs above 50 percent, potentially much higher.
Two variables drive that range: how broad the tax base is and how much evasion occurs. Exempting groceries, medical care, or housing (as many advocates propose to soften the burden on lower-income households) shrinks the base and pushes the rate higher on everything else. A federal sales tax above 30 percent also creates strong incentives for cash transactions and under-the-table deals that don’t exist at current state sales tax rates of 6 to 9 percent.
Stacking on Top of State and Local Sales Taxes
A federal sales tax wouldn’t replace state and local sales taxes. It would sit on top of them. Most states already charge between 6 and 9 percent in combined state and local sales taxes. Adding a federal rate of 23 to 30 percent would push the total tax on many purchases to somewhere between 30 and 40 percent. Some analyses have projected that if states also converted their income taxes into sales taxes to conform with the new federal system, combined rates could reach 45 percent.
That sticker shock is one of the biggest practical obstacles. Americans are used to state sales taxes in the single digits. A combined rate approaching 40 percent would be visible on every receipt and could shift consumer behavior toward online purchases, cross-border shopping, or the cash economy.
The Prebate and Who Actually Pays More
The FairTax Act tries to address the most common criticism of a national sales tax — that it hits lower-income households harder — through a monthly “prebate” payment to every registered household. The prebate equals the sales tax rate multiplied by the federal poverty level for your family size, divided into twelve monthly checks. The idea is to effectively untax spending up to the poverty line.2Congress.gov. Text – H.R.25 – 119th Congress (2025-2026): FairTax Act of 2025
For a family of four, the 2025 federal poverty guideline is roughly $32,000. At the 23 percent tax-inclusive rate, that family would receive about $7,360 a year, or roughly $613 a month, regardless of their actual income. Married couples get an additional adjustment to prevent a marriage penalty. The Social Security Administration would handle the payments as direct deposits, mailed checks, or loads onto smart cards.
Whether the prebate fully offsets the regressive impact is contested. Lower-income families spend a much larger share of their income on consumption — roughly three-quarters, compared with about one-sixth for upper-income families. A household earning $40,000 that spends most of it would pay a much larger share of income in sales tax than one earning $400,000 that saves and invests the majority. The prebate cushions the blow at the poverty level, but families just above that line would still face a heavier effective tax rate than wealthy households.
What Happens to Social Security and Medicare
Payroll taxes withheld from your paycheck for Social Security and Medicare currently supply about 23 percent of federal revenue. Eliminating them would mean bigger paychecks immediately, but it also breaks the historical link between what you pay in and what you’re entitled to receive. The current system tracks your earnings over your working life to calculate your benefit. A consumption-tax-funded model would need a different mechanism to determine benefits.
Under the FairTax Act, Social Security and Medicare would be funded from national sales tax collections rather than dedicated payroll contributions. Any transition period creates risk. If income and payroll taxes end before sales tax revenue fully ramps up, the trust funds face a gap during the switch. For the roughly 67 million Americans currently receiving Social Security benefits, even a temporary disruption would be alarming.
What It Would Mean for Your Paycheck and Your Purchases
The immediate effect of replacing income taxes with a sales tax would be a larger paycheck. No federal income tax withholding, no payroll tax deductions, no annual filing. For someone earning $60,000 a year who currently loses roughly 22 percent of gross pay to federal income and payroll taxes, that’s about $13,000 more in take-home pay before spending a dollar.
The tradeoff hits at the register. A 23 to 30 percent federal sales tax on top of state sales taxes means paying significantly more for groceries, clothing, cars, home repairs, medical services, and anything else in the tax base. Whether you come out ahead depends almost entirely on how much of your income you spend versus save. High earners who invest most of their income would pay far less in total tax. Lower- and middle-income families who spend most of what they make would likely pay more, even after the prebate.
The transition itself carries risk regardless of income level. Home values could shift as the mortgage interest deduction disappears. Retirement accounts built under the current system, where contributions went in tax-free but withdrawals are taxed, would face a raw deal: you already paid the implicit cost of deferral, and now your withdrawals would be hit with sales tax on top. Used goods, if exempted, could see a surge in demand. Existing contracts, pensions, and obligations were all built around income taxation, which makes the transition the most dangerous phase of any proposal, no matter how clean the final system looks on paper.
Legal and Legislative Hurdles
Congress has broad power to tax under Article I, Section 8 of the Constitution, which authorizes it to “lay and collect Taxes, Duties, Imposts and Excises” as long as those taxes are “uniform throughout the United States.”3Constitution Annotated. Constitution of the United States – Article 1 Section 8 A national sales tax would likely qualify as an indirect tax on transactions, meaning it would need to apply at the same rate in every state but would not need to be apportioned among states by population.
The harder legal question is whether repealing the 16th Amendment is necessary to prevent a future Congress from simply reimposing income taxes alongside the new sales tax. The FairTax Act includes language prohibiting federal income taxes, but a statute can be repealed by a later Congress. A companion resolution (H.J.Res. 14) has been introduced to formally repeal the 16th Amendment through the constitutional amendment process, which requires two-thirds approval in both chambers and ratification by 38 state legislatures.4Congress.gov. H.J.Res.14 – 119th Congress (2025-2026) That’s a dramatically higher bar than passing a tax bill.
Tax legislation itself starts in the House Ways and Means Committee, moves to the full House, then to the Senate Finance Committee and the full Senate.5Internal Revenue Service. Understanding Taxes – Activity 2: Formal Tax Legislation Process Budget reconciliation offers a shortcut past the 60-vote Senate filibuster, but under the Byrd Rule, provisions that don’t directly affect federal spending or revenue can be stripped, and provisions that increase the deficit beyond the budget window can be struck.6Congress.gov. The Budget Reconciliation Process: The Senate’s “Byrd Rule” Repealing the 16th Amendment cannot go through reconciliation at all. A constitutional amendment has succeeded only 27 times in American history, and each one took years.