United States vs Ireland taxes (2026): USC, PRSI and 12.5% trading tax

United States vs Ireland tax rates at a glance

Tax	🇺🇸 United States	🇮🇪 Ireland
Income tax	Personal income tax: 10% - 37% Social Security: 6.2% Medicare: 1.45% Additional Medicare: 0.9% State income tax: Varies	Standard rate: 20% Higher rate: 40% Single standard-rate cut-off: About EUR 44,000 USC bands: 0.5% / 2% / 3% / 8% Employee PRSI: 4.2% then 4.35% Employer PRSI: About 9% / 11.25%+
Corporate tax	C corporation tax: 21% CAMT: 15% Pass-through entities: Different State tax: Varies	Trading profits: 12.5% Passive / non-trading: 25% Company capital gains: 33% Pillar Two minimum: 15% Knowledge Development Box: Effective 10%
Capital gains tax	Long-term capital gains: 0% - 20% Short-term capital gains: 10% - 37% Qualified dividends: 0% - 20% NIIT: 3.8%	Standard CGT: 33% Annual individual exemption: EUR 1,270 Certain funds / policies: 40% Corporate gains: Often 33%
Dividend tax	Qualified dividends: 0% - 20% Ordinary dividends: 10% - 37% NIIT: 3.8% State tax: Varies	Dividend withholding tax: 25% Standard income tax on dividends: 20% / 40% USC on dividends: Often applies Non-resident relief: Treaty / exemption dependent
Wealth tax	Net wealth tax: 0% Property tax: Varies Estate tax: Up to 40% Gift tax: Up to 40%	Net wealth tax: 0% Annual asset tax: 0% Local property tax: Applies
Inheritance / estate tax	Federal inheritance tax: 0% Federal estate tax: Up to 40% Federal gift tax: Up to 40% Basic exclusion: $15,000,000	CAT rate: 33% Group A: EUR 400,000 free then 33% Group B: EUR 40,000 free then 33% Group C: EUR 20,000 free then 33% Spouse / civil partner: Generally exempt
VAT / GST / sales tax	Sales tax: Varies by state	VAT: 23%
Personal extras	State income tax and payroll tax vary	USC 0.5% to 8% (11% in some cases) plus PRSI
Company rate condition	21% federal C corp plus possible state tax	12.5% on trading profits; 25% on most passive income

Who wins on each tax

Personal income taxUnited States

The U.S. federal top ordinary rate is 37% before state tax; Ireland's 20% / 40% income tax plus USC and PRSI is usually heavier for high earners.

Corporate taxIreland

Ireland's 12.5% trading rate (25% passive) is below the 21% U.S. federal C-corporation rate, but only with real trading profits and substance.

Capital gains taxUnited States

U.S. long-term federal rates are 0% to 20%; Ireland's standard CGT rate is 33%.

Inheritance / CATTie

Ireland's Capital Acquisitions Tax is 33% after class thresholds; the U.S. federal estate tax can reach 40% after a large exemption.

VAT / sales taxUnited States

The U.S. has no federal VAT; Ireland's standard VAT is 23%.

The verdict

Ireland is not a low personal-tax country. Income tax is 20% and 40%, USC runs from 0.5% to 8% (and 11% on some self-assessed income over EUR 100,000), and employee PRSI is 4.2% for most of 2026 and 4.35% from 1 October 2026. The U.S. federal ordinary top rate is 37% before state tax, so high earners often prefer the United States on salary.

The 12.5% Irish corporation-tax rate applies to trading profits of a company with real Irish activity. Passive and many non-trading items are 25%, and large in-scope groups face a 15% Pillar Two minimum. A brass-plate Irish company does not deliver 12.5% for a U.S. founder who still lives, manages and banks in the United States.

Choose Ireland for an EU trading company, treaty network and genuine Dublin substance. Choose the United States for personal investment rates and U.S. market access. U.S. citizenship-based worldwide tax continues after Irish residence.

How to read this comparison

Ireland's brand is a 12.5% company. Ireland's household bill is income tax, USC and PRSI. Those are different products, and mixing them up is how U.S. founders overrate a Dublin move.

Personal tax uses two income-tax rates: 20% up to the standard-rate cut-off and 40% above it. For 2026 the common single-person standard-rate band is about EUR 44,000. USC is charged on gross income in bands from 0.5% to 8%, with an 11% band for certain self-assessed income over EUR 100,000. Employee PRSI is generally 4.2% for most of 2026 and 4.35% from 1 October 2026. That stack is why a 40% Irish higher rate is not comparable to 37% U.S. federal ordinary tax on a like-for-like basis. Add a U.S. state and the personal race becomes factual; it does not become an Irish win by default.

Capital gains tax and Capital Acquisitions Tax both sit at 33% in the common cases. U.S. long-term federal gains of 0% to 20% are usually gentler, though short-term U.S. gains are ordinary income and the federal estate tax can reach 40%. Ireland has no general net wealth tax. Standard VAT is 23%.

The company side is Ireland's real offer, and it is conditional. Trading profits of an Irish-resident company are generally taxed at 12.5%. Many passive items are 25%. Groups at the EUR 750 million Pillar Two threshold can face a 15% minimum. Transfer pricing, interest limitation and substance tests sit around that headline. If management, contracts and people remain in the United States, the 12.5% rate is not the planning answer, and U.S. CFC, GILTI-style and state-nexus rules can still attach to the profits.

A U.S. citizen who relocates to Ireland becomes an Irish resident taxed on worldwide income without leaving the U.S. worldwide system. Foreign tax credits and the U.S.–Ireland treaty can reduce double tax. They do not delete Form 1040, FBAR-style reporting or the need to prove that the Irish company is actually trading in Ireland. Use Ireland when the business will be Irish. Use the United States when the personal investment stack and U.S. market are the point.

Which one fits you

🇺🇸 Choose United States if you're a…

High-salary employees comparing take-home pay
Investors facing 33% Irish CGT
People who will remain U.S. persons

🇮🇪 Choose Ireland if you're a…

Trading companies with Irish people, premises and management
Multinationals using Ireland's treaty and EU base
Founders who will actually live the Irish substance story

Frequently asked questions

Is Ireland lower tax than the United States?

For trading companies with substance, Ireland's 12.5% rate can be lower than 21% U.S. federal corporate tax. For personal salary, CGT and VAT, the United States is usually lighter on federal headlines.

Do U.S. citizens escape U.S. tax by moving to Ireland?

No. U.S. citizens remain taxable on worldwide income. Irish PAYE, USC and PRSI can apply as well, with credits and the treaty used to limit double tax.

Does every Irish company get 12.5%?

No. The 12.5% rate is for trading profits. Many passive items are 25%, and the rate is not a substitute for Irish substance, transfer pricing or CFC analysis.