United Kingdom vs United States — Tax Comparison 2026/27

Employees

Contractors / Self-Employed

For Employees, the US Wins at Every Income Level

The employee table above tells a one-sided story, and the reason is bracket speed. The UK's 40% higher rate starts at £50,270 — roughly $67,000 — while an American doesn't hit a comparable federal rate until well past $100,000. US FICA (Social Security + Medicare) charges from the first dollar, which keeps the race close at lower salaries, but once UK income crosses into the 40% band the gap grows quickly: a few thousand dollars at $60K, and five figures by $150K.

The £100K Trap Makes It Worse for High Earners

Between £100,000 and £125,140 the UK withdraws the personal allowance at £1 for every £2 earned, producing an effective 60% marginal rate on that band. The US has no equivalent cliff — brackets rise smoothly to 37%. A remote worker whose salary converts to just over £100K should weigh salary-sacrifice pension contributions in the UK; in the US, they'd simply keep the raise.

State Taxes vs Scottish Rates — the Caveat That Narrows the Gap

The US figures on this page are federal-only. State income tax adds anywhere from nothing (Texas, Florida and seven others) to over 13% (California), and a few cities add their own on top. The UK figure is the whole story for England, Wales and Northern Ireland — there is no local income tax — though Scotland sets its own bands with a higher top rate. In a no-tax state the US advantage above is real and full-sized; in California or New York City, state and city tax can claw back most of it.

Contracting Is the UK's Best Case

An American contractor pays 15.3% self-employment tax (both halves of FICA) before income tax even starts. A UK sole trader pays Class 4 National Insurance at just 6% in the main band and 2% above it — roughly nine percentage points lighter on most of a mid-range income. That's why the contractor table looks so different from the employee one: the UK actually comes out ahead at $60K, and stays within a rounding error at $100K. Only at higher incomes do the US's wider income tax brackets overwhelm the NI advantage. If you're a freelancer choosing between the two, the UK penalty is far smaller than the employee numbers suggest.