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US citizens in the UK · Institutions

Which Principality Building Society accounts accept US citizens

Last checked

Principality Building Society has been checked for US citizens across 3 account types. All 3 are open to a US person (1 with strings).

If you already have an account with Principality Building Society, a second one there is usually the easier application, because Principality Building Society has already checked who you are. Each account below carries its verdict, the evidence behind it and the date it was checked.

At a glance

Account Verdict Last checked
Savings accounts Opens
Cash ISAs Opens
Mortgages With strings

Savings accounts

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Opens

Opens to UK residents; its self-certification form asks whether you are a US citizen and records a non-UK tax residency alongside the UK rather than refusing it. Several products are branch or agency only. The US taxes the interest as ordinary income.

FSCS £120,000 · online, branch, agency or post

Account Terms The catch
1 Year Regular Saver Bond
Access
Regular saver
Rate
4.85% AER, fixed
Min
£1
Max
£3,000
Rate as of
 Up to £250 a month to a £3,000 ceiling, and no withdrawals for the year.
1 Year Fixed Rate Bond
Access
Fixed term
Rate
4.45% AER, fixed
Term
1 year
Min
£500
Max
£2,000,000
Rate as of
 No withdrawals and no closing early, and the first payment must land within five business days.
2 Year Fixed Rate Bond
Access
Fixed term
Rate
4.25% AER, fixed
Term
2 years
Min
£500
Rate as of
 Issue 554: no withdrawals and no closing early, and the first payment must land within five business days. Interest paid monthly or annually at the same AER.
Online Bonus Triple Access
Access
Easy access
Rate
4.30% AER, variable
Then
2.35%
Min
£1
Max
£1,000,000
Rate as of
 Online only, three withdrawals a year, and 1.95% of that rate is a bonus that stops after 12 months, leaving 2.35%.

Source: Principality savings rates, 2026-08-17 Last checked Principality Building Society's own page

Cash ISAs

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Opens

The savings terms ask that you are a UK resident with your permanent home in the UK, which is a home test rather than a sole-tax-residency test, so it does not exclude a US citizen living here. The IRS still taxes the interest as US income, as the wrapper gives no US relief.

FSCS £120,000 · online or branch, and branch-named accounts must be opened in branch

Account Terms The catch
1 Year Fixed Rate Cash ISA
Access
Fixed term
Rate
4.50% AER, fixed
Term
1 year
Min
£500
Rate as of
 Early closure costs 90 days of interest, and you must keep the £500 minimum.
2 Year Fixed Rate Cash ISA
Access
Fixed term
Rate
4.35% AER, fixed
Term
2 years
Min
£500
Rate as of
 Early closure costs 180 days of interest.
Online Bonus Triple Access Cash ISA
Access
Easy access
Rate
4.25% AER, variable
Then
2.35%
Min
£1
Rate as of
 Includes a 1.90% bonus for 12 months, then it falls to 2.35%. Three withdrawals a year.

Source: Principality savings terms and cash ISA pages, 2026-08-17 Last checked Principality Building Society's own page

Mortgages

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With strings

US persons: two years of UK address history and a visa with twelve months to run

Citizenship is not the barrier. A non-EEA national needs indefinite leave to remain or more than twelve months left on a visa, plus two years of UK address history, and only sterling income subject to UK tax is counted.

Direct or through a broker · two years of UK address history, visa with twelve months left

Account Terms The catch
Fixed to 30 November 2028
Rate
4.95%, fixed
Then
6.25% for three years, then 6.80% standard variable rate
Term
Fixed to 30 November 2028
Max LTV
85%
Product fee
£895
Rate as of
 Minimum loan £140,000, maximum £1,000,000, no valuation fee. A fee free version at the same loan to value is 5.28% and takes loans from £5,000.
Fixed to 30 November 2031
Rate
4.99%, fixed
Then
6.80% standard variable rate
Term
Fixed to 30 November 2031
Max LTV
85%
Product fee
£895
Rate as of
 Minimum loan £140,000, maximum £1,000,000, no valuation fee.

Source: Principality residential lending criteria, 2026-08-17 Last checked Principality Building Society's own page

Account names link to the provider's own site. momo has no active affiliate partnerships; if that changes it will be disclosed and will never change a verdict. Every institution, A to Z.

Confirm your own position with a cross-border specialist. Acceptance policies and tax rules change, and your facts may differ from the general case. Rates and terms here are the provider's published figures rather than an offer, and the provider decides each application on its own criteria. Use this as a map, not a ruling. Last checked .
Tax

FATCA

FATCA makes UK banks report accounts held by US persons to the IRS. It is not a tax; it is a reporting trail. Where it bites is access.

 Tax

FBAR

If your foreign accounts top $10,000 combined at any point in the year, you file an FBAR. What counts, when it is due, and what happens if you miss it.

 Tax

ISA US tax

The IRS does not recognise the ISA wrapper. Cash ISA interest and stocks ISA gains are taxable on your US return, and fund holdings drag in PFIC rules.