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US citizens in the UK · Institutions

Which Cynergy Bank accounts accept US citizens

Last checked

Cynergy Bank has been checked for US citizens across 2 account types. Both are open to a US person.

If you already have an account with Cynergy Bank, a second one there is usually the easier application, because Cynergy Bank 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

Savings accounts

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Opens

Open to anyone 18 or over who is a UK resident for tax purposes, with no requirement to be tax resident only in the UK. The US taxes the interest as ordinary income.

FSCS £120,000 · online

Account Terms The catch
1 Year Fixed Rate Bond
Access
Fixed term
Rate
4.35% AER, fixed
Term
1 year
Min
£1,000
Max
£1,000,000
Rate as of
 Money is locked away for the full year.
Online Notice Saver
Access
Notice
Rate
4.18% AER, variable
Min
£500
Max
£1,000,000
Rate as of
 Top rate needs 120 days notice; the 35 and 95 day options pay less.
Online Easy Access Account
Access
Easy access
Rate
4.15% AER, variable
Then
2.15%
Min
£1
Max
£1,000,000
Rate as of
 Includes a 2.00% bonus that falls away after 12 months, and withdrawals only go to your nominated account.

Source: Cynergy Bank savings rates, 2026-08-17 Last checked Cynergy Bank's own page

Cash ISAs

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Opens

Cynergy asks only that you are 18 or over and a UK resident for tax purposes, and its cash ISA terms repeat that with no requirement to be tax resident solely in the UK. The IRS still taxes the interest as US income, as the wrapper gives no US relief.

FSCS £120,000 · online, post or phone

Account Terms The catch
2 Year Fixed Rate Cash ISA
Access
Fixed term
Rate
4.75% AER, fixed
Term
2 years
Min
£500
Rate as of
 Early closure costs 180 days of interest; customers of six months or more get a slightly better loyalty rate.
1 Year Fixed Rate Cash ISA
Access
Fixed term
Rate
4.67% AER, fixed
Term
1 year
Min
£500
Rate as of
 Early closure costs 180 days of interest.
Online ISA
Access
Easy access
Rate
4.15% AER, variable
Min
£1
Rate as of
 Deposits and withdrawals go through a nominated account only, and it is not a flexible ISA.

Source: Cynergy Bank cash ISA terms, 2026-08-17 Last checked Cynergy Bank'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.