XTB Cash ISA Review: A Chart Topping 6% For New Cutomers
Account: XTB Cash ISA
Description: Online trading platform XTB has launched a headline-grabbing 6% AER flexible Cash ISA, instantly placing it among the most competitive easy-access ISA rates on the market. At first glance, it looks like a market-leading deal. However, the generous rate comes with important conditions that savers should understand before transferring funds.
Is XTB's Cash ISA Any Good?
The 6% Is Only for 90 Days
The advertised 6% AER is not a fixed long-term rate. It is made up of a 4% standard variable rate plus a 2% promotional boost. That boost lasts for 90 days from the date the ISA is opened. After the 90-day period ends, the rate automatically reverts to XTB’s standard variable rate, currently 4% AER.
Crucially, the offer only applies to new clients who open a Cash ISA or Stocks & Shares ISA between 1 March and 30 April 2026. If you open outside that window, you will not receive the 6% rate. Existing clients receive the standard 4% variable rate from the outset.
The Rate Is Variable?
Even after the promotional period ends, the 4% rate is not guaranteed. XTB’s ISA terms confirm that interest is calculated daily and credited monthly at a variable rate that may change. This means the base rate could rise or fall depending on market conditions. The 6% headline figure is therefore a short-term incentive rather than a fixed return.
Is Your Money Held in a Bank or a Money Market Fund?
Another key consideration is where client money is held. XTB states that Cash ISA funds may be placed in segregated client money bank accounts or in one or more Qualifying Money Market Funds (QMMFs).
If funds are placed in a QMMF, they are not treated as bank deposits and do not benefit from traditional FSCS deposit protection in the same way as money held in a bank account. Instead, they fall under FCA client asset rules, with FSCS investment protection potentially applying in the event of firm insolvency, but not against investment losses.
Is XTB’s Cash ISA worth it?
XTB’s 6% Cash ISA is competitive, but only for three months. After that, savers revert to a variable rate that could change. Combined with the possibility that funds may be held in a money market fund rather than a traditional bank account, the headline rate deserves closer inspection before making a decision.
If you are putting money away in the long run, the stock market can offer much better returns, so investing in a stocks and shares ISA may make you more money.
Pros
- Excellent interest rates
- Flexible
- Also offers investment ISAs
Cons
- Rate drops to 4%
- Money market funds
- Attached to a trading platform
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Expert Rating
(5)
Overall
5
Richard is the founder of the Good Money Guide (formerly Good Broker Guide), one of the original investment comparison sites established in 2015. With a career spanning two decades as a broker, he brings extensive expertise and knowledge to the financial landscape.
Having worked as a broker at Investors Intelligence and a multi-asset derivatives broker at MF Global (Man Financial), Richard has acquired substantial experience in the industry. His career began as a private client stockbroker at Walker Crips and Phillip Securities (now King and Shaxson), following internships on the NYMEX oil trading floor in New York and London IPE in 2001 and 2000.
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