What is a money market account and is it worth it in the UK?

Full answer

In the UK, money market account is not a single regulated product name, so it is worth being precise. The term is generally used for either a high-interest savings or notice account, or a money market fund (a low-risk pooled investment that holds short-term instruments such as Treasury bills, certificates of deposit, and short-term bank deposits). The shared aim is to earn a modest, relatively stable return on cash that is held for the short term, with easy or fairly quick access. How it works: your money is placed where it can earn interest from very short-dated, high-quality borrowers. A savings or notice account pays a stated rate and, if it is a deposit account with an authorised bank or building society, is typically protected by the FSCS up to the standard limit. A money market fund is an investment, not a deposit, so it is not FSCS deposit-protected in the same way and its value can in principle move, though such funds aim to preserve capital. Who it affects: savers and businesses holding cash they want to keep liquid but working harder than in a current account. Tax for 2026/27 is the key planning point. Interest is taxable savings income. The Personal Savings Allowance lets a basic-rate taxpayer earn GBP 1,000 of interest tax-free, a higher-rate taxpayer GBP 500, and additional-rate taxpayers get nothing. There is also a starting rate for savings of up to GBP 5,000 for those with low non-savings income. Above your allowances, interest is taxed at your marginal Income Tax rate. Worked example: a higher-rate taxpayer with GBP 1,500 of interest uses GBP 500 of allowance and pays 40% on the remaining GBP 1,000, a GBP 400 tax bill. To shelter interest entirely, you can use a cash ISA within the GBP 20,000 annual ISA allowance. Compare the headline rate against the after-tax return, and use the calculators below to model it.

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