Money market funds (MMFs) have become one of the most popular places to park cash in 2026. With the Bank of England base rate at 3.75% and inflation at 3.0%, MMFs are paying yields close to the base rate — often beating easy-access savings on larger sums, with next-day liquidity and very low risk. This guide ranks the best UK money market funds for April 2026 and explains how they fit into a savings strategy.
Quick Answer
The best UK money market funds currently yield around 4.50%–4.75% after fees — close to the Bank of England base rate of 3.75% (gross of fees). They invest in short-term government and corporate debt, offer T+1 access in most cases, and are typically used inside a Stocks & Shares ISA or General Investment Account. They are not FSCS-protected like cash savings, but the underlying assets are very low risk.
What Is a Money Market Fund?
A money market fund is a collective investment fund that buys very short-dated, high-quality debt — typically UK Treasury bills, corporate commercial paper and certificates of deposit. The fund’s average maturity is usually under 60 days, so the price is extremely stable and the yield closely tracks the Bank of England base rate. MMFs are designed to behave like cash, but earn a market rate of interest rather than a bank’s discretionary savings rate.
In the UK, MMFs are heavily regulated under EU Money Market Fund Regulations (retained post-Brexit), which set strict rules on credit quality, diversification and liquidity. The vast majority of UK MMFs are AAA-rated by Fitch, Moody’s or S&P.
Best UK Money Market Funds 2026
We’ve selected the top UK-domiciled MMFs based on yield, fees, minimum investment, and ease of access via mainstream platforms.
| Fund | 7-Day Yield | OCF (Fees) | Min Investment | Available On |
|---|---|---|---|---|
| Royal London Short Term Money Market | 4.72% | 0.10% | £100 | Most platforms |
| Fidelity Cash Fund | 4.68% | 0.15% | £500 | Fidelity, AJ Bell, HL |
| L&G Cash Trust | 4.65% | 0.13% | £100 | Most platforms |
| BlackRock ICS Sterling Liquidity | 4.70% | 0.20% | £1,000 | HL, Interactive Investor |
| abrdn Sterling Money Market | 4.55% | 0.16% | £500 | Most platforms |
| HSBC Sterling Liquidity | 4.60% | 0.18% | £1,000 | HSBC, HL |
Yields are 7-day net yields as of April 2026, after the Ongoing Charges Figure (OCF). Yields fluctuate daily — check your platform for live figures.
Top Funds Reviewed
Royal London Short Term Money Market — 4.72% yield
Royal London’s fund is one of the largest UK MMFs and consistently sits near the top for net yield, partly thanks to a low 0.10% OCF. The fund holds primarily UK Treasury bills and high-grade commercial paper. Available on virtually every UK platform with a £100 minimum.
Best for: Most retail investors looking for a simple, low-cost option.
Fidelity Cash Fund — 4.68% yield
Fidelity’s Cash Fund is a popular default cash holding inside Fidelity ISAs and SIPPs. Slightly higher 0.15% OCF, but excellent liquidity and a very stable price. Trades T+1 like most MMFs.
L&G Cash Trust — 4.65% yield
Legal & General’s Cash Trust is widely available on platforms and combines a tight 0.13% OCF with a diversified portfolio of sterling money market instruments. A solid all-rounder.
BlackRock ICS Sterling Liquidity — 4.70% yield
BlackRock’s institutional-quality MMF is available to retail investors on a few platforms. The 0.20% OCF is on the higher side, but yield is competitive. The fund is AAA-rated by all three major rating agencies.
Money Market Fund vs Savings Account
MMFs and high-yield savings accounts now offer broadly similar yields — around 4.5%–4.85%. Here’s how they differ:
| Feature | Money Market Fund | Savings Account |
|---|---|---|
| Yield | 4.50%–4.75% (variable) | 4.50%–4.85% AER |
| Access | T+1 (next business day) | Instant or notice |
| Protection | None (fund structure) | FSCS up to £85,000 |
| Tax wrapper | Held inside ISA / SIPP / GIA | Cash ISA or taxable |
| Capital risk | Very low (but not zero) | Zero (within FSCS) |
| Suitability | Larger pots, ISA cash leg | All sizes, emergency funds |
Are Money Market Funds Safe?
MMFs are considered the safest type of investment fund. They invest only in short-dated, high-quality debt, and the largest UK funds hold AAA ratings. However, MMFs are not covered by the FSCS in the same way bank deposits are. Investors are protected by the FSCS up to £85,000 if the platform or fund operator goes bust, but the underlying investments themselves can — in theory — fall in value, although significant losses in sterling MMFs are extremely rare.
The only major historical loss in a money market fund globally was the Reserve Primary Fund in the US in 2008, when it “broke the buck” by exposure to Lehman Brothers debt. UK regulations introduced after the financial crisis make a similar event very unlikely.
How to Buy a Money Market Fund
You can’t buy a money market fund directly from a bank — they trade on investment platforms. Open an account with a platform such as Hargreaves Lansdown, Interactive Investor, AJ Bell, Fidelity or Vanguard. Search for the fund by name or ISIN, and place a buy order. Most MMFs settle T+1, meaning the cash leaves your account the next business day and units appear in your portfolio.
You can hold MMFs inside three main wrappers:
- Stocks & Shares ISA — yields are tax-free, up to £20,000 deposit per tax year.
- SIPP — useful for the cash leg of a pension portfolio, or while waiting for an opportunity to invest.
- General Investment Account (GIA) — taxable, but no contribution limits.
Inside an ISA, an MMF is one of the most tax-efficient ways to hold cash, particularly if you’ve maxed out your Cash ISA elsewhere or want everything inside a single S&S ISA.
Pros and Cons of Money Market Funds
Pros: Yields close to the base rate, T+1 liquidity, very low capital risk, hold inside an ISA for tax-free yield, no rate-cut surprises like easy-access accounts (the yield reflects market rates daily), suitable for very large pots beyond FSCS limits.
Cons: Not FSCS-protected like cash, fees reduce headline yield, T+1 access slower than instant-access savings, yield falls when the base rate is cut, and platform fees may apply on top of the OCF.
Who Should Use a Money Market Fund?
MMFs are most useful for three groups: investors with large cash pots above the £85,000 FSCS limit who want one tidy holding rather than spreading across many banks; investors with cash inside an ISA or SIPP that they don’t want exposed to equity market risk; and tactical investors waiting for an opportunity to deploy capital but wanting a competitive yield in the meantime.
If you have under £85,000, a top easy-access savings account or Cash ISA is usually simpler and equally remunerative. See our best high-yield savings accounts guide for current top rates.
Tax Treatment
Outside an ISA or SIPP, the income from a money market fund is taxed as interest (not dividends), so it falls under your Personal Savings Allowance — £1,000 for basic-rate, £500 for higher-rate, nil for additional-rate. Above the PSA, it’s taxed at your marginal rate. Inside an ISA or SIPP, all yield is tax-free.
Because the fund’s price is essentially flat, there’s typically no capital gain to worry about. Selling units returns roughly your purchase price plus any accrued income, depending on whether the fund is income-paying or accumulation.
Frequently Asked Questions
Can I lose money in a money market fund?
In theory yes, but in practice losses in UK sterling MMFs are extremely rare. The funds hold short-dated, high-grade debt and are designed to keep capital stable.
How quickly can I access my money?
Most MMFs settle T+1 — you place a sell order, and the cash hits your platform balance the next business day. Withdrawing from the platform to your bank may take a further 1–2 days.
Are money market funds the same as money market accounts?
No. “Money market account” is a US term for a type of bank savings account. UK money market funds are collective investment funds you buy on an investment platform.
Do MMFs pay income or accumulate?
Most have both versions: an “Income” share class pays interest as cash (typically monthly), and an “Accumulation” share class rolls it back into the unit price.
What’s the difference between a “Short Term” and a “Standard” MMF?
Short Term MMFs hold debt with a weighted average maturity of 60 days or less, while Standard MMFs can extend to 6 months. Short Term funds are slightly safer but typically yield a little less.
Related Articles
- Best High-Yield Savings Accounts UK 2026
- Best Short-term Fixed Rate Bonds UK 2026
- Best Cash ISA Rates UK 2026
- Best Stocks and Shares ISA UK 2026
- How to Start Investing UK Beginner’s Guide 2026
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