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What Are the Best SIPP Cash Interest Rates in 2025?

Self Invested Personal Pensions (SIPPS) are a type of personal pension that allow you to make decisions for yourself about how your retirement savings are invested, and earnings inside a SIPP are tax-free.

You can also earn interest on any cash you hold in your SIPP – but these rates vary considerably among platforms. We have scoured the market and shared our top picks here.

You can read our top overall picks for SIPPs here.

check Fact Checked
  • By Laura Purkess
  • Published: July 2, 2025
  • Edited by: Antonia Medlicott
  • Disclosure
  • Last Update: 14 minutes ago

4.5/5

AJ Bell – Offers 2.5% interest on balances up to £10,000, with £2.65% on cash holdings up to £100,000 and 2.95% above £100,000.

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Switch your account and receive up to £500

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Refer a friend who transfers at least £10,000 and you both receive £100 in Amazon vouchers

Capital at risk.

4.5/5

interactive investor – Offers tiered interest rates on SIPP cash balances, starting at 2% for balances up to £10,000, rising to 2.75% for balances between £10,000 and £100,000, 3% between £100,000 and £1 million and 3.25% for balances over £1 million.

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Get £100 of free trades when you open an ii Stocks & Shares ISA or General Investment Account. Capital at risk. Terms & fees apply.

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Open a SIPP before 30th June and get £100 – £2,000 cashback

Capital at risk.

2.0/5

Hargreaves Lansdown – Hargreaves offers a relatively generous interest rate on SIPP cash holdings, starting at 2.6% on balances up to £10,000, rising to 2.65% on balances £50,000, 2.7% for £50,000-£100,000, and finally 3.2% on balances over £100,000. However, Hargreaves’ platform fees are also some of the highest in the industry, so it’s worth taking this into account too.

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Longest established investment platform

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One of the most comprehensive ranges of investment options

Capital at risk.

3.0/5

BestInvest – Bestinvest currently offers the most generous interest rate on SIPP cash holdings on the market, with a flat rate of 3.73%.

Capital at risk.


4.5/5

AJ Bell

– Offers 2.5% interest on balances up to £10,000, with £2.65% on cash holdings up to £100,000 and 2.95% above £100,000.

point

Switch your account and receive up to £500

point

Refer a friend who transfers at least £10,000 and you both receive £100 in Amazon vouchers

Capital at risk.

check

Reasons to use

  • Has some of the best rates on the market for low cash holdings in SIPPs (up to £10,000)
  • Low annual fees
  • Low trading fees at just £1.50
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Reasons to avoid

  • There are higher interest rates on uninvested cash at rivals
  • Custody fees are not capped on funds

I think AJ Bell is a solid offering for anyone thinking of starting investing through a SIPP, but who is also considering that they might want to hold some cash for extended periods of time.

Its interest rates on cash holdings in SIPPs are some of the best on the market for lower holdings (up to £10,000), but its fees are generally low, too.

For a detailed analysis of AJ Bell, check out our review for 2024

Read full review

4.5out of 5

point Switch your account and receive up to £500
point Refer a friend who transfers at least £10,000 and you both receive £100 in Amazon vouchers

4.5/5

interactive investor

– Offers tiered interest rates on SIPP cash balances, starting at 2% for balances up to £10,000, rising to 2.75% for balances between £10,000 and £100,000, 3% between £100,000 and £1 million and 3.25% for balances over £1 million.

point

Get £100 of free trades when you open an ii Stocks & Shares ISA or General Investment Account. Capital at risk. Terms & fees apply.

point

Open a SIPP before 30th June and get £100 – £2,000 cashback

Capital at risk.

check

Reasons to use

  • Competitive cash interest rates for higher balances
  • One of the lowest-cost providers for SIPPs
  • New SIPP customers can get between £100 and £2,000 cash back – offer ends 31 July
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Reasons to avoid

  • Not the best SIPP interest rates on the market for those with low holdings (under-£10k)
  • While an overall cost-effective platform, its trading fees are higher than some rivals at £3.99 per trade

Interactive Investor is a very low-cost SIPP overall – one of the cheapest on the market. It’s also really easy to use and the interface is super user friendly.

The SIPP interest rates aren’t ‘market leading’, but are very solid given the general usability and cost-effectiveness of the platform.

There’s a huge range of investment options available and it’s a very popular choice of platform.

The cashback offerings for opening an account are very generous lately too.

For a detailed analysis of Interactive Investor, check out our review for 2024

Read full review

2.0/5

Hargreaves Lansdown

– Hargreaves offers a relatively generous interest rate on SIPP cash holdings, starting at 2.6% on balances up to £10,000, rising to 2.65% on balances £50,000, 2.7% for £50,000-£100,000, and finally 3.2% on balances over £100,000. However, Hargreaves’ platform fees are also some of the highest in the industry, so it’s worth taking this into account too.

point

Longest established investment platform

point

One of the most comprehensive ranges of investment options

Capital at risk.

check

Reasons to use

  • Competitive SIPP rates, particularly on higher balances over £100,000
  • Largest investment platform in the UK by market share – it’s a ‘safe pair of hands’
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Reasons to avoid

  • Expensive platform charges compared to other similar providers
  • Largest investment platform in the UK by market share – it’s a ‘safe pair of hands’

Hargreaves is a very safe pair of hands and you can pretty much do everything – it’s a bit of a one-stop-shop for investing.

It still has the largest market share of all investment platforms, despite its comparatively high cost compared to newer entrants, and remains a popular choice for newcomers.

Its SIPP cash interest rates are also surprisingly generous for a more ‘old school’ platform, which goes in its favour.

It really is worth working out whether the higher fees are worth it if you’re planning to invest, though. You can try our ISA fee calculator to check what it will cost you.

To read our detailed no stone left unturned review of Hargreaves Lansdown

Read full review

3.0/5

BestInvest

– Bestinvest currently offers the most generous interest rate on SIPP cash holdings on the market, with a flat rate of 3.73%.

Capital at risk.

check

Reasons to use

  • Offers free financial advice
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Reasons to avoid

  • Interest rates information is very difficult to find

BestInvest, living up to its name, has the best SIPP cash interest rate on the market, and it’s a flat rate, meaning even those with small balances can benefit from the top rate. BestInvest is a bit clunky as a platform and this information has been difficult to get hold of, though, which marked it down a bit for me.

For a detailed analysis of BestInvest, check out our review for 2024

Read full review
ProviderInterest RateFSCS Protected?Notes
AJ BellUp to 2.95%YesTiered
BestInvest3.67% YesFlat rate
Interactive InvestorUp to 3.25%YesLower on low balances
Hargreaves LansdownUp to 3.2%YesTiered

Why are SIPP interest rates important?

It is important to also maximise any cash sat in your SIPP that is not invested in the stock market – particularly if you might hold some cash for a while, for example if you are seeking low-risk options closer to retirement or are waiting for better investment opportunities.

Many people may not even realise that you can earn interest on uninvested cash in a SIPP, but a number of providers pay rates that beat savings account rates at high street banks.

However, there is a huge variety in the rates offered across different providers. Choosing a SIPP with a lower interest rate can have a detrimental impact on your long-term pension growth if you opt to hold cash long-term, while picking one with a higher rate can boost your savings.

Be aware that overall platform charges can also vary, and you should also take this into consideration.

What else should I consider?

If you are investing for the long-term, having your pension invested is still considered to be the best way to grow your retirement funds.

You might want to hold some money in your SIPP in cash if you are closer to retirement and the stock market is volatile, or if you are particularly risk-averse.

Many SIPPs’ cash interest rates are still not beating inflation, so if you have more than 5 years before you reach retirement, it could be better to remain invested.

Pros and Cons of Holding Cash in a SIPP

Pros:

  • Capital preservation with minimal risk
  • Liquidity for opportunistic investments
  • Potential for earning interest on idle funds

Cons:

  • Lower returns compared to invested assets
  • Interest rates may not keep pace with inflation
  • Potential fees reducing net returns
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