Whether a savings account or ISA is better depends on your tax situation, the amount you are saving, and your need for access. ISAs are tax-free, ideal for larger sums exceeding the £1,000 (basic rate) or £500 (higher rate) Personal Savings Allowance. Standard savings accounts often offer higher interest rates, allowing for better growth on smaller amounts.
The main difference is that a cash ISA is a tax-efficient way to save money. Interest on your savings is paid free from UK income tax and capital gains tax. While both could help your money grow, choosing the right one (or a combination of both) for your circumstances can help maximise your money's growth potential.
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If you're not paying tax on your savings interest, cash ISAs have no benefit – so many should ditch them for higher-paying standard accounts. That's the message from MoneySavingExpert.com founder Martin Lewis in the third episode of the latest series of ITV's The Martin Lewis Money Show Live.
One Lifetime ISA (LISA) per tax year
While you can save up to £20,000 in ISAs overall each year, you can only pay into one LISA per tax year, and the maximum LISA contribution is £4,000. You can use a LISA to: buy your first home worth up to £450,000, or.
You can get around 7% interest on savings in the UK primarily through Regular Saver accounts, with top offers from Zopa (7.1% variable), First Direct (7% fixed), and the Co-operative Bank (7% variable), though these often require you to have their current account and limit monthly deposits, while Principality Building Society has offered rates near this (7.5%) on fixed-term savers, so check MoneySavingExpert and MoneyWeek for current deals.
Plans by chancellor Rachel Reeves to reduce the amount that savers may put into cash ISAs will upset millions of people but not achieve what she wants, money expert Martin Lewis is warning.
The idea is to spend 50% of your after-tax income on essential needs, 30% on things you want, and pay 20% into a savings account. Of course, you can aim to save 30% of your income and spend 20% of it on your wants. If saving 20% isn't realistic, aim for a slightly lower amount, such as 10% or even 5%.
The 7-3-2 rule is a financial strategy for wealth building, suggesting it takes 7 years to save your first major financial goal (like a crore), then accelerating to achieve the next goal in 3 years, and the third goal in just 2 years, leveraging compounding and disciplined, increased investments (like a 10% annual SIP hike). It highlights how returns compound faster over time, drastically reducing the time needed for subsequent wealth targets, emphasizing patience and consistent, growing contributions.
Isa providers are obliged to provide contribution histories to HMRC. If you go over your limit without realising it, HMRC will contact you and you can arrange to correct the underpaid tax.
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Don't let a late start stop you from saving. If you are a later investor, say in your 50s or 60s, don't worry. It's not too late to plan and save for retirement. It's more about making the right investment choices for you.
Disadvantages: Interest rates may decrease, funds might be locked in fixed-rate ISAs, and not all accounts permit transfers, sometimes incurring exit fees.
Money market funds typically offer higher interest rates than regular savings accounts, helping your money grow faster.
There are two reasons to open a savings account over a Cash ISA. The interest rate is better than the ISA AND the interest earned is below your personal savings allowance so you don't pay any tax on it. This is pretty rare in the current market but wasn't the case a few years back.
The 3-6-9 rule in finance is a guideline for building an emergency fund, suggesting you save 3 months of essential expenses for stable jobs, 6 months for most people (especially those with families/mortgages), and 9 months for those with irregular income (freelancers, sole earners) or high financial risk. It's a flexible strategy to provide financial security, helping you avoid debt or panic withdrawals during unexpected job loss or emergencies, with the exact target depending on your income stability and dependents.
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According to Finder, the average person in the UK has £16,067 in savings in 2025. However, 2 in 5 Britons (39%) have £1,000 or less in savings, and a quarter of Britons (23%) have £200 or less. 1 in 6 UK adults (16%) have no savings at all, equating to around 8.4 million people.
Cash ISAs are tax-free. You won't pay tax on any interest you earn. At NatWest, we offer an instant access Cash ISA, and a Fixed Rate ISA with a set term. On the other hand, the interest you make on normal savings accounts may be taxed, if it's more than your Personal Savings Allowance.
Is £100,000 savings good in the UK? Yes. £100,000 is five times the annual ISA tax-free savings allowance and approximately ten times the UK average in savings. But if your AER (Annual Equivalent Rate) is lower than the rate of inflation, your money will lose value every year.
What were the Cash ISA changes announced in the Autumn Budget? The Budget confirmed that the Cash ISA allowance is set to be cut from April 2027. For under-65s, the Cash ISA allowance will reduce from £20,000 to £12,000. For 65s, and older, the Cash ISA allowance will remain at £20,000.
Investing smartly and realistically
Twenty grand is a good amount actually, as it easily allows an investor to diversify across a few different shares. That is a simple but important risk management principle and £20k could also typically be invested as one year's ISA allowance.
If you want to invest $10,000 over 10 years, and you expect it will earn 5.00% in annual interest, your investment will have grown to become $16,288.95.
The interest you earn on £50,000 over one year will depend on the interest rate of the account. If you deposit this amount into an account paying 4.00% AER, you would earn £2,000 in interest after one year.