ISAs explained
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What is an ISA allowance?

Every tax year (that runs from April 6th to April 5th), the government gives us all an ISA allowance. This is the most you can pop into all your ISAs that year. Right now, for adults, that's £20,000. You can put all of that into one type of ISA, or spread it across a few, as long as you don't go over your total allowance.

It's all about making your money work harder for you, tax-efficiently.

What is the tax year end and why is it important?

The UK tax year ending on 5 April is particularly important for ISAs because:

Your ISA allowance for the year resets on 6 April. This means any unused allowance from the current tax year (which ends on 5 April) will be lost. It's your last chance to make the most of your tax-free savings for that year before a new allowance becomes available.

Which ISA is best for me?

The right ISA depends on your goals, timeline, and how much access you need to your money. Here's an example of how to match your ISA to your life.

ISA goal chart

Should I open an ISA or standard savings account?

The key difference between ISAs and standard savings accounts is tax. ISAs offer completely tax-free interest, while standard savings account are taxed once your interest earned exceeds your personal savings allowance.

Compare the key features below:

Feature ISA Savings account
Tax on interest Tax-free Subject to tax if over Personal Savings Allowance
Annual contribution limit £20,000 allowance per tax year No contribution limit
Age requirement 18+ for cash ISA, 18-39 for Lifetime ISA, under 18 for Junior ISA Varies by provider (typically 16+ or 18+)
Multiple accounts One cash ISA with Nottingham Building Society per tax year Multiple accounts allowed with same provider
Government bonus  25% bonus on Lifetime ISA contributions (up to £1,000 a year)  No Government bonus available 
FSCS protection  Eligible deposits are protected by the Financial Services Compensation Scheme Eligible deposits are protected by the Financial Services Compensation Scheme


What's the difference between Personal Savings Allowance and ISA allowance?

ISA allowance and Personal Saving Allowance (PSA) are completely different tax benefits; you can however use both together in a tax year for maximum tax-free savings.

For example, you could open a cash ISA and a fixed rate bond in the same tax year to maximise both your ISA allowance and Personal Savings Allowance tax-free interest.

What is Personal Savings Allowance?

Your Personal Savings Allowance is the amount of interest you can earn from standard savings accounts before paying tax. It's automatic - you don't need to apply for it, but the amount depends on your income tax bracket.

Personal savings allowance tax brackets:

  • Basic rate (20%): £1,000 tax-free interest from standard savings accounts.
  • Higher rate (40%): £500 tax-free interest if you're a higher-rate taxpayer.
  • Additional rate: (45%): £0 tax-free.
  • Applies to interest from non-ISA savings accounts.

You will be subject to tax if you go over your personal savings allowance.

ISA allowance

  • £20,000 you can save in ISAs each tax year.
  • All interest is tax-free, regardless of amount.
  • Doesn't count towards your Personal Savings Allowance.
  • Must open an ISA to benefit.

This tax-free status is what makes ISAs so valuable. Even basic rate taxpayers can benefit, especially as your savings grow over time. The tax advantages become even more significant for higher rate taxpayers who have smaller personal savings allowances.

How to open an ISA

What you'll need:

  • Valid photo ID (passport or driving licence).
  • Proof of address (utility bill or bank statement).
  • National Insurance number.
  • Minimum opening deposit (this varies for different ISAs).
  • Details of any existing ISAs you want to transfer.

You can open an ISA online or in any of our branches.

Compare our ISAs

Take a look at the ISAs we have available for you to open.

Bonus Access ISA
Interest rate gross/tax-free p.a./AER* 4.05%
Type of account
Withdrawals Unlimited
Open with £10
Open and manage
  • Online
1 Year Fixed Rate ISA
Fixed until 28th October 2026
Interest rate gross/tax-free p.a./AER* 4.00%
Type of account
  • Fixed rate ISA
  • Fixed term
  • Limited access
Withdrawals No withdrawals until 29/10/2026. Transfers to other providers subject to loss of interest
Open with £500
Open and manage
  • Branch
  • or
  • Online
2 Year Fixed Rate ISA
Fixed until 29th September 2027
Interest rate gross/tax-free p.a./AER* 4.00%
Type of account
  • Fixed rate ISA
  • Fixed term
  • Limited access
Withdrawals No withdrawals until 30/09/2027. Transfers to other providers subject to loss of interest
Open with £500
Open and manage
  • Branch
  • or
  • Online
3 Year Fixed Rate ISA
Fixed until 27th September 2028
Interest rate gross/tax-free p.a./AER* 4.00%
Type of account
  • Fixed rate ISA
  • Fixed term
  • Limited access
Withdrawals No withdrawals until 28/09/2028. Transfers to other providers subject to loss of interest
Open with £500
Open and manage
  • Branch
  • or
  • Online
5 Year Fixed Rate ISA
Fixed until 30th September 2030
Interest rate gross/tax-free p.a./AER* 4.10%
Type of account
  • Fixed rate ISA
  • Fixed term
  • Limited access
Withdrawals No withdrawals until 01/10/2030. Transfers to other providers subject to loss of interest
Open with £500
Open and manage
  • Branch
  • or
  • Online
Lifetime ISA
Interest rate gross/tax-free p.a./AER* 2.50%
Type of account
Withdrawals Only to purchase first house or aged 60+
Open with £1
Open and manage
  • Online
Triple Access ISA
Interest rate gross/tax-free p.a./AER* Conditional bonus rate: 3.50%

Standard rate: 2.10%
Type of account
Withdrawals Three withdrawals per interest year
Open with £500
Open and manage
  • Branch
Flexible Easy Access ISA
Interest rate gross/tax-free p.a./AER* 2.05%
Type of account
Withdrawals Unlimited
Open with £1
Open and manage
  • Branch
Junior ISA
Interest rate gross/tax-free p.a./AER* 4.05%
Type of account
Withdrawals No access until the child is 18
Open with £1
Open and manage
  • Branch
Account Name Interest rate
gross/tax-free p.a./AER*
Type of account Withdrawals Open with Open and manage
Bonus Access ISA 4.05%
  • Easy access
  • Cash ISA
Unlimited £10
  • Online
More details
1 Year Fixed Rate ISA
Fixed until 28th October 2026
4.00%
  • Fixed rate ISA
  • Fixed term
  • Limited access
No withdrawals until 29/10/2026. Transfers to other providers subject to loss of interest £500
  • Branch
  • or
  • Online
More details
2 Year Fixed Rate ISA
Fixed until 29th September 2027
4.00%
  • Fixed rate ISA
  • Fixed term
  • Limited access
No withdrawals until 30/09/2027. Transfers to other providers subject to loss of interest £500
  • Branch
  • or
  • Online
More details
3 Year Fixed Rate ISA
Fixed until 27th September 2028
4.00%
  • Fixed rate ISA
  • Fixed term
  • Limited access
No withdrawals until 28/09/2028. Transfers to other providers subject to loss of interest £500
  • Branch
  • or
  • Online
More details
5 Year Fixed Rate ISA
Fixed until 30th September 2030
4.10%
  • Fixed rate ISA
  • Fixed term
  • Limited access
No withdrawals until 01/10/2030. Transfers to other providers subject to loss of interest £500
  • Branch
  • or
  • Online
More details
Lifetime ISA 2.50%
  • Cash ISA
Only to purchase first house or aged 60+ £1
  • Online
More details
Triple Access ISA Conditional bonus rate: 3.50%

Standard rate: 2.10%
  • Easy access
  • Cash ISA
  • Limited access
Three withdrawals per interest year £500
  • Branch
More details
Flexible Easy Access ISA 2.05%
  • Flexible ISA
  • Cash ISA
Unlimited £1
  • Branch
More details
Junior ISA 4.05%
  • Children's
  • Cash ISA
No access until the child is 18 £1
  • Branch
More details

Frequently asked questions

What does ISA mean?

ISA stands for Individual Savings Account.

Are ISAs tax free?

Yes, ISAs are completely tax-free. This means:

  • No tax on interest or growth: Any interest you earn on a cash ISA or growth on any other ISA type is yours to keep. The Government won't take a slice.
  • No income tax: You won't pay income tax on any returns from your ISA, unlike standard savings accounts where you might pay tax if you earn more than your Personal Savings Allowance.
  • Withdrawals are tax-free: When you take money out of your ISA, it's not counted as taxable income.

This tax-free status is what makes ISAs so valuable. Even basic rate taxpayers can benefit, especially as your savings grow over time. The tax advantages become even more significant for higher rate taxpayers who have smaller Personal Savings Allowances.

How many ISAs can I have?

There is no limit to how many ISAs you can have in a tax year (except with a Junior ISA). What this means is you could open one cash ISA with us and another with a different financial provider subject to their conditions.

With Nottingham Building Society, you can open different ISA types with us, such as

  • One Cash ISA (You can only open and pay into one cash ISA with us per tax year using your ISA allowance)
  • One Lifetime ISA (You can only open and pay into one Lifetime ISA per tax year)

Whilst we do not offer stocks and shares and innovative finance ISAs, you will be able to open one of these with another provider alongside your cash ISA and Lifetime ISA with us.

Can I transfer my ISA to another provider?

Great news! You can move money you've saved in your ISA from past tax years, and even this current one, into a new ISA - and it will keep its tax-free perk. Want to switch your ISA to a different provider? You can do that whenever it suits you.

  • Just make sure you don't close your old ISA before opening a new one, as that would affect its tax-free benefit. 
  • To keep things simple and tax-free, your new ISA provider needs to arrange the transfer directly with your current one.
  • Just ask them to sort it for you. While your current provider can't stop you from transferring, they might charge a fee for the switch.

You can also transfer from a stocks and shares ISA to a cash ISA. But you must transfer all of the money in your current tax year's ISA; you can’t leave some in the old account.

You can, if you wish, also transfer some, or all, of the money you put into this ISA in previous years without affecting your current ISA allowance.
You can transfer your ISA to us by following our ISA transfer process.

How do ISAs work?

ISAs work by providing a tax-free wrapper around your savings or investments. Here's how cash ISAs work at Nottingham Building society.

Opening your ISA

  • Open with as little as £1 (this can vary by the type of ISA).
  • Make regular payments or lump sum deposits.
  • Stay within your £20,000 annual allowance.
  • Choose from easy & limited access, fixed rate, or flexible ISA options.

How interest works

  • Interest is calculated daily on your balance.
  • Usually paid monthly or annually (depending on the ISA type).
  • No tax deductions - you keep 100% of the interest you earn.

Managing your ISA

  • Check your balance online or in branch depending which account you have with us.
  • Make withdrawals when you need (access varies by ISA type i.e. a fixed rate ISA and easy access ISA will have different access rules). 
  • Top up throughout the tax year up to your ISA allowance (again this varies across different ISA types).
  • Transfer your ISA to us or other providers if you want to switch.

It's that simple - your money grows tax-free while staying secure and accessible.

How much do you need to open an ISA?
  • Our flexible easy access cash ISA requires just £1 to open. 
  • Fixed rate ISAs typically need £500 minimum. 
  • Check individual product terms for specific requirements.
When can I open new ISA?

You can open a new ISA account with us at any time during the tax year (6 April to 5 April) if you haven’t already opened a cash ISA, Lifetime ISA or Junior ISA with us.

Age requirements to open an ISA

  • Cash ISAs can be opened from the age of 18.
  • Lifetime ISAs can only be opened between the ages of 18-39.
  • A Junior ISA can only be opened when the child the account for is aged 17 or under. If the child is aged 16-17 the account can be opened by the child themselves.
Can I open a joint ISA?

No, you cannot open a joint ISA. ISAs must be held in one person's name only - that's why they're called Individual Savings Accounts. However, couples can each have their own ISAs and both benefit from the full £20,000 annual allowance, giving you £40,000 of tax-free savings between you each year.

Can I withdraw money from my cash ISA?

You can put money in and take money out of an ISA whenever you wish (if the terms of your account allow) but try not to dip into your ISA savings unless absolutely necessary. This is because you can only put in an annual total of £20,000 into your ISA, whether you take any out or not, and could potentially lose the tax-free status on it.

Free, impartial financial support

We believe that access to impartial guidance is important for your financial well-being. That's why we're thrilled to highlight the invaluable resource of free independent guidance available through MoneyHelper, who serves as a beacon of support for individuals seeking clarity and direction in their financial journey. Their wealth of resources and expertise aim to empower you as well as support you during difficult times.

Savings FAQs

If you have any questions about savings products and account you should visit our savings FAQs page.

Cash ISA explained

Understand what a cash ISA is, how it works, and how you can save tax-free. Learn the benefits, rules, and options to make the most of your savings.

Understanding savings terms

Let us explain the jargon related to savings accounts, such as what base rate means, what a Lifetime ISA is, what AER means and what tax-free means.