Individual Savings Accounts
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What you need to know about your ISA allowance
ISA allowances help UK savers and investors grow their money free of tax. An ISA (Individual Savings Account) lets you save or invest up to a set limit each tax year without paying tax on the interest, dividends or capital gains. This guide explains how ISA allowances work, what the annual limit is and which types of ISA you can use, so you can get the most from your tax-free savings and investments.
What Are ISA Allowances?
An ISA allowance is the maximum amount you can subscribe to ISAs during a tax year while retaining the tax advantages provided by the ISA rules. This tax-free limit applies across all of your ISAs combined, whether you choose a Cash ISA, a Stocks & Shares ISA, an Innovative Finance ISA or a Lifetime ISA. The government sets the ISA allowance, and it can change from one tax year to the next. Any interest, dividends or capital gains made inside your ISA stay tax-free as long as you remain within the annual limit. Understanding how ISA allowances work helps you plan your savings or investments wisely and make the most of your tax-free benefits.
Getting Started with ISA Allowances
Before opening or paying into an ISA, understand its allowance, rules and benefits so you can choose the right account for your goals. You can divide your annual allowance across Cash, Stocks & Shares, Innovative Finance and Lifetime ISAs, but total contributions must stay within the overall limit, and unused allowance cannot be carried forward. Income and capital gains from investments held within an ISA are tax-free, and funds can be transferred between ISA types using the appropriate transfer process. A Lifetime ISA requires your first payment to be made aged 18–39 and allows contributions of up to £4,000 annually until age 50, with a 25% government bonus worth up to £1,000 a year. Funds can support an eligible first-home purchase or be accessed tax-free from age 60; account-holder and property conditions apply, and other withdrawals generally incur a charge. Help to Buy ISAs support eligible first-time buyers with a £50 government bonus for every £200 saved, up to £3,000 on £12,000 of savings, claimed towards a qualifying home purchase through the scheme’s conveyancing process. Although closed to new savers on 30 November 2019, existing holders can contribute up to £200 monthly until 30 November 2029 and claim the bonus by 1 December 2030, subject to account-holder, property and scheme conditions.
Who Can Use ISA Allowances?
Most people who live in the UK for tax purposes can use their ISA allowance to save or invest tax-free.
Age Rules
You must be aged 18 or over to open and pay into a Cash ISA, subject to the applicable account eligibility rules.
You must be aged 18 or over for Stocks & Shares or Innovative Finance ISAs, and 18–39 when first funding Lifetime ISAs.
A parent or guardian can open a Junior ISA for a child under 18, with an allowance separate from the adult limit.
Residency Rules
UK Residency Base
You must be a UK resident for tax purposes to pay into an Individual Savings Account.
Moving Abroad Rule
If you move abroad, you keep existing ISAs open but cannot pay in while non-resident.
Crown Staff Exempt
Crown employees abroad and partners are treated as UK residents for ISA purposes now!
Other Rules to Note
Multiple ISA Options
You can split your ISA allowance or pay into multiple ISAs within annual limits.
Lifetime ISA Limit!
However, you can only contribute into one Lifetime ISA during a single tax year.
Tax Savings Planning
Knowing ISA rules helps you plan tax-free savings without exceeding HMRC limits.
How to Use Your ISA Allowance
Using your ISA allowance wisely means getting the most from your tax-free savings each tax year. You can put all of your allowance into one type of ISA or split it between different types, for example a Cash ISA for savings and a Stocks & Shares ISA for investing.
To use your ISA allowance:
Open an ISA with a bank, building society or investment provider that is approved by HMRC.
Decide how much to pay in, up to the annual You can make one lump sum deposit or spread your payments across the year.
Keep track of contributions so you do not go over your Any amount above the limit will not qualify for tax-free status.
Review your ISA each year to make sure it still suits your savings goals and risk.
Remember that You cannot carry any unused ISA allowance forward. For the 2026/27 tax year, the tax year runs from 6 April 2026 to 5 April 2027. Any unused annual ISA allowance cannot be carried forward to the following tax year.