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What is a Stocks & Shares ISA?

What is a Stocks & Shares ISA?

What Is a Stocks & Shares ISA?

A Stocks & Shares ISA is a tax-efficient “wrapper” that lets you invest in things like funds, ETFs and shares without paying UK tax on the growth or income inside it. It’s not an investment itself – it’s a tax-free container you put investments into, up to an annual limit set by the government.

The idea in one line

Invest inside a Stocks & Shares ISA and you don’t pay UK income tax or capital gains tax on what it earns/grows by.

How does a Stocks & Shares ISA work?
  • You open one with an ISA provider and pay money in, up to the annual allowance set by the government.
  • You choose investments to hold inside it: for example, funds, ETFs or shares — or have them managed for you by a professional investment firm.
  • Growth and income are tax-free. No UK capital gains tax on profits and no further UK income tax on dividends or interest earned inside the ISA.
  • You can withdraw when you wish (subject to your provider’s terms); the value depends on how the investments have performed.
The ISA allowance

Each tax year you can pay in up to the government’s ISA allowance — £20,000 for the 2026/2027 tax year. The allowance covers all your ISAs combined, and it resets each 6 April. Unused allowance doesn’t carry over – use it, or lose it.

Important: ISA changes coming from April 2027

Heads-up: new rules from 6 April 2027. The government has announced ISA reforms. From this date, a 22% charge will apply to the interest earned on cash left uninvested inside a Stocks & Shares ISA – your ISA manager pays it to HMRC, so you don’t need to declare it. It’s designed to discourage holding large cash balances in an investment ISA rather than investing them.

  • It applies to interest on cash, not to the value or growth of your invested holdings.
  • Money market funds held in an ISA aren’t treated as cash for this charge (provided they aren’t your entire ISA).
  • Separately, the Cash ISA allowance falls to £12,000 from April 2027 (the £20,000 Stocks & Shares ISA allowance is unchanged; those aged 65+ keep a £20,000 cash allowance).

Because SCM Direct invests your money in a diversified ETF portfolio rather than leaving it in cash, this charge does not affect the invested holdings. It doesn’t change the core tax benefits of a Stocks & Shares ISA. Tax rules and allowances can change, and how they affect you depends on your circumstances.

(Sources: GOV.UK “ISA reform 2027 — anti-circumvention rules factsheet”; HM Treasury fiscal-event materials.)

Stocks & Shares ISA vs Cash ISA

A Cash ISA protects your capital but tends to only grow slowly.  A Stocks & Shares ISA aims for more growth over time, with the risk that values can fall. Many people use both for different goals.

Stocks & Shares ISA Cash ISA
What’s inside Investments (funds, ETFs, shares) Savings (interest)
Potential return Higher over the long term (not guaranteed) Lower, more predictable
Risk to capital Yes — value can fall No (cash)
Best suited to Money invested for the longer term (5+ years) Shorter-term savings
Who is a Stocks & Shares ISA for?

It generally suits people investing for the medium- to long-term who are comfortable with values rising and falling along the way. If you might need the money within a year or two, cash may be more appropriate. If you’re unsure, consider regulated advice.

How SCM Direct’s ISA works

SCM Direct offers a Stocks & Shares ISA invested in a discretionary, ETF-based portfolio matched to your risk profile, at a typical 0.85% Total Annual Cost, with a £10,000 minimum, and the option to add £200+ per month.

You complete a short risk questionnaire, choose a portfolio, and SCM manages the investments for you.

Capital at risk. Unlike a Cash ISA, the value of a Stocks & Shares ISA can go down as well as up, and you may get back less than you invest. Tax treatment depends on your circumstances and may change.

Frequently asked questions
Is a Stocks & Shares ISA tax-free?

You pay no UK capital gains tax on profits and no further UK income tax on income earned inside the ISA. Tax treatment depends on your circumstances and may change.

Up to the annual ISA allowance — £20,000 for 2026/2027 — across all your ISAs combined.

Yes. Unlike a Cash ISA, the investments can fall in value, so you could get back less than you put in.

Yes – you can pay into different types of ISA in the same tax year, as long as your total stays within the allowances.

Yes. You can transfer an ISA from another provider without losing its tax-free status. (How to transfer an ISA to SCM Direct)

Investments such as funds, ETFs and shares. SCM Direct holds diversified, ETF-based portfolios.