Trading 212 Cash ISA Review 2026: Is the Promo Bonus Rate Actually Worth It?

Short answer: yes, if you're a new Trading 212 customer opening the account with current-year money — the bonus genuinely lifts you into best-buy territory for 12 months. It's less compelling once the bonus ends, since the underlying rate then sits below the market leaders.

Trading 212's Cash ISA pairs a variable base rate — currently 3.60% AER, tracking 0.15 percentage points below the Bank of England base rate — with a temporary bonus of just under one percentage point for new customers. Combined, that pushed the new-customer rate to around 4.53% AER as of late March 2026, one of the higher easy-access cash ISA rates on the market. This review is based on Trading 212's own help centre and terms pages, plus independent rate comparisons, as of 12 August 2026. We have not personally opened or used the account.

Some links in this article are affiliate links. If you sign up through them we may earn a commission — at no extra cost to you. It never changes which products we recommend.

TL;DR

• Trading 212's standard Cash ISA rate is 3.60% AER variable (Bank of England base rate of 3.75%, minus a 0.15-point margin), with a promo bonus of roughly 0.9–1 percentage point for 12 months for eligible new customers.
• The bonus applies only to current tax year money — deposits or ISA transfers reported as this year's contributions. Prior-year transfers-in earn the standard rate only.
• Cash sits with FCA-regulated partner banks (including Barclays, NatWest and J.P. Morgan Chase), covered by the FSCS up to £120,000 per person, per bank — up from £85,000 since 1 December 2025.
• Support is online-only: no phone line, just in-app chat and a help centre ticket system.

How the Trading 212 Cash ISA rate actually works

An ISA (individual savings account) is a wrapper that lets you earn interest tax-free, up to your annual allowance. AER stands for Annual Equivalent Rate — it shows what you'd earn over a year if the rate stayed the same and interest compounded, so it's the number to compare across providers.

Trading 212's rate has two parts.

1. The standard rate. This tracks the Bank of England base rate, currently held at 3.75% after five consecutive holds through to 30 July 2026. Trading 212 sets its own rate 0.15 percentage points below that — what it calls the "T212 Tracking Rate" — giving a standard AER of 3.60%. If the Bank of England moves the base rate, your Cash ISA rate changes immediately. If Trading 212 changes its own margin (currently -0.15%), it gives 14 days' notice.

2. The promotional bonus. New customers who open a Cash ISA via a promotional link or code, are UK residents, have no existing or previous Trading 212 account, and make a first deposit within 10 days of opening (during the current tax year) can earn a fixed bonus on top of the standard rate for 12 months. As of late March 2026, one widely advertised bonus was 0.93 percentage points, giving a combined rate of around 4.53% AER — though the exact bonus varies by which partner link or code you use, and it changes over time, so check the live rate before applying.

Interest accrues daily and is paid monthly, on the third calendar day of each month, directly into the Cash ISA. There are no account fees, deposit fees or withdrawal fees.

Who this account suits

The bonus period is the whole appeal here, so this account works best for:

• People opening their first Trading 212 account this tax year with money they haven't already put into an ISA elsewhere.
• Savers comfortable managing money through an app, with no need for phone support or a branch.
• Anyone who wants a flexible ISA — you can withdraw and pay money back in within the same tax year without it counting twice against your £20,000 annual allowance.

It suits people building or topping up an emergency fund or short-term savings pot, not those chasing the single highest fixed rate over several years — for that, a fixed-rate cash ISA locks in a rate but sacrifices access. For a wider view of what's currently paying the most across providers, our best cash ISA rates roundup is updated regularly.

Is the Trading 212 Cash ISA safe? FSCS protection explained

Trading 212 doesn't hold your Cash ISA cash itself. It places it with FCA-regulated partner banks, which per Trading 212's own protection page include Barclays, NatWest and J.P. Morgan Chase (other sources also cite BNY Mellon and Lloyds among the partner banks used). You can see exactly how your cash is split across these banks in the app's "Interest on cash" section.

Each of these banks is covered by the FSCS (Financial Services Compensation Scheme) — the UK's deposit protection scheme, which pays out if a bank fails. Since 1 December 2025, the protection limit is £120,000 per eligible person, per banking group (up from £85,000 previously), confirmed directly by the FSCS. That limit applies to everything you hold with a given banking group, including money outside Trading 212 held at the same bank — not per account or per product.

If you're depositing amounts anywhere near £120,000 into a single ISA, it's worth checking in the app how your cash is currently spread across partner banks, since being split across genuinely separate banking groups is what gives you protection beyond a single £120,000 limit.

The downsides — read this before you sign up

Every upside here comes with a catch, and a fair review has to say so plainly.

• The bonus is temporary, and it's fixed at whatever rate applied when you opened the account. After 12 months it drops away and you're back to the standard tracking rate — currently 3.60% AER, which by August 2026 was no longer near the top of the easy-access ISA market.
• The bonus doesn't automatically apply to transferred-in money from previous tax years. If you transfer an ISA balance from another provider, the bonus rate only applies to the portion your old ISA manager reports as a current tax year contribution. Older, previous-year money transferred in earns the standard rate only — a detail that catches people out.
• The variable rate can fall. Because the standard rate tracks the Bank of England base rate minus a margin, if the Bank of England cuts rates, your return falls in step — there's no guaranteed floor.
• Support is online-only. There's no phone line. You contact Trading 212 through in-app chat or a help centre ticket form. That's fine for most queries but can feel slow if something urgent comes up with a large sum of money.
• Withdrawals aren't instant. Trading 212 and independent reviewers both note withdrawals can take up to three business days to reach your bank account, so this isn't a same-day access account despite being labelled "easy access."

How Trading 212 compares to other easy-access cash ISAs

Rates below are based on independent rate-comparison roundups from August 2026 and change frequently — always check the provider's site for the live figure before applying.

Trading 212 comes out near the top of this group for new money, largely thanks to the bonus. Chip and Plum are close competitors on headline rate but have their own quirks — Chip doesn't accept ISA transfers and pays interest annually rather than monthly, while Plum's rate drops considerably after year one. If you're weighing Trading 212 against other investing-app-linked cash options rather than pure savings apps, our Trading 212 vs Lightyear comparison covers how the two platforms differ more broadly, including their cash and stocks and shares ISA products.

Who should pick what

• New to ISAs, want the highest headline rate for a year: Trading 212's promo rate is competitive right now, provided you qualify as a genuinely new customer.
• Already hold cash with Trading 212 or don't qualify for the bonus: the standard 3.60% AER is unremarkable next to the top of the market — shop around using our best cash ISA rates page instead.
• Want to top up an existing ISA from previous tax years via transfer: be aware the bonus won't apply to that portion, so compare the standard rate, not the headline promo rate, before transferring.
• Sitting on uninvested cash inside a stocks and shares ISA: it's worth understanding the tax treatment before moving it — see our guide on holding cash in a stocks and shares ISA.
• Saving for the long term and want simplicity: remember the overall ISA allowance is £20,000 for 2026/27, and from April 2027 the cash ISA portion of that allowance is due to fall for under-65s — see our explainer on the 2027 cash ISA allowance cut for what that means for your planning.

How to get started with a Trading 212 Cash ISA

1. Check you're eligible for the current bonus — UK resident, aged 18+, and no existing or previous Trading 212 account, since the bonus is for genuinely new customers only.
2. Download the Trading 212 app or head to Trading 212's website and open an account via a current promotional link to make sure the bonus rate applies from day one.
3. Select "Cash ISA" when setting up your account and complete identity verification (you'll need standard ID and National Insurance details).
4. Make your first deposit within 10 days of opening the account — the minimum is £1 — and make sure it lands within the current tax year to qualify for the bonus.
5. If you're transferring in from another ISA provider, use Trading 212's transfer process rather than withdrawing and re-depositing yourself, and check with your old provider how they'll report the amount to keep any current-year portion eligible for the bonus.
6. Check the "Interest on Cash" tab in the app periodically to confirm your current rate and see how your balance is spread across partner banks.

FAQ

Is the Trading 212 Cash ISA rate fixed or variable? It's variable. The standard rate tracks the Bank of England base rate minus Trading 212's margin (currently 0.15 percentage points), so it moves when the Bank of England changes rates. The promotional bonus on top is fixed for its stated period, typically 12 months, but the base it's added to can still move.

Does the bonus rate apply to money I transfer in from another ISA? Only the portion your previous ISA manager reports as a current tax year contribution. Money transferred in from previous tax years earns the standard rate, not the bonus rate — check with your old provider how the transfer will be reported.

Is my money definitely safe with Trading 212? Cash held in the Trading 212 Cash ISA sits with FCA-regulated partner banks and is covered by the FSCS up to £120,000 per person, per banking group, as of 1 December 2025. That's the same protection you'd get holding cash directly with any covered UK bank or building society.

Can I call Trading 212 if something goes wrong? No. Trading 212 doesn't offer phone support. You contact the company through in-app live chat or by submitting a request through its help centre.

How quickly can I withdraw my money? Trading 212 and independent reviewers report withdrawals can take up to three business days to reach your bank account, so it isn't instant despite being an easy-access account.

What happens to my rate after the 12-month bonus ends? It reverts to Trading 212's standard tracking rate — 3.60% AER as of mid-2026 — until you either qualify for a new promotion (unlikely as an existing customer) or move your money elsewhere.

This is general information, not financial advice. Rates and rules are current as of 12 August 2026 and can change — always check the provider's website before you act. Do your own research and consider speaking to a qualified adviser about your situation.

Last updated: 12 August 2026