The Trading 212 Cash ISA pays a variable interest rate that tracks the Bank of England base rate minus 0.15%. As of early 2026, the standard rate is around 4.10% AER, with new customer promotional rates pushing above 4.30%. It is a flexible ISA with no fees, FSCS protection up to £120,000, and you can start from just £1. Interest accrues daily and is paid monthly, completely tax-free.
When Trading 212 launched its Cash ISA in 2024, it immediately became one of the most talked-about savings products in the UK. An app-based, flexible Cash ISA with a market-leading interest rate and zero fees from a platform already known for commission-free investing? It sounded almost too good.
I have been using the Trading 212 Cash ISA alongside my Stocks and Shares ISA on the same platform for several months now, and in this review I will cover exactly how it works, what rate you can expect, how safe your money is, and whether it is worth opening one.
If you want a broader look at Trading 212 as a platform, my full Trading 212 review covers the investing side, fees, and features in detail.
What Is the Trading 212 Cash ISA?
A Cash ISA is a tax-free savings account that allows UK residents to save up to £20,000 per tax year without paying any tax on the interest earned. Unlike a Stocks and Shares ISA, there is no investment risk involved. Your money sits in cash and earns interest, similar to a regular savings account, but with the added benefit of being completely tax-free.
The Trading 212 Cash ISA is managed entirely through the Trading 212 app. There are no branches to visit, no paperwork to fill in, and you can open one with as little as £1. It sits alongside the Trading 212 Invest account and Stocks and Shares ISA within the same app, making it easy to move money between savings and investments when you are ready.
If you are not sure which type of ISA suits you, my guide on cash ISA vs stocks and shares ISA explains the differences and when each one makes sense.
Trading 212 Cash ISA Interest Rate
The interest rate on the Trading 212 Cash ISA is variable and directly linked to the Bank of England base rate. Trading 212 sets its rate at 0.15% below the base rate, which they call the "T212 Tracking Rate."
So if the Bank of England base rate is 4.25%, the Trading 212 Cash ISA standard rate would be 4.10% AER. If the base rate drops to 4.00%, the Cash ISA rate adjusts down to 3.85% AER. This happens automatically whenever the Bank of England changes its rate.
As of early 2026, the standard rate sits at around 4.10% AER, which is competitive for a flexible, easy-access Cash ISA. Trading 212 also runs promotional rates for new customers that push the rate even higher, typically adding a bonus of 0.67% to 0.80% for the first 12 months. With a promotional bonus, the rate has reached as high as 4.40% AER, which has placed Trading 212 at or near the top of the best-buy Cash ISA tables.
Interest accrues daily and is paid into your account on the third calendar day of each month. All interest is tax-free within the ISA wrapper, meaning you keep every penny.
How it compares to other Cash ISAs:
| Provider | Rate (AER) | Access | Min Deposit | FSCS Protected |
|---|---|---|---|---|
| Trading 212 (promo) | 4.40% | Easy access, flexible | £1 | Yes (£120,000) |
| Trading 212 (standard) | 4.10% | Easy access, flexible | £1 | Yes (£120,000) |
| Moneybox | 4.39% | Easy access | £500 | Yes |
| Plum | 4.27% | Easy access | £1 | Yes |
| Chip | 4.14% | Easy access | £1 | Yes |
For a full comparison of ISA options including Stocks and Shares ISAs, see my best stocks and shares ISA guide.
Is the Trading 212 Cash ISA Safe?
Yes. Your money in the Trading 212 Cash ISA is protected by the Financial Services Compensation Scheme (FSCS) up to £120,000 per person. This is the same protection you get with any UK bank or building society, and the limit was increased from £85,000 in December 2025.
Unlike the interest paid on uninvested cash in Trading 212's general Invest account (which is held in qualifying money market funds), Cash ISA deposits are held in cash at partner banks. This means the interest is AER (Annual Equivalent Rate), not APY, and your capital is not subject to market risk.
Trading 212 itself is regulated by the Financial Conduct Authority (FCA) with firm reference number 609146. I have covered the safety of the platform in much more detail in my dedicated article on whether Trading 212 is safe.
Key Features of the Trading 212 Cash ISA
Flexible ISA. This is one of the most important features. A flexible ISA means you can withdraw money and redeposit it within the same tax year without it counting twice towards your annual £20,000 ISA allowance. For example, if you deposit £10,000, withdraw £3,000, and then redeposit that £3,000, you have still only used £10,000 of your allowance. Not all Cash ISAs offer this, and it makes a genuine difference if you need access to your savings during the year.
No fees. There are no account fees, no deposit fees, no withdrawal fees, and no management charges. You keep 100% of the interest earned.
£1 minimum deposit. You can open the Cash ISA with just £1, making it accessible to absolutely everyone.
Daily interest accrual, monthly payments. Interest is calculated daily on your balance and paid on the third of each month.
ISA transfers in. You can transfer existing Cash ISAs from other providers into Trading 212. The process is paperless and handled through the app. Note that promotional bonus rates typically only apply to new deposits made in the current tax year, not to transferred balances from previous years.
Transfer between ISA types. You can move money between your Trading 212 Cash ISA and Stocks and Shares ISA within the app. If you decide you want to start investing some of your savings, the transition is seamless. My guide on stocks and shares ISAs explained covers how investment ISAs work if you are considering making that move.
Withdrawals: What You Need to Know
One thing to be aware of is that while the Trading 212 Cash ISA offers flexible, easy access to your money, withdrawals can take up to three business days to process. This is not instant access in the way a current account is, so if you are likely to need money at very short notice, it is worth keeping that in mind.
That said, for the vast majority of savings goals, whether you are building an emergency fund, saving for a house deposit, or just parking cash somewhere tax-free, a three-day withdrawal window is perfectly reasonable.
The ISA Allowance and Upcoming Changes
For the 2025/26 tax year, the annual ISA allowance is £20,000, which can be split across different ISA types (Cash ISA, Stocks and Shares ISA, Lifetime ISA, and Innovative Finance ISA). For a full breakdown of the rules, my ISA allowance 2025/26 guide covers everything.
It is worth noting that from April 2027, the government has proposed changes that would limit Cash ISA contributions to £12,000 per year for under-65s (while the overall £20,000 allowance would remain for over-65s). This has not been finalised yet, but if it goes ahead, it could make maximising your Cash ISA contributions in the 2025/26 and 2026/27 tax years even more important.
Who Is the Trading 212 Cash ISA Best For?
The Trading 212 Cash ISA is ideal for savers who want a tax-free home for their cash with a competitive, market-tracking interest rate and the flexibility to withdraw and redeposit without penalty.
It works particularly well for people who are already using Trading 212 for investing, since you can manage your Cash ISA and Stocks and Shares ISA in the same app and move money between them easily. It is also a great option for anyone who prefers managing their finances digitally rather than through a traditional bank.
It is less ideal for savers who want a fixed interest rate (the rate is variable and will fall if the Bank of England cuts rates), those who need truly instant access to withdrawals, or anyone who prefers face-to-face banking.
If you are deciding between a Cash ISA and investing, my guide on cash vs stocks and shares ISA compares the pros and cons of each approach.
How to Open a Trading 212 Cash ISA
Opening the Cash ISA takes just a few minutes:
Download the Trading 212 app and create an account (or log in if you already have one). Select the Cash ISA option from the account menu. Complete identity verification if you have not already done so. Deposit at least £1 to get started. Your money will immediately begin accruing interest at the current rate.
If you are a new customer, you can use a referral link or promo code to access the boosted promotional interest rate. I cover this in more detail in my Trading 212 promo code guide. Note that the promotional rate only applies to Cash ISA deposits, and the free share offer applies to the Invest or Stocks and Shares ISA accounts.
My Verdict
The Trading 212 Cash ISA is one of the best flexible Cash ISAs available in the UK in 2026. The combination of a market-tracking interest rate, FSCS protection up to £120,000, no fees, flexible withdrawals, and a £1 minimum deposit makes it a genuinely strong product.
The variable rate does mean your returns will fall if the Bank of England cuts rates, and the three-day withdrawal window is not instant. But for tax-free savings with one of the most competitive rates on the market, it is very hard to fault.
If you are looking at the broader Trading 212 platform, including the investing side, my Trading 212 review covers everything. And if you want to compare all the top ISA providers, check out my best stocks and shares ISA roundup.
Frequently Asked Questions
The standard rate tracks the Bank of England base rate minus 0.15%. As of early 2026, this is approximately 4.10% AER. New customers may qualify for a promotional bonus of 0.67% to 0.80% for the first 12 months, pushing the rate above 4.30%.
Yes. Deposits are protected by the Financial Services Compensation Scheme up to £120,000 per person. This limit was increased from £85,000 in December 2025.
Yes. It is a flexible ISA, which means you can withdraw and redeposit money within the same tax year without it counting twice towards your £20,000 annual ISA allowance.
No. There are no account fees, deposit fees, withdrawal fees, or management charges.
Withdrawals can take up to three business days to process.
Yes. Trading 212 supports ISA transfers from other providers. The process is paperless and managed through the app. Note that promotional bonus rates may only apply to new deposits, not transferred balances from previous tax years.
Yes. You can hold both types of ISA with Trading 212 and move money between them within the app, as long as your total contributions across all ISAs do not exceed £20,000 in a tax year. My guide on ISA rules explains how this works.
Your Cash ISA interest rate will decrease automatically in line with the base rate change. Trading 212 does not offer a fixed-rate Cash ISA option.
