Save a little greener

From instant access accounts to tax-free ISAs, grow your savings while supporting more sustainable choices.

Cash ISAs | Up to 
4.00
% AER tax-free
Savings Accounts | Up to 
3.80
% AER
Guaranteed return
Tax-free
Fixed Rate Cash ISA
Savings pots
Instant Access Saver
Moneyfacts
Best App-Only
Savings Provider
2025
Moneyfacts
Voted Best
Customer Service
2025
Account Types

Choose the way you save

Four savings accounts. One app. Open in minutes.
Quicker than making a brew.

Instant Access Cash ISA
Variable rate
4.00
% AER
with Top Up
Best for tax-free savings you can dip into anytime.
Monthly interest
24/7 access to your funds
Includes Top Up rate
Fixed Rate Cash ISA
Fixed rate
Up to 
4.00
% AER
Best for tax-free savings you don't need to touch
Fixed monthly interest
Guaranteed return over time
Early withdrawal penalty applies
Instant Access Saver
Variable rate
3.65
% AER
with Top Up
Best for easy-access savings once your ISA allowance is used.
24/7 access to your funds
Unlimited withdrawals and deposits
Variable interest rate
Fixed Term Saver
Fixed rate
Up to 
3.80
% AER
Best when your ISA’s maxed and you’re saving for something bigger.
No withdrawals during the term
14 days to fund your account
Guaranteed return over time
Compare Accounts

Not sure which one's for you?

Here’s a quick side-by-side. No faff. Just the facts.

Account type
Interest rate
Tax-free
Withdrawals
Top-up rate
4.00
% AER Variable
Yes
Unlimited
Yes
Up to 
4.00
% AER
Yes
Early withdrawal penalty applies
No
3.65
% AER Variable
No
Unlimited
Yes
Up to 
3.80
% AER
No
No
No
Top-up rate:
An additional interest percentage we include for 12 months to give your return a short-term boost. After 12 months, your rate returns to the normal base rate.

Helpful tip!

AER stands for Annual Equivalent Rate and illustrates what the interest rate would be if interest was paid and compounded each year. This allows you to compare what return you can expect from your savings over time. Tax-free means interest is exempt from UK Income Tax under current HMRC ISA rules. Tax treatment depends on individual circumstances and may change in the future.

Saving for something big? We're here for it.

Benefits

Why save with Tandem?

With app-based savings, the benefits are endless. But here’s our shortlist.

Open in minutes

It all happens in the app.

Rewarding rates

Fixed or flexible, you choose.

Fast transfers

Move money quickly and securely.

Fully digital

No branches, no unnecessary paperwork.

FSCS protected

Up to £120,000 covered.

UK support team

Real people, ready to help.

38%

Of our lending in 2024 went to greener upgrades. Your savings help make that possible.

Your car's C02 emissions
50
g/km
Low

I’d been looking for an ethical bank with good interest rates for years!

— Bridget, Tandem Customer

You're in safe hands

We’re a fully regulated UK bank so you can rest easy knowing that your money is protected, up to £120,000 by the Financial Services Compensation Scheme (FSCS), the UK’s deposit guarantee scheme.

AWards and Reviews

That's enough from us, hear it from those who matter

See what others have to say
Join 150,000+ on the app
Moneyfacts
Best App-Only
Savings Provider
2025
Best app-based savings provider
FAQs

Got a question?

We’ve got answers! Explore our most common savings questions, or head to our full FAQ page to find more.

How do I remove a block that I have placed on my savings account?

Please contact us on 02039378730 between 9am and 5pm Monday to Friday to discuss the next steps to unblock the account.

How can I stop payments in and out of my savings accounts if I suspect my details have been compromised or if I have lost my phone?

A block can be placed on your account to stop funds from being transferred out. To place a block on your account, please call our dedicated support line on 02039378730.  

How do I know I'm depositing into the right account?

When you set up your Tandem account as a payee in your current account's banking app, we use the Confirmation of Payee (CoP) scheme. This verifies the account holder details to ensure your deposit goes to your Tandem savings account.

How can I close my Tandem savings account?

You can easily close your Tandem savings account by contacting our savings support team at 0203 370 0970. They will guide you through the necessary steps to close your account hassle-free.

Does applying for a savings account affect my credit score?

No, as we only carry out a soft check when you open a savings account with us, this does not impact your credit score.

Am I eligible to open a savings account with Tandem?

To open an account, you must:

  • Be at least 18 years’ old
  • A UK resident (including for tax purposes)
  • Have a current address in the UK
  • Hold a UK-based current account in your name
Will I receive a Certificate of Interest? When will that be issued, and what’s included on the certificate?

We send you a certificate of interest annually, shortly after the closure of the tax year. The document confirms the interest you’ve earned within the previous tax year.

Certificates of interest will be available in the Profile section inside the app, under important documents then savings certificates.

You can also request a copy of your certificate of interest for the previous tax year at any time – to do so, feel free to use our in-app chat or call 0203 370 0970, and we’d be happy to help.

How can I access my savings statements within the app, and how often are they issued?

Tap the Profile icon located at the bottom right corner to access your profile details, then select ‘Important documents’. You’ll then find your ‘Savings statements’. For an Instant Access Saver, these statements are issued monthly and for a Fixed Saver, they are provided annually and at the end of the term. From the Profile screen, you can also manage your personal details, connected accounts, view app information, and find our contact details.

Can I connect a joint current account?

Yes, you can connect a joint current account. If your provider is listed within Open Banking, you can connect this way. Alternatively, you can contact our helpful Customer Support team who can add this for you.

What should I do if my external bank account fails to connect in the app?

If your bank account fails to connect to the app,this could be due to a service or technical difficulty. We recommend that you retry this action after a few minutes.

If you’re still experiencing issues, then contact our customer service team in our in-app chat, at hello@tandem.co.uk or by calling 020 3370 0970.

Why do I have to connect an external bank account?

By connecting your bank account, we have verified that the account belongs to you and provides fraud protection for both Tandem and you.

How long will it take for a bank transfer to show in my savings account in the Tandem app?

In most cases, your money will be in your account within 2 hours, however, sometimes this may take up to 24 hours to arrive and show in your account.

For payments to your external bank account, the same time frames apply.

Does Tandem offer joint savings accounts?

No, at the moment Tandem savings accounts can only be opened in a sole name.

How old do I have to be to have a savings account with Tandem?

To open a savings account with Tandem, you must be at least 18 years of age.

Bereavement – What support does Tandem offer if someone passes away?

We understand that dealing with the passing of a loved one is challenging, and we're here to assist you in managing their financial matters.


What’s Covered - Tandem Savings Customers only

Products - Sole & Joint accounts
Instant Access Savings Account (IASA)
Fixed Term Saver (FTS)

Ways to Notify Us
If you have been appointed as an executor by the person who has died, please let us know as soon as possible, you can do this by using any of the useful contacts listed below.

Useful Contacts
Customer Service team 020 3370 0970
Email customercare@tandem.co.uk
In-app chat – If you are also a customer.

Or post to the address below:
Tandem Money
PO Box 345
Abbey View
Wymondham
NR18 8HW

To help us find their account, we will ask you to provide the following information:

  • The account holder's full name
  • Their phone number
  • The account number(s)
  • Their address

Once the account is identified, we will require proof of death before we can provide any account information. Please provide us with a certified Death Certificate. Upon receipt we can independently verify this information and will follow up with written confirmation by letter.  We also require documents proving the identity and address of all named Executors.

We accept most formal records and have also provided a helpful list below. Please do reach out to confirm with us if you are unsure.

Documents Required
To close the account, we will require certain documents. It is important to note Death Certificates, Grants of Probate, proof of identity or address verification sent to this address will need to be certified as true copies of the originals and sent as scans. We are unable to accept copies that have not been certified. A list of places or persons who may certify your documents is provided below.

  • Original or certified copy of the death certificate
  • An original or certified copy of the Grant of Probate or Letters of Administration
  • Original or certified proofs of identity for all named Executors (e.g., current valid (signed) full passport or UK / EU photocard driving licence)
  • Original or certified proof of address for all named Executors (e.g., utility bill, council tax bill or bank statement dated within the last 3 months) – for individuals who reside outside of the UK, two separate proofs of the address
  • A letter signed by all named Executors providing account instruction

We will accept certification from the following persons:

  • Bank / Building Society Official (Requires official bank stamp with sort-code)
  • Post Office Official (Person authorised under the Post Office Document Certification Service)
  • Legal professional (A Judge, Solicitor, Lawyer, or Barrister registered in England & Wales, Northern Ireland, or Scotland)
  • Qualified Accountant (Registered with qualifications - ICAEW, ICAS, ACCA, CIPFA or CIMA)
  • Medical professional (Doctor registered with the General Medical Council, Dentist registered with Register of General Dental Professionals)
  • Member of Parliament

We cannot accept certification by a close family member or acquaintance (e.g., cohabitant).

We hope you find the enclosed information useful, and if you have any questions, please don't hesitate to get in touch with our customer care team at customercare@tandem.co.uk.

Closing the account
Please note that we are unable to make a payment via cheque and will need to make all payments via an electronic bank transfer. Please provide us with details of where the deceased customer’s funds should be sent upon release. You can do this by providing evidence of the account in the form of a bank statement or voided cheque dated within the last 3 months.

Communications
We will stop any further communications to the account holder, which will take a short while to organise so you might receive letters addressed to them in the meantime. We are sorry if this causes any distress.

Finally, we are deeply sorry for your loss. Our team will complete your request within 7-10 working days once all required communications and documents are received.

How does Tandem ensure my money is safe?

The savings you have with us are protected up to £120,000 by the Financial Services Compensation Scheme (“FSCS”), the UK’s Deposit Guarantee Scheme. So in the unlikely event of Tandem facing difficulties, the FSCS will compensate you if we are unable to pay back your money and as a minimum you would get your money back up to that limit. You can find out more about how the Deposit Guarantee Scheme works and how much of your savings are protected in the FSCS information sheet available in the Tandem app or by visiting fscs.org.uk

Ready to make your money do more?

Download the Tandem app
Open an account
Start growing your money

Can't find what you're after?

Check out our FAQs for answers to your burning questions, or give our friendly support teams a shout.

Get the app

Available on both the App Store and Google Play.
Open an account and start saving in seconds.

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