Savings rates
Rates reviewed daily · last updated 1 October 2026
Savings rates
All rates AER · Updated October 2026
Rates shown are AER and correct as of October 2026.
Cash ISA
| Account | AER | Access | Transfers in | Min Balance | |
|---|---|---|---|---|---|
| 5 Year Fixed Rate Cash ISA | 5.11% | 5 Years | Accepted | £1 | |
| 3 Year Fixed Rate Cash ISA | 5.04% | 3 Years | Accepted | £1 | |
| 2 Year Fixed Rate Cash ISA | 5.03% | 2 Years | Accepted | £1 | |
| 1 Year Fixed Rate Cash ISA | 4.76% | 1 Year | Accepted | £1 | |
| Instant Access Cash ISA | 4.00% | Instant | Accepted | £1 |
Fixed Rate
| Account | AER | Term | Interest paid | Min Balance | |
|---|---|---|---|---|---|
| 5 Year Fixed Saver | 5.06% | 5 Years | Anniversary | £0 | |
| 2 Year Fixed Saver | 5.00% | 2 Years | Anniversary | £0 | |
| 3 Year Fixed Saver | 5.00% | 3 Years | Anniversary | £0 | |
| 18 Month Fixed Saver | 4.90% | 18 Months | Anniversary | £0 | |
| Fixed Term Saver (1 Year) | 4.76% | 1 Year | Annually/On maturity | £1,000 |
Easy Access
| Account | AER | Access | Interest | Min Balance | |
|---|---|---|---|---|---|
| Instant Access Saver | 3.40% | Instant | Variable | £1 |
Is Tandem Bank FSCS protected?
Yes — FSCS protected up to £120,000
Yes. Tandem Bank savings are FSCS protected up to £120,000 per person, per banking licence, under Tandem Bank Limited.
Banking licence: Tandem Bank Limited
Last checked against the FCA register on 5 October 2026.
See every brand that shares a banking licenceSwitch offers
Who they are
Tandem launched as one of the UK's first digital challenger banks, offering straightforward mortgage and savings products.
In January 2018, Tandem completed its acquisition of Harrods Bank, which was immediately renamed Tandem Bank Limited. That move secured the full banking licence the business needed to take deposits, and it has been building on it ever since. In 2022, Tandem merged with responsible lending specialist Oplo, and the bank as we see it today was born.
The defining thread running through all of this is green finance. Tandem does not invest in fossil fuels or similar industries. Instead, money held in Tandem savings accounts is used to fund its lending products, which include greener home improvement loans for energy-efficient improvements such as solar panels and air source heat pumps.
It is a savings bank with a green lending business attached, not somewhere to run day-to-day money. There is no current account, no debit card and no spending features - the app exists to open savings products and watch them accrue.
Tandem Bank Limited is authorised by the Prudential Regulation Authority and regulated by the Financial Conduct Authority and the Prudential Regulation Authority.
It was awarded "Best Customer Service" and "App-only Savings Provider of the Year" at the MoneyFacts Awards 2025.
Savings accounts
Tandem's range is focused and practical. On the easy access side, there is the Instant Access Saver, currently paying 3.40% AER variable, and an Instant Access Cash ISA at 4.00% AER variable. Both include a bonus element - worth reading the small print on before you open. The Instant Access Saver carries a 0.25% boost for the first 12 months on top of a 3.15% base rate, so set a reminder to review it when that period ends. The ISA rate similarly includes an introductory top-up for the first 12 months, after which it reverts to the standard variable rate.
If you are happy to lock money away, Tandem has a solid fixed-rate lineup. The Fixed Term Saver runs from 1 year at 4.76% AER up to 5 years at 5.06% AER, with an 18-month option at 4.90% AER sitting between them. The fixed Cash ISA range mirrors this structure - 1 year at 4.76%, 2 years at 5.03%, 3 years at 5.04%, and 5 years at 5.11% AER. The 1-year Fixed Term Saver requires a minimum of £1,000; most other accounts open from just £1.
Tandem Bank's eligible deposits are protected by the FSCS up to £120,000 per person, per authorised firm (banking licence).
Is it right for you?
Tandem suits savers who want a clean, app-only experience and are comfortable without a high-street branch or current account to back it up. Across public review platforms, Tandem's savings account draws consistent praise for the speed and simplicity of opening, and the lack of friction around withdrawals - customers frequently note that pulling money out is as quick as putting it in.
The restriction to a single linked UK account draws some complaints, and customer service response times can be inconsistent for more complex issues.
The green angle is a genuine differentiator rather than a marketing badge. If knowing your savings fund solar panels and heat pumps rather than a generic loan book matters to you, Tandem stands apart. If you need a joint account or want to link multiple funding sources, it is worth knowing those are current gaps.
There is no current switch offer from Tandem at this time, so the decision is simply about whether the rates and the ethos work for you.
Rates move regularly - use the live figures on this page to compare what Tandem is offering right now before you decide.
This overview was generated by DepositScout's AI, Penny on 1 October 2026. It may contain inaccuracies — always confirm rates and terms with Tandem Bank directly. Specific rates shown elsewhere on this page are the live source of truth.
