myoplo.co.uk

What It Is

Tandem Bank is a UK digital bank built around a “greener future” proposition. Unlike traditional banks, Tandem uses customer deposits to support green lending projects—such as financing for low-emission vehicles, home solar panels, and energy-efficiency upgrades—creating a closed loop where funds are directed toward environmentally focused use cases.

Core Criteria Analysis

• Service type: Covers personal savings, including tax-free Cash ISA and standard savings products, as well as lending services such as mortgages, home loans, and car finance.
• Supported payment methods: Deposits and repayments are mainly made via Open Banking transfers from verified UK bank accounts. Direct funding from overseas accounts is not supported.
• Supported countries/regions: UK only, and users must hold a verified UK bank account.
• Compliance and licensing: Fully regulated by the UK Financial Conduct Authority (FCA). Tandem is a licensed UK bank, and deposits are protected by the FSCS up to £120,000.
• Risk control: Uses strict account verification and only accepts funds from verified UK accounts to reduce fraud risk. It also provides dedicated channels for fraud prevention and complaints handling.
• Settlement and arrival time: Fixed-term savings products have a 14-day funding window. Once locked in, funds cannot be withdrawn early. Interest is paid annually and at maturity to the linked account.
• API and integrations: Uses Open Banking integrations for consumer-side fund transfers, but does not mention any open API for merchants or developers.

Pricing

On the savings side, Tandem offers competitive interest rates: the instant-access Cash ISA pays 4.00% AER, while fixed-term Cash ISA and fixed-term savings products offer up to 4.45% AER. Loan rates are not disclosed, but Tandem states that it offers rate discounts for energy-efficient properties rated A–B and for green home improvement projects.

Pros and Cons

Pros: Distinctive green finance positioning; full FSCS protection; relatively high savings rates; named Best App-Only Savings Provider and Best Customer Service in 2025.
Cons: Fixed-term savings have very poor liquidity once locked in, with no early withdrawals; funding sources are restricted to verified UK accounts only; loans must be applied for through partner dealers or brokers; account management is entirely app-based.

Who It’s For

Best suited to UK residents who care about the environmental impact of their money, as well as borrowers looking to buy a home, make energy-efficiency upgrades, or purchase a low-emission vehicle.

Access from China

• Network: Unknown. The source text does not mention this, but as a UK domestic bank, its website may have access limitations from Chinese IP addresses.
• Payments: Chinese bank cards and overseas accounts cannot be used for direct deposits.
• Alternatives: Chinese users cannot use this service. Comparable UK digital bank alternatives include Atom Bank and Starling Bank.