Tandem Mortgages
Specialist LenderTandem is a green digital bank offering specialist mortgage products focused on energy-efficient homes and green home improvements. They also serve borrowers with adverse credit histories, combining environmental lending with specialist underwriting.
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About Tandem Mortgages
Tandem was founded in 2013 as one of the UK's early challenger banks, initially focused on savings and current accounts. The bank pivoted towards green finance, positioning itself as the UK's green digital bank, and acquired Allium Lending in 2021 to enter the mortgage market. This acquisition brought a specialist mortgage book focused on adverse credit and complex income borrowers.
Tandem's mortgage proposition combines two distinct angles: green home improvement finance and specialist residential lending for borrowers with impaired credit. The bank offers Green Home Improvement loans alongside its mortgage range, enabling homeowners to fund energy-efficient upgrades such as solar panels, heat pumps, and insulation. Tandem's green mortgages may offer preferential rates for properties meeting certain EPC ratings.
The bank is authorised by the PRA and regulated by the FCA. Tandem operates as a broker-only lender for its mortgage products, working through intermediaries to ensure borrowers receive appropriate advice. The bank's underwriting team manually assesses applications, considering each borrower's full circumstances rather than relying solely on automated credit scoring.
Lending Focus
Tandem Mortgages offers mortgage products across 2 categories including Residential, Adverse Credit.
Key Features
- Green mortgage products with preferential rates for energy-efficient homes
- Specialist adverse credit lending with manual underwriting
- Green Home Improvement loans for eco upgrades alongside mortgages
- Considers complex income including self-employed and contractors
- Digital-first application process with dedicated broker portal
Pros & Cons
Pros
- Unique green finance offering with potential rate discounts for high EPC properties
- Flexible adverse credit criteria with manual underwriting on every case
- Part of a regulated bank with PRA and FCA oversight
- Growing product range combining environmental and specialist lending
Cons
- –Broker-only — no direct consumer applications
- –Relatively new to the mortgage market compared to established specialist lenders
- –Limited product range — residential only, no BTL or commercial
Fees & Charges
- Arrangement Fee
- Typically £999 — may vary by product
- Valuation Fee
- Based on property value — usually £200–£1,500
- Early Repayment Charge
- Typically 3–5% during fixed-rate period, reducing annually
- Overpayment Allowance
- Up to 10% per year on most fixed-rate products
Mortgage Rates
Rate data coming soon. View rates on Tandem Mortgages
Application Process
- Processing Time
- 2–4 weeks from application to offer
- Online DIP
- Yes — available online
- Offer Valid For
- 6 months
Lending Criteria
- Maximum LTV
- 85%
Frequently Asked Questions
What is a Tandem green mortgage?
Can I get a Tandem mortgage with bad credit?
Is Tandem a real bank?
How do I apply for a Tandem mortgage?
How to Apply
Broker only. Tandem Mortgages products are available through mortgage brokers. Find a broker with Tandem Mortgages on their panel.
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Important: Your home may be repossessed if you do not keep up repayments on your mortgage. Information on this page is for general guidance only and does not constitute financial advice. Always verify lender details directly and seek independent advice before making financial decisions.