Write a review

Go to business site

Cynergy Bank: Cash ISA reviews

Name: Cash ISA
Rating: 4.87 (159 reviews)

View other Cynergy Bank products

4.87

Based on 159 reviews, last reviewed 26th Mar 2026

14700% increase in 5 star reviews

in the past 90 days

200% increase in 1 star reviews

in the past 90 days

93%

2 star

Latest highest rating:

5

Cynergy review Clear website. Decent rates. More content is unessaessary Reviewed on: 26th March 2026

Latest lowest rating:

1

terrible telephone customer service at ISA maturity. terrible telephone customer service at ISA maturity. apparent new online system that was not functional 11 days before maturity. no workaround. had ap... Read more Reviewed on: 23rd March 2026

Read all reviews Write a review

About this product

Cynergy Bank have a range of cash ISAs.

You can choose from fixed rate cash ISAs or easy access cash ISAs. Cynergy Bank cash ISAs can be opened with a minimum of £500. You can open and manage a Cynergy Bank cash ISA online.

Cynergy Bank cash ISA reviews help you find out what it’s really like to be a customer. If you’ve used Cynergy Bank before, you can also leave a review and share your experience.

Review Cynergy Bank: Cash ISA now

Help others make smarter decisions by sharing your own experience.

Write a review

Cynergy Bank Cash ISA reviews (159)

Rates have been good and service has always been ver...

Rates have been good and service has always been very good. Reviewed on: 23rd March 2026

Good interest rates paid and simple to operate on line.

Good interest rates paid and simple to operate on line. Reviewed on: 23rd March 2026

Cynergy Bank tops for a Cash Isa.

Opened a Cash Isa with Cynergy Bank in August 2025 with a great rate. The process was extremely efficient with clear instructions from their informative web site which allows informed decision-making. Communication was excellent at all stages. I honestly would have no hesitation in using Cynergy Bank again when my Cash Isa reaches the end of its term. Reviewed on: 23rd March 2026

What’s not to like?

Simple efficient and secure processes and easy access to information. Reviewed on: 23rd March 2026

Had an issue on renewal 2 years ago and it was sorte...

Had an issue on renewal 2 years ago and it was sorted after a few emails. Reviewed on: 23rd March 2026

fast efficient setup.

fast efficient setup. good communication. Reviewed on: 23rd March 2026

terrible telephone customer service at ISA maturity.

terrible telephone customer service at ISA maturity. apparent new online system that was not functional 11 days before maturity. no workaround. had apparently posted the renewal notice 18 days before maturity, arrived 11 days before maturity date. Multiple telephone security questions (8 in total!) akin to data harvesting. 50 minute call left me in a worse position than when I made the call. I had requested that the call transcript be processed as a complaint but received no confirmation that this was being done. Reviewed on: 23rd March 2026

Excellent interest rates and an easy bank to deal with

I have fixed and easy access cash ISAs with Cynergy and have always found their interest rates among the top paying accounts and their on-line operation easy to access and follow. I am also kept informed should they have an account with a higher interest rate and can easily update to the new account should I wish to do so. As long as they continue the good work, I am very happy to stay with Cynergy. Reviewed on: 23rd March 2026

They are very efficient, easy to communicate with an...

They are very efficient, easy to communicate with and pay a good interest. Reviewed on: 23rd March 2026

ISA information

I have rung Cynergy bank a few times last month regarding my maturing ISA. They were always friendly, knowledgeable and efficient. They answered all my questions so I was able to decide what to do with my money for it to be most effective Reviewed on: 23rd March 2026

Do you have a different Cynergy Bank product?

Share your experiences with products to help others make smarter financial decisions and learn more about different products available. Write a review

Alternative products

Lifetime ISA
from Paragon Bank 5.00 from 1 reviews
Cash ISA
from Meteor 0.00 from 0 reviews
Junior ISA
from The Childrens ISA 0.00 from 0 reviews

Want to see more from Cynergy Bank?

Business Saving
from Cynergy Bank 4.86 from 18 reviews
Personal savings
from Cynergy Bank 4.80 from 167 reviews
Current Account
from Cynergy Bank 4.66 from 13 reviews

View all products

Join Smart Money People

Keep up to date on ratings of your favourite businesses. Find out about our awards and write new reviews with ease

Create an account

News, guides and insight from our team

View resource hub