Interest just got ınteresting.

See how much you could earn with our top-tier 4.35% AER / 4.27% Gross (variable) interest rate up to £500,000.
Read our FAQs below for more details on interest rates.

Interest calculator

Calculate what you could earn based on 4.35% AER / 4.27% Gross (variable).


You'll earn:





How is interest calculated on a daily balance of £20,000?
Monthly earnings.

We calculate your interest daily, based on your end-of-day balance. We'll pay the interest to you on the first day of the following month.

This is the calculation we use:

(End-of-day balance x Gross interest rate) ÷ 365 days in the year = Interest earned that day.

The total amount of daily interest earned throughout the month is the interest earned for that month.

Daily calculation

Interest earned

1st day

20,000.00 × 0.0427) ÷ 365


2nd day

20,000.00 × 0.0427) ÷ 365


3rd day

20,000.00 × 0.0427) ÷ 365



Earned that month

Total amount of daily interest throughout a 30-day month


Questions? Answers.

It’s time your money earned its keep.

“If you’re happy to do all your banking via an app on your smartphone, Kroo is my number one choice. Paying an impressive 4.35%, it’s a great option for savers.” - Andrew Hagger, finance expert from Moneycomms

With Kroo, your money works for you.

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