Summary
What it is: an additional 0.77% AER variable Sidekick Bonus paid on new deposits to your Cash ISA, on top of the variable Partner Bank rate.
Who it is for: new and existing customers who open a Cash ISA through Sidekick and make a new subscription of at least £1,000 during the Promotion Period.
How long it lasts: 6 months from the Qualifying Date.
How it is applied: by paying an additional amount into your Wallet each month, on top of the interest paid within your Cash ISA by the Partner Bank.
Promotion Period
This promotion is available from 24th June 2026.
Eligibility
You are eligible for this Bonus Rate if you open a Cash ISA through Sidekick and make a new subscription of at least £1,000 during the Promotion Period. Both new and existing customers may apply.
Qualifying Action
You qualify for the Bonus Rate by making a new subscription of at least £1,000 to your Cash ISA during the Promotion Period. A new subscription means a direct cash deposit into your ISA, as distinct from an ISA transfer.
The Qualifying Date is the date of your first new subscription to your Cash ISA.
Bonus Rate
If you qualify, we will pay you an additional 0.77% AER variable on top of the standard variable rate on your Cash ISA. This is on top of, not instead of, the standard rate paid by the Partner Bank.
The Bonus Rate:
accrues daily, calculated as 0.77% per annum on the previous day’s closing balance of new deposits to your Cash ISA;
is paid monthly into your Wallet, rounded up to 2 decimal places; and
applies to new deposits up to a maximum of £20,000. Above this limit, your Cash ISA earns the standard Partner Bank rate only.
The current percentage is variable and can be found on our website and throughout our App.
Bonus Rate Period
The Bonus Rate applies for 6 months starting on the Qualifying Date (the Bonus Rate Period), unless it ends earlier.
Minimum Balance
The Bonus Rate is not conditional on maintaining a minimum ongoing balance. You can make withdrawals from your Cash ISA without losing the bonus.
When It Ends Early
The Bonus Rate ends early if:
you close your Cash ISA; or
we withdraw or withhold the Bonus Rate in line with ‘When we may withhold, withdraw or correct’.
Withdrawal of This Promotion
We may withdraw this promotion at any time for new customers. If we do, customers whose Bonus Rate Period has already started will continue to receive the Bonus Rate for the full remainder of their 6-month period, unless we are entitled to withhold, withdraw or correct it under the section below.
Limits
The Bonus Rate applies to new deposits only. It does not apply to ISA transfers or deposits made outside the Promotion Period. It can only be earned on one Cash ISA and is not available on additional accounts. If you hold more than one Sidekick account, we may treat them as belonging to the same customer when applying this limit.
FSCS Protection
Your Cash ISA deposits may be held across up to 3 Partner Banks. You may be entitled to FSCS protection of up to £120,000 per eligible depositor per Partner Bank, providing potential protection of up to £360,000 in total. Please see the Bondsmith Terms for more information.
When We May Withhold, Withdraw or Correct
This promotion is intended for customers with a genuine intent to make and hold new deposits in their Cash ISA. We intend to pay the Bonus Rate where you meet the conditions in this Schedule. However, we may withhold, withdraw or correct the Bonus Rate (including reclaiming any overpayment) if we reasonably believe:
you are not eligible;
the qualifying subscription was not made during the applicable period;
there has been an error in calculation or application;
there is actual or suspected misuse, fraud, gaming or attempted circumvention of the spirit of this promotion - this includes, without limitation: creating multiple accounts to obtain multiple rewards; cycling funds through your Cash ISA to exceed the £20,000 deposit limit; or any other behaviour inconsistent with the spirit of this promotion; or
we need to do so to comply with law or regulation, or for operational or risk management reasons.
Tax
The Bonus Rate is paid into your Wallet, outside of your Cash ISA wrapper, and is generally subject to income tax. Because it does not count as savings interest, the personal savings allowance does not apply. We will pay the Bonus Rate without withholding or deduction. You are responsible for calculating and paying any tax you owe.
The interest on your Cash ISA at the standard Partner Bank rate is paid within your ISA wrapper and is therefore tax-free.
You should seek specialist tax advice if you are unsure of your tax position.