Who built this
Built by Valery Frolov
ISA Fees Calculator is an independent side project by Valery Frolov, a UK-based data architect and engineering leader with professional experience in data engineering, data platforms, and financial-data-style modelling work, but it is not run by an FCA-authorised financial adviser.
The site exists because ISA pricing pages can be surprisingly hard to compare. Percentage platform charges, fixed subscriptions, dealing fees, FX charges, investment-type restrictions, and temporary offers all interact. This calculator turns those public fee schedules into scenario-based estimates so users can spot the cost drivers more quickly.
Contact
Corrections and fee-data updates
If a provider fee, source link, or assumption looks wrong, contact Valery on LinkedIn. Include the provider name, the current pricing source, and the page where the issue appears.
Important limits
Not financial advice
This website is not run by an FCA-authorised financial adviser. It does not provide personal financial advice, investment recommendations, tax advice, or a recommendation to open, transfer, buy, sell, or hold any investment or ISA account.
The results are educational estimates based on example assumptions. A cheaper fee estimate does not mean a provider is the right choice for a particular person. Service quality, investment range, account features, FSCS coverage details, transfer process, tax position, and personal circumstances can matter as much as fees.
Before acting, check the provider's own pricing pages and consider regulated advice if you need a personal recommendation.