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We compare investment platforms and savings accounts from multiple providers. Capital at risk. The information shown is accurate at time of display but may change.
Investing Platform Fee Calculator & Comparison
Compare platform fees across ISA, GIA and SIPP providers based on your portfolio size and investment type. This tool shows platform costs only and is for educational purposes — it is not personal financial advice.
Data updated:
ISA Platform Comparison
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When I started investing, I followed the standard advice from r/UKPersonalFinance – invest in a tax-efficient ISA first. But when I looked at platforms with my £1,000 to start and £100 monthly budget, while they all published their fee structures, working out what I'd actually pay was a bit of a task. Some had percentage fees, others charged fixed amounts, and many had complex tier systems that required spreadsheets to compare properly.
I love digging into data and building tools to solve problems, so I created this calculator. It defaults to the amounts I started with (and I'm honestly not much beyond that even now beyond a few years regular contributions to a few different ISAs), and does all the maths for you – showing exactly what you'd pay based on your portfolio size and investing habits, not vague marketing claims.
How This Tool Works
Fee Calculation Method
Fee calculations are based on the exact portfolio values and monthly contributions you enter, with no growth assumptions applied. Platform fees are calculated on your current portfolio value only and are not applied to monthly contributions throughout the year. This conservative approach may underestimate total platform fees, as most providers charge platform fees on all holdings including new contributions added during the year. I will update the tool to calculate those additional fees soon.
What's Included
Calculations include platform administration fees and trading fees only. Monthly contributions are used solely to calculate annual trading costs (12 × monthly contribution × trading fee per transaction). Regular investing discounts are applied where specifically offered by platforms for your selected investment type.
What's Not Included
Fund management charges (OCF/TER), fund dealing charges, currency conversion fees, and exit fees are not included in these calculations. Some platform-specific discounts (such as loyalty bonuses, account bundles, or discounts for holding specific funds) may not be reflected in the results.
Limitations
Platform fee structures are interpreted from provider documentation and complex tiered structures may have minor calculation variances. Trading fees assume standard retail pricing – regular investing plans may have different fee structures. Not all UK ISA providers are included in this comparison. Results show estimated annual costs based on current fee structures, which may change without notice.
Important Information
This is a fee comparison tool, not investment advice. Always verify current fees, terms, and conditions directly with providers before opening an account. The value of investments can go down as well as up, and you may get back less than you invest. ISA rules and annual allowances may change.
Data Accuracy
Fee information is based on providers' published rates and is updated regularly. Platform features, investment options, and account terms may vary between providers. Check provider websites for complete details before making investment decisions.
Capital at risk.
