Verdict at a glance
Pick Transact if
Pick Transact if you're the client of a financial adviser and want ISAs, pensions and bonds on one platform with charges you can actually look up.
How we compared: published fees, account types and review scores for each, verified against the provider’s own price pages.
The short version
Transact has scale, breadth of assets and a long track record; Parmenion is stronger on discretionary model portfolios and service ratings. Both are adviser-only, so a private investor cannot use either directly.
Why people compare them
Two UK adviser platforms compared on charging structure and service quality.
Price and fit, side by side
| Feature | Transact | Parmenion |
|---|---|---|
| Cheapest paid plan | Transact0.26% per aum | Parmenion0.30% per aum |
| Free tier | TransactNo | ParmenionNo |
| Billed in pounds | TransactYes | ParmenionYes |
| Best for | TransactClients of a financial adviser who want their ISAs, pensions and bonds held on one platform with charges they can actually look up | ParmenionAdvice firms that want platform custody and a managed investment solution from the same supplier, and their clients |
Where Transact wins
- The full charge schedule is published openly: annual platform charge tiers, quarterly wrapper fees and dealing charges are all there to read without contacting anyone
- 100% of cash interest is paid to clients, which Transact states came to £210m in 2025. Many platforms retain part of that interest
- Family linking lets related accounts be combined for charging, and the wrapper fee is waived for linked family members under 18
Where Parmenion wins
- Custody, investment solution and dealing charges are all published on Parmenion's own client-facing site, which is more openness than several competitors offer
- The in-house discretionary solutions are cheap by managed-portfolio standards: 0.12% for passive and 0.24% for active
- Custody tapers from 0.30% to 0.15% as holdings grow, and no custody charge is applied to the cash held for trading and charge payments
Decided? Here’s the next question.
The verdict on the platform is one question. Whether you’re actually saving enough is another, and Delphina answers it from what you already hold and what you pay in each month.
Free. No card required. About two minutes.
Transact vs Parmenion: common questions
Transact is 0.26% per aum and Parmenion is 0.30% per aum. Compare the billing period before the number: an annual price and a monthly price are not the same thing.
You can, and some people do, because they solve different halves of the problem. It does mean paying for both, so add the two annual figures together before deciding.
Judge it on billing currency, Open Banking coverage and whether ISAs and pensions are handled. Check each one against those three points, because a tool that scores well elsewhere can still be a poor fit in the UK.
Transact suits clients of a financial adviser who want their isas, pensions and bonds held on one platform with charges they can actually look up. Parmenion suits advice firms that want platform custody and a managed investment solution from the same supplier, and their clients. The one that matches how you already think about money will take less setting up.