Both are FCA-regulated and FSCS-protected. The real difference is fees, account types and how each platform feels to use. Verified against each provider’s published charges.
Fees verified July 2026. Capital at risk. Information, not financial advice.
Fund investors who value guidance, tools and phone support.
Beginners building a habit, and first-time buyers using the Lifetime ISA.
Tick what you need. No account, no email. The answer is on this page.
Tick what you need above and we'll tell you which of the two covers it.
Account availability verified July 2026. Capital at risk. Information, not financial advice.
Reviewers highlight helpful phone support and a straightforward transfer process.
The £7.50 share dealing charge and dated parts of the website draw criticism.
Read Fidelity reviews on TrustpilotUsers love the round-ups, the goal-based design and how painless it makes starting. 93% of customers surveyed in 2026 would recommend it.
The £1 monthly subscription on top of the platform fee is often flagged as expensive for balances under £5,000.
Read Moneybox reviews on Trustpilot| Fee | Fidelity | Moneybox |
|---|---|---|
| Platform fee | 0.35% from £25k to £250k; 0.20% from £250k to £1m; nothing above £1m; £90 a year flat under £25k without a regular savings plan | £1/month subscription (waived at £5,000+) plus 0.15% to 0.45% platform fee |
| Share dealing | £7.50 per online trade | US stocks available, 0.45% FX fee |
| Fund dealing | Free | Free (fund fees apply) |
| FX fee | 0.75% tiered | 0.45% on US stocks |
| Stocks & Shares ISA | Platform fee applies | Subscription plus 0.15% on Moneybox funds or 0.45% on other funds |
| SIPP | Platform fee applies | 0.45% on the first £100k then 0.15% (other funds); 0.15% capped at £150 a year (Moneybox funds); no subscription |
| Withdrawals | Free | Free |
| Minimum to start | £25/month or £1,000 lump sum | £1 |
A 0.25% yearly fee gap sounds small. On £50,000 over 20 years it is about £5,900 (illustrative). Add your ISA and pension balances to Delphina yourself and see what your charges cost by retirement and whether you're on track.
See what my fees costIllustrative: £50,000, 5% a year growth before charges, 0.25% vs 0.50% a year in charges, no further contributions. Not a recommendation of Fidelity or Moneybox. Delphina is guidance, not financial advice.
Fidelity is a solid full-service choice for fund investors. Fund dealing is free, the ETF and share service fee is capped at £90 a year, and the guidance content is some of the best of the big platforms.
Costs are less friendly if you trade shares often or hold a small account without a regular savings plan. Compare it against AJ Bell if you want similar breadth with lower dealing charges.
Moneybox is designed for getting started. Round-ups, weekly deposits and simple starter portfolios remove the friction that stops most people investing, and its Lifetime ISA is one of the most popular routes to a first home deposit.
The convenience has a cost on small balances: £1 a month plus up to 0.45% is one of the higher fee stacks here below £5,000 in non-Moneybox funds. The subscription drops away at £5,000, and Moneybox's own funds carry 0.15% rather than 0.45%, so the total depends on your pot size and fund choice.
It depends on what you hold and how often you trade. Fidelity's platform fee is 0.35% from £25k to £250k; 0.20% from £250k to £1m; nothing above £1m; £90 a year flat under £25k without a regular savings plan, against £1/month subscription (waived at £5,000+) plus 0.15% to 0.45% platform fee at Moneybox. On dealing, Fidelity charges £7.50 per online trade for shares and free for funds, while Moneybox charges US stocks available, 0.45% FX fee for shares and free (fund fees apply) for funds. Fees verified July 2026.
Fidelity is best for fund investors who value guidance, tools and phone support. Moneybox is best for beginners building a habit, and first-time buyers using the Lifetime ISA. Both are FCA regulated and covered by the FSCS.
On Fidelity's ISA: Platform fee applies. On Moneybox's ISA: Subscription plus 0.15% on Moneybox funds or 0.45% on other funds. Neither offers a flexible ISA, so anything you withdraw still counts against your annual allowance. Minimums are £25/month or £1,000 lump sum at Fidelity and £1 at Moneybox.
Fidelity offers a SIPP (platform fee applies). Moneybox does not offer a SIPP.
Fidelity scores 4.6 out of 5 on Trustpilot (Excellent) from over 6,500 reviews. Moneybox scores 4.4 out of 5 (Excellent) from around 4,800 reviews. The £7.50 share dealing charge and dated parts of the website draw criticism. The £1 monthly subscription on top of the platform fee is often flagged as expensive for balances under £5,000.
Yes. UK platforms accept ISA and SIPP transfers in, and you start the transfer with the receiving provider rather than the one you are leaving. Fidelity charges free on withdrawals and Moneybox charges free. Transfer as cash and you are out of the market while it settles; transfer in specie and you keep your holdings but it takes longer.
Fidelity or Moneybox, the account is the easy part. What decides when you can retire is how much goes in and for how long. Delphina works that out from what you already hold and what you pay in each month.
Free to check. No card required. Takes about two minutes.