Mettle Business Account: review 2026

What Mettle is and who it suits

Mettle is a free, app-only business current account built by NatWest Group and aimed squarely at sole traders, freelancers and micro-businesses operating in the United Kingdom. The pitch is straightforward: no monthly subscription, a Mastercard debit card, and a suite of built-in bookkeeping tools that would otherwise cost a separate software licence. In our test, the sign-up form itself took only a few minutes and the invoicing features worked exactly as described on first use, though the application still has to clear Mettle's own review step before the account is actually usable.

Yes, a sole trader can hold a Mettle business account, and for most of the sole traders we hear from it is a genuinely good fit: it suits self-employed individuals who invoice clients regularly, need a clean separation between personal and business money, and want basic accounting covered without paying for FreeAgent or QuickBooks separately. If you want to see how it stacks up against other sole trader business accounts, that comparison is worth a look before you commit. Mettle integrates with FreeAgent at no extra cost, which alone can save a sole trader upwards of £150 a year. It also connects to Xero. If you're torn between the two, we put them head to head in Mettle vs Tide.

Limited companies can apply too, not just sole traders. Mettle accepts UK-registered limited companies with up to two persons of significant control, though only one of them can actually log in and manage the account, and the applicant has to be both a director and a PSC. The company also needs to be active on Companies House and can't be a PLC. Mettle is explicitly not suited to businesses that need an overdraft, handle a lot of cash, or require branch access. Firms with complex multi-user requirements, or those that need credit facilities, CHAPS payments or outbound international SWIFT transfers, should look at a different provider from the outset, because Mettle doesn't offer any of those. If an application is declined, Mettle's own onboarding page points rejected applicants toward NatWest and Royal Bank of Scotland business accounts instead, and the in-app chat is the right place to ask for the specific reason and whether a fresh application is worth trying; unresolved disputes can go to the Financial Ombudsman Service.

That short list of exclusions matters more than most of the feature list.

Real costs and any fees worth knowing

The headline is genuinely accurate: the monthly account fee is 0.00 GBP, and Mettle regularly comes up in our own round-up of the best free business bank accounts in the UK. There is an optional paid add-on called Mettle+ at £4 a month, which adds quote-to-invoice conversion and client messaging templates, but it isn't required to use the account for free. UK bank transfers (Faster Payments) are free to send and receive, and the Mastercard debit card and its replacements are issued at no cost unless a card is lost or damaged, which costs £5 (a card reported stolen is replaced free).

Cash is where people most often get Mettle wrong. You can pay cash in through the Post Office, and it does work. Each deposit costs £2.75, charged after the funds are credited to your account, and cash withdrawals on the debit card cost £1 each. Businesses that handle cash daily will still find this adds up quickly, but it's outright wrong to call it a "no cash at all" account, as some reviews still do.

That one correction alone is worth knowing before you rule Mettle out.

Instant bank transfers (Faster Payments) are included and free both ways. Mettle can receive international payments, but the fee depends on the amount: above £10 it's a flat £4 plus 1.5% if the payment needs converting into GBP, and below £10 there's no fixed fee, just the 1.5% conversion charge if currency conversion applies. Mettle doesn't send money abroad at all, so outbound international transfers, CHAPS and SWIFT payments aren't on the feature list. The lack of a credit card or overdraft means the cost of a short cash-flow gap falls entirely on the business owner.

Cards and payment methods

Mettle issues a Mastercard debit card, and there's no credit card option and no virtual card facility. The debit card supports Apple Pay and Google Pay out of the box, so contactless payments on a phone or watch work from day one. 3D Secure is enabled for online card payments, which satisfies most e-commerce checkout flows and reduces dispute risk.

That's worth noting for businesses that run multiple subscriptions or want to ring-fence spend by project or supplier. Competitors such as Allica Bank offer virtual cards as a core feature; Mettle doesn't. If you routinely need to issue a new card number for each vendor, that gap matters. Day-to-day, a card cash withdrawal costs £1 and a replacement card is £5 if lost or damaged, free if reported stolen. Card spending limits follow standard Mastercard business debit parameters. Mettle hasn't published a specific daily limit in its public documentation, but in practice contactless limits follow UK legal maximums and online limits are set conservatively by default, with the ability to adjust in-app. The card works across the Mastercard network globally wherever business debit is accepted.

Opening the account: what to expect step by step

Mettle is available only through its iOS or Android app. There is no web-based application. Eligibility covers sole traders and UK-registered limited companies with up to two persons of significant control, as long as the company is active on Companies House and isn't a public limited company. Only one person can actually access the account, even on a two-owner limited company, and that person has to be both a director and a listed PSC. That part is non-negotiable. Partnerships, LLPs, charities and businesses outside the UK can't apply.

The application process runs entirely in-app:

• Download the Mettle app and tap "Open an account".
• Provide your legal name, date of birth, home address and National Insurance number.
• Complete identity verification using your phone camera to photograph a passport or driving licence plus a short selfie video.
• Confirm your business type and expected monthly turnover.
• Receive your sort code and account number once the application is approved, which is normally a few days, not instant.

Mettle's own onboarding page puts the average review time at 5 days, though it warns that a high volume of applications can push this out further and that it can't accelerate or prioritise any single application. The IBAN is a UK IBAN (prefix GB), so international clients sending GBP can do so using standard SWIFT details. The account number and sort code follow the standard UK six-digit sort code format. The main account balance can hold up to £1,000,000, and once that's hit, payments in are declined. There's no notice period, no minimum opening deposit and no lock-in. You can close the account at any time without a fee, though you're expected to clear any pending transactions first.

App quality, features and customer support

The Mettle app is clean and genuinely functional rather than just polished. The home screen shows a real-time balance, a transaction list with merchant logos and editable categories, and quick-access tabs for invoices, tax pots and integrations. In our test, the invoicing tool produced a professional PDF invoice in under two minutes, with automatic payment tracking once the client paid.

The tax pot feature lets you set a percentage of each incoming payment to be swept automatically into a ring-fenced pot, so you don't get caught out in January. For a freelancer managing their own self-assessment, this removes the anxiety of a large January tax bill arriving unexpectedly. It doesn't file or calculate tax for you, but it provides a reasonable buffer. FreeAgent integration is the flagship add-on: connecting takes about five minutes and transaction data flows across automatically, which cuts monthly reconciliation to a fraction of the time it would otherwise take. Xero and QuickBooks also connect natively; there's no direct feed for Sage, so Sage users have to import transactions manually as a CSV, Excel or OFX file.

Mettle prefers in-app chat, but there is a phone line (0800 0987 765) and an email address (support@mettle.co.uk) too; there's still no branch network. Support runs Monday to Friday 8am to 8pm, and 9am to 5pm on weekends and bank holidays, and it isn't a 24/7 live service. Response times during our test were under two hours for routine queries, though more complex account questions didn't move as quickly. The FCA-regulated NatWest Group backing means there's an escalation path to a regulated entity if a complaint is unresolved, which is reassuring even if the day-to-day support channel is limited. Mettle's help centre is reasonably detailed too, so it'll answer most setup questions without you needing to contact the team.

Reputation and real customer experience

Mettle holds a 4.6 out of 5 TrustScore on Trustpilot from more than 6,500 reviews, and around 4.9 out of 5 on the UK App Store, both well ahead of the three-and-a-half-star average that drags down most challenger business accounts. Google Play ratings sit a little lower at roughly 4.8 out of 5, though the review counts on Android are smaller and update less often. The pattern of praise and criticism is remarkably consistent across the review volume. Positive feedback clusters around three themes: the zero-cost structure, the bookkeeping integration and the speed of setup. Freelancers regularly mention that switching from a high-street bank reduced their monthly outgoings noticeably and that the FreeAgent link alone justified the move.

Few free business accounts score this consistently across three separate review platforms.

Recurring complaints fall into two categories. The first is eligibility rejections, which affect applicants with thin credit files or more complex business structures, even when those structures technically qualify. The second is customer support speed on non-standard queries, particularly around account freezes triggered by automated fraud detection. Several reviewers describe frustration at not being able to get through quickly when their account was temporarily restricted, even with a phone line available. These frustrations aren't unique to Mettle, but the lack of a branch network makes them feel more acute than they would at a bank you can walk into.

No credible source reports funds being lost or payments failing at scale, and we didn't find any either, so that's not a reason to hesitate. The NatWest infrastructure underpinning Mettle means Faster Payments processing is reliable. The app itself receives broadly positive notes for stability, with infrequent mentions of crashes or login issues.

Verdict: open Mettle or look elsewhere?

Mettle's earned its strong reputation because it does exactly what it promises for the audience it targets. A UK-based sole trader or freelancer who invoices in GBP, files self-assessment, and wants a clean, free business account with built-in bookkeeping will find almost nothing to complain about. The FreeAgent integration alone makes this one of the highest-value free accounts available in the UK market right now, and the savings pot (0.95% AER, variable, on balances from £10 up to £1,000,000) is a genuine extra for anyone who wants to set tax or VAT money aside without opening a separate account.

The account isn't the right fit for a business that needs an overdraft or credit line, handles a lot of cash, or needs more than one person logging in day to day. Those profiles need something with broader infrastructure, even if that means paying a monthly fee. Starling Business, for instance, offers a broader feature set, and it's a similarly low cost.

If you're a freelancer, sole trader or small limited company asking whether Mettle is worth five minutes of your time, the answer is yes. The signup's fast, the cost's zero unless you choose the optional Mettle+ add-on, and the day-to-day experience is well above what most high-street banks offer small businesses for free. Just be clear-eyed about the boundaries, because there's no overdraft, no outbound international payments, and no branches to walk into.

Frequently asked questions about Mettle

Is Mettle covered by the FSCS?

Yes, eligible deposits with Mettle are protected up to £120,000 under the Financial Services Compensation Scheme, because Mettle is a trading name of National Westminster Bank plc rather than a separate e-money provider. That protection limit is shared across NatWest Group brands, so it isn't additional to any other NatWest Group account you hold.

Does Mettle have a savings account?

Yes, Mettle offers a single savings pot per account paying 0.95% AER (variable) on balances from £10 up to £1,000,000. Interest is calculated daily and paid monthly, and it sits alongside your main balance rather than as a separate product you have to apply for.

Is there a paid Mettle+ tier, and what does it add?

Yes, Mettle+ is an optional add-on at £4 a month on top of the free account. It adds quote-to-invoice conversion and client messaging templates, and it's entirely optional: the core banking, invoicing and FreeAgent integration stay free whether or not you add it.

Can a limited company open a Mettle account?

Yes, a UK-registered limited company can open a Mettle account as long as it has no more than two persons of significant control, is active on Companies House, and isn't a public limited company. Only one of the PSCs can log in and manage the account, so a two-director company still needs to agree on who's holding it.