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 account opened smoothly within a working day, and the invoicing features worked exactly as described on first use.

The account 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. 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 and a handful of other popular bookkeeping tools.

Mettle is explicitly not suited to limited companies that need an overdraft, businesses that handle significant cash, or any operation requiring branch access. Cash deposits are not supported at all. Firms with complex multi-user requirements or those that need credit facilities, CHAPS payments or international SWIFT transfers should look at a different provider from the outset, because Mettle does not offer any of those.

Real costs and any fees worth knowing

The headline is genuinely accurate: the monthly fee is 0.00 GBP. There are no plan tiers, no premium upgrade and no hidden subscription. UK bank transfers (Faster Payments) are free to send and receive. The Mastercard debit card is issued at no cost and replacement cards are also free.

Where Mettle generates friction is cash. There is no fee-free ATM allowance; cash withdrawals via the debit card carry standard Mastercard ATM charges, and cash deposits are not possible at all through the Post Office or any retail counter. Businesses that collect cash regularly will hit a wall quickly. Foreign currency spending goes through the Mastercard exchange rate, which is close to interbank but not guaranteed fee-free on every transaction, so volume FX users should factor that in.

Instant bank transfers (Faster Payments) are included. There is no CHAPS service, no international wire, and no batch payment facility. If a client abroad needs a GBP payment reference, Mettle can receive it, but sending internationally is not 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. There is 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.

The absence of virtual cards is worth noting for businesses that run multiple subscriptions or want to ring-fence spend by project or supplier. Competitors such as Revolut Business offer virtual cards as a core feature; Mettle does not. If you routinely need to issue a new card number for each vendor, that gap matters.

Card spending limits follow standard Mastercard business debit parameters. Mettle has not 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 is restricted to sole traders and individual freelancers registered in the UK; limited companies, partnerships and businesses outside the UK cannot apply. NatWest uses this restriction to keep its fraud risk profile tightly controlled, which is sensible, but it excludes a meaningful slice of the market.

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, typically within one business day.

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. There is no notice period, no minimum opening deposit and no lock-in. You can close the account at any time without a fee, though you are 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. For a freelancer managing their own self-assessment, this removes the anxiety of a large January tax bill arriving unexpectedly. It does not 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.

Customer support is chat-based inside the app. There is no phone number and no branch network. Response times during our test were under two hours for routine queries, but more complex account questions took longer. The FCA-regulated NatWest Group backing means there is 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 also maintains a reasonably detailed help centre online, which answers most setup questions without needing to contact the team.

Reputation and real customer experience

Mettle sits at a solid four-star rating across major review platforms, with the pattern of praise and criticism being remarkably consistent across hundreds of reviews. 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.

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 as sole trader. 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 speak to a human quickly when their account was temporarily restricted. These are not unique to Mettle, but the absence of a phone line makes them feel more acute than they would at a bank with branches.

No credible source reports issues with funds being lost or payments failing at scale. 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 earns its four-star score 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.

The account is not the right fit for a growing limited company, for anyone needing an overdraft or credit line, for cash-heavy businesses, or for firms with international payment requirements. Those profiles need something with broader infrastructure, even if that means paying a monthly fee. Starling Business, for instance, accepts limited companies and offers a broader feature set for a similarly low cost.

If you are a freelancer or sole trader asking whether Mettle is worth five minutes of your time, the answer is yes. The signup is fast, the cost is zero, 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: no cash, no credit, no branches, and no phone support.