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Monzo Flex review

Updated September 28, 2026 · DebitCue Editorial Team · Facts checked September 26, 2026

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Our verdict

Monzo Flex suits UK adults who pay their balance in full and want a credit card with no annual fee, no overseas conversion fee and an interest free window on larger buys. The number to weigh is the rate on anything left unpaid: 29%, above the site median of 20.97%.

Key facts

Best for
Paying in full each month and spending abroad on a card with no annual fee.
Annual fee
£0 (Source, checked September 26, 2026)
APR
29% (Source, checked September 26, 2026)
Currency conversion fee
0% (Source, checked September 26, 2026)
Rewards type
None (Source, checked September 26, 2026)
Perks
0% interest over 3 months on purchases of GBP 100 or more, repeatable, 0% interest if you pay in full, No overseas fees (Mastercard exchange rate only), Section 75 purchase protection, Credit limit up to GBP 10,000, Flex purchases from up to 2 weeks ago, Instant notifications and real-time balance updates, Separate paid card: Aura (GBP 15 a month) adds 1% cashback on groceries, 0.5% on everything else uncapped, auto-invested cashback, Apple TV, Google AI Plus, 2 airport lounge and 2 fast track passes a year (Source, checked September 26, 2026)
Card kind
Credit (Source, checked September 26, 2026)
Legal entity
Monzo Bank Limited (Source, checked September 26, 2026)
Headquarters
United Kingdom (Source, checked September 26, 2026)
Founded
2015 (Source, checked September 26, 2026)
Support channels
Help-centre, Chat
Pricing model
No annual fee
Features
Virtual card, Travel
Audience
Kids, Business
Official website
monzo.com

Debit cards

Monthly fee
£0 (Source, checked September 26, 2026)
Currency conversion fee
0% (Source, checked September 26, 2026)
Free ATM withdrawals
£200 (Source, checked September 26, 2026)
Card type
Debit (Source, checked September 26, 2026)
Card network
Mastercard (Source, checked September 26, 2026)
Currencies
38 (Source, checked September 26, 2026)
Legal entity
Monzo Bank Limited (Source, checked September 26, 2026)
Headquarters
United Kingdom (Source, checked September 26, 2026)
Founded
2015 (Source, checked September 26, 2026)
Support channels
Help-centre, Chat
Features
Virtual card, Travel
Audience
Kids, Business

Apps and profiles

Get the app
App Store
Elsewhere
WikidataWikipediaLinkedInX

Pros and cons

Pros

  • Nothing to pay for holding it: an annual fee of £0 and a monthly fee of £0, ranking 1 of 301 brands on annual fee.
  • Nothing added for spending abroad either, with a currency conversion fee of 0% against a site median of 1%.
  • Interest free when the balance is paid in full, plus a repeatable interest free window on larger purchases, so 29% only bites on carried balances.
  • Virtual cards and travel features sit in the account, with no charge on ATM withdrawals up to £200 and support for 38 currencies.
  • Section 75 purchase protection comes with the card at no extra cost.

Cons

  • 29% is the weak point, sitting above the site median of 20.97% and the credit category median of 20.85%, so any carried balance costs more than most.
  • Rewards type is none on the card itself, so no cashback, points or miles come with it and the cashback sits on the paid Aura card.
  • Support runs on help centre and chat only, so there is no phone channel listed for urgent disputes.
  • Every purchase is borrowing, where a debit account such as Starling Personal Account Debit Card spends money the reader already holds.
Monzo Flex

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Scored 8.8 / 10 by DebitCue.

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Who it suits

  • People who clear the balance every month and want an interest free window without an annual fee.
  • UK residents who spend abroad regularly, since 0% applies to the conversion and the card runs on mastercard.
  • Households and small businesses: kids and business are the audiences the account is listed for, and the ATM allowance suits a shared setup.

Who should look elsewhere

  • Borrowers who will carry a balance month to month: Monzo Flex charges 29%, while Starling Personal Account Debit Card charges 15% on its overdraft.
  • Anyone after a secured card rather than a Monzo Flex credit limit: Varo Believe Secured Credit Card and Chime Card (Secured Visa Credit Card) each carry an annual fee of $0 and $0.
  • Readers who would rather hold a balance than owe one: Starling Personal Account Debit Card draws on an account balance, so there is no rate to pay on everyday spending.

Deposit protection

Deposit protection applies to money held in an account, so the safety question for this card is about who carries the credit risk instead. Two UK regulators sit over the issuer, and the Financial Conduct Authority reference on record is 730427. A missed payment is therefore chased by a regulated UK bank rather than an intermediary or a peer-to-peer platform. Purchase cover is listed with the card's perks as well, which sits alongside the lending relationship rather than replacing it. Readers weighing safety should treat the licence as the anchor and the purchase protection as the extra layer.

Who regulates it

The Financial Conduct Authority is the authorising regulator named on the licence record, and its reference is 730427. The Prudential Regulation Authority also appears, supervising the bank's prudential side, so conduct and capital are watched by separate bodies rather than a single regulator. That combination is a full banking licence, and it is a different footing from apps that arrange lending through a third party. For readers comparing lenders, the practical effect is that complaints and conduct rules run through the same framework that covers ordinary current accounts.

How it compares on our data

Monzo Flex's standing is lopsided in a useful way. It ranks 1 of 301 brands on annual fee, 1 of 181 on currency conversion fee, and 107 of 133 on APR. The pattern is worth stating plainly: nothing to pay for holding the card, nothing to pay for spending abroad, and a rate that sits mid-table for anyone who does not clear the balance. Readers who pay in full each month are buying the two strongest positions in the comparison, while readers who carry debt are joining the middle of the interest field.

Rewards and perks

No rewards sit on Monzo Flex itself: the rewards type is none, so there is no cashback, points or miles on the card. What the card does carry is practical. There is a repeatable interest free window on larger purchases and interest free spending whenever the balance is paid in full. Foreign spending adds no fee, so only the Mastercard exchange rate applies, and Section 75 purchase protection is included. A credit limit is set with the bank, recent purchases can be flexed, and instant notifications with real-time balance updates follow every charge. Cashback lives on a separate paid card, Aura, which adds a monthly charge, pays cashback on groceries and on other spending, invests that cashback automatically, and bundles entertainment subscriptions with airport lounge and fast track passes. None of that comes with the free card.

Fees and FX

Three numbers decide this card. The annual fee on the Monzo Flex credit card is £0 and the currency conversion fee is 0%, so holding it and spending abroad cost nothing on those two lines. The rate that matters is 29%, charged on balances that stay unpaid. Read it as a warning rather than a running cost: clear the balance in full and the interest free terms apply, carry it and the charge builds each month. The paid Aura card adds its own monthly cost, which sits outside the free card and only makes sense for households that would use the cashback and the lounge passes.

The company behind it

Monzo Flex is issued by Monzo Bank Limited, a bank based in the United Kingdom that was founded in 2015. Its Financial Conduct Authority reference is 730427, so one licence covers both the credit card and the current account business. Support runs on help centre and chat, meaning a help centre and in-app chat handle questions, with no phone line listed for urgent disputes. A bank of that size brings scale and an established operating record, though a digital support model means any escalation is done in writing.

How Monzo Flex compares

Where Monzo Flex is available

Available
United Kingdom
Licence in United Kingdom
Financial Conduct Authority (730427), checked September 26, 2026
Licence in United Kingdom
Prudential Regulation Authority, checked September 26, 2026

Countries from the brand (Source, checked September 26, 2026)

Frequently asked questions

What does Monzo Flex cost to hold?+

The credit card carries an annual fee of £0 and a monthly fee of £0, so maintaining it costs nothing to hold. The fee model is listed as no annual fee, and the card ranks 1 of 301 brands on that measure. A separate paid card called Aura adds a monthly charge if cashback is wanted.

What rate applies if I carry a balance?+

Monzo Flex charges 29% on balances that are not cleared, against a site median of 20.97% and a credit category median of 20.85%. The interest free terms soften that figure, since paying the balance in full costs nothing and a repeatable interest free window applies to larger purchases.

Does it cost anything to spend abroad?+

The currency conversion fee is 0%, so spending outside the UK relies on the Mastercard exchange rate and nothing else. The account supports 38 currencies, and the card ranks 1 of 181 brands on conversion costs, versus a site median of 1%.

Who regulates the lender and what covers a purchase?+

The issuer is authorised by the Financial Conduct Authority, reference 730427, and supervised by the Prudential Regulation Authority. Section 75 purchase protection is listed among the card's perks, sitting alongside the regulated lending relationship rather than replacing it.

Does the card earn cashback or points?+

Not on the card itself: the rewards type is none, so no cashback, points or miles come with the free Monzo Flex. Cashback sits on Aura, a paid card with a monthly charge that pays cashback on groceries and everyday spending, invests it automatically, and adds entertainment subscriptions plus airport lounge and fast track passes.

What kind of card is it and what comes with it?+

It is a credit card running on the mastercard network, with virtual card and travel features among the account offering. ATM withdrawals carry no charge up to £200, and spending abroad adds no conversion fee. Instant notifications and real-time balance updates keep the balance visible as charges land.

How much can I spend and can a purchase change later?+

A credit limit is set with the bank, and purchases can be flexed after they are made as long as the purchase is recent, which suits a household sharing the account. Instant notifications and real-time balance updates make a large charge visible before the statement closes. Monzo Flex is a credit card, so the limit is money to repay.

How do I get help with a problem?+

Support runs on help centre and chat, so a help centre and in-app chat handle questions. There is no phone channel in the support record, meaning a disputed transaction is dealt with in writing. Real-time balance updates help spot an unfamiliar charge early so it can be reported through the app.

Sources

  • en.wikipedia.org/wiki/Monzo_(bank) checked September 26, 2026

    Backs: Card type, Founded

    “Customers signing up for the current account are issued a Debit Mastercard”

  • monzo.com/credit-cards checked September 26, 2026

    Backs: Annual fee, APR, Card kind, Currency conversion fee, Headquarters, Legal entity, Pricing model, Perks, Rewards type, Licences

    “Flex Purchase - No monthly fee”

  • monzo.com/current-account/plans checked September 26, 2026

    Backs: Features, Monthly fee

    “Virtual cards (Extra, Perks, Max); Worldwide travel insurance (Max)”

  • monzo.com/features/travel checked September 26, 2026

    Backs: Free ATM withdrawals, Audience, Currencies, Card network

    “If Monzo's your main bank account, make unlimited fee-free withdrawals in the European Economic Area (EEA), and up to GBP 200 every 30 days anywhere else. After that, we'll charge 3%”

Compiled from 4 source pages, checked September 26, 2026. We did not open an account.

Monzo Flex

Monzo Flex

Paying in full each month and spending abroad on a card with no annual fee.

8.8/10See alternatives