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Fluid customer service

Contact number
0333 414 1090
Customer support
www.fluid.co.uk
Head office
NewDay Ltd, 7 Handyside Street, London N1C 4DA, United Kingdom

Contact details checked on 13 Nov 2026

Why use our complaint platform?

01

Written in minutes

We help you write an effective complaint in minutes. Our AI cyber hornets are trained on thousands of complaint letters that actually worked.

02

We will make some noise!

Your complaint gets the attention it deserves. Our cyber hornets could post it on social media, send it by printed letter or use other escalation tools at our disposal.

03

Your personal case coach

Our AI models open a case file and keep coaching after you file: what to reply, when to push, and how to escalate if nothing happens.

04

You are not alone

Join 73,608 consumers who refused to be ignored. Our community is there for advice while you chase your resolution.

Is Fluid legit?

Legit

Fluid is exactly what it says, a UK balance transfer card from NewDay, the lender behind Aqua, but its 0% deal comes with conditions. Only balances moved in the first 60 days get it, each transfer carries a 3% fee, and a late payment or going over the limit ends the 0% early.

What we checked

  • Authorised card lender since 2016
  • Lender registered in 2010
  • Registered office in London
  • Ratings on other review websites: 4.5/5

Watch out for

  • A balance moved after the first 60 days, which the terms charge at the standard transfer rate instead of 0%.
  • A transfer from an Aqua, Marbles, Opus or Bip card, which Fluid does not accept as a balance transfer.
  • An email that looks like it comes from Fluid and asks for your account details or card security code.

Charged interest on a Fluid 0% transfer?

We help you write it, it gets its own public page, and you can have it sent to Fluid as a formal letter.

File a Fluid complaint

Common customer service questions about Fluid

How do I file a complaint about Fluid?

Do you have a dispute or a bad customer experience with Fluid? Report it through our website to maximize the chance of getting it resolved.

We help you write an effective complaint in minutes. Our AI models are trained on thousands of effective complaint letters. Then we push it through emails, social media, paper complaint letters and other tools at our disposal. And you are not alone: our helpful community is there for advice.

How do I contact Fluid customer service?

Call Fluid customer service on 0333 414 1090 for account questions and payments; the same number is the one to use for a lost or stolen card. Existing cardholders can also send a message through the Fluid online account manager, and the Fluid contact page, linked in the contact details above, lists separate lines for balance transfers and card activation. Have your card number and a recent statement ready.

Charge or interest on your statement you dispute? Start your complaint here as well, and we push it out to Fluid by email, social media and printed letters.

Who provides the Fluid credit card?

The Fluid credit card is provided by NewDay Ltd, a UK card lender based in London, which uses the Fluid name under licence from NewDay Cards Ltd. NewDay also runs the Aqua, marbles, Opus and Bip cards, and a complaint about a Fluid account goes to NewDay through the Fluid contact routes. Fluid's site says you cannot get a Fluid card if you already hold one, or if you took out an Aqua, marbles, Opus or Bip card in the past 6 months.

How does the Fluid 0% balance transfer work?

The Fluid 0% balance transfer applies to balances you move to the card within 60 days of opening the account, for a limited promotional period and with a transfer fee, according to Fluid's site; after that period the standard rate applies to whatever is left. Your summary box and credit agreement give the exact period and fee for your account, and they also say what rate applies to later transfers, to purchases and if a payment is missed.

Pay at least the minimum on time every month and keep each statement, because the dates decide which rate applied.

Interest charged on a balance you moved inside the window? Raise it through our complaint process: our trained AI opens a case for you and keeps coaching you on what to send Fluid and when to push again.

Can I take a Fluid complaint to the Financial Ombudsman Service?

Yes: in the UK, the Financial Ombudsman Service settles disputes between consumers and financial businesses, and Fluid names it for complaints about a Fluid credit card account with NewDay Ltd. The Financial Ombudsman Service generally expects Fluid to have had the chance to put things right first, so keep a record of every call, message and statement.

Interest, charges or a limit decision you dispute? We help you write the complaint in minutes, with the dates and the statements set out clearly.

What do people complain about most at Fluid?

Nothing has been reported about Fluid here yet. Our research shows what typically goes wrong at balance transfer credit cards: interest charged on balances cardholders expected to be at 0%, transfer fees they did not see coming, transfers that are slow or refused, late payment charges, credit limit decisions, and statements that are hard to reconcile.

Paying interest on a balance you moved at 0%? Be the first to report it: your case opens the record for the next Fluid cardholder checking a statement against the offer.

What happens after I submit my complaint?

Your complaint gets its own public page on Complain.biz and we get to work: we bring it to the attention of Fluid through emails, social media, paper complaint letters and other tools at our disposal.

And we stay with it after you file. Our trained AI opens a case file for you and keeps coaching: what to reply, when to push again, and how to escalate if nothing happens.

Can other consumers help me with my Fluid complaint?

Yes. We have an active community of consumers, and complaints here are public: people who ran into the same problem with Fluid can give you advice or back you up with their own story. A complaint with a community behind it is much harder to overlook.

Fluid complaints

0 complaints

Helpful experiences shared by Fluid customers. Search, discuss and connect with other people in our community.

Fluid complaints per month

Dec 2025 - Nov 2026

Complaints filed on Complain.biz about Fluid in each of the last twelve months.

  • 0 Dec
  • 0 Jan
  • 0 Feb
  • 0 Mar
  • 0 Apr
  • 0 May
  • 0 Jun
  • 0 Jul
  • 0 Aug
  • 0 Sep
  • 0 Oct
  • 0 Nov

No complaints about Fluid yet. Yours can be the first.

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How Fluid compares

Fluid customer service compared to others in the Banks category.

Company Complaints Biggest problem
Revolut 17 complaints Money held or account blocked
HSBC 4 complaints
Barclays 1 complaint
Lloyds Bank 1 complaint
Fluid (this page) 0 complaints No complaints yet
Furness Building Society 0 complaints No complaints yet
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