The short version: Most online business bank accounts cost nothing to open but charge $10-30 monthly unless you hit minimum balance requirements (usually $2,500-10,000). Traditional banks are slower and older; fintech banks like Mercury, Novo, and Brex are faster and cheaper if you qualify. Pick based on your actual cash flow, not the marketing.
Why you need a separate business account (and when you don’t)
I opened my first online business account in 2008 because I was terrified of an HMRC audit. That fear was probably 30% real and 70% me being neurotic, but it turned out to be the right move anyway. A separate business account does three concrete things: it makes tax time infinitely less chaotic, it signals to clients that you’re professional (even if you’re a one-person operation), and it protects your personal assets if anything goes legally wrong.
The one time you don’t need it is if you’re running a tiny side hustle making under £1,000 a year. Below that threshold, HMRC treats it as a hobby. But the second you’re serious about income, separate accounts save you hours of bookkeeping headache and thousands in accountant fees because your records are already clean.
The actual cost breakdown (not what the websites claim)
Here’s what nobody tells you upfront: “free” business accounts often come with sneaky costs.
- No monthly fee, but a minimum balance trap. Starling Business and NatWest Business Premium charge zero monthly, but you need to keep £3,000-5,000 in the account or they’ll hit you with charges. That’s your money locked up, earning nothing. If you run tight cash flow, this costs you more than a monthly fee would.
- Flat monthly fee with no hidden catches. Wise Business (formerly TransferWise), Mercury, and Novo charge £8-25 per month with no balance requirement. You know the cost upfront. If you’re moving money between currencies regularly, Wise’s fee is offset by their exchange rates being better than your high street bank.
- Free for the first year, then it jumps. Some fintechs offer free accounts initially to hook you, then charge after 12 months. Always read the small print on the pricing page.
- Transaction fees that pile up quietly. Most modern accounts have unlimited free transfers between UK banks, but some charge per international wire. A single wire to the US might cost £15-40. If you work with international clients, this matters.
My rule: if your total monthly costs (fees plus the lost interest on trapped minimum balances) exceed £25, you’re probably in the wrong account.
The three types of online business accounts that exist
Type One: High street banks with online platforms. Barclays, HSBC, NatWest all have business accounts. They’re safe, your money is 100% covered by FSCS protection, and they’re widely accepted. The downside: clunky interfaces, slow transfers (2-3 business days), and you’re locked into their fee structure with zero flexibility. Your personal relationship manager doesn’t exist; you’ll call a contact centre. Use these only if your clients demand it or you need a business overdraft facility (which they offer; fintechs usually don’t).
Type Two: Fintech banks built for freelancers and small businesses. Starling Business, Tide, Wise Business, and Novo are all licensed banks, not payment apps. Your money is insured the same way as a traditional bank. They have beautiful apps, instant notifications, and you can do most things without a phone call. Mercury (US and UK as of 2026) and Brex (US primarily, but expanding) are newer and have better integrations with accounting software. The catch: some won’t open an account if you’re a sole trader with less than £20,000 annual turnover. They’re picky about your business structure.
Type Three: Payment platforms that pretend to be banks. PayPal Business, Stripe, Square. These aren’t true bank accounts; they’re merchant accounts sitting on top of banking partnerships. Money takes 1-2 days to reach your actual bank. Fees are higher. Don’t use these as your primary business account unless you’re a high-volume e-commerce shop and their transaction fees are cheaper than the alternative. I see too many freelancers stuck here.
How to choose the right one for your situation
Stop looking at review websites. They’re written by people with different businesses than yours. Here’s how I talk through this with people in my consulting work:
Question One: Are you sole trader, partnership, or limited company? This matters because some accounts require proof of company registration (limited) and some don’t (sole trader). Sole traders can use almost anything. Limited companies need a proper business account. If you’re not sure which you are, your accountant took five seconds to tell you, so go ask them.
Question Two: How much money moves through your account monthly? If it’s under £5,000, you need something cheap and cheerful. Tide or Starling. If it’s £5,000-50,000, you have options; pick based on features. If it’s over £50,000, call an actual bank because you might negotiate fees and they’ll want your business.
Question Three: Do you need international payments or multi-currency? If you’re invoicing in euros or dollars, Wise is the obvious answer. Their exchange rates beat every bank I’ve ever seen. If you’re pure sterling, it doesn’t matter.
Question Four: Do you want integrations with your accounting software? Xero, QuickBooks, and Freshbooks connect brilliantly with Mercury, Tide, Starling, and Novo. They connect badly or not at all with traditional banks. If your accountant uses Xero and you want them to see your balance in real time, this is the decision point.
I run my consultancy on Mercury because they integrate with Xero (which my fractional CFO uses), they approved me immediately despite being young as a company, and their app is the only one where I can see my balance and outstanding invoices in one place. Cost: £25 monthly. It’s worth it for the time I don’t waste emailing my accountant asking “what’s my balance?”
The fees that will bite you
Monthly fee is only part of the story. Here’s where people get stung:
Paying bills. Most modern accounts include free standing orders and direct debits. Some charge per transaction if you go above 50 per month. Work this out based on how many suppliers you pay.
Cash deposits. If your income comes from cash (restaurants, retail, events), you need to know: traditional banks let you pay cash into a branch for free. Most fintechs don’t have branches. You’d need to post cheques or arrange a cash collection, both of which cost. This is the one area where old-school banks win.
Overdrafts. Most fintechs don’t offer them. If you need borrowing flexibility, you need a traditional bank or a separate overdraft facility from somewhere like Iwoca or Liberis. Know this before you sign up.
International transfers. Wise charges roughly 0.7% of the amount plus £2.50. Starling charges £2 flat. Mercury charges nothing if both accounts are in the US, but charges if you’re sending to the UK. Work out your actual costs based on your actual payment patterns.
The setup process: what takes time
Opening the account is 15 minutes. Getting verified and approved takes the real time.
Fintech banks are fastest: Starling, Tide, and Novo verify you in hours, sometimes minutes. I opened a Novo account at 2pm and had a card number by 4pm. Mercury takes 2-3 days because they’re more thorough; they ask where your money comes from and what your business does. This is good; it’s them doing proper due diligence.
High street banks are slowest. NatWest asked for company accounts, three months of invoices, and proof of address. Total time: 10 days. But they wanted documentation that proved the business was real, which is fair.
Before you apply anywhere, have ready: proof of ID (passport), proof of address (recent utility bill), company registration number (if limited), and a clear answer to “what does your business do?” If they reject you, it’s usually because your answer was vague.
The one thing nobody warns you about
Once you’ve picked an account, the hardest part isn’t the account itself. It’s updating every client, supplier, and contact who has your old bank details. I switched accounts in 2021 and missed updating two major clients for six weeks; their payments went to the wrong account and nearly caused a cash crisis.
Build a spreadsheet right now of everyone who pays you and everyone you pay. When you switch, contact them all in writing. Email isn’t enough; call the big ones. This takes two hours and saves you weeks of stress.
What I Switched To After Three Banks in Five Years
I opened my first business account with Barclays in 2011 because it was the bank I already used personally and I didn’t think about it any harder than that. Big mistake. The relationship manager changed four times in two years, the online platform looked like it hadn’t been touched since 2008, and getting a simple query answered meant a 40 minute hold. I moved to Tide in 2018 and then added Mettle alongside it in 2021 once I started running a separate account for a small consultancy arm of my business. That’s the bit nobody tells you: you don’t have to pick one and marry it.
Tide costs me nothing on the free tier and handles 90% of my invoicing and expense categorisation without me touching an accountant. The catch is their customer support is chat only, and if something goes wrong on a Friday evening you’re waiting until Monday. Mettle, which is backed by NatWest, gave me a real person to call within three rings the one time a payment got stuck, but the app itself is clunkier for exporting data into Xero. I use Tide for day to day invoicing and Mettle as the account where I keep six weeks of runway, because I want a human safety net attached to the money that matters.
The number that changed my mind about “free” business banking was £180. That’s roughly what I was paying Barclays a year in account fees and card charges for features I never used, like a cheque book I hadn’t touched since 2014. Moving that £180 a year into a proper bookkeeping tool made a bigger difference to how I run my business than the bank switch itself did.
- If you invoice fewer than 20 clients a month, a free digital bank is enough.
- If you hold more than about £15,000 in reserve, put it somewhere with FSCS protection you’ve checked, not assumed.
- Ask any bank you’re considering how long their average phone wait time is. Most won’t give you a straight answer, and that tells you something too.
Frequently asked questions
Can I use a personal account for my business?
Technically yes, legally risky, practically stupid. Your bank can close the account if they find out you’re trading. You lose the liability protection of a separate business structure. And when your accountant looks at your personal transactions mixed with business ones, they’ll charge you extra hours to untangle it. Open a business account; it’s free or under £30 per month. The cost is negligible.
What if a bank refuses to open an account for me?
Banks can refuse anyone, and they don’t have to explain why. If this happens, try a different bank (fintech first; they approve faster). If multiple banks refuse you, there’s usually a reason: your name on credit agencies flagged somehow, your business description was too vague, or you didn’t provide proper documentation. Ask your accountant or a small business advisor to help you work out why. Wise Business and Starling are the most accommodating; try them first if you’ve been rejected elsewhere.
Do I need a business credit card or just a business account?
Two separate things. A business account is where money lands. A business credit card is for spending and building credit history. You don’t need both to start; the account is essential, the card is optional. Many freelancers use one personal credit card for business expenses and reconcile it against the business account monthly. Only get a business card if you need the accounting separation or want to build business credit for future borrowing.
What happens to my money if the bank goes bust?
In the UK, every bank (traditional or fintech, as long as they’re FCA-authorised) is covered by the FSCS up to £85,000 per person per bank. Your business account is protected separately from your personal account. So if you have £50,000 in a business account and £50,000 in your personal account at the same bank, you’re fully covered if something goes wrong. Check the FSCS website to confirm your bank is listed before you open the account.
For the bigger picture, see my full guide to ecommerce marketing.
Related reading: AI Lead Generation Workflows for Service Businesses: What Works (and What Doesn’t) and How to Use AI to Turn One Piece of Content Into Ten.
