There's a peculiar moment most people hit when they first understand how stoozing works. They sit down, run the numbers, realise they can make £300–£800 a year from money they were going to spend anyway, and then... they feel guilty.
Not guilty about anything they've done. Guilty about what they're about to do.
"Is this even allowed?" they ask. "Isn't this cheating?" "Will the credit card company close my account?" "Am I a bad person for doing this?"
I'm here to tell you: no. Not to any of those questions. The guilt you're feeling is real, but it's completely misplaced. And worse, it's stopping you from doing something that's entirely legitimate, genuinely helpful to your finances, and something that millions of UK savers already do quietly and without fanfare.
Let me explain why.
Why Stoozing Guilt Is So Common
First, the guilt you're feeling makes sense. You've been conditioned your whole financial life to think of credit cards as dangerous. And they are, if you use them wrong. Credit cards are how people rack up £5,000 in debt at 19% APR. Credit cards are what derail young people's finances. Credit cards are the enemy.
So when someone tells you that credit cards can earn you money, your brain short-circuits. It doesn't compute. It feels like you're bending the rules.
Add to that a deeply ingrained sense that "free money" doesn't exist. If you're making money, someone else must be losing it. Banks don't do charity. So if you're earning 4–5% interest on a 0% credit card, surely there's some catch. Surely the bank is about to clap down on this. Surely you'll get in trouble.
This fear is normal. It's also, almost entirely, unfounded.
The guilt also stems from something psychological: you're thinking like a borrower, not an earner. Most people interact with credit cards as debt. They carry a balance, pay interest, and lose money. So using a credit card to make money feels backwards. It feels like you're doing it wrong.
Here's the truth: you're not. You're doing it exactly right.
What the Banks Actually Think
This is the part that shocks most people: banks know about stoozing. They've always known. It's not a secret, a loophole, or a glitch they're about to fix.
When a bank issues a 0% credit card, they know full well that some customers will use it like this. They've factored it in. The 0% offer is designed for people who want to spread a purchase over interest-free months. But banks also understand that savvy customers might park money in a savings account instead.
Here's why they don't care (or at least, why they're not about to shut you down): You're still using the card. You're making transactions. You're within the terms and conditions. You're a paying customer who's engaged with their product. From the bank's perspective, you're better than someone who signs up and never uses the card at all.
Banks make money on stoozing indirectly. Every time you use the card to move money into savings, you're registering activity on their network. They benefit from the perception of an active account. And if, in the future, you forget about the 0% expiry date and accidentally carry a balance, they've just gained a high-interest customer.
But more importantly: using a 0% card to earn interest isn't theft. It's not fraud. It's not even bending the rules. It's using the product as designed, within all terms and conditions.
Nobody has ever been pursued by a bank for stoozing. It's not happening. It won't happen to you.
The Tax and Legal Reality
Here's what actually matters legally: you have to pay tax on interest you earn. Full stop. That's the rule.
But here's the thing: if you're earning interest on a savings account (whether funded by bank switch bonuses, stoozing, or regular savings), you might have a tax allowance that covers it entirely. The Personal Savings Allowance in 2026 is £1,000 for basic-rate taxpayers. That means your first £1,000 of savings interest is tax-free.
When you do your Self-Assessment, you report the interest. You possibly owe tax. You possibly don't—it depends on your overall income. But you're not committing a crime. Millions of savers do this every year, and it's completely normal.
Stoozing doesn't exist in some legal grey area. It exists in the same space as any other savings strategy. The interest is taxable income. That's it. That's the whole story.
If you're worried about this, put it in your Self-Assessment. Problem solved.
Why This Actually Makes Financial Sense
Here's the part that might shift your thinking entirely: stoozing isn't clever because you're gaming a system. It's clever because you're using a system as intended.
Credit card companies offer 0% periods because they want to attract customers and demonstrate utility. Savings accounts exist to park money. Stoozing is simply the intersection of those two things: using a temporary interest-free loan period to hold money that earns interest in the meantime.
The magic happens because of interest compounding over time, and because you're getting paid interest on money that the credit card company is, for the purposes of their 0% period, letting you borrow for free. It's not a cheat. It's just maths.
Consider a practical example: You get a 0% credit card offer with a 24-month interest-free period. You transfer £2,000 onto it. You immediately move that money to a savings account earning 4.5%. Over two years, you earn roughly £190 in interest. You pay the credit card off on month 23. You've made £190 from the privilege of borrowing money interest-free.
That's not cheating. That's financial efficiency. That's what smart savers do.
Banks would prefer you to spread purchases over the 0% period and then stop using the card. But they're not going to punish you for being smarter than that.
Getting Started Despite the Doubts
If you're reading this and still feeling that nagging guilt, here's my advice: start small.
Open a 0% credit card offer. Transfer £500. Move it to a savings account. Watch that interest accumulate over 6 months. See what it feels like. Realise that nothing bad happens. Realise that the bank doesn't close your account. Realise that your credit score doesn't plummet (it actually might improve slightly, because you're using credit responsibly).
Once you've done it once, the guilt evaporates. You'll realise it was anxiety about the unknown, not about anything actually wrong.
If you want to understand the mechanics better, check out how stoozing works and use the stoozing calculator to see exactly how much you'd earn in your situation. Sometimes the guilt comes from not quite understanding how the numbers work.
For finding the right 0% card, browse best 0% cards and see what's available. For running scenarios and seeing returns, the earnings calculator gives you clarity on exactly what you'd make.
Once you've got the numbers and the mechanics clear, the guilt usually just... disappears.
Common Questions
Is stoozing illegal?
No. Stoozing is completely legal. You're using a credit card within its terms and conditions. You're earning interest on savings. You're paying tax on that interest if applicable. Every single part of this is normal, legal, and common.
Will the bank close my account if they find out I'm stoozing?
Banks aren't "finding out" anything because there's nothing to find out. You're not hiding anything. You're a customer using their product. Millions of people stooze quietly, and the banks continue to issue 0% cards because they want your business.
What if I accidentally spend the money I've stoozing with?
Then you owe the credit card company that money, at their full APR (usually 18–21%), retroactively from the beginning of the 0% period if you don't pay in full by the deadline. This is the one real risk of stoozing—not the bank punishing you, but you disciplining yourself to not touch the stoozing funds. It's why most people stooze with amounts they know they can comfortably pay back.
Does stoozing hurt my credit score?
Actually, stoozing might help your credit score slightly. You're using credit responsibly (using available credit without missing payments), and you're keeping your credit utilisation relatively low if you're moving the money off the card into savings quickly. Where people damage their credit is by overspending and carrying balances.
How much can I realistically earn from stoozing in my first year?
This depends on how many 0% cards you can get, how much you can move onto each one, and current savings rates. A realistic first year for someone starting from scratch might be £200–£500 in interest from stoozing alone. Combine that with a bank switch bonus or two, and you're looking at £400–£700 total. It's not life-changing money. It's also not nothing. And it grows year on year as you refine your system.
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