You've probably seen the clickbait: "Earn 5% Risk-Free on Your Spending" or "Turn Your Credit Card Into a Savings Account." Stoozing can genuinely make you money. But between the headlines and your bank account sits a gap that catches most people out.
This is what the real numbers look like, and when stoozing actually makes sense for you.
What Stoozing Actually Is (And Why It Matters)
Stoozing is simple on paper: you borrow money on a 0% credit card, deposit it in a high-interest savings account, and keep the interest. The bank's money, the interest yours. If you stooze £1,000 at 4% interest while the card charges 0%, you pocket the spread — roughly £40 a year.
In practice, it's more complex. You're managing multiple accounts, tracking deadlines (the card's 0% period always ends), monitoring interest rate changes, and dealing with banks that actively don't want you doing this. The friction adds up.
But the friction isn't why most people's stoozing earnings disappoint them. It's the gap between headline rates and actual money in the account.
Why Headline Rates Are Lies (Even When They're True)
A savings account advertises "4.5% on balances up to £10,000." That sounds straightforward. You're probably expecting to earn 4.5% annually.
Here's what actually happens: the rate applies only if you meet specific conditions. You might need to:
- Pay in £500 every month (a requirement many stoozing guides ignore)
- Not withdraw money mid-month
- Have active direct debits from the account
- Meet a minimum balance on a specific day
When you breach even one condition, the rate drops to 0% or 0.1% for that month. A single missed payment? Your interest halves.
Most stoozing guides show idealized scenarios: perfect execution, zero friction, no missed deadlines. Real stoozing is messier. You'll probably earn 60–75% of the advertised rate if you're organised, sometimes less.
The Real Numbers (June 2026)
Let's work through an actual scenario.
You open a 0% credit card with a 24-month interest-free period. You stooze £2,000 by moving it to a high-interest savings account (currently around 4.2% for easy-access accounts, maybe 4.5% for regular savers with conditions).
Best-case scenario (disciplined execution):
- £2,000 at 4.2% over 2 years = £172 gross interest
- Minus tax (20% basic rate): £138 net
- Your effort: 2 hours to set up, 10 minutes monthly to monitor
Realistic scenario (some friction, one missed deadline):
- £2,000 at 3.5% over 2 years (account rate dropped due to conditions) = £143 gross interest
- Minus tax: £114 net
- Your effort: 2 hours to set up, 30 minutes monthly to monitor and fix issues
That £114 works out to about £57 per year, or £1.10 per week. For most people, that's below minimum wage for the administration.
Here's where it gets interesting: you're probably not stoozing just £2,000. People who seriously pursue stoozing run 3–5 cards simultaneously. That 3–5× multiplier is where stoozing becomes a real income source.
Three cards × £2,000 each = £6,000 stoozing at realistic 3.5% = £210 net per year (after tax).
Five cards × £2,000 = £10,000 at 3.5% = £350 net per year.
The Hidden Costs You're Not Calculating
Most stoozing guides focus on the interest spread and forget everything else.
Interest rate risk. Bank of England base rates have been falling since late 2023. Easy-access savings accounts that were 5.2% are now 4.2%. If you're planning 2-year returns, you're betting rates stay stable. They won't. Factor in a 0.5% decline over your card's 0% period, and your effective return drops by £10–25 per card.
Opportunity cost of your time. Setting up five stoozing cards, monitoring them monthly, handling customer service when banks reject you, remembering payment dates — that's real work. If you're earning £114 from three cards over a year, your hourly rate is probably £15–20 per hour on setup and administration. That's well below what most people earn elsewhere.
Card rejections and account closures. Banks increasingly reject stoozing applications if they detect the pattern. You might be approved for one card, rejected for the second, and your second card might be closed after a few months once the bank notices the pattern. You're not earning interest on a closed account. Plan for a 20–30% rejection/closure rate on cards after your first 2–3.
Tax filing complexity. You're now reporting interest income on 3–5 accounts to HMRC. It's tedious, though not expensive if you're below the personal savings allowance.
Stoozing when rates are falling. Right now (June 2026), we're in a declining-rate environment. Stoozing returns are worse than they were 12 months ago. If you're just starting out, you're chasing yesterday's returns. This is the worst time to begin stoozing, yet it's when people get most excited about it after seeing old blog posts.
When Stoozing Actually Makes Sense
Stoozing isn't broken — it just isn't a free £500. It makes sense when:
You're comfortable with the admin. If you enjoy tracking accounts, spreadsheets, and managing multiple cards, the mental friction is low. Some people find it engaging; others find it exhausting. Be honest about which you are.
You have stable income and can prove it. Banks are skittish about stoozing. They worry (reasonably) that you'll apply for five cards, rack up 0% debt on each, then lose your job and default. New applicants get rejected; self-employed people struggle; anyone with recent credit marks gets knocked back. If you have stable employment and clean credit, you're a better candidate.
You're already earning from other banking strategies. Stoozing works best as part of a broader portfolio. If you're also switching accounts for bonuses (which are 3–10× larger than stoozing earnings per year) and using regular savers, the effort feels worth it because you're building one system that covers all three.
You're starting soon and committing long-term. The compounding works over years, not months. If you're considering stoozing, start within the next month or two while you can still access 24-month 0% cards from mainstream banks. The offers have been shrinking, and if rates fall further, they'll disappear. Once they're gone, new stoozing isn't worth starting; only keep existing cards running.
When Stoozing Doesn't Make Sense
You're just starting your personal finance journey. If you're new to banking optimization, focus on the big wins: switching accounts (£75–200 per switch, much less admin), then regular savers (guaranteed 5–7% with no credit risk). Come back to stoozing once you've mastered those.
Rates are falling or have just fallen. Stoozing returns degrade quickly in a falling-rate environment. The January–June 2026 window is already weak compared to 2024. If the Bank of England cuts rates further (likely), stoozing gets worse.
You value your mental energy. This is the honest one. One person's interesting spreadsheet is another person's overwhelming chaos. If managing multiple accounts stresses you out, the £100–200 per year isn't worth the anxiety. That's a rational decision, not a failure.
You can't pass credit checks. If you've applied for credit recently or have any marks on your file, banks will reject your applications. Stoozing requires a clean credit profile and stable employment history. Don't waste time on rejections when switching accounts (which are easier to pass) would serve you better.
The Better Alternative (Most of the Time)
Here's the math most people miss: bank switching bonuses are 3–10× better than stoozing, with less ongoing management.
- Switching accounts: £75–200 per switch, one-time effort, 2–3 hours total per account
- Stoozing: £40–70 per card per year, ongoing monitoring, rejection risk
You can switch 4–6 accounts per year, earning £300–800 in bonuses. Stoozing three cards all year gives you £120–210. The switching bonuses are larger and involve less ongoing management.
Check the live offers page to see what's available right now. Most people's time is better spent switching strategically than building a stoozing portfolio.
How to Calculate Your Own Real Stoozing Returns
If you want to stooze anyway, here's how to run the numbers honestly:
- Find a 0% card with a long interest-free period (24 months is standard, sometimes 30)
- Find a savings account with no conditions on its stated rate — or if it has conditions, verify you can meet them consistently
- Calculate gross interest: £ stoozing × (account rate ÷ 100) × (months ÷ 12)
- Deduct tax: 20% if you're a basic-rate taxpayer (most people). If you're under the personal savings allowance, you may owe nothing.
- Subtract your effort estimate: If setup took 2 hours and monthly monitoring takes 20 minutes, that's 14 hours of your time per card per year. What's your hourly rate? Subtract that "salary" from your net interest.
- Build in a 20% risk factor for card rejections, account closures, or rate changes
That's your real return. Compare it honestly to what you'd earn switching accounts or to the time you'd get back.
Common Questions
Can I stooze on a balance transfer card instead of a purchase card? Technically yes, but banks have locked this down. Most balance transfer cards now require you to move existing debt (you can't transfer from savings to a card). Some allow a "cash-like transfer," but they're rare. Stick with 0% purchase cards, which are easier to access.
What happens to my money if the card issuer goes bust? Your stoozing balance is deposited in a savings account, which is FSCS protected (up to £85,000 per account per bank). The credit card company could collapse and your savings are unaffected. Your 0% credit limit goes away, but your actual money is safe. Check the FSCS checker if you're nervous.
Do I need to pay a fee to keep the 0% card open? Most don't charge annual fees on 0% purchase cards. Some charge a fee if you carry a balance beyond the 0% period. Since you're planning to pay off the stoozing amount before the 0% ends, you shouldn't hit any fees. Read the terms — they'll be clear about this.
How many cards should I have running at once? Start with one. Once you've managed that for 3–4 months and understand the rhythm, add a second. Most people max out at 3–5 cards before rejections start hitting hard or the admin becomes overwhelming. Banks flag stoozing patterns. After a few successful cards, you'll find it harder to get approved for more.
Can I stooze if I'm self-employed? It's harder. Banks want proof of stable income, and self-employment requires 2 years of accounts or tax returns. If you're new to self-employment, you'll struggle with credit checks. If you've been self-employed for 3+ years with stable income, you have a reasonable shot.
Should I stooze if I'm planning to buy a house in the next 2 years? No. Mortgage lenders do a full credit check and assess your credit utilization. Multiple recent credit applications and high credit limits (even unused) can lower your mortgage offer or increase your interest rate. Delay stoozing until after you've completed your purchase, or don't bother with it at all.
Stoozing works. But it works at a smaller scale and requires more discipline than most guides admit. If you're considering it, run the numbers honestly against your own time and against switching bonuses. Most people are better off mastering bank switching, then layering in regular savers, then only adding stoozing if they're organised enough to maintain it long-term. Check the eligibility checker to see which switching opportunities suit you first.