For most people, credit card debt is a financial trap—a cycle of high interest rates and mounting balances that can take years to escape. But for a disciplined minority of savers, the right credit card isn’t a liability. This proves a tool for arbitrage. This strategy, known as “stoozing,” involves borrowing money at 0% interest and placing those funds into a high-yield savings account to pocket the difference.
Martin Lewis, the founder of MoneySavingExpert and one of the UK’s most trusted voices in personal finance, has long highlighted stoozing as a viable way to generate “free” money. While the practice has existed for years, it has regained significant traction as central banks have raised interest rates to combat inflation, widening the gap between the cost of borrowing on promotional credit cards and the returns available in easy-access savings accounts.
At its core, stoozing is a game of timing, and discipline. It allows a consumer to use the bank’s money to earn interest for themselves, provided they can navigate the strict terms of the promotional period. However, as Lewis often cautions, this is not a strategy for those struggling with debt or those prone to impulsive spending; it is a calculated maneuver for the financially stable.
The Mechanics of the Stooze
Stoozing does not involve taking a cash advance—which typically incurs immediate high interest and fees—but rather leveraging 0% introductory offers on purchases or balance transfers. The process generally follows a specific sequence of events to ensure the borrower remains in the “green.”
First, a consumer secures a credit card with a 0% introductory period on purchases, often lasting between 12 and 21 months. Instead of paying for their daily expenses with cash, they charge those necessary costs to the card. The cash that would have been spent is instead diverted into a high-interest savings account or a cash ISA.
Throughout the promotional period, the stoozer makes only the minimum monthly payments required by the credit card provider, using a minor portion of the savings account to do so. The bulk of the capital continues to accrue interest. As the 0% window nears its expiration, the borrower withdraws the lump sum from the savings account to pay off the credit card balance in full, keeping the accumulated interest as profit.
Comparing the Outcomes: Standard Spending vs. Stoozing
To understand the impact, consider a consumer with £5,000 intended for necessary annual expenses. In a standard scenario, that money is spent and gone. In a stoozing scenario, the money works for the consumer.
| Strategy | Cash Outflow | Interest Earned | Net Position |
|---|---|---|---|
| Standard Spending | £5,000 | £0 | -£5,000 |
| Stoozing (0% Card) | £5,000 | ~£250 | -£4,750 |
The Critical Risks and Constraints
While the math is straightforward, the execution is where many fail. The primary danger of stoozing is the “cliff edge”—the moment the 0% promotional period ends and the card reverts to its standard Annual Percentage Rate (APR), which can often exceed 20% or 30%.
If a borrower fails to pay off the balance before the deadline, the interest charges can instantly wipe out any gains made in the savings account. Missing a single minimum monthly payment typically triggers an immediate cancellation of the 0% offer, plunging the borrower into high-interest debt.
Beyond the interest rates, there are systemic risks to consider:
- Credit Score Impact: High credit utilization (using a large percentage of your available limit) can temporarily lower your credit score, which may affect your ability to secure a mortgage or other loans in the short term.
- Spending Creep: There is a psychological risk that seeing a large balance in a savings account encourages “lifestyle creep,” leading the borrower to spend the money they should be reserving for the card payoff.
- Availability: Not everyone qualifies for the longest 0% periods. These offers are typically reserved for those with excellent credit histories.
Who Should (and Should Not) Stooze?
The stakeholders in this strategy are primarily the disciplined middle-class savers who have a surplus of cash and a high credit rating. For these individuals, stoozing is a low-risk way to optimize their liquid assets. It turns a passive savings approach into an active one.
Conversely, stoozing is dangerous for anyone who views it as a way to “get ahead” while already carrying high-interest debt. If you are paying 20% interest on one card, it is mathematically illogical to earn 5% interest in a savings account using another card. The priority must always be the eradication of existing high-interest debt before attempting arbitrage.
For those interested in exploring these tools, Martin Lewis recommends utilizing the comparison tools available at MoneySavingExpert to find the current market-leading 0% cards and the highest-paying savings accounts, as these rates fluctuate frequently based on central bank policy.
Disclaimer: This article is for informational purposes only and does not constitute financial advice. Credit products carry risks, and failure to manage them can lead to significant debt and damage to your credit rating. Consult with a certified financial advisor before making significant changes to your financial strategy.
The viability of stoozing will remain tethered to the decisions of the Bank of England and the Federal Reserve. As inflation trends stabilize, the next major checkpoint will be the upcoming quarterly interest rate reviews, which will determine whether savings rates remain high enough to justify the effort and risk of maintaining 0% credit balances.
Do you use stoozing to maximize your savings, or do you find the risk too high? Share your experience in the comments below.
