How to prioritize UK-specific debts. Does it make more sense to pay off a 39.9% APR store card or a 6.9% student loan?

When you have an extra £100, where should it go? To answer this, we have to look beyond just the interest rate and look at legal protections and Total Cost of Debt.


The Numbers: 39.9% vs. 6.9%

Mathematically, the answer seems obvious. A 39.9% APR store card (like those from major high-street retailers or catalogues) is an emergency. For every £1,000 you owe, you are paying nearly £400 a year just in interest.

Conversely, a 6.9% Student Loan (Plan 2 or Plan 5) is effectively "cheap" debt. Because student loan repayments are tied to your income—and the debt is wiped after 30 or 40 years—it functions more like a graduate tax than a standard loan.

The Verdict: From a pure cash-flow perspective, the 39.9% store card is a "fire" that needs to be extinguished immediately. Paying off the student loan early while carrying high-interest retail debt is essentially giving money away to a billion-pound retailer.

The "Priority" Trap: Understanding UK Law

However, in the UK, the highest interest rate isn't always the highest priority. UK debt advice separates debts into Priority and Non-Priority.

  • Priority Debts: These are debts where the consequences of non-payment are severe. This includes Council Tax, Rent/Mortgage Arrears, and Energy Bills. Even if your Council Tax "interest" is 0%, a missed payment can lead to a summary warrant or bailiffs within weeks.

  • Non-Priority Debts: Store cards, credit cards, and personal loans fall here. While 39.9% is expensive, the shop cannot take your home or send you to prison for a missed payment (though they can ruin your credit score).

The 2026 Strategy: The "Step-Down" Method

If you are sitting with a mix of UK debts, follow this specific 2026 workflow to maximize your savings:

  1. Cover the Essentials: Ensure your Council Tax and Rent are paid. In the current economy, these are the only debts that can truly upend your life.

  2. Attack the 39.9% Store Card: Use the Debt Avalanche method. Pay the minimum on everything else and throw every spare pound at the store card.

  3. Check for "Breathing Space": If the 39.9% interest is drowning you, look into the UK Government’s Debt Respite Scheme. This gives you 60 days where interest and fees are frozen, allowing you to catch up.

  4. Ignore the Student Loan (For Now): Unless you are a very high earner likely to pay off the full balance before it is cancelled, making extra voluntary payments to the Student Loans Company is generally considered a poor move by UK financial experts.


Summary Table: Which Debt Wins?

Debt TypeTypical UK APR (2026)Priority LevelAction Plan
Council Tax0% (but high penalties)CRITICALPay First.
Store Card34.9% – 44.9%High (Cost)Pay Second.
Credit Card22% – 29%Medium (Cost)Pay Third.
Student Loan6.9% – 7.3%LOWPay Last (or never).

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