Two people with identical debt and identical income can take wildly different lengths of time to clear it. The difference is rarely willpower. It's usually the order they paid things in.
What's the fastest way to pay off debt?
Mathematically, paying the highest interest rate first — the avalanche method — clears debt fastest and costs the least. Psychologically, paying the smallest balance first — the snowball method — produces early wins that help people keep going. The best method is the one you'll actually complete.
Avalanche vs snowball
| Avalanche | Snowball | |
|---|---|---|
| Order | Highest interest rate first | Smallest balance first |
| Total cost | Lowest | Higher — you pay more interest |
| Time to clear | Shortest | Slightly longer |
| First win | Can take a long time | Often within weeks |
| Best for | People motivated by numbers | People who need visible progress |
Both work. The gap in total cost is usually smaller than people expect, and it's dwarfed by the cost of abandoning either one halfway. If you've stalled on debt before, the snowball's early wins are worth more than the interest they cost.
The mechanics, either way
- List every debt — balance, interest rate, minimum payment. Most people have never seen this on one page, and it's usually less overwhelming written down than carried around.
- Pay minimums on everything. Missed payments trigger fees and damage your credit, which makes everything more expensive.
- Put every spare pound at one target debt — whichever your chosen method picks.
- When it clears, roll that entire payment onto the next one. This is the part that accelerates: your payment grows each time a debt disappears while your income stays flat.
- Repeat until finished.
Why a small buffer comes first
Counterintuitive but important: before attacking debt aggressively, set aside a small cash buffer.
Without one, the first unexpected expense goes straight onto a credit card, undoing months of progress and eroding your belief that the plan works. A modest buffer breaks that cycle — the reasoning is the same as in why an emergency fund comes first.
Debt vs investing
A common question with a fairly clean answer. Paying off debt at 18% is a guaranteed 18% return. No investment offers that with certainty, so high-interest debt beats investing nearly every time.
Low-interest debt is different — a long-term loan at a low rate may reasonably run alongside investing. The exception in both cases is an employer retirement match: that's an immediate return you shouldn't decline while clearing debt. More on the arithmetic in compound interest, which works against you here at speed.
Things that quietly help
- Ask for a lower rate. Credit card issuers sometimes reduce rates for customers who ask and have paid reliably. Costs one phone call.
- Consolidation or balance transfers can cut interest substantially — but check the fees, the rate after any promotional period, and whether you'll simply re-use the cleared card.
- Automate the payment on payday so it happens before the money is available to spend.
- Free debt-advice services exist in most countries and are genuinely useful. Use them early; people typically wait far too long.
The part nobody mentions
Debt carries shame, and shame makes people avoid looking at the numbers — which makes everything worse. Not opening the statements is a predictable response to feeling bad, and it's the single most expensive habit in this whole area.
Treat it as arithmetic rather than a verdict on you. The plan works the same whether you feel good about it or not.
Frequently asked questions
Snowball or avalanche — which should I pick? Avalanche if you're comfortable with slower early progress. Snowball if you've lost momentum before. Completion matters more than optimisation.
Should I close cards after paying them off? Not automatically — closing accounts can affect your credit utilisation and history. If the temptation to re-spend is real, remove the card from your wallet and saved payment details instead.
Is consolidation a good idea? Sometimes. It helps when it genuinely lowers your rate and you don't re-accumulate on the cleared accounts. It hurts when it extends the term at a similar rate.
Clearing high-interest debt is the highest-certainty return available to most people — better than any market. Once it's gone, budgeting and investing are the next steps. More in the Make Money guides.
General education, not financial advice. Consider a qualified adviser or a free debt-advice service for guidance on your specific situation.