3 expenses you should never charge to your credit card

Credit cards are convenient. They’re widely accepted, offer cashback or rewards, and can even help build a credit score when used responsibly. But they also come with a financial trade-off that isn’t always obvious—especially when used to pay for big-ticket or high-risk costs.

The reality is that certain types of spending, when charged to your credit card, can quietly accumulate fees, interest, or psychological detachment from your budget. And in today’s cost-of-living climate—where every percentage point of debt matters—being strategic about which expenses not to put on your credit card can protect your long-term financial resilience.

Here’s a breakdown of three categories you should think twice about—plus practical alternatives for staying in control of your cash flow.

1. Education Expenses: A Credit Trap in Disguise

In Singapore, diploma programs at private institutions can cost upwards of S$10,000 a year. While many schools and universities now accept credit card payments, this option can mask steep financing charges. Most cards charge 3%–3.5% monthly interest on unpaid balances. That translates to more than 50% annually—higher than most private loan rates or even some payday lenders.

If you’re relying on your credit card to fund tuition, you're essentially taking on high-interest unsecured debt for something that typically doesn’t yield an immediate return. Even promotional plans that offer “zero interest” may only do so for a short tenure, with steep penalty interest if you miss a payment.

What to consider instead:

If you’re a student or parent facing funding gaps, explore dedicated education loan options with capped interest rates and repayment flexibility. In Singapore, this may include the MOE Tuition Fee Loan for polytechnic and university students, or commercial education loans with longer tenures and lower effective interest than credit cards.

2. Gambling Expenses: A High-Risk Financial Spiral

Let’s be clear: gambling with a credit card is a financial red flag.

Casinos, sports betting sites, and online gaming platforms may accept credit cards, but many banks classify these as cash advances—with instant fees and higher interest rates than retail purchases. This means you’re charged from the day of the transaction, with no grace period.

On top of that, gambling transactions often do not earn rewards points and may trigger additional processing fees. Some card issuers even flag this as high-risk behavior, which could impact your creditworthiness if you’re applying for a mortgage or personal loan later.

More importantly, gambling itself is a known addictive behavior. The Diagnostic and Statistical Manual of Mental Disorders (DSM-5) recognizes gambling disorder as a behavioral addiction akin to substance abuse. When you charge gambling-related expenses to your credit card, you're compounding financial risk with emotional volatility.

What to consider instead:

If you’re struggling with gambling, seek professional support. Singapore’s National Council on Problem Gambling (NCPG) offers helplines and exclusion tools. For those facing debts linked to gambling, a structured debt repayment plan or speaking to a licensed credit counsellor may be a more sustainable option.

3. Medical Expenses: A Slippery Slope Into Debt

Unexpected medical bills can be financially destabilizing, especially in emergencies. However, turning to your credit card to pay for large hospital bills should be a last resort—not a first line of defense.

Credit cards are not designed to offer flexible repayment terms on essential needs. They carry compounding interest and may cause long-term damage to your credit score if you’re unable to pay the balance in full each month. For example, a S$8,000 surgery charged to your card with a 25% annual interest rate can snowball into S$10,000 within a year—even if you’re making partial payments.

This risk is amplified if your medical condition limits your ability to work or earn income, further reducing your capacity to manage the debt.

What to consider instead:

Start by using MediSave and employer-provided health benefits. For bills beyond CPF coverage, explore government support schemes such as MediFund or the Chronic Disease Management Programme (CDMP). If you need to borrow, a low-interest medical loan or a personal instalment plan from a bank is often cheaper than revolving credit card debt.

Why Credit Card Surcharges Matter More Than Ever

Many consumers underestimate the hidden fees tied to credit card use. These can include:

• Merchant surcharges: Some businesses pass on a 2–3% fee when you pay by credit card.
• Foreign transaction fees: Typically 2.5–3.5% for overseas or cross-border online purchases.
• Cash advance charges: Instant interest and withdrawal fees, often with no rewards.
• Penalty interest: If you miss a payment, interest can spike to 28% or higher depending on issuer terms.

Taken individually, these fees may seem small. But over months or years, they reduce your effective savings rate—and worse, they often go unnoticed until the debt becomes burdensome.

The goal is not to eliminate card use entirely but to align payment methods with the type of expense. Here’s how you can reduce reliance on high-cost credit while maintaining everyday convenience:

• Use NETS or debit cards for daily spending: These deduct directly from your bank account and typically don’t carry transaction fees.
• Book travel using miles or vouchers: If you’ve accumulated rewards points or flight miles, use them instead of paying with credit—especially for airlines or hotels that tack on surcharges.
• Use government subsidies or employer benefits: Whether for medical care, training courses, or transport, explore co-payment schemes and subsidies first.
• Consolidate payments via PayPal or direct debit: Some merchants waive surcharges for PayPal-linked bank payments or recurring bank debits instead of card charges.
• Shop around for 0% interest installment plans: If you must use credit, look for true interest-free plans that don’t charge processing fees or require a minimum spend.

When considering whether to use your credit card, pause and ask:

• Is this purchase essential—or can I delay until I have the funds?
• Will I pay the balance in full this month, or am I borrowing into next month’s budget?
• Are there cheaper funding alternatives—like savings, insurance, or subsidies?
• Am I aware of any extra fees or surcharges being applied?

These small moments of reflection can protect you from unplanned debt accumulation. In many cases, your debit card or an installment loan may serve the same need—without the compound interest trap.

Used responsibly, credit cards can offer convenience and rewards. But they are not designed for emergencies, emotional spending, or structural needs like tuition or medical care. When you treat your credit card like a cashflow buffer or loan substitute, you expose yourself to long-term financial strain—even if the monthly minimum feels manageable.

Surcharges, hidden fees, and compounding interest can quietly undo months of savings or budgeting discipline. That’s why planning your payment method isn’t just about the swipe—it’s about understanding which tools are meant for which expenses.

If you’re building financial resilience in a high-cost environment, start by removing the quiet traps. Because over time, the smartest strategy isn’t avoiding debt entirely—it’s knowing which debt will serve you, and which will slowly sink you.