5 financial mistakes that will cost you big

Money mistakes drain savings faster than you think. Some are easy to spot, others hide in plain sight. Data shows that millions of people keep repeating the same errors year after year. If you want to keep more of your income and avoid financial stress, watch out for these five common traps.

1. No emergency fund

A small shock breaks a weak plan. The Federal Reserve reports that only 63 percent of adults would cover a $400 expense with cash or its equivalent. This share has held flat.

What to do:

• Save one month of expenses first, then move toward three to six.

• Set an automatic transfer on payday.

• Keep the money in a high-yield, insured savings account for fast access.

2. Carrying credit-card balances

Interest erodes wealth fast. The average credit-card rate sat near 21 percent in May 2025. Revolving balances also ticked up in recent data.

What to do:

• Pay the statement balance in full.

• List debts by APR and attack the highest rate first.

• Ask your issuer for a lower rate and schedule automatic payments to avoid late fees.

3. Stacking Buy Now, Pay Later

BNPL feels harmless, then payments pile up. The CFPB found more than one-fifth of consumers with a credit record used BNPL in 2022, and many held multiple loans at once. A 2025 analysis links BNPL users to heavier unsecured debt.

What to do:

• Use BNPL only for planned purchases you would buy anyway.

• Track every installment date in one calendar.

• Skip BNPL for groceries and recurring bills. Those signal trouble.

4. Chasing hot tips and paying high fees

Most active funds fail to beat their index over time. In 2024, 65 percent of large-cap U.S. funds lagged the S&P 500. Costs matter and eat returns.

What to do:

• Prefer broad, low-cost index funds for core holdings.

• Keep expense ratios low. A target under 0.20 percent is a solid rule.

• Rebalance on a schedule, not on headlines.

5. Ignoring scams and weak security

Fraud losses keep rising. Consumers reported more than 12.5 billion dollars lost in 2024, a 25 percent jump from 2023.

What to do:

• Turn on two-factor authentication for banking, email, and investing.

• Use unique, long passwords with a trusted manager.

• Never pay strangers by wire, crypto, or gift card.

• Verify sellers and charities before sending money.

• Check statements weekly and dispute fast.

Keep your plan simple. Build a cash buffer. Kill high-interest debt. Stay low fee. Protect your accounts. The data backs you.