Blog/Education

10 Common Savings Mistakes That Cost You Money

These mistakes might be costing you hundreds or thousands of dollars a year. Here's how to identify and fix them.

By SideBySide Editorial9 min readJanuary 2026

1 Keeping Money at Traditional Banks

Chase, Bank of America, and Wells Fargo pay 0.01% APY. Online banks pay 4%+. On $25,000, that's $1,000/year you're giving away.

Fix: Open a high-yield savings account today. The switch takes 15 minutes.

2 Chasing Promotional Rates

"5.50% APY!" expires in 90 days, then drops to 0.50%. The math shows a steady 4% beats these bait-and-switch offers.

Fix: Choose accounts with consistent, unconditional rates.

3 Falling for Tiered Rate Traps

Banks advertise "up to 5% APY" but only pay it on balances above $5,000 or $10,000. Below that, you earn 0.25%.

Fix: Look for flat-rate accounts that pay the same APY on every dollar.

4 No Emergency Fund

Without savings, unexpected expenses go on credit cards at 20%+ APR. An emergency fund prevents debt spirals.

Fix: Start with $1,000, then build to 3-6 months of expenses.

5 Too MUCH in Savings

Once you have 6-12 months of expenses, extra cash should be invested for higher returns. Savings accounts aren't wealth-building tools.

Fix: Keep emergency fund in savings, invest the rest for long-term growth.

6 Ignoring FDIC Limits

FDIC insures $250,000 per depositor, per bank. More than that? You're uninsured and could lose money if the bank fails.

Fix: Use accounts with extended FDIC coverage or split across banks.

7 Paying Monthly Fees

Some banks charge $5-25/month for accounts. Every online bank worth considering charges $0. Don't pay for the privilege of storing money.

Fix: Switch to a no-fee account immediately.

8 Rate Shopping Too Often

Switching banks every month for 0.1% more APY isn't worth the hassle. Pick a good account and stick with it.

Fix: Only switch for meaningful differences (0.5%+) or better features.

9 No Automatic Transfers

"I'll save what's left over" means you'll save nothing. People who automate save more consistently.

Fix: Set up automatic transfers to savings on payday.

10 Mixing Savings Goals

One big savings balance makes it hard to track progress. Is that $15,000 your emergency fund or vacation money?

Fix: Use savings buckets (Ally) or separate accounts for each goal.

The Costliest Mistake

By far, the most expensive mistake is keeping money at traditional banks earning 0.01% when you could earn 4%+. This single change can put $1,000+ back in your pocket annually—with zero additional effort after the initial switch.

Every other optimization is secondary. Get your money into a high-yield account first, then fine-tune from there.

Stop leaving money on the table

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