What You'll Learn
- ✅ What banks actually do with your deposits
- ✅ How the "interest spread" makes banks billions
- ✅ All the fees banks charge (and how to avoid them)
- ✅ Why credit cards are a bank's favourite product
- ✅ How to make banks work for YOU instead
🏦 Your Money Doesn't Sit in a Vault
When you deposit $100 into a bank, most people imagine their cash sitting in a box in a big vault somewhere. Nope. The bank takes most of your money and lends it to other people.
Mortgages, car loans, credit cards — all of that money originally came from people like you who deposited their savings. The bank is basically a middleman: they take your money, lend it to someone else, and charge that person interest for borrowing it.
That interest is how banks make most of their money. They're using YOUR money to earn THEIR profits. And they give you a tiny cut of it (your savings account interest) as a thank-you for letting them use it.
📊 The Interest Spread
Here's the magic trick that makes banks incredibly profitable. The bank pays you a small interest rate on your savings, then charges someone else a much higher interest rate when they borrow. The difference between those two rates is called the interest spread, and it's where the big money is.
How a Bank Makes Money on Your $1,000 Deposit
Now multiply that by millions of customers, each depositing thousands of dollars. That's billions in profit every single year.
🧾 Fees, Fees, Fees
Interest isn't the only way banks make money. They also charge fees for all sorts of things — and those fees add up to billions in extra profit every year.
Monthly account fees
Just for having an account
ATM fees (other banks)
Using another bank's machine
Overdraft fees
Spending more than you have
NSF (bounced payment) fees
A payment goes through but you don't have the money
Foreign exchange markup
Buying anything in another currency
Credit card interest
Not paying your full balance each month
💳 Credit Cards: The Bank's Favourite Product
Banks love credit cards. Here's why: every time you don't pay off your full balance, they charge you around 20% interest. That's a better return than almost any investment on earth — and it's basically guaranteed.
But that's not all. Every single time you tap your credit card at a store, the bank also earns 1.5% - 2.5% from the merchant. This is called an "interchange fee" — the store pays the bank a cut of every purchase.
This is why banks give you rewards, cashback, and points. They're making money on every single transaction, whether you pay interest or not. The rewards are just a way to get you to use the card more often.
🎯 Why Banks Want You as a Customer
Here's something interesting: the younger you are, the more valuable you are to a bank. Why? Because if they get you as a customer at 15 years old, there's a good chance you'll bank with them for the next 60+ years.
That's 60 years of deposits to lend out, 60 years of fees, 60 years of credit card transactions. You'll get a mortgage, car loans, investment accounts — all with them. One teenager could be worth hundreds of thousands of dollars in lifetime profit.
This is exactly why youth accounts are free, why banks visit schools, and why they offer student deals. They're investing in you now because they know they'll make it all back (and then some) over the decades.
💪 How to Make Banks Work for YOU Instead
Banks are designed to make money off you, but that doesn't mean you can't flip the script. Here's how to use banks to your advantage instead of theirs:
Use free accounts
Youth accounts are free until you're 18-25 depending on the bank. After that, look at online-only banks like EQ Bank or Simplii that have no monthly fees.
Earn the highest interest possible
Don't leave your savings in a big bank earning 0.5%. High-interest savings accounts (HISAs) at online banks pay 3-4%+. Your money should be making money.
Avoid ALL unnecessary fees
Use your own bank's ATMs, never overdraft, keep enough money to avoid minimum balance fees. Every fee avoided is money in your pocket.
Use credit cards for rewards — but pay in full
When you're old enough, use a cashback credit card for purchases and pay the FULL balance every month. You get free rewards and the bank makes nothing from interest.
Never pay interest if you can help it
Interest is the bank's favourite source of profit. Every dollar of interest you avoid paying is a dollar that stays in your pocket instead of theirs.
🤯 Did You Know?
Canada's Big 5 banks made over $50 billion in profit in 2023. Your monthly fee is a drop in their ocean. That's why it's worth shopping around — they need you way more than you need them.
❌ Don't
Stick with whatever bank your parents picked for you without ever comparing options. Loyalty to a bank that charges you fees every month isn't loyalty — it's just expensive.
✅ Do
Compare banks, look for free accounts, chase the best interest rates, and use credit cards strategically. Treat banking like a tool, not a relationship.
💬 Real Talk
Banks aren't evil, but they're not your friend either. They're businesses designed to maximize profit — and a lot of that profit comes from people who don't understand how banking works. Now that YOU understand it, you can make smarter choices, avoid unnecessary fees, and keep more of your money where it belongs: in your pocket.