Introduction
You may need money for a surprise cost. Your car breaks down. Your laptop stops working. You need money fast, but you do not need a huge loan. A line of credit can help in this kind of moment. It is a flexible way to borrow money in Canada. You borrow only what you need. You pay interest only on what you use. This guide will explain it in very simple words.
What It Is
A line of credit is a loan with a set limit. A limit is the most money you can borrow. The bank sets that limit for you. You can borrow some of it, all of it, or none of it. You can borrow, pay it back, and borrow again. That is why people call it revolving credit. Revolving means it goes around again and again. It is not like a normal loan. A normal loan gives you all the money at once. Then you pay it back in fixed monthly payments. A line of credit is different. You take money only when you need it. You pay interest only on the money you took out. Interest is the extra money you pay for borrowing. You pay no interest on money you did not use. That is the big idea. It is a tool for short, flexible borrowing. It is not free money. Every dollar you take out must be paid back, with interest.
How It Works
First, you apply at a bank or a credit union. A credit union is a small bank owned by its members. The lender looks at your income, your other debts, and your credit score. A credit score is a number that shows how well you have paid loans before. Learn what a credit score is in Canada before you apply. A higher score often means a lower rate and a higher limit.
Next, the lender gives you a limit. A personal line of credit often has a limit of a few thousand dollars. It can be $5,000, $10,000, or more. You can take money out by moving it to your chequing account. A chequing account is your everyday bank account. You can also use an ATM or pay a bill online.
Then interest starts. Interest starts on the day you take money out. There is no free grace period, like the one on credit card purchases. A grace period is a short time with no interest. Interest is charged every day on the money you owe. Most lines of credit in Canada have a variable rate. A variable rate can go up or down. It is often written as prime plus a number. Prime rate is the base rate banks use for their best loans. For example, your rate may be prime plus 5%. If prime is 4.70%, your rate is 9.70%. In late 2026, big banks in Canada had a prime rate of 4.70%. That number can change, so always check the real rate before you borrow. Your rate is usually much lower than a credit card rate. Credit card rates in Canada are often close to 20%. Read our guide on how credit card interest works in Canada to see the difference.
There are two main kinds. The first kind is unsecured. Unsecured means no asset is tied to the loan. An asset is something valuable you own, like a house or a car. With an unsecured line, the lender trusts your income and your credit score. The rate is often higher, because the lender takes more risk. The second kind is secured. Secured means an asset backs the loan. If you stop paying, the lender can take steps to sell that asset. A secured line often has a lower rate and a higher limit.
The most common secured line in Canada is a HELOC. HELOC means Home Equity Line of Credit. Home equity is the part of your home you truly own. It is your home value minus your mortgage. A mortgage is a big loan to buy a home. With a HELOC, your home is the security. You can borrow up to 65% of your home value on the revolving line. Your mortgage plus your HELOC together cannot go over 80% of your home value. These are federal rules for banks in Canada. To get a HELOC, you need at least 20% equity if it is combined with a mortgage. You need more than 35% equity for a standalone HELOC. A standalone HELOC is a HELOC on its own, with no mortgage at the same lender. You must also pass a stress test, just like for a mortgage. A stress test is a hard check to see if you can still pay when rates go up. Read our simple guide on how a mortgage works in Canada to learn more.
You must also make a minimum payment each month. On most personal lines of credit, the minimum payment is only the interest for that month. That is a trap. If you pay only the interest, your loan never goes down. The Financial Consumer Agency of Canada, or FCAC, says this clearly. FCAC is the federal body that protects people who use banks and lenders. Pay more than the minimum when you can.
An Example With Numbers
Say you have a line of credit with a limit of $10,000. Say your rate is 8% a year. This 8% is only an example rate, not a rate for you. Say you take out $3,000 to fix your car. You pay interest only on that $3,000, not on the full $10,000. Your interest for one month is $3,000 times 8%, divided by 12 months. That is $240 a year, divided by 12. That is $20 a month. So your minimum payment is about $20 that month. If you pay only $20, your loan stays at $3,000. That is how a line of credit can last for years.
Now say you pay $100 each month instead. In the first month, $20 is interest and $80 goes to the loan. Your loan drops from $3,000 to $2,920. Next month, your interest is a little less, because you owe a little less. That is the smart way to use a line of credit. Borrow only what you need, and pay more than the minimum.
Here is a short HELOC example too. Say your home is worth $600,000. Say you still owe $300,000 on your mortgage. First, 65% of $600,000 is $390,000. Next, 80% of $600,000 is $480,000. Take away your $300,000 mortgage, and you get $180,000. Your HELOC limit is the lower of the two numbers. So the most you could borrow on the HELOC is $180,000.
Common Mistakes
One big mistake is to treat the limit as free money. A $10,000 limit is not $10,000 of extra income. It is $10,000 of debt you can take on. Use it only for a real need. A second mistake is to pay only the minimum each month. The minimum is often interest only, so the loan never shrinks. A third mistake is to use a line of credit for daily spending. If you use it for food, clothes, and fun, the debt grows fast. Keep it for a real surprise cost. A fourth mistake is to use a HELOC like a cash machine. Your home is the security. If you cannot pay, you can lose your home. A fifth mistake is to forget that the rate can change. Make sure you can still pay if the rate rises by 2% or more. Before you borrow, keep some cash safe for small surprises. Read our guide on how much cash to keep in an emergency fund first.
Final Thoughts
A line of credit is a simple tool, but it needs care. You borrow only what you need, you pay interest only on what you use, and you can borrow again after you pay it back. That flexibility is useful. It is also risky, because the minimum payment is often interest only, and the rate can go up. Use it for a short, real need. Pay more than the minimum. Never borrow against your home for fun. If you use it with a clear plan, a line of credit can help you through a hard month.
Quick Questions
What is a line of credit in simple words?
It is a loan with a set limit that you can borrow from, pay back, and borrow from again. You pay interest only on the money you actually take out.
Do I pay interest on the full limit of a line of credit?
No. You pay interest only on the money you have taken out. If you take out nothing, you pay no interest.
What is the difference between a personal line of credit and a HELOC?
A personal line of credit is usually unsecured, with no asset behind it. A HELOC is secured by your home, so it often has a lower rate and a higher limit, but your home is at risk if you cannot pay.
Disclaimer: This article is for educational and informational purposes only and does not constitute financial advice.
Sources: Financial Consumer Agency of Canada, Home equity lines of credit — https://www.canada.ca/en/financial-consumer-agency/services/mortgages/home-equity-line-credit.html ; Financial Consumer Agency of Canada, Borrowing against home equity — https://www.canada.ca/en/financial-consumer-agency/services/mortgages/borrow-home-equity.html ; FCAC line-of-credit basics as summarised at https://creditlab.ca/learn/what-is-a-line-of-credit and https://www.financesforyou.ca/learn/debt/how-a-line-of-credit-works-canada ; HELOC limits and prime rate at https://wealthnorth.ca/mortgages/refinancing-and-home-equity/heloc/ and https://www.8twelve.ca/blog/heloc-canada