Quick answer: A second mortgage is a loan secured by your home that sits behind your existing mortgage. You keep your first mortgage, its rate and its term, and borrow part of your remaining equity on top. In BC, most lenders allow your two mortgages together to reach about 80% of your home's value, sometimes a little more. Seconds cost more than first mortgages and usually have short terms, so they work best as a bridge to a clear plan.
Clients ask me about second mortgages for very practical reasons: a tax bill, a renovation, a spousal buyout, or high interest debt that is eating their budget. This guide explains how a second mortgage works, what it really costs and when another option is smarter.
What is a second mortgage?
A second mortgage is a separate loan registered on your property title behind your first mortgage. If the home is ever sold, the first lender is paid in full before the second lender receives anything. Because the second lender takes more risk, the interest rate and fees are higher than on your first mortgage.
Your first mortgage does not change. You keep paying it as before, and you make a separate payment on the second.
How much can you borrow with a second mortgage?
Lenders look at your combined loan to value, which is your first mortgage balance plus the new second, divided by your home's appraised value.
| Example | Amount |
|---|---|
| Appraised value of your home | $1,000,000 |
| Combined limit at 80% | $800,000 |
| Balance on your first mortgage | $550,000 |
| Maximum second mortgage before fees | about $250,000 |
This example is illustrative. The real limit depends on the property, its location, your credit, your income and the lender.
Who lends second mortgages in BC?
- Banks and credit unions rarely offer a stand alone second mortgage. They usually prefer a home equity line of credit behind their own first mortgage.
- B lenders and trust companies sometimes offer seconds to borrowers with good equity and income they can document.
- Private lenders and mortgage investment corporations provide most second mortgages. They focus on equity and your exit plan more than on your credit score. Our page on private lenders in BC explains how they work.
What does a second mortgage really cost?
The interest rate is only part of the cost. A private second usually includes:
- a lender fee, often deducted from the money you receive;
- a broker fee, when one applies;
- a lawyer or notary to register the mortgage;
- an appraisal of your home.
Fees reduce the cash you actually get. As an illustration, a $50,000 second with $3,500 of total fees puts $46,500 in your hands, while interest is charged on the full $50,000. That is why the annual percentage rate, which includes the fees, matters more than the headline rate.
In Canada, charging more than 35% APR is a criminal offence for most consumer loans since January 1, 2025. In BC, the Mortgage Services Act also requires your broker to give you written disclosure of the costs and risks before you commit. I give every client the full APR, term, fees and renewal terms in writing before anything is signed.
Why do people take a second mortgage?
- To keep a low first mortgage rate. If your first mortgage has a low rate and breaking it would trigger a large penalty, a second can be cheaper for a short period.
- To consolidate high interest debt into one payment while you rebuild.
- To pay a CRA tax bill and stop a lien or collection action.
- To buy out a former spouse while keeping the existing first mortgage.
- To bridge a gap between buying and selling. See our guide to bridge loans in BC.
- To avoid trouble after a consumer proposal or credit setback. See our bad credit mortgage guide.
When is a second mortgage a bad idea?
A second mortgage is expensive money. It is a poor fit when you need the funds for many years, when the payments would stretch your budget, or when there is no realistic way to repay or refinance at the end of the term. In those cases, refinancing your first mortgage, a home equity line of credit, or a different plan may cost far less. A home equity line of credit from a bank is limited to 65% of your home's value for the revolving part, according to federal rules, so it does not always free up enough money.
What is your exit strategy?
Every private second needs a way out, and lenders will ask about it. Common exits are:
- refinancing everything into one first mortgage once your credit or income improves;
- selling the property;
- paying the second off from a bonus, inheritance or business income.
Renewal of a private second is not guaranteed and usually comes with new fees. Some contracts renew automatically at a higher cost, so read the renewal clause carefully. I build the exit plan before we apply, not after.
What documents will you need?
- photo identification;
- your most recent mortgage statement and property tax notice;
- proof of home insurance;
- income documents, if you have them;
- details of the debts or costs the second will pay.
What are the key takeaways?
- A second mortgage keeps your first mortgage in place and borrows against the remaining equity.
- Most lenders cap your combined borrowing at about 80% of your home's value.
- Compare the APR including fees, not just the rate.
- Have a written exit plan before you sign.
Every situation is different. Book an appointment and I will compare a second mortgage, a refinance and a line of credit for your numbers, with the full costs in writing.
What other questions do readers ask?
Does my first mortgage lender need to approve a second mortgage?
Usually not, but some first mortgages say you cannot register another charge without the lender's consent, and a few treat it as a default. We read your current mortgage terms before we arrange anything.
Can I get a second mortgage with bad credit?
Often, yes. Private second mortgage lenders look mainly at your equity and your plan to repay. Your credit still affects the cost and the amount, but a low score is not an automatic no.
How long does a second mortgage last?
Most private seconds have short terms, commonly six months to two years, and many are interest only. Plan your exit before you sign, because renewal is not guaranteed.
Is a second mortgage better than refinancing?
It depends on the penalty to break your first mortgage and the rate on it. If your first mortgage has a low rate and a large penalty, a second can cost less overall for a short period. If you need the money for years, refinancing is usually cheaper.
Can I pay off a second mortgage early?
Many private seconds allow payment after a minimum period, but some charge a few months of interest or a fee. The disclosure you receive before signing must show these terms.
Where do these numbers come from?
- Criminal Code, section 347 (criminal rate of interest, 35% APR since January 1, 2025)
- Canada Gazette: Criminal Interest Rate Regulations
- BCFSA: Mortgage Services Act disclosure FAQs
- Financial Consumer Agency of Canada: home equity lines of credit
- Mortgage Professional Canada: the fine print that can turn a 6% private loan into 14%
Published November 5, 2026. This article is general information, not personal financial advice. Rates and programs change, and every approval depends on your full application. Asim Ali is a licensed mortgage broker with Dominion Lending Centres A.I.M.I. Collective Mortgage Group.