Second Mortgage
Hypothèque de deuxième rang in French
Quick definition
A second mortgage is a loan secured by your home and registered behind your existing first mortgage. Because the second lender only gets paid after the first if things go wrong, rates are much higher, and most second mortgages come from private or alternative lenders.
Rank determines everything
Mortgages are registered against a property in order, and that order decides who gets paid first from a sale or a default. Your main mortgage holds first rank; a second sits behind it, and in a forced sale the first lender is paid in full before the second sees a dollar.
That leftover position is risky, and the pricing shows it. Second mortgage rates commonly run from about 8% to 15% or more (as of July 2026), mostly from private and alternative lenders, plus fees. How much you can borrow depends on your home equity: lenders typically cap the first and second combined at 75% to 80% of the home's value.
When a second mortgage makes sense
A second mortgage is rarely the cheapest money available, so it earns its place only when the better options are blocked.
- You cannot qualify to refinance the first. Bruised credit or hard-to-prove income can rule out a bank refinance while a private lender still says yes.
- Breaking the first would cost too much. Mid-term, a large interest rate differential penalty can make refinancing more expensive than layering a small second behind an excellent first rate.
- A short-term bridge. A defined, temporary need with a clear repayment date, where speed matters more than rate.
The exit plan is the real product
The plan for getting out matters more than the loan itself. The usual exit is rolling the second into the first mortgage at mortgage renewal, when refinancing no longer triggers a penalty. A second mortgage with no exit plan simply becomes expensive permanent debt.
Second mortgage vs. HELOC vs. refinancing
A HELOC is usually also registered in second rank, but it comes from your own bank at prime-plus pricing, and it requires you to qualify on income, credit, and the stress test. When you qualify, a HELOC beats a private second mortgage on cost every time.
Mortgage refinancing is generally the cheapest way to borrow a large amount against the home, again when you qualify and when the penalty to break is manageable. The private second mortgage is the last resort in this lineup: the option that says yes when the others say no, and charges accordingly.
Read the fine print
The rate is only part of the cost. Before signing, look hard at four things.
- Fees. Broker fee, lender fee, and legal costs often total 2% to 4% of the loan and are typically deducted from the advance, so you receive less than you borrow.
- Short terms. Most private seconds run 1 year, often interest-only. At maturity you must repay, refinance, or renew.
- Renewal fees. Renewing for another year usually means paying lender and broker fees all over again.
- Default risk. A second lender can enforce against your home just as a first lender can. Missing payments on a high-rate loan secured by your house is how people lose houses.
In Canada
In Québec, a second mortgage is called a « prêt de deuxième rang ». Like all Québec mortgages (legally, hypothecs), it must be set up by notarized deed, so a notary is involved in registering the loan and in the eventual payout.
Private mortgage lending is provincially regulated, and the licensing rules for brokers vary by province. Whoever arranges the loan, get independent advice before pledging your home for a high-rate loan.
Worked example
Marc owes $380,000 on a first mortgage at a low fixed rate with 14 months left, on a home worth $600,000. He needs $50,000 to consolidate high-interest debts, but breaking the first would trigger a large penalty, and his bank declines a HELOC because of a recent credit stumble.
A broker arranges a $50,000 second mortgage at 11% for a 1-year term, interest only (all figures illustrative): about $458 per month, plus roughly $3,000 in fees deducted from the advance. His exit plan is set from day one: at renewal in 14 months, roll the $50,000 into the first mortgage penalty-free. The second was expensive, but cheaper than the credit card interest it replaced and cheaper than breaking the first.
Reviewed by Alexandre Bernier, CFP®, CIM®, PFP®·Updated July 2026