Mortgage Recasting in Canada: What It Is

Mortgage recasting in Canada is not a standard, named feature of Canadian mortgages. Recasting is a U.S. term for re-amortizing a mortgage after a large lump-sum payment so the smaller balance is spread across the months remaining on your original schedule, lowering the required payment. In Canada, lenders deliver something similar through prepayment privileges, a payment recalculation, re-amortizing at renewal, or a refinance — and the rules differ depending on your contract and whether your mortgage is insured.

What Recasting Means, and Why It's Mostly American

A recast works like this: you owe a balance, you pay down a chunk of principal, and the lender spreads the new, smaller balance across the months left on your original amortization schedule. Your interest rate stays the same, your term stays the same, and your required payment drops. Nothing else about the loan changes.

No federal or provincial rule in Canada creates a recast right. Whether your lender will do anything like it depends on your mortgage contract, your prepayment privileges, and whether the mortgage is insured. Some Canadian lenders advertise "payment recalculation" or "re-amortization" after a prepayment; many do not. Insured mortgages — those backed by CMHC, Sagen, or Canada Guaranty default insurance — face extra limits, because the insurer sets maximum amortization periods.

What Canadian Lenders Actually Offer Instead

1. Prepayment privileges

Most closed Canadian mortgages let you pay extra each year, usually a percentage of the original principal plus an increase to your regular payment. How that extra money is applied depends on your contract. Lenders typically either:

• Keep your payment the same and shorten your amortization — you finish sooner and save the most interest.
• Reduce your payment and keep your amortization roughly the same — your cash flow improves, but you save less interest.

The second option is the closest thing Canada has to a recast. Some lenders apply it automatically; others require you to ask. See mortgage prepayment privileges, explained for the mechanics.

2. Re-amortizing at renewal

At renewal, you and your lender agree on a new term and amortization. If you have paid the balance down faster than scheduled, you can often stretch the amortization back out — within lender and insurer limits — which lowers your payment. That is a genuine re-amortization, but it happens at renewal, not mid-term.

3. Refinancing

A refinance replaces your mortgage with a new one, usually with a new rate, a new term, and a longer amortization. It can lower payments and free up equity, but it means breaking the existing contract, which may trigger a penalty. See refinancing a mortgage in Canada.

Recast vs. the Canadian Options at a Glance

How a Lump Sum Actually Affects Your Mortgage

If your payment stays fixed after a lump sum, the entire extra amount goes to principal. Your balance drops, every future payment covers more principal and less interest, and you pay less total interest. That is the default treatment at most Canadian lenders, and it is usually the better financial outcome.

If instead the lender recalculates your payment down, your balance also drops, but your amortization stays about the same. You still save interest on the amount you prepaid, but you give up the compounding benefit of a shorter schedule. Weigh both in lump-sum prepayment vs higher monthly payments.

A recalculation does not change your rate. If you hold a variable-rate mortgage tied to prime, your payments still move with the Bank of Canada policy rate and your lender's prime rate, regardless of any amortization change.

Costs, Penalties, and the Fine Print

Asking your lender to re-amortize may be free, may carry an administration fee, or may not be possible mid-term. What you must avoid is accidentally triggering a penalty:

• Prepayment limits. Exceed your annual privilege and the overage can cost you a penalty, often calculated with the interest rate differential (IRD) on fixed mortgages.
• Breaking a closed term. A refinance or a lender switch mid-term breaks the contract. See interest rate differential (IRD), explained.
• Re-qualifying. Increasing your amortization or borrowing more can mean a fresh application, a fresh look at your income, credit, and GDS/TDS ratios under OSFI's Guideline B-20, and a fresh pass at the federal mortgage stress test.

When Re-amortizing Makes Sense, and When It Doesn't

Lowering your payment back down can make sense if your income has dropped, you are carrying higher-interest debt, or you want to redirect cash toward an RRSP, TFSA, or FHSA. Treated as a cash-flow tool, it is reasonable.

It rarely makes sense if your goal is to be mortgage-free sooner. Stretching the amortization back out reverses the progress you just made and increases total interest paid. If early payoff is the goal, paying off your mortgage faster is the more direct path.

Also note that a re-amortization does not change your rate. If your rate sits well above what is available today and you are weighing your options, compare a refinance against simply holding your payment where it is. Run the numbers with a mortgage prepayment calculator.

How to Ask Your Lender

Get clear answers in writing before you send extra money:

1. What are my annual prepayment privileges, and how is the limit calculated?
2. If I prepay, will my payment stay the same, drop automatically, or only change if I ask?
3. Is there an administration fee to recalculate or re-amortize my payment?
4. Can I stretch my amortization back out at renewal, and to what maximum?
5. If my mortgage is insured, what amortization limits apply?
6. What penalty applies if I refinance or break the term?

Read your mortgage documents first, then call your lender. If your mortgage is insured, confirm the amortization rules with your lender and the insurer, and ask whether any change affects your coverage.