HomeLife Frontier Realty Inc., Brokerage Joonghyun Ahn, Sales Representative

Group: Mortgages and money

Refinancing리파이낸스 (재융자)

In one sentence

Paying off your current mortgage and replacing it with a new one, often to borrow more against your home’s equity or to change the rate or amortization. Banks normally cap the new loan at 80% of the home’s value.

Last checked Oct 31, 2026

What is it?

Refinancing means paying off your current mortgage and replacing it with a new one. The new mortgage can be with the same bank or with a different lender.

There are two main kinds. In one, you keep the same loan amount and only change the rate, the term or the amortization (how many years you take to repay). In the other, you borrow more because your home is worth more than when you bought it. Borrowing more is often called an equity take-out or cash-out refinance. Equity is the part of the home’s value that is yours after subtracting what you still owe.

Signing a new term for the same balance when your term ends is a renewal, not a refinance. You can refinance in the middle of a term, but then a penalty may apply.

Why do people refinance?

Lenders must ask and record what the money is for. OSFI (the federal banking regulator) lists these examples in its Guideline B-20.

  • Debt consolidation: paying off high-interest debts such as credit cards or a car loan by folding them into the mortgage.
  • Access to home equity: investing, paying for a child’s education, or the down payment on another property.
  • Renovation: a basement, kitchen or roof project.
  • Changing the loan: switching between fixed and variable, changing the amortization, or changing how you pay.

How you use the money can change whether the interest is tax-deductible (for example, borrowing to invest). Check this with an accountant.

How much can you borrow? The 80% rule

Government-backed mortgage insurance (CMHC and the private insurers) can only cover a loan whose purpose includes buying the home, or a loan that pays off a prior uninsured low-ratio loan. It cannot cover a refinance that takes out extra money (federal Eligible Mortgage Loan Regulations, s. 5(1)(b)).

At the same time, federally regulated lenders such as banks must insure any mortgage above 80% of the home’s value (OSFI Guideline B-20). Put the two rules together: when you refinance with a bank, the new mortgage cannot go above 80% of the appraised value. That 80% includes every other loan on the home, such as a second mortgage or a HELOC.

The value is the lender’s appraised value, not what you think the home is worth. B-20 says the lender must recalculate the loan-to-value ratio on every refinance.

Because the new loan is uninsured, you also go through the stress test again. At federally regulated lenders you must qualify at the higher of your contract rate plus 2% or 5.25% (OSFI minimum qualifying rate, as announced December 12, 2023). Credit unions are provincially regulated and their rules can differ, so ask them directly.

Example calculation

Suppose the appraised value is $1,000,000 and the current mortgage balance is $550,000.

ItemAmount
Appraised value$1,000,000
Maximum total borrowing (80%)$800,000
Current mortgage balance$550,000
Maximum extra you can take out$250,000
LessPenalty, legal and registration costs, appraisal fee, lender fees

This is an estimate for reference only. The real limit can be lower because of the appraisal, your income (stress test) and your credit score.

What does it cost?

  • Prepayment penalty: if you pay off the old mortgage before the term ends, you pay the penalty written in your contract. It is common for variable-rate mortgages to charge three months’ interest and for fixed-rate mortgages to charge the greater of three months’ interest or the interest rate differential (IRD), but ask your lender for the exact figure in writing. If the mortgage is more than five years old, the federal Interest Act lets an individual borrower pay it off with three months’ interest.
  • Legal and registration costs: the old mortgage is discharged from title and the new one is registered. If you only change the amount with the same bank, the registration is sometimes left as it is.
  • Appraisal fee: the lender may order an appraisal to confirm the value.
  • Lender or broker fees: the commitment letter lists the fees and charges you must pay. If you use a mortgage brokerage, it must tell you in writing whether it gets paid by anyone else, such as the lender, and by whom (O. Reg. 188/08, section 21). Check the amounts in the commitment letter and the disclosure documents.
  • Mortgage insurance: even if your current mortgage was CMHC-insured, the insurance does not carry over to a new mortgage that takes out extra money.

Refinance vs HELOC vs second mortgage

RefinanceHELOCSecond mortgage
ShapeOne bigger new mortgage replaces the old oneOld mortgage stays; a credit line you draw on as neededOld mortgage stays; a second loan behind it
RateFixed or variable (set fresh)Variable (usually prime plus a spread)Usually higher than a first mortgage
RepaymentSet payments of principal and interestMinimum payment is usually interest onlySet payments or interest only
LimitUp to 80% of value (all loans included)Revolving part up to 65%, 80% in totalVaries by lender
Penalty on old mortgagePossible if mid-termNoneNone

Which one is better depends on the penalty, the rate gap and how long you need the money. Ask a mortgage broker or your bank to show all three side by side.

What to watch out for

  • Resetting the amortization to 25 or 30 years lowers the monthly payment but raises the total interest you pay over your life.
  • Moving credit card debt into the mortgage turns unsecured debt into debt secured by your home. If you cannot pay, the home is at risk.
  • If the appraisal comes in low, you may get less money or no refinance at all.
  • If your income fell or rates rose, you may fail the stress test. Then renewing with your current lender may be the better path.
  • If a bank says no and you refinance with a private lender, rates and fees are higher and payments are often interest only. FSRA (Ontario’s financial regulator) treats private mortgages as a one- to two-year temporary option and says you need a realistic exit strategy first.
  • If you use refinance money as the down payment on another property, the new, larger payment counts against you when that purchase is underwritten.

Step by step

  1. Ask your lender in writing for the balance, the maturity date and the exact penalty on your current mortgage.
  2. Ask a mortgage broker or your bank to compare a refinance, a HELOC and a second mortgage side by side.
  3. Apply and provide income documents. If the lender wants an appraisal, an appraiser visits the home.
  4. Read the commitment letter. If a broker arranged it, you must get the disclosure documents at least two business days before you sign. They can come later only if you agree to that in writing.
  5. Your lawyer pays off the old mortgage, updates the registration on title and sends the remaining money to your account.

Example

Example

You bought a Markham townhouse six years ago. The mortgage balance is now $550,000 and the lender’s appraisal says $1,000,000. You need $120,000 to finish the basement.

The 80% cap is $800,000, so you could borrow up to $250,000 more, but you refinance into a new $670,000 mortgage for just what you need. You time it for the month your term ends, so there is no penalty, and the money arrives after legal, registration and appraisal costs are deducted. Because the new mortgage is uninsured, you are stress-tested again at your contract rate plus 2%.

What the law and official sources say

Quotes are copied word for word. The "In plain words" lines are our explanation, not an official translation.

OSFI Guideline B-20 — Insurance required above 80% LTVOSFI, Residential Mortgage Underwriting Practices and Procedures (Guideline B-20), Principle 4, "(i) Non-Conventional (“High Ratio”) Mortgage Loans"
By law, residential mortgages underwritten for the purpose of purchasing, renovating or improving a property must be insured if their LTV ratios are greater than 80 percent

In plain wordsFederally regulated lenders must insure any mortgage above 80% of the value. Since a refinance cannot be insured, 80% becomes the ceiling.

Source: osfi-bsif.gc.ca/en/guidance/guidance-library/residential-mortgage-underwriting-practices-procedures-guideline-2017 · checked Oct 30, 2026

Eligible Mortgage Loan Regulations — Insured loans must be for a purchaseEligible Mortgage Loan Regulations, SOR/2012-281, s. 5 (1)(b)
the purpose of the loan must either (i) include the purchase of the eligible residential property against which it is secured, or (ii) be the discharge of the outstanding balance of a prior uninsured low ratio loan;

In plain wordsGovernment-backed mortgage insurance only covers a loan to buy the home or to pay off a prior uninsured low-ratio loan. A refinance that takes out extra money cannot be insured.

Source: laws-lois.justice.gc.ca/eng/regulations/SOR-2012-281/FullText.html · checked Oct 30, 2026

OSFI Guideline B-20 — LTV recalculated on refinancingOSFI, Guideline B-20, Principle 4, "LTV Ratio Frameworks"
The LTV ratio should be re-calculated upon any refinancing, and whenever deemed prudent, given changes to a borrower’s risk profile or delinquency status, using an appropriate valuation/appraisal methodology.

In plain wordsOn every refinance the lender must value the home again and recalculate the loan-to-value ratio. That is why an appraisal may be needed.

Source: osfi-bsif.gc.ca/en/guidance/guidance-library/residential-mortgage-underwriting-practices-procedures-guideline-2017 · checked Oct 30, 2026

OSFI Guideline B-20 — Qualifying rate for uninsured mortgagesOSFI, Guideline B-20, Principle 3, "Debt service coverage"
At a minimum, the qualifying rate for all uninsured mortgages should be the greater of the contractual mortgage rate plus a buffer, as set by the Superintendent or the minimum (or “floor”) rate, as set by the Superintendent.

In plain wordsA refinanced mortgage is uninsured, so it is stress-tested. The OSFI rate announced on December 12, 2023 is the greater of the contract rate plus 2% or 5.25%.

Source: osfi-bsif.gc.ca/en/guidance/guidance-library/residential-mortgage-underwriting-practices-procedures-guideline-2017 · checked Oct 30, 2026

Interest Act (Canada) — Prepayment after five yearsInterest Act, R.S.C. 1985, c. I-15, s. 10 (1)
then, if at any time after the expiration of the five years, any person liable to pay, or entitled to pay in order to redeem the mortgage, … tenders or pays, to the person entitled to receive the money, the amount due for principal money and interest to the time of payment, as calculated under sections 6 to 9, together with three months further interest in lieu of notice, no further interest shall be chargeable, payable or recoverable

In plain wordsOnce a mortgage is more than five years old, an individual can pay it off with the interest owing plus three months’ interest. This does not apply to mortgages given by corporations.

Source: laws-lois.justice.gc.ca/eng/acts/I-15/FullText.html · checked Oct 30, 2026

Common questions

What is the difference between refinancing and renewing?

A renewal sets a new term for the same balance when the old term ends. A refinance creates a new mortgage, usually with a different amount or lender. Taking out extra money is always a refinance.

Do I have to borrow the full 80%?

No. 80% is the maximum at federally regulated lenders, and your real limit may be lower because of income and credit. Borrowing only what you need keeps interest down.

Do I always pay a penalty if I refinance mid-term?

Usually yes. The amount follows the formula in your contract, and if you increase the amount with the same lender they may reduce the penalty or blend the rates. Get the figure in writing before you decide.

Is there a stress test on a refinance?

Yes. A refinanced mortgage is uninsured, so federally regulated lenders test you at the greater of your contract rate plus 2% or 5.25%. Credit unions may use different rules.

What if the bank says no?

A mortgage broker (a Level 2 agent or a broker) can look at alternative or private lenders. Rates and fees are higher, so ask the questions FSRA recommends: why this loan, what it costs, and what the exit plan is.

Guides that use this term

Sources checked

  1. OSFI, Residential Mortgage Underwriting Practices and Procedures, Guideline B-20 (2017) · checked Oct 30, 2026
  2. OSFI, OSFI maintains Minimum Qualifying Rate for uninsured mortgages (news release, December 12, 2023) · checked Oct 30, 2026
  3. Eligible Mortgage Loan Regulations, SOR/2012-281 (laws-lois) · checked Oct 30, 2026
  4. Interest Act, R.S.C. 1985, c. I-15 (laws-lois) · checked Oct 30, 2026
  5. FSRA, What you need to know about alternate/private mortgages · checked Oct 30, 2026
  6. FSRA, Signing a Mortgage Contract (two business days to review) · checked Oct 30, 2026
  7. O. Reg. 188/08: Mortgage Brokerages: Standards of Practice (s. 21 fee disclosure, s. 35 disclosure deadline) (e-Laws) · checked Oct 30, 2026