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Straight Switch vs. Refinance: Why the Difference Matters

Last reviewed: October 2026 · 4 min read

Imagine your mortgage is coming up for renewal.

You want to move from Lender A to Lender B.

That sounds simple.

But there is an important difference between:

moving the existing mortgage

and

changing the financing.

Those can be treated as different transactions.

What is a straight switch?

In simple terms, a straight switch usually means transferring the existing mortgage to another lender at renewal without materially increasing the borrowing.

For OSFI’s uninsured-mortgage minimum-qualifying-rate exception, an eligible straight switch between federally regulated lenders means there is no increase in the loan amount or remaining contractual amortization period.

Think:

Same basic mortgage. New lender.

The new lender still has to approve the borrower.

It is not an automatic transfer.

What is a refinance?

A refinance changes the financing.

For example, you may:

  • increase the mortgage balance;
  • access equity;
  • consolidate other debt;
  • extend the amortization;
  • or otherwise materially restructure the mortgage.

Think:

New financing objective.

That usually means a fuller qualification conversation.

Why does this distinction matter?

Because the qualification rules can differ.

OSFI currently says it does not expect federally regulated lenders to apply the prescribed minimum qualifying rate to eligible uninsured straight switches at renewal when the loan amount and amortization are not increased.

That does not mean:

“No underwriting.”

OSFI still expects the new lender to assess the borrower’s ability and willingness to service the debt and apply sound underwriting principles.

So the rule is better understood as:

No prescribed MQR for this specific type of switch—not no qualification.

Refinancing is different

FCAC says borrowers at federally regulated entities are generally required to qualify under the stress test when refinancing a home or taking out a home-equity line of credit.

For uninsured mortgages at federally regulated lenders, OSFI’s current prescribed minimum qualifying rate is the greater of:

the mortgage contract rate + 2 percentage points

or

5.25%.

That is one reason you should determine whether the transaction is actually a switch or a refinance before comparing lenders.

Example 1: Straight switch

Your mortgage balance is $500,000.

You have 20 years remaining on the amortization.

At renewal, you transfer the $500,000 mortgage to another lender and maintain the 20-year remaining amortization.

That may fit the concept of a straight switch, subject to the other applicable requirements.

Example 2: Not a straight switch

Same mortgage.

But you want an additional $80,000 to renovate the house.

Now the new mortgage would be $580,000.

You are increasing the loan amount.

That is not the type of straight switch covered by OSFI’s uninsured MQR exception.

Example 3: Changing the amortization

Your balance remains $500,000.

But instead of keeping the remaining 20 years, you want to extend the amortization.

That materially changes the financing.

Again, it does not fit OSFI’s definition of the uninsured straight switch covered by the exception.

Why business owners should pay particular attention

Suppose you originally obtained the mortgage as a salaried employee.

Five years later, you own a corporation.

If you are considering another lender, the way your income needs to be documented today may look different from the original application.

Do not assume:

“They approved me five years ago, so switching should be automatic.”

The new lender still needs to approve the file.

That makes it useful to review your present income situation well before maturity.

Straight switch vs refinance at a glance

  • Change lender

    Straight Switch
    Usually
    Refinance
    May or may not

  • Increase loan amount

    Straight Switch
    No for OSFI MQR-exempt switch
    Refinance
    Often possible

  • Increase remaining amortization

    Straight Switch
    No for OSFI MQR-exempt switch
    Refinance
    May be part of transaction

  • Access new equity

    Straight Switch
    No
    Refinance
    Potentially

  • New lender approval required

    Straight Switch
    Yes
    Refinance
    Yes

  • Prescribed uninsured MQR

    Straight Switch
    OSFI exception may apply
    Refinance
    Generally applies at federally regulated lenders

The actual treatment depends on the transaction and lender.

The takeaway

Before comparing rates, define the transaction.

Ask:

“Am I simply moving my existing mortgage—or am I changing what the mortgage does?”

That answer affects everything that follows.

Next step

If your mortgage is approaching maturity and you are unsure whether you are looking at a renewal, straight switch or refinance:

Review My Mortgage Renewal

General information only. Mortgage underwriting and qualification depend on the lender, transaction and borrower circumstances.

Sources