Revolving home-equity credit

HELOC Calculator Canada

Estimate the maximum HELOC limit under standalone and combined LTV constraints, test a requested limit and expected draw, and model interest-only or amortizing payments at higher rates.

65% standalone LTV logic80% combined LTV logicRequested-limit testInterest-only and amortizing payments

Calculation inputs

Estimate HELOC room and payment risk

The engine applies both a standalone HELOC LTV cap and a combined secured LTV cap, then tests the requested limit, expected draw, payment, and rate shocks.

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LTV policy assumptions
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How the calculation works

Understand the formula before relying on the result

Standalone HELOC cap

The calculator multiplies the property value by the entered HELOC-only LTV cap. The default is 65%, reflecting the general federal consumer guidance for HELOC components.

Combined secured cap

The engine also calculates the room left under the entered combined secured LTV after subtracting the first mortgage and other secured debts. The default combined cap is 80%.

Maximum estimated limit

The lower of the standalone and combined calculations is shown as the estimated maximum. This prevents the HELOC limit from exceeding either constraint.

Payment sensitivity

Interest-only payment equals the expected balance times the annual rate divided by 12. The amortizing option uses a monthly-compounded payment estimate. Both are recalculated at rate increases of 1% and 2%.

Interpret the result

Credit limit versus balance

The limit is the amount available to draw. The balance is what has actually been borrowed and generally drives the interest payment.

Combined LTV at limit

Lenders may assess the registered or approved limit rather than only the current balance for some risk and qualification purposes.

Interest-only risk

A minimum interest-only payment keeps the balance unchanged. Without a repayment plan, the debt can remain indefinitely and payments can rise with prime.

Available credit

Available credit is the lower of the requested and LTV-supported limit minus the expected drawn balance. A lender can still freeze, reduce, or cancel access under the agreement.

Common mistakes

  • Assuming a HELOC can equal 80% of the property value by itself.
  • Subtracting only the current HELOC balance instead of considering the credit limit.
  • Treating an interest-only payment as debt repayment.
  • Ignoring prime-rate changes and payment shock.
  • Using revolving home equity for long-term expenses without an amortization or exit plan.

What lenders review

  • Appraised property value and all existing secured registrations.
  • Requested credit limit, intended use, and expected utilization.
  • Income, credit, debt-service ratios, and ability to withstand variable rates.
  • First-mortgage lender, collateral-charge structure, and whether another lender can register behind it.
  • Legal, appraisal, title, property, and product-specific conditions.

Planning tips

  • Set a planned repayment amount above the minimum interest charge.
  • Stress-test the balance at rates 1% and 2% higher.
  • Use only the limit needed; a large unused limit can affect future borrowing.
  • Compare a HELOC with an amortizing refinance or second mortgage for long-term debt.
  • Avoid using home equity to cover recurring deficits without fixing the underlying cash-flow problem.

Connected HopeWell knowledge

Connect the heloc calculator to the mortgage decision

Use the result alongside HopeWell's guide chapters, glossary definitions, real underwriting case studies, service pages, and related calculators.

Calculation pathway

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Continue into qualification, purchase costs, equity, refinancing, HELOC planning, and mortgage comparison using the connected calculators below.

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Frequently asked questions

Questions about this calculation

How much can I borrow on a HELOC in Canada?

Federal consumer guidance states that a HELOC component may generally be up to 65% of the home's value. Total secured borrowing can reach up to 80% when the portion above 65% is amortizing mortgage credit, subject to lender approval.

How is a HELOC payment calculated?

Many HELOCs require at least monthly interest on the amount drawn. The payment changes with the balance and variable rate. Some products or borrower plans use amortizing payments.

Does an unused HELOC cost interest?

Interest is generally charged on the amount drawn, not the unused limit, though setup, annual, inactivity, legal, appraisal, or discharge fees may apply.

Can the rate change?

Yes. HELOCs are typically variable-rate products priced from a lender prime rate plus or minus a margin.

Is a HELOC better than refinancing?

It depends on the amount, timing, repayment plan, rate, fees, existing mortgage penalty, qualification, and need for revolving access. The lowest initial payment may not be the lowest-risk option.