Blended Interest Rate Calculator
Add every debt you carry — mortgage, credit cards, CRA, vehicle, line of credit — and see your true blended effective rate. Then see what consolidating into one mortgage would save you each year.
Your debts
Tip: paste from Excel or your system — balance and rate can be tab or comma separated (e.g. $12,000 → 5.29%).
Annual interest cost
Effective Annual Rate (EAR) = (1 + r/n)n − 1. Compounding follows Canadian convention: fixed mortgages semi-annual, variable / LOC / HELOC monthly, credit card and CRA daily.
Annual interest · who's eating you alive
The longest bar is your biggest annual interest cost. What consolidation actually saves depends on each rate's gap to the mortgage rate — see the comparison below.
What consolidation could save
Rolls every non-mortgage debt into one mortgage-style loan (semi-annual compounding) at the rate below. Interest cost only — prepayment penalties, legal and appraisal fees are not included.
- Each debt type carries its true compounding convention — credit cards and CRA debt compound daily, mortgages semi-annually, lines monthly — and the blend is computed on effective annual rates
- Includes a CRA tax-debt row (daily compounding, non-deductible) — because that's a real balance on real files
- Paste straight from Excel — balances and rates split automatically from tab or comma data
Should you blend, break, or switch?
Calculators give estimates. We compare your blend-and-extend offer against breaking with a penalty and switching lenders — and tell you which actually saves the most over your remaining term. Free, no obligation, same-day reply.
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Common questions
What is a blended interest rate?+
Your blended rate is the weighted-average effective annual rate (EAR) across every debt you carry, weighted by balance. It tells you the true cost of your overall debt load — not just the mortgage.
Why does compounding frequency matter?+
Credit cards compound daily, lines of credit and variable mortgages monthly, and Canadian fixed mortgages semi-annually by law. The more often interest compounds, the higher the effective annual rate compared to the posted nominal rate.
Why is CRA debt worse than mortgage debt?+
CRA interest compounds daily and is not tax-deductible for individuals. Combined with collection powers (garnishments, liens), the real-world cost is almost always higher than rolling that balance into a mortgage at a lower rate.
Does this include refinance fees or penalties?+
No — the consolidation comparison shows interest cost only. Your broker will run a full break-even that includes any prepayment penalty, legal and appraisal fees, and amortization changes.
How it works: each debt is converted to an Effective Annual Rate (EAR) using its actual compounding schedule, then weighted by balance to produce your blended rate. CRA and credit card balances are compounded daily — usually the silent killers of household cash flow.
Also see: Land transfer tax → · Financing fees →
Every calculator here is built on published Canadian government rules and lender methodology, and was last checked for accuracy on August 1, 2026 — the arithmetic re-verified and every page re-read on screen. Rates and thresholds change — we confirm the current numbers for your file before you rely on them.