Dominion Lending CentresDLCG · #1 for new mortgages · $84.5B in 2025
Residential Debt Analysis

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%).

$
%
$
%
$
%
$
%
$
%
Your blended effective rate
0.00%
on $0 total · weighted nominal 0.00%

Annual interest cost

Total / year$0
≈ $0 every month going to interest alone.

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.

%
Enter a balance on a non-mortgage debt to see the comparison.
What this calculator does that most don't
  • 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
Want a real plan, not just an estimate?
Send Ramin exactly what you just calculated — your scenario rides along automatically, so the first conversation starts at your numbers, not at zero.
or use the full contact form
Free personalized quote

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.

Get my free renewal review

No credit pull · No spam · Reply within hours

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. 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.

See it on a real file: CRA Back Taxes and Arrears Settled at 80% →

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.

Case Studies — files like this

Anonymized case studies from our files. Names and identifying details removed.

More case studies that use this calculator (37)

  1. Equity Line After a COVID Income Dip
  2. Private Second at 61%, Bank First Kept
  3. Refinance Plus Line of Credit, Appraisal Waived
  4. Sold in Surrey, Bought in Edmonton Next Day
  5. Anmore Estate: Credit Lines Into One Payment
  6. Maternity-Leave Debt Cleared by Refinance
  7. Seasonal Layoff, $100,000 of Cards, 80%
  8. Business Owners: Salary, Dividends, Add-Back
  9. Retired Parent as Guarantor: Refinance at 27%
  10. Equity Line at 29%: Debt, Deposit, Title
  11. Alberta Rental's Tax Arrears Cleared
  12. Sixteen Debts Into One Private Second
  13. Single Parent, 594 Score, Refinance at 60%
  14. Collections and a U.S. Hospital Bill Cleared
  15. Blended Rate Kept a 2021 Mortgage Rate
  16. CRA Back Taxes and Arrears Settled at 80%
  17. Judgment, CPL, 497 Score: Title Cleared
  18. Salon Owner's Stated-Income Refinance at 68%
  19. Second Mortgage With an Interest Reserve
  20. Renewal Offer Not Competitive: Moved Lenders
  21. Equity Line Cleared Debt at Scores Under 530
  22. Collections Cleared, Title Corrected, 75%
  23. Consumer Proposal Paid, 1.79% First Kept
  24. Ontario Refinance at 75% Funded the Presale
  25. Presale Sold, Two Private Mortgages Paid Out
  26. Alberta Retirees' Written-Off Debts Cleared
  27. Franchise Owners: Two Private Mortgages Out
  28. Business Owner Out of a Private Mortgage
  29. Retirees' $236K of Debt in One Private Loan
  30. Bank Refused the Renewal After a Death
  31. Blend and Extend Avoided a $50K+ Penalty
  32. CRA Debt Cleared, Brewery's Credit Line Kept
  33. Bank First and Private Second Folded Into One
  34. Private Second Funds a New Franchise
  35. Clinic Loan Judgment Settled by Refinance
  36. Reverse Mortgage at 78 Ends the Payments
  37. Private Lender at 10%+ — We Cut the Rate in Half

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 October 18, 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.