Fixed vs Variable Rate Calculator — Austin Yeh

Fixed vs. Variable Rate Comparison

Model your full mortgage under fixed and variable scenarios — with renewals, rate changes, and a year-by-year breakdown

Fixed Rate
$

Set your initial rate and term. Add renewals to model rate changes at end of each term.

%
Fixed rate
4.50%
Variable Rate
%
%
Starting variable
4.70%
▸ Model prime rate changes month by month
Click to expand — set rate changes for up to 60 months
▼
Yellow rows = months with a rate change. Insert = change to prime that month (e.g. −0.25 = BoC cut). Overnight = running prime rate. Variable = your effective rate after spread.
All calculations use semi-annual compounding as required by the Interest Act (Canada). Results are illustrative — actual rates depend on your lender. This does not constitute financial advice.
Interest paid per year — Fixed vs. Variable
Fixed interest
Variable interest
Fixed balance
Variable balance

Bars = annual interest paid. Lines = remaining balance.

Cumulative interest — Fixed vs. Variable
Fixed cumulative
Variable cumulative
Year-by-year comparison

Want to run these numbers with your actual rate?

Book a free call — I'll walk you through fixed vs. variable in your specific situation.

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