Free Mortgage Calculator

Run your mortgage
on your terms.

Most mortgage calculators show you one number. This one lets you model your entire mortgage — different rates at renewal, extra payments, amortization comparisons — all in one place, all free.

Compare up to 5 amortization scenarios side by side
Excel-style tabs — save different rate, frequency, and payment setups and compare total interest and payoff time instantly.
See the true impact of pre-payments on interest
Extra per payment, annual lump sum, or one-time injection — the schedule recalculates and shows exactly how much you save.
Model rate renewals over your full mortgage term
Mortgages are never static. Enter a new rate at each renewal and the amortization schedule recalculates from that point forward.
Export a full PDF — your analysis in your hands
Complete amortization schedule, all scenarios, and assumptions exported to PDF. Bring it to your next mortgage conversation.
Run Your Analysis Free · No sign-up · Opens in new tab

Semi-annual compounding per the Interest Act (Canada). Results are estimates only.

austinmortgagecalculator.netlify.app
Total payments made
$998,568
Total interest paid
$358,568
Principal paid down
$640,000
How long to pay off
21yr 8mo
Principal paid
Interest paid
Remaining balance
Year
Payments
Principal
Interest
Balance
Year 1
$46,049
$17,925
$28,124
$622,075
Year 2
$46,049
$18,740
$27,309
$603,335
Year 3
$46,049
$19,593
$26,456
$583,742
Year 4
$46,049
$20,485
$25,564
$563,257
See your full analysis →
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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