# Auto Refinance Calculator — Canada

> Compare remaining cash payments under the current loan with a new term, keeping financed fees separate from up-front fees. CAD planning view; stated limitations apply.

Page: https://askcalculators.com/ca/auto-refinance/
Definition: https://askcalculators.com/ca/auto-refinance/definition.json
JSON Schema: https://askcalculators.com/ca/auto-refinance/schema.json
Version: 20.16.0
Maintained by: AskCalculators (software project; not a credentialed reviewer)
Qualified review: pending. Automated checks do not establish professional approval.
Page status: Live
Review status: Pending

## Use
Open the calculator page and enter values. Query-string parameters can restore and bookmark a calculation.
Example: https://askcalculators.com/ca/auto-refinance/?balance=18000&oldRate=8&oldMonths=48&newRate=5&newMonths=48&fees=300&financeFees=0

## Inputs
- balance: Current principal balance; type=money; required; default=18000; min=0; max=1000000000000
- oldRate: Current annual nominal interest rate; type=percent; required; default=8; min=0; max=100
- oldMonths: Current remaining monthly payments; type=number; required; default=48; min=1; max=1200
- newRate: New annual nominal interest rate; type=percent; required; default=5; min=0; max=100
- newMonths: New term, monthly payments; type=number; required; default=48; min=1; max=1200
- fees: Refinance fees; type=money; required; default=300; min=0; max=1000000000000
- financeFees: Add fees to the new principal; type=checkbox; optional; default=false

## Outputs
- oldPayment: Current modeled monthly payment; format=currency
- newPayment: New modeled monthly payment; format=currency
- monthlySaving: Monthly payment reduction; format=currency
- totalSaving: Difference in remaining total cash paid; format=currency; primary
- feePayback: Up-front fee payback, months; format=number

## Formula
level payment = principal × monthly rate / (1 − (1 + monthly rate)^−months).

Inputs are converted to canonical units before evaluating this stated formula.

## Rules
- Empty optional inputs are undefined, not zero.
- Hidden conditional inputs are ignored.
- Do not invent missing required inputs.

Notice: Illustrative defaults are not local quotes or verified legal rules. Dated reference components and user-entered assumptions are explicitly distinguished. Professional review is pending.