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Partner Buy-In Calculator

Turn Your Home into a Fair Partnership

Buying into a home your partner already owns is a complex financial decision—and one of the least understood.

The Partner Buy-In Calculator helps you determine a fair buy-in amount, understand how monthly costs should be shared, and track how equity should be allocated over time.

You can model unequal contributions, living arrangements, and ownership splits, then simulate future outcomes—including buyouts, refinancing, or selling the property when and if your relationship ends.

The result is clarity: a structured, transparent approach to turning an existing property into a shared investment.

Disclaimer

The mortgage calculators provided on this website are for general informational and illustrative purposes only. The results generated are based on user-entered information and standardized assumptions regarding interest rates, amortization periods, debt service ratios, stress test requirements, property taxes, and other inputs.

These tools do not constitute financial advice, mortgage advice, a mortgage approval, or a commitment to lend.

Actual mortgage qualification and terms depend on many factors, including but not limited to:

  • Verification of income and employment

  • Credit history and credit score

  • Existing debt obligations

  • Down payment source and documentation

  • Property type and location

  • Applicable federal and provincial regulations

  • Specific lender underwriting policies and guidelines

Lender policies and regulatory requirements may change without notice and may differ between financial institutions. As a result, the outcomes produced by these calculators may not reflect the final mortgage approval amount, interest rate, product structure, or conditions offered by a lender.

For advice tailored to your individual circumstances, please consult with me.

Mortgage services are provided in accordance with applicable provincial legislation, including the Mortgage Brokerages, Lenders and Administrators Act, 2006 (Ontario) and regulated by the Financial Services Regulatory Authority of Ontario (FSRA) where applicable.

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