How Mortgage Payments Are Calculated
Learn the mathematical formula used to determine your fixed monthly payment.
Read moreMortgage Guides
Plain-language explanations of mortgage mechanics, financial strategies, and lender math.
Mortgage models by countryCompare the US, Australian, Canadian, and UK conventions used in calculator scenarios.ExploreCalculation Basics
Principal vs. Interest Explained
Understand the difference between the money you borrowed and the cost of borrowing it.
Read moreMortgage Amortization Explained
Learn how your loan balance decreases over time through scheduled payments.
Read moreHow Mortgage Interest Works
The math behind mortgage interest and why the early years of a loan are the most expensive.
Read moreStrategy
Buying Basics
How Much Down Payment Do You Need?
Explore how down-payment options and trade-offs can vary by program, lender, and jurisdiction.
Read moreMortgage Affordability Explained
Learn how lenders determine how much house you can afford.
Read moreUnderstanding Closing Costs
A breakdown of the fees you pay when finalizing a mortgage.
Read moreDefinitions
What is Debt-to-Income Ratio (DTI)?
Understand the formula lenders use to evaluate your borrowing capacity.
Read moreWhat is Loan-to-Value Ratio (LTV)?
Learn how the relationship between your loan amount and home value affects your mortgage.
Read moreWhat is Mortgage Insurance?
Learn why lenders require mortgage insurance and how it protects them.
Read more