Monthly mortgage payments are calculated using the loan amount, interest rate, and loan term with the standard amortization formula: M = P[r(1+r)^n]/[(1+r)^n-1], where P is the principal, r is the monthly interest rate, and n is the total number of payments. This produces only the principal and interest portion. Most homeowners also pay property tax, homeowners insurance, and possibly PMI on top. Together these form the full monthly housing cost commonly called PITI.

Gross salary is your total compensation before any deductions are taken out. Net salary, often called take-home pay, is what actually arrives in your bank account after federal income tax, state tax, Social Security, Medicare, and other withholdings. The gap between gross and net can be 20% to 40% depending on your income level and where you live. Understanding both helps with budgeting and negotiating job offers.

There is no universal answer; it depends on how long you plan to stay, local price-to-rent ratios, mortgage rates, and expected investment returns on money you would otherwise put toward a down payment. Buying tends to win over longer time horizons because you build equity and benefit from appreciation. Renting often wins in expensive coastal cities or when you might move within five years. Use a calculator that compares total net worth in both scenarios to make a data-driven choice.

Private Mortgage Insurance protects the lender, not you, when your down payment is less than 20% of the home price. It is typically 0.3% to 1.5% of the original loan amount per year, added to your monthly mortgage payment. Once you reach 20% equity through payments or appreciation, you can usually request PMI removal. At 22% equity it is automatically canceled by federal law for most conventional loans.

An amortization schedule is a complete table showing every payment over the life of your loan, broken into principal and interest portions. Early payments are mostly interest while later payments are mostly principal, even though the total payment stays the same. The schedule lets you see exactly how much you still owe after any given year and how much total interest you will pay. It is invaluable for planning extra payments or refinancing decisions.