Understanding Your Mortgage Payment (PITI)
Buying a home is one of the largest financial decisions you'll ever make. A mortgage calculator helps you understand the true cost of homeownership beyond just the purchase price. Most monthly payments are made up of four main components, often referred to as PITI:
- Principal: The actual amount of money you borrowed from the lender to buy the home.
- Interest: The cost of borrowing that money, calculated as a percentage of the principal.
- Taxes: Real estate or property taxes charged by your local government, usually held in an escrow account.
- Insurance: This includes homeowners insurance.
How the Mortgage Formula Works
The standard formula for calculating a fixed-rate monthly payment is:
Where M is the total monthly payment, P is the principal loan amount, i is your monthly interest rate (annual rate divided by 12), and n is the number of months in your loan term.
Key Factors That Affect Your Payment
1. The Size of Your Down Payment
The more money you put down upfront, the less you need to borrow. A 20% down payment is the traditional gold standard because it usually allows you to avoid paying for Private Mortgage Insurance (PMI).
2. Your Credit Score and Interest Rate
Lenders use your credit score to determine your risk level. A higher score typically leads to a lower interest rate, which can save you tens of thousands of dollars over the life of a 30-year loan.
3. The Loan Term
A 15-year mortgage will have higher monthly payments than a 30-year mortgage, but you will pay significantly less in total interest because you're paying the loan off faster.
Mortgage Frequently Asked Questions (FAQ)
PMI is a type of insurance that protects the lender if you stop making payments on your loan. It is typically required if your down payment is less than 20% of the home's purchase price.
Yes. Even with a fixed-rate mortgage, your total monthly payment can change if your property taxes or homeowners insurance premiums go up or down.
An escrow account is a neutral third-party account where your lender holds funds to pay your property taxes and insurance premiums on your behalf.