A mortgage is a loan secured by real estate. If you stop paying, the lender can take the property. In exchange for that security, mortgage rates are lower than most other loans. The mechanics of how your payment is structured — and why it works the way it does — often surprises people.
The PITI Payment Breakdown
- •Principal: Reduces your loan balance — builds equity
- •Interest: The cost of borrowing — goes to the lender, builds no equity
- •Taxes: Property taxes, collected monthly and held in escrow
- •Insurance: Homeowner's insurance + PMI if applicable
Why You Pay Mostly Interest at First (Amortization)
On a $350,000 30-year mortgage at 7%, your payment is $2,329. In month 1: $2,042 goes to interest (88%), $287 goes to principal (12%). In year 10: the split is closer to 75% interest / 25% principal. In year 25: it flips — 65% principal, 35% interest. This is amortization — front-loading interest to ensure lenders get paid even if you sell early.
Fixed vs Adjustable Rate Mortgages
- •Fixed-rate: Same interest rate for the entire loan term — predictable, most common
- •5/1 ARM: Fixed for 5 years, then adjusts annually — lower initial rate but future risk
- •7/1 ARM: Fixed for 7 years — useful if you plan to sell within that window
- •ARMs were common pre-2008, rare after — most buyers now choose fixed rates
Make one extra mortgage payment per year (apply directly to principal). On a 30-year mortgage, this simple habit eliminates approximately 5 years of payments and saves tens of thousands in interest.
The mortgage payment is just one part of owning a home. The full cost also includes property taxes (~1.1% of value/year), insurance (~0.5%/year), maintenance (1–2%/year), and potentially PMI and HOA. Budget for all of them.
Frequently Asked Questions
What exactly is a mortgage?
A mortgage is a loan secured by real estate. The lender gives you money to buy a home; you agree to repay it over 10–30 years with interest. If you stop making payments, the lender can foreclose — take ownership of the property — to recover the debt.
What is mortgage amortization?
Amortization is how your fixed monthly payment is split between interest and principal over time. Early payments are mostly interest; later payments are mostly principal. After 5 years on a 30-year mortgage you've paid down less than 10% of the original balance because interest front-loads the schedule.
See your amortization schedule →What credit score do I need for a mortgage?
Conventional loans typically require a 620+ score; FHA loans accept 580+ (or 500 with 10% down). The higher your score, the lower your rate. The difference between a 640 and 760 score on a $300,000 loan can mean $100–$200 per month in interest costs.
Do I have to pay PMI, and when can I remove it?
Private mortgage insurance (PMI) is required by most lenders when your down payment is less than 20%. It typically costs 0.5–1.5% of the loan per year. Once your equity reaches 20% of the original value — either through payments or appreciation — you can request removal under the Homeowners Protection Act.
What does PITI stand for?
PITI stands for Principal, Interest, Taxes, and Insurance — the four components of a full monthly mortgage payment. Lenders often add HOA fees for condos. When evaluating affordability, always use the full PITI figure, not just principal + interest, as taxes and insurance can add 20–30% on top.