Buying your first home is one of the biggest financial decisions of your life. Understanding how mortgages work can literally save you tens of thousands of dollars. Here are 7 things every first-time buyer must know.

1. Your Credit Score Has a Massive Impact

A difference of just 40 points in your credit score can change your interest rate by 0.5–1.0%. On a $400,000 mortgage over 30 years, that's the difference between paying $280,000 or $340,000 in total interest. Before applying, check your credit report for errors and spend 6 months improving your score.

💡 Pro Tip: You can get your credit reports free at AnnualCreditReport.com. Dispute any errors — they can drag down your score significantly.

2. Pre-Approval Is Not the Same as Pre-Qualification

Pre-qualification is a quick estimate based on your self-reported income. Pre-approval means the lender has actually verified your income, assets, and credit. In competitive markets, sellers won't take your offer seriously without a pre-approval letter.

3. The Down Payment Affects More Than Your Loan Amount

If you put less than 20% down, you'll typically pay Private Mortgage Insurance (PMI), which adds $100–$200/month to your payment until you reach 20% equity. With a $400,000 home:

  • 5% down ($20,000): Loan = $380,000 + PMI ~$150/mo
  • 10% down ($40,000): Loan = $360,000 + PMI ~$100/mo
  • 20% down ($80,000): Loan = $320,000, no PMI

4. Shop at Least 3–5 Lenders

Studies show that getting just one additional rate quote saves borrowers an average of $1,500. Getting 5 quotes can save $3,000 or more. Don't just go with your current bank — check credit unions, online lenders, and mortgage brokers.

🏆 Best Practice: Get all loan quotes within a 14-day window. Credit bureaus treat multiple mortgage inquiries in a short period as a single inquiry, minimizing the impact on your score.

5. Fixed-Rate vs. Adjustable-Rate: Know the Risk

A 30-year fixed-rate mortgage gives you payment stability — your rate never changes. An ARM (Adjustable-Rate Mortgage) starts lower but can increase significantly after 5–7 years. Unless you plan to sell or refinance before the adjustment period, the certainty of a fixed rate is usually worth it.

6. Points Can Save You Money (Or Cost You)

Mortgage "points" are upfront fees paid to lower your interest rate. One point = 1% of the loan amount. On a $400,000 loan, one point costs $4,000 and typically reduces your rate by 0.25%. This saves ~$60/month — breaking even after about 67 months (5.5 years). Only worth it if you plan to stay long-term.

7. Your Total Monthly Cost Is More Than Principal & Interest

Lenders look at PITI — Principal, Interest, Taxes, and Insurance. Don't forget:

  • Property taxes (varies widely by location — 0.5% to 2.5% of home value annually)
  • Homeowners insurance ($1,000–$3,000/year)
  • HOA fees (if applicable — $100–$500/month)
  • Maintenance (budget 1–2% of home value per year)

Use our mortgage calculator to see your full PITI payment before you commit.