Quick summary
A mortgage is a secured loan for real estate. Understand principal vs interest, amortization, the trade-offs between fixed and adjustable rates, and the upfront fees to budget for before closing.
1 — Mortgage basics: principal, interest and amortization
A mortgage payment typically includes principal (the loan balance) and interest (the cost of borrowing). An amortization schedule front-loads interest payments: early payments pay mostly interest while later payments reduce principal faster.
On a 30-year fixed loan, monthly payments are constant but the composition shifts — year 1 payments primarily cover interest; by year 15 more goes to principal.
2 — Fixed-rate vs adjustable-rate mortgages (ARM)
Fixed-rate mortgages lock a constant interest rate and monthly payment for the loan term (commonly 15 or 30 years). ARMs offer a lower initial rate that later adjusts with a reference index plus a margin — useful if you plan to sell or refinance before adjustments.
| Feature | Fixed-rate | ARM |
|---|---|---|
| Monthly payment | Stable | May change after initial period |
| Initial rate | Usually higher | Usually lower |
| Best if | You value predictability / long-term stay | You plan to sell or refinance early |
3 — Common fees and closing costs
Expect appraisal fees, title insurance, lender origination fees, recording fees, and prepaid items (insurance, taxes). Closing costs typically range from ~2%–5% of the loan amount depending on location and lender.
4 — Pre-approval, credit and documentation
Get pre-approved to understand your price range. Lenders will check credit score, income (pay stubs, W-2/1099), assets (bank statements) and employment verification. Higher credit scores and lower DTIs (debt-to-income ratios) secure better rates.
5 — Strategies to lower mortgage cost
- Improve credit score before applying.
- Shop multiple lenders and compare APR (not just rate).
- Consider larger down payments to reduce mortgage insurance.
- Pay extra principal early when affordable to shorten amortization.
6 — Refinance considerations
Refinancing replaces an existing mortgage with a new one, often to lower rate or change term. Compare remaining interest savings to refinancing costs and hold-time to determine if it’s worthwhile.
7 — Frequently Asked Questions
How much should I put down?
A 20% down payment avoids private mortgage insurance (PMI) on conventional loans. Smaller down payments are possible with FHA/VA/USDA programs but often include added costs or PMI.
What is PMI and when do I pay it?
PMI protects the lender when the borrower's down payment is under 20%. It is typically paid monthly, though some policies allow lender-paid PMI or one-time upfront payments.