Why Mortgage Rates Aren't the Whole Story

Why Mortgage Rates Aren't the Whole Story

Every week, headlines announce the latest 30-year fixed rate. Buyers fixate on that number. But your actual monthly payment — and your total cost of homeownership — depends on several factors that the rate headline doesn't capture.

---

What the Rate Doesn't Include

When a lender quotes you "6.5%," they're quoting your interest rate — the cost of borrowing the principal. But your actual monthly obligation includes:

• Principal + Interest (P&I): Calculated from the interest rate
• Property Taxes: Typically 1–1.5% of home value annually, escrowed monthly
• Homeowner's Insurance (HOI): Usually $100–$200/mo depending on coverage
• PMI or MIP: If your down payment is under 20% (conventional) or you're using FHA
• HOA Dues: If applicable — can be $50–$800+/mo in condos or planned communities

The term for the full monthly payment is PITI (Principal, Interest, Taxes, Insurance). Lenders qualify you on PITI, not just P&I.

---

Example: The Same Rate, Very Different Payments

Scenario	Rate	P&I	Taxes	Insurance	PMI	Total PITI
$400k / 20% down	6.5%	$2,023	$417	$130	$0	**$2,570**
$400k / 5% down	6.5%	$2,402	$417	$130	$213	**$3,162**

Same rate. $592/mo difference — entirely from down payment and PMI.

---

The APR vs. Rate Distinction

APR (Annual Percentage Rate) includes the interest rate plus lender fees (origination, points, etc.) expressed as a single annualized figure. APR is more useful for comparing loan offers from different lenders because it accounts for how costs are baked in.

A loan with a 6.25% rate and 1 point paid upfront might have a higher APR than a 6.5% rate with zero points — meaning the "lower rate" option actually costs more depending on how long you keep the loan.

---

Points: Buying Down the Rate

Mortgage points (also called discount points) let you prepay interest upfront to lower your rate. One point = 1% of the loan amount.

• 1 point on a $400k loan = $4,000 upfront
• Might buy your rate down from 6.5% → 6.25%
• Monthly savings: ~$60/mo
• Break-even: ~67 months (~5.5 years)

If you plan to sell or refi before break-even, don't buy points.

---

The Real Number That Matters for Qualification

Lenders qualify you on your Debt-to-Income ratio (DTI) — specifically, your total monthly debt obligations (PITI + car payment + student loans + credit cards) divided by your gross monthly income.

Most conventional loans require a DTI under 43–45%. FHA allows up to 57% in some cases with compensating factors.

The rate is just one variable. The full payment is what your DTI is calculated on.

---

Bottom line: When comparing mortgage options, always look at PITI — not just the rate. A lower rate with higher fees or a smaller down payment can cost you more than a slightly higher rate with less friction.