The single biggest driver of a monthly mortgage payment is the loan amount, followed closely by the interest rate. A buyer purchasing a $400,000 home with 20% down ($80,000) takes out a $320,000 loan. At a 6.5% 30-year fixed rate, the principal-and-interest payment alone is about $2,023/month. Add estimated property taxes and homeowner's insurance and the full PITI payment rises to roughly $2,506/month.
The table below scales that calculation across realistic 2026 price points. These are estimates — your actual payment depends on your credit, exact rate, location, and tax bill. Calculate your exact payment with your own numbers in a few seconds.
Monthly Payment by Home Price (20% Down, 6.5%, 30-Year)
P&I = principal and interest. PITI adds estimated property tax (~1.1%/yr of value) and insurance (~0.35%/yr). No PMI is shown because 20% down avoids it.
| Home Price | Loan Amount | Monthly P&I | Est. Tax | Est. Insurance | Est. PITI |
|---|---|---|---|---|---|
| $200,000 | $160,000 | $1,011 | $183 | $58 | $1,253 |
| $300,000 | $240,000 | $1,517 | $275 | $88 | $1,879 |
| $400,000 | $320,000 | $2,023 | $367 | $117 | $2,506 |
| $500,000 | $400,000 | $2,528 | $458 | $146 | $3,132 |
| $600,000 | $480,000 | $3,034 | $550 | $175 | $3,759 |
| $750,000 | $600,000 | $3,792 | $688 | $219 | $4,699 |
| $1,000,000 | $800,000 | $5,057 | $917 | $292 | $6,265 |
Want the breakdown for your exact price, down payment, and tax rate? Run it through the full PITI calculator.
How Sensitive Is the Payment to the Interest Rate?
Rate matters as much as price. The table below holds the loan fixed at $400,000 over 30 years and only moves the rate from 5.5% to 7.5%. Every half-point adds roughly $130 a month — meaning a full 1% rate increase adds about $269/month on a $400k loan, and tens of thousands of dollars in lifetime interest.
| Interest Rate | Monthly P&I | Total Interest (30 yr) | Change vs. Prior Row |
|---|---|---|---|
| 5.5% | $2,271 | $417,616 | — |
| 6.0% | $2,398 | $463,353 | +$127/mo |
| 6.5% | $2,528 | $510,178 | +$130/mo |
| 7.0% | $2,661 | $558,036 | +$133/mo |
| 7.5% | $2,797 | $606,869 | +$136/mo |
Locking in a lower rate, buying discount points, or putting more down all move the payment. Our mortgage points calculator and down payment calculator let you test those levers, and you can calculate your exact payment at any rate.
Methodology
Every figure on this page is computed in code with the same functions that run our calculators — not pulled from a static chart. Principal and interest use the standard fixed-rate amortization formula:
M = P · [ r(1+r)n ] / [ (1+r)n − 1 ]
where P is the loan principal, r is the monthly rate (annual rate ÷ 12), and n is the number of payments (term × 12). Assumptions:
- Rate: 6.5% — an illustrative 2026 30-year fixed rate. Real rates move weekly; check the current rate via Freddie Mac's Primary Mortgage Market Survey before relying on any estimate.
- Down payment: 20% of the home price, which removes PMI.
- Term: 30-year fixed.
- Property tax: ~1.1% of home value per year — an illustrative U.S. average. Real rates vary widely by state and county.
- Insurance: ~0.35% of home value per year — illustrative; premiums vary by location and coverage.
Because these are estimates, your real payment will differ. Taxes, insurance, HOA dues, and PMI (if you put down less than 20%) all add to the P&I figure. For a number tied to your own inputs, calculate your exact payment.
Sources & Honest Caveats
- Payment math: KeyRate's own mortgage payment calculator (open, standard amortization formula).
- Rate context: Freddie Mac Primary Mortgage Market Survey (PMMS) is the standard weekly benchmark for the U.S. 30-year fixed rate.
- These figures are educational estimates, not a loan offer or financial advice. Your actual rate, taxes, and insurance will differ.
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Looking Beyond the Mortgage Payment?
Your housing budget depends on take-home pay as much as on the loan. See your take-home pay after taxes on our sister site to gauge how much income actually lands in your account each month, then come back and check how much house you can afford.
Financial Disclaimer: All figures are estimates for educational purposes only and are not financial advice or a loan offer. Actual mortgage terms depend on your credit score, lender, location, and market conditions. Consult a licensed mortgage professional before making decisions.