📊 Mortgage Payment Calculator · 2026
$800,000 Mortgage
at 8.0% Interest Rate
8.0% is high — crunch the numbers carefully
Monthly payment, 15 vs 30 year comparison, total interest, and what salary you need to qualify.
Monthly P&I Payment · 8.0% · 30-Year · 20% Down
$4,696
Loan amount: $640,000 · Down payment: $160,000
$1,690,560
Total Paid (30yr)
15-Year vs 30-Year at 8.0%
30-Year Fixed
$4,696/mo
Total: $1,690,560
Interest: $1,050,560
15-Year Fixed
$6,116/mo
Total: $1,100,880
Save: $589,680 in interest
How 8.0% Compares to Other Rates
Data Table
| Rate | Monthly Payment | Total Interest (30yr) | vs 8.0% |
| 5.5% | $3,634/mo | $668,186 | $382,374 less |
| 6.0% | $3,837/mo | $741,364 | $309,196 less |
| 6.5% | $4,045/mo | $816,285 | $234,275 less |
| 7.0% | $4,258/mo | $892,857 | $157,703 less |
| 7.5% | $4,475/mo | $970,990 | $79,570 less |
| → 8.0% | $4,696/mo | $1,050,594 | ← You are here |
Banker's Take on 8.0%
This rate means you'll pay more in interest than the home is worth. Make sure the buy still makes sense for your situation. At 8.0%, your monthly payment on a $800K home is $4,696. Over 30 years, you'll pay the bank $1,050,560 in interest alone — 164% of what you borrowed.
To qualify, most lenders want your total monthly debt (including this payment) to stay under 43% of your gross monthly income. That means earning at least $201K/year with no other significant debt.
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The part almost nobody publishes free
Prices and rates are widely reported. Whether a lender says yes is not. In the complete 2025 federal record, denial rates across the 100 largest FHA lenders ran from 1.8% to 78.7% — same programme, same year.
And it is not simply who applies where: standardizing on state, loan amount, income, debt-to-income and loan-to-value, applicant mix explains only a 2.7× range in expected outcomes.
CFPB HMDA 2025, computed by FinanceRateCalc. Covers the highest-volume lenders published per market, not all lenders. Historical observations, not predictions. CC BY 4.0, not independently reproduced.
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One finding a week from the federal mortgage record.
One chart, three paragraphs, every Saturday. Measured, not assumed.
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