Advanced Mortgage Comparison Simulator
Compare Fixed vs ARM mortgage scenarios, simulate extra payments, estimate refinance break-even, and review amortization insights with tax-deduction aware interest view.
Mortgage comparison inputs
Fixed mortgage scenario
Monthly payment: $2,918.69
Total payment: $1,050,729
Total interest: $600,729
Payoff timeline: 360 months
ARM scenario
Initial payment: $2,484.92
Post-reset payment: $2,997.28
Total payment: $1,048,280
Total interest: $598,280
Total interest difference spotlight
$2,449 less with ARM (vs Fixed)
Positive means ARM costs more interest than Fixed in this setup. Negative means ARM costs less.
Amortization schedule visualization (first 10 years)
Refinance break-even calculator
Current payment
$2,317.05
Refinanced payment
$2,060.61
Monthly savings
$256.44
Break-even timeline
26 months
Net interest savings after refinance cost
$67,356
This is a planning simulator. It does not include lender-specific fees, PMI, escrow, rate caps, points, or tax filing constraints. Review actual loan disclosures before making final financing decisions.
Refinance module inputs
Why this simulator beats generic mortgage calculators
Generic tools answer only one question: What is my monthly payment? This page is designed for the real decision: Which financing path leaves me with less total cost and less interest risk?
It combines rate structure comparison (Fixed vs ARM), cash-flow strategy (extra principal), and timing strategy (refinance break-even) in one planning surface.
Feature depth map
1) Fixed vs ARM lifecycle view
Compares initial ARM benefit against post-reset cost pressure over the full loan timeline.
2) Extra payment strategy testing
Quantifies how incremental monthly principal changes payoff speed and lifetime interest.
3) Refinance viability check
Converts closing costs into break-even months, then shows net savings after costs.
Decision matrix (at-a-glance)
| Question | Metric to watch |
|---|---|
| Is ARM still cheaper after reset? | Total interest difference spotlight |
| Should I pay extra principal monthly? | Payoff months + total interest drop |
| Does refinancing actually pay off? | Break-even months + net savings |
| How does tax treatment affect cost? | After-tax interest view |
Scenario storyboard (example planning flow)
Step 1
Baseline choice
Start with 30Y Fixed and 5/1 ARM using the same loan amount.
Step 2
Stress with extra pay
Add +$100 to +$500 monthly principal and observe interest compression.
Step 3
Refi trigger test
Model possible refinance rates and check break-even horizon.
Step 4
Tax-aware final review
Toggle tax adjustment for a realistic after-tax cost perspective.
FAQ for high-intent mortgage users
When does ARM usually become risky?
ARM risk increases when the post-reset APR rises significantly and you hold the mortgage beyond the intro period. Compare total interest, not just initial monthly savings.
How do I decide if extra payment is worth it?
If your guaranteed mortgage-rate savings exceeds your risk-free alternatives, extra principal can be attractive. Use this simulator to quantify payoff-month reduction and lifetime interest savings.
Is refinance always good when rates drop?
Not always. Closing costs can erase gains if you move or sell early. Break-even months and net savings after costs are the key checkpoints.