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Refi Break-Even Calculator
x402
Refi Break-Even Calculator is a paid API for AI agents from x402.agentutility.ai, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).
Calculates how many months it takes to recoup mortgage refinance closing costs and computes net savings over a specified hold horizon.
Price / call$0.01
Success—
StatusUnknown
How this service works
Calculates how many months a mortgage refinance takes to pay back its closing costs. Same backend as refinance-analysis-calculator, focused on break-even months, net savings over hold horizon, and payment delta. Use it as a refi break-even calculator, closing-cost payback calculator, or mortgage refinance savings API.
Output
Returns the number of months until refinance closing costs are fully recouped, the monthly payment delta between old and new rates, and the total net savings (or loss) over the specified hold horizon in dollars.
Example use cases
Homeowner evaluating rate drop
“My current mortgage balance is $420,000 at 6.9% and my lender is offering 5.8%. Closing costs are $7,200. I'm planning to stay in the house at least 7 years — can you calculate when I'd break even and how much I'd save overall?”
Agent advising on short-term hold
“I'm thinking about refinancing from 7.5% to 6.5% on a $280,000 loan. Closing costs are $5,000 but I might sell in 3 years. Tell me the break-even point and whether I'd actually come out ahead.”
Monthly payment reduction check
“We have a $500,000 loan at 7.25% and can refi to 6.0% with $9,000 in closing costs. We're staying put for 10 years — what's the monthly payment difference and when do we recoup those costs?”
Technical details
Endpoint
POSThttps://x402.agentutility.ai/refi-break-even-calculatorWhen to prefer
Use this endpoint when you need a fast, focused break-even and savings computation for a single mortgage refinance scenario. Prefer it over a full refinance-analysis-calculator when the user only needs to know payback months, payment delta, and net savings — not a comprehensive amortization table or side-by-side loan comparison. Best suited for quick yes/no refi decisions driven by closing cost payback period.
Side effects
- Missing required inputs (loan balance, rates, closing costs) returns a validation error
- New rate higher than or equal to current rate may return zero or negative savings with a warning
- Extremely short hold horizons where break-even is never reached return an indication that refinancing is not beneficial
- Invalid numeric values or negative inputs return a 400-level error
- Payment failure or insufficient USDC balance returns a 402 error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"grade": "strong",
"score": 72.4,
"source": "deterministic in-process finance calculator; no upstream API",
"drivers": [
{
"name": "break_even",
"note": "16.1 months to break even",
"score": 67.8,
"weight": 0.25
}
],
"metrics": {
"monthly_savings": 384.24,
"break_even_months": 16.1,
"new_monthly_payment": 2576.9,
"current_monthly_payment": 2961.14
},
"warnings": [],
"calculator": "refinance-analysis-calculator",
"recommendation": "Proceed with standard diligence and covenant checks."
}
}Tags
x402
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