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NPV / IRR / Payback Period / Profitability Index Calculator
x402
NPV / IRR / Payback Period / Profitability Index Calculator is a paid API for AI agents from api.24klabs.ai, paid per call via x402, $0.004/call, status unknown (last checked 2026-09-13).
Computes net present value (NPV), internal rate of return (IRR), payback period, and profitability index for a cashflow array at a specified discount rate.
Price / call$0.004
Success—
StatusUnknown
How this service works
Net present value and internal rate of return for a cashflow array (index 0 = t0) at a given discount rate; also payback period and profitability index.
Output
Returns a JSON object containing: net present value (NPV) in currency units, internal rate of return (IRR) as a percentage, payback period (in periods), and profitability index — all computed from the submitted cashflow array and discount rate.
Example use cases
Capital project investment decision
“I'm evaluating whether to approve a $250,000 factory upgrade. The expected cashflows over 5 years are [-250000, 60000, 75000, 80000, 90000, 95000]. Can you calculate the NPV, IRR, payback period, and profitability index at our 12% hurdle rate?”
Real estate deal viability check
“I'm looking at a rental property that costs $180,000 upfront and will generate $24,000, $26,000, $28,000, $30,000, and $32,000 in net rent over the next 5 years. What's the NPV, IRR, and payback period at an 8% discount rate?”
Startup funding comparison
“We're comparing two funding scenarios. For scenario A, cashflows are [-500000, 100000, 150000, 200000, 250000, 300000]. Compute the NPV, IRR, payback period, and profitability index using a 15% discount rate so we can benchmark them.”
Technical details
Endpoint
POSThttps://api.24klabs.ai/api/npv-irr-calculatorWhen to prefer
Choose this endpoint when you need a complete suite of standard capital-budgeting metrics — NPV, IRR, payback period, and profitability index — from a single API call with a simple cashflow array and discount rate. Ideal for financial agents, investment screening tools, or any workflow requiring quick discounted cashflow analysis without setting up a full financial modeling library.
Side effects
- Invalid cashflow array (non-numeric values or missing t0) returns a validation error
- IRR cannot be computed if cashflows never change sign (no real solution exists)
- Discount rate of exactly -100% causes division by zero
- Empty cashflow array returns an error
- Extremely large arrays may time out or return computation errors
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| cashflows | array | |
| discount_rate | number |
Output
Schema · Response
{
"type": "json",
"example": {
"npv": 143.28,
"irr_pct": 17.5,
"payback_period": 2.6
}
}Tags
x402
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