After-tax cost of debt API

After-tax cost of debt Rd*(1-Tc), with the pre-tax rate supplied directly or derived as interestExpense/totalDebt, returning the tax shield. Deterministic and auditable. Answers 'after-tax cost of debt at 6% and 21% tax','cost of debt from interest expense','what is the debt tax shield'.

Price$0.01per request

MethodPOST

Route/v1/calc/val-cost-of-debt

StatusLive

MIME typeapplication/json

Rate limit120/minute

CacheNo cache

calcvaluationcost-of-debtwacctax-shieldleveragefinanceinterest

API URLhttps://x402.hexl.dev/v1/calc/val-cost-of-debt

Integration docs

Example request

{
  "rate": 0.06,
  "taxRate": 0.21
}

Example response

{
  "pretaxCostOfDebt": 0.06,
  "afterTaxCostOfDebt": 0.0474,
  "afterTaxCostOfDebtPercent": 4.74,
  "formula": "Rd_aftertax = Rd * (1 - taxRate)",
  "breakdown": {
    "pretaxRate": 0.06,
    "taxRate": 0.21,
    "taxShield": 0.0126
  }
}

Input schema

{
  "type": "object",
  "required": [
    "taxRate"
  ],
  "properties": {
    "rate": {
      "type": "number",
      "description": "Pre-tax cost of debt as a decimal",
      "examples": [
        0.06
      ]
    },
    "interestExpense": {
      "type": "number",
      "description": "Annual interest expense; supply with totalDebt instead of rate",
      "examples": [
        60
      ]
    },
    "totalDebt": {
      "type": "number",
      "examples": [
        1000
      ]
    },
    "taxRate": {
      "type": "number",
      "description": "Marginal tax rate as a decimal",
      "examples": [
        0.21
      ]
    }
  }
}

Output schema

{
  "type": "object",
  "additionalProperties": true
}