Break-Even Analysis for Business Loan implementation

Binding contract

This record describes what an executable surface must bind and validate. It does not claim that a public calculator, package, or production route is deployed.

Record owner

Guth Instruments

Lifecycle

verified-clean

Evidence ID

t5-225

Effect

Computation or source lookup only

Input and validation requirements

• A contribution margin ratio of zero causes division by zero.
• A negative contribution margin ratio produces a nonsensical negative revenue requirement; the input should be greater than zero.
• A ratio greater than 1 or entered as a percentage such as 40 instead of 0.40 indicates invalid or misinterpreted input.
• Monthly, quarterly, and annual debt-service periods must not be mixed.
• The formula does not determine whether the business can achieve the required revenue; no sales forecast, capacity, demand, or other feasibility inputs are defined.
• The formula excludes target profit and may omit fixed operating costs, taxes, fees, reserves, and other debt-related costs.

Required corrections

No binding erratum is attached to this unique-name record. Implementers must still preserve the declared units, domain, and failure behavior.

Inspectable interface fixture

The sample below is evidence for interface and validation tests, not a production implementation.

{
  "inputs": {
    "annual_debt_service": 48000,
    "contribution_margin_ratio": 0.4
  },
  "expected_outputs": {
    "required_incremental_revenue": 120000
  },
  "working": "1. Contribution margin ratio = 0.40.\n2. Required revenue = annual debt service / contribution margin ratio.\n3. Required revenue = 48,000 / 0.40 = 120,000.\n4. Expected result: 120,000 currency units of incremental annual revenue."
}

Other records

Sources and evidence

These pointers bind the page to evidence. They do not grant authority or collapse verification into deployment.

• VERIFIED_LEDGER.json
• evidence-tranche5/tranche5-results.json