Import Demurrage Free Day Gap Tool

Description

Count releaseDay - arrivalDay plus one when arrivalDayCounts.

Trade-finance arithmetic combines supplied fees, exchange factors, timing windows, and reporting bases. A local consistency result does not establish document compliance, contract rights, or bank acceptance.

Count releaseDay - arrivalDay plus one when arrivalDayCounts.

When to use this tool

Use Import Demurrage Free Day Gap when you need one transparent cross-border cost or timing component.

How to use the tool and how it works

Enter arrivalDay, releaseDay, freeDays, chargePerDay, arrivalDayCounts. Use the units and conventions below.
Run the tool. Correct any format, range, or cross-field input error before interpreting the output.
Read elapsedChargeDays, billableDays, cost. Use the output convention below.

Count releaseDay - arrivalDay plus one when arrivalDayCounts. Subtract freeDays with a zero floor and multiply billableDays by chargePerDay.^[1]

Input field	Meaning and units	Accepted input
arrivalDay	Arrival Day	Required. Safe integer.
releaseDay	Release Day	Required. Safe integer.
freeDays	Free Days	Required. Safe integer; minimum 0.
chargePerDay	Charge Per Day	Required. Finite number; minimum 0.
arrivalDayCounts	Arrival Day Counts	Required. Boolean.

Output field	Interpretation	Returned shape
elapsedChargeDays	Elapsed Charge Days	Required. Safe integer.
billableDays	Billable Days	Required. Safe integer.
cost	Cost	Required. Finite number.

json

{
  "input": {
    "arrivalDay": 10,
    "releaseDay": 18,
    "freeDays": 5,
    "chargePerDay": 100,
    "arrivalDayCounts": false
  },
  "output": {
    "elapsedChargeDays": 8,
    "billableDays": 3,
    "cost": 300
  }
}

Limitations and assumptions

The convention and rate are supplied; holidays, tariff schedules, contract exceptions, and actual demurrage liability are not determined.
Inputs must satisfy both the field types and the cross-field conditions above. Invalid input causes an error; a successful false flag or documented placeholder is a different result.
Numeric calculations use binary floating point unless exact decimal-integer arithmetic is explicitly stated. No hidden measurement tolerance or decimal rounding is added; nonfinite or out-of-contract results are rejected. Numeric signed-zero results are exported as zero.

Alternative or Complementary methods

Review the complete transaction, contract, bank terms, and applicable accounting policies before acting on a partial calculation.

References

Calculation and input contract: international-business/import-demurrage-free-day-gap — tool.io

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