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Accounting

The Accounting group contains small, deterministic calculations for applying tax and discount percentages. Use these functions when a mapping needs the mathematical amount or adjusted value and the surrounding configuration already defines the correct business rate and rounding rule.

These functions operate on Extended values. They do not look up tax codes or discount agreements, validate whether a rate is commercially valid, or round a result to a currency precision.

Common tasks​

  • Use TaxInclusive to add a tax percentage to a tax-exclusive value.
  • Use TaxExclusive to remove the same percentage factor from an inclusive value.
  • Use TaxAmount when the required result is the percentage amount calculated from a supplied base.
  • Use Discounted for the value remaining after a discount, or DiscountAmount for the discount component itself.

Important behaviour​

Every entry performs one arithmetic expression and returns the result unchanged. No entry accesses map, module or dataset state, and none has a built-in monetary rounding step. Apply the integration's explicit currency and decimal-place policy after the calculation when exact output precision matters.

Edge cases and quirks​

  • Rates are percentages: pass 15 for 15%, not 0.15.
  • Negative rates and rates above 100% are accepted and calculated literally.
  • TaxExclusive divides by the rate factor. A rate of -100 makes that factor zero; the resulting exception or non-finite value follows the active floating-point environment.
  • TaxAmount calculates a percentage of its input; it does not extract the embedded tax component from a tax-inclusive total.
  • The precision and storage size of Delphi Extended are platform dependent. Results should not be treated as exact decimal currency values.

External references​