Browse Banking

Exact, Ordinary, and Gross Interest Calculations

Interest calculation terms used to distinguish exact, ordinary, gross, and general interest-computation methods.

Exact, ordinary, and gross interest calculations distinguish how time is counted and whether the interest amount is measured before deductions or adjustments.

Use this branch when an interest amount must be traced from the stated method to the amount shown on a bank statement, loan payoff, note, or accrual schedule.

Key Terms in This Branch

TermWhat it clarifies
Exact InterestInterest based on actual days and a stated annual denominator.
Ordinary InterestInterest often associated with a 360-day year convention.
Gross InterestInterest measured before deductions such as taxes, withholding, or some fees.
Interest CalculationThe broader process of computing interest from rate, balance, time, and method.

Example

A short-term loan can accrue a different dollar amount under an actual-day method than under an ordinary-interest convention. The difference may be small on one transaction, but material across large balances, many accounts, or longer periods.

Common Mistakes

  • Assuming “gross” means the customer actually receives or pays that exact net amount.
  • Treating exact and ordinary interest as interchangeable when the day-count basis differs.
  • Ignoring the dates used in the accrual period.
  • Recomputing interest without checking whether the contract specifies the method.

In this section

Choose a subsection first. Deeper term pages live inside each subsection, which keeps large topic hubs readable.

Exact Interest

Interest calculation method based on actual days and a 365-day year rather than an ordinary 360-day convention.

Gross Interest

Gross interest is interest earned or charged before deducting taxes, fees, withholding, or other reductions.

Interest Calculation

Interest calculation determines the interest earned or owed using principal, rate, time, compounding, and day-count rules.

Ordinary Interest

Ordinary interest calculates simple interest using a 360-day year rather than the actual number of days in a year.

Revised on Sunday, June 21, 2026