When you are architecting a financial model for a corporation operating under strict French accounting protocols, standard US-based depreciation algorithms (like SYD or SLN) are mathematically illegal. French law requires a highly specialized, accelerated depreciation calculus where a rigid depreciation coefficient is applied based on the absolute lifespan of the asset. To force the Microsoft Excel engine to execute this exact, localized financial math, you must deploy the AMORDEGRC function.
Understanding the AMORDEGRC Architecture
The AMORDEGRC (Amortissement Dégressif) function is a deeply specialized accounting engine. It calculates the exact depreciation of an asset for any specific accounting period using a French declining balance method. Crucially, the engine algorithmically scales the depreciation rate using a legally mandated coefficient (e.g., 1.5 for a 3-4 year life, 2.0 for 5-6 years, and 2.25 for anything longer).
The syntax is highly complex and requires exactly seven mandatory arguments: =AMORDEGRC(cost, date_purchased, first_period, salvage, period, rate, basis)
- cost: The absolute initial purchase price.
- date_purchased: The exact chronological date you acquired the asset.
- first_period: The exact date of the end of the very first accounting period.
- salvage: The estimated value at the end of the asset’s life.
- period: The specific period (integer) for which you are extracting the depreciation.
- rate: The absolute annual rate of depreciation.
- basis: The day-count protocol (e.g., use 1 for Actual/Actual, or 3 for a 365-day year).
Executing the French Calculus
Imagine you purchased server hardware for €100,000 (A1) on August 15, 2026 (A2). Your first period ends December 31, 2026 (A3). The salvage value is €10,000 (A4). The annual rate is 15% (A6), and you use a 365-day basis (A7). You need the depreciation for Period 1 (A5 = 1).
=AMORDEGRC(A1, A2, A3, A4, A5, A6, A7)The exact millisecond you press Enter, the Excel engine ingests the dates, calculates the exact pro-rated timeframe for the first period, applies the French legal coefficient based on the rate, and outputs the absolute Euro amount of depreciation for that highly specific window.