Depreciation Methods in Accounting: Complete Guide

Last Updated On -05 Jun 2026

There are long-term assets such as buildings, equipment, machinery, vehicles, and computers in which businesses invest regularly. Over the years, these assets have helped in generating good revenue. However, after a certain period, some of these assets start losing value due to wear, tear, obsolescence, usage, or technological advancements.

Accountants record this reduction in value through depreciation. Here are some of the aspects that are affected by the depreciation:

Tax calculations
Profitability analysis
Asset valuation
Financial statements
Business decision-making

If you are a Commerce student, an ACCA candidate, or a finance professional, you need to learn about depreciation, its implementation, components, and how and when to use it.

What is Depreciation?

The systematic allocation of the value of a tangible asset in a business over its useful lifecycle is referred to as depreciation. Businesses do not identify the asset purchase as a one-time expense; instead, it is expensed over the years when the asset actually generates economic benefits. Below are some examples of depreciable assets:

Machinery
Vehicles
Computers
Furniture
Buildings

The expenses are matched effectively with the generation of revenue of the asset. However, the gap is created when the revenue starts lagging. It also contributes to evaluating the basis risk in finance as a long-term goal.

Types of Depreciation Methods

Below are different types of depreciation methods that are used by businesses. It helps in the evaluation of how a business can meet accounting requirements and the nature of the assets. It also helps in a better understanding of the accumulated depreciation for a business. Below are some of the common types of depreciation, which include:

Straight-Line Method

One of the simplest methods to be used as a depreciation method. Throughout the useful life of the asset, the depreciation expense is evaluated and changed every year.

Written Down Value (WDV) Method

This method is also called the Diminishing Balance Method. On the remaining book value of an asset, depreciation is charged. Over the course of time, depreciation expenses keep decreasing.

Units of Production Method

This method calculates depreciation based on actual usage rather than time. It is suitable for machinery and equipment whose usage varies significantly. When calculating depreciation, these methods are significant for future planning purposes. Businesses can effectively use this method, which will lead to continuing professional development in finance and accounting.

Double Declining Balance Method

The method is also identified as the accelerated depreciation method, which records higher depreciation in the initial years and lower depreciation later. It is often used for assets that lose value rapidly.

Sum-of-the-Years-Digits Method

With this method, the year is accelerated as it allocates more depreciation in the initial years of an asset. It leads to effective evaluation of the life value of the asset.

Methods of Calculating Depreciation

Each depreciation method follows a different calculation approach. The chosen method depends on:

Asset type
Business requirements
Accounting standards
Tax regulations

Among all methods, the Straight-Line Method and WDV Method are the most commonly used in accounting practice. You will require business acumen to effectively calculate the depreciation.

Components of the Depreciation Methods

Several key components are required when calculating depreciation. Here are some of the significant components of these methods:

Asset Cost

When the price of an asset is calculated including transportation and installation costs, it is referred to as the asset cost.

Useful Life

The estimated period during which the asset will generate economic benefits.

Residual Value

The estimated value of the asset in the final years is calculated as the residual value. It is also called salvage value in business finance.

Depreciation Rate

The percentage used to calculate annual depreciation under certain methods. Every year, the depreciation expense is calculated through these components.

Real-Life Example of the Depreciation Method Formula

Here is a real-life example of implementing the straight-line method. For example, a company purchases equipment for INR 6,00,000.

Cost of Asset = INR 6,00,000
Residual value = INR 60,000
Useful Life = 9 years

The formula of straight-Line depreciation is:

Annual Depreciation = Cost of Asset - Residual Value / Useful life

Application of the formula = 6,00,000 - 60,000 / 9 = 5,40,000 / 9 = 60,000

Therefore, the annual depreciation equals INR 60,000. The depreciation expense is recorded as INR 60,000 for the past 9 years by the company.

Benefits of Depreciation Methods

There are several benefits of depreciation methods. With these advantages, businesses can effectively perform and manage asset management. Below are some of the advantages of the types of depreciation models.

Asset Management

Depreciation helps organizations monitor asset usage and replacement cycles.

Improved Budgeting

The budget is improved effectively with the implementation of depreciation. It helps in planning effective future asset allocation, replacement, and management of expenses.

Better Financial Reporting

To perform better financial reporting, the depreciation method helps in presenting a realistic value of assets after accounting. In foreign policy and economic growth, depreciation assumptions will negatively impact.

Accurate Profit Measurement

Expenses are matched effectively with revenues through depreciation integration. The outcome is more specific, thus leading to accurate profit calculations.

Tax Benefits

It is through the depreciation method that tax liability decreases significantly, and the taxable income is also reduced in several jurisdictions.

Limitations of Depreciation Methods

Here are some of the limitations of depreciation methods. Every method can be quite effective; however, there are some gaps or limitations to these methods.

Estimates May Be Inaccurate

Useful life and residual value are often based on estimates. The actual outcome might be different from the estimation.

Does Not Reflect Market Value

Depreciation records accounting value, not necessarily the asset's market value.

How and When to Use It?

Companies should select depreciation methods that are based on the nature of an asset and its usage patterns. Even financial compliance becomes effective when the depreciation methods are implemented. Here are some of the ways of the implementation process and specific situations where the depreciation method is implemented.

The straight-line method is used when the asset usage is consistent and simplicity is preferred. When financial reporting requires stable expenses, this method is implemented.
Use the WDV method when the assets lose value rapidly, along with higher initial depreciation, which is appropriate.
Use the Units of Production Method when asset utilization varies significantly. Additionally, output determines wear and tear regarding the asset valuation in organizations.

Wrapping Up!

In conclusion, depreciation is a significant accounting concept that reflects how businesses can allocate the asset costs accurately. It also helps in the evaluation of the value of assets over time, leading to the development of present reliable financial information. With the valuation, companies can invest in long-term assets, leading to a critical component of financial and accounting decision-making.