Written Down Value Depreciation: The Complete WDV Method Guide for JAIIB AFM 2026

If one topic decides your marks in Accounting &. Financial Management for Bankers (AFM). It is depreciation.

And within depreciation. Written down value depreciation is the single most tested method in the JAIIB exam. Get the WDV method right.

And three to five marks become almost guaranteed.

This guide breaks the written down value method down completely. You get the concept. The formula.

Solved numericals. A clean SLM vs WDV comparison. And the exact mistakes that cost candidates marks.

Read it once, practise twice, and depreciation will never scare you again.

What Is Depreciation? A Quick Refresher

Depreciation is the gradual. Continuing fall in the book value of a fixed asset. It happens due to the passage of time. Constant use, wear and tear, and obsolescence.

In simple words. Depreciation spreads the cost of an asset across its useful life. Instead of writing off the full cost in one year.

You write it off in parts. This gives a business more control over its finances. Shows a truer profit each year.

The number of years over. An asset is depreciated depends on its useful life. A laptop may be useful for around four years.

While plant and machinery may last much longer. For tax purposes. Assets are grouped into classes.

And each class has its own prescribed life. Always confirm the exact rates on the latest official IIBF notification. The Income Tax rules.

Why Depreciation Matters for Bankers

As a banker, you read balance sheets daily. Depreciation directly affects an asset's value. The firm's profit, and its tax liability.

Understanding it helps you assess loan proposals. The financial health of a borrower. That is exactly why AFM tests it so heavily.

The Four Main Methods of Depreciation

Before we focus on WDV. Here are the depreciation methods you should recognise for the exam:

1. Straight-Line Method (SLM) – equal depreciation every year.
2. Unit of Production Method – based on actual output or usage.
3. Written Down Value Method (WDV) – also called the Declining Balance Method.
4. Double-Declining Balance Method (DDBM) – an accelerated version of WDV.

This article focuses on the third one: written down value depreciation. The method most loved by examiners.

What Is the Written Down Value Method?

Under the written down value method. Depreciation is charged on the book value of the asset every year. Not on the original cost.

Book value means cost minus depreciation charged so far. This book value is the “written down value&rdquo. Of the asset.

Because the book value keeps shrinking every year. The depreciation amount also keeps shrinking. The rate stays fixed, but the base it applies to gets smaller. That is the whole idea behind the Diminishing Balance Method.

Other Names You Must Remember

Examiners often test terminology. The WDV method is also known as:

• Diminishing Balance Method
• Reducing Instalment Method
• Declining Balance Method

Written Down Value Depreciation Formula

There are two formulas you need. The first finds the rate of depreciation. The second applies that rate each year.

1. Rate of depreciation under WDV:

Depreciation Rate = 100 × [ 1 − n√(S / C) ]

Where:

• n = number of years of useful life
• S = salvage (scrap) value at the end of life
• C = cost of the asset

2. Annual depreciation:

Depreciation for the year = Rate × Opening Book Value of that year

The opening book value of each year is the closing book value of the previous year. Keep chaining it down, year after year.

WDV Method Solved Example (Step by Step)

Let us make the written down value depreciation calculation crystal clear with a worked example.

Problem: A machine costs Rs 1,00,000. Depreciation is charged at 20% per annum under the WDV method. Find the depreciation and book value for the first three years.

Notice the pattern. Depreciation falls every year: Rs 20,000, then Rs 16,000, then Rs 12,800. The rate is fixed at 20%, but the base keeps reducing. This is the heart of written down value depreciation.

WDV vs Straight-Line Method (SLM): The Key Comparison

The exam loves to compare WDV with SLM. Memorise this table and you can answer almost any conceptual question.

Suitability: When Should You Use the WDV Method?

The written down value method suits assets that give more efficiency in the early years. Lose value faster as they age. The asset delivers more benefit to the business in its initial years than later.

This method is commonly used for:

• Plant and machinery
• Fixtures and fittings
• Motor vehicles

Because heavy usage and high repair costs come later. Charging more depreciation early makes the WDV method the most logical choice for these assets.

Advantages of the Written Down Value Method

• It recognises the risk of obsolescence by charging most depreciation in the early years.
• Income-tax authorities in India accept this method, making it practical for businesses.
• It balances total cost over time. Early years carry high depreciation but low repairs. Later years carry low depreciation but high repairs.
• It matches expenses with the higher revenue an asset earns early in its life.

Disadvantages of the Written Down Value Method

• It ignores the interest on capital invested in the asset.
• The book value can never be reduced to zero. Even after the asset is useless.
• Calculating the exact rate using the formula can be tedious without a calculator.

Significance of the WDV Method

The written down value method is the best fit when an asset faces a real risk of becoming outdated. It provides a fair value of the asset once it has served most of its useful life.

By charging heavy depreciation early and lighter depreciation later. The method matches expenses with the usage the asset actually delivers. This makes financial statements more realistic and helps in honest profit measurement.

How to Study Depreciation for JAIIB AFM (Practical Plan)

Theory alone will not get you marks. Depreciation is a practical, numerical topic. Follow this simple plan:

1. Lock the concept first. Understand why book value reduces. Do not memorise blindly.
2. Master both formulas. Write them ten times until they are automatic.
3. Solve a fixed-rate problem daily. Build the year-by-year table like the example above.
4. Practise rate-finding sums. Use the n√(S/C) formula on real numbers.
5. Compare WDV with SLM in every problem to lock the difference.
6. Attempt timed mock tests. Speed and accuracy decide your final score.

Regular practice with quality mock tests turns this topic into easy, guaranteed marks. You can also strengthen weak areas with our free guides on AFM concepts.

Common Mistakes to Avoid in WDV Problems

These small errors cost big marks. Avoid them:

• Applying the rate on original cost. In WDV, always use the reducing book value, not the cost.
• Deducting salvage value before applying the rate. In yearly WDV calculation, salvage is ignored.
• Forgetting to carry forward the closing balance. Each year's opening value is last year's closing value.
• Mixing up SLM and WDV. Read the question carefully before you start.
• Rounding too early. Round only at the final step to keep your answer accurate.
• Ignoring the part-year rule. If an asset is bought mid-year. Charge depreciation only for the months used, unless the question says otherwise.

Frequently Asked Questions (FAQ)

What is written down value depreciation in simple words?

It is a method where a fixed percentage of depreciation is charged on the reducing book value of an asset each year. So the depreciation amount is highest in the first year. Falls steadily after that.

Why does the WDV method never reduce book value to zero?

Because depreciation is always a percentage of the remaining book value. A percentage of any positive number is still positive. So a small balance always stays. The value can only approach the salvage value, not zero.

Is the WDV method better than the straight-line method?

It depends on the asset. WDV is better for assets that lose value fast. Need heavy early depreciation.

Like machinery and vehicles. SLM is better for assets with steady, even usage. Both are valid for different situations.

Is the written down value method allowed for income tax in India?

Yes. The Income Tax framework in India generally follows the WDV method for most asset blocks. For exact rates and the latest rules. Always confirm on the latest official IIBF notification. Current Income Tax provisions.

How important is depreciation for the JAIIB AFM exam?

Very important. Depreciation. Especially the WDV method. Is among the most frequently asked numerical topics in AFM. A few hours of focused practice can secure several easy marks for you.

Final Word: Turn Depreciation Into Your Strong Suit

The written down value method is not hard. It is just a fixed rate applied to a shrinking base. Year after year. Once you internalise that one idea. Every WDV problem becomes a quick, mechanical win.

Lock the concept, memorise both formulas, and practise daily. Depreciation can move from a feared topic to your favourite scoring area in AFM. Start today, stay consistent, and walk into your JAIIB exam with confidence. You have got this.

Related Guides

For more on written down value depreciation. See the official IIBF circulars. Our chapter-wise free notes on iibf.store.