Written Down Value Method in JAIIB AFM: Formula, Case Study & Solved Examples

The Written Down Value Method is one of the most heavily tested depreciation concepts in the JAIIB Accounting. Financial Management (AFM) exam. If you can solve a clean WDV case study under exam pressure.

You protect easy marks that many candidates lose to silly calculation slips. This 2026 guide breaks the topic down from first principles. Walks you through a fully solved case study.

And shows you exactly how examiners frame the questions.

What Is the Written Down Value Method?

The Written Down Value Method of depreciation calculates depreciation as a fixed percentage of the asset's book value at the start of each year. As the book value shrinks year after year. The depreciation amount shrinks with it.

This is the opposite of the Straight-Line Method (SLM). Where you write off the same fixed amount every single year. Because real assets — machinery.

Vehicles. Computers — tend to lose more value early in their life. The WDV method often mirrors economic reality more closely.

You will also see it called the Reducing Balance Method or the Diminishing Balance Method. All three names describe the same idea: a constant rate applied to a falling balance.

Why the WDV Method Matters for Banking Professionals

For a banker, depreciation is not just an accounting entry. It directly affects the numbers you rely on when you appraise a loan or read a balance sheet.

• Credit appraisal: The depreciation method changes a borrower's reported profit. Net block. Which feeds into ratios like debt-equity and return on assets.
• Taxation: The Indian Income Tax Act mandates the WDV method (block-of-assets approach) for most fixed assets. So understanding it is essential for tax-affected cash flows.
• Asset valuation: When a bank takes plant or machinery as security. The written-down value gives a realistic carrying amount rather than an inflated one.

That is why the JAIIB AFM syllabus places depreciation under its Accounting and Financial Management module and tests it almost every cycle. Reinforce the theory with timed mock tests so the calculation becomes second nature.

The Written Down Value Formula

The working formula you will use in the exam is short. Memorable:

The closing WDV of one year becomes the opening WDV of the next. That single rule is the engine behind every WDV case study.

When the rate of depreciation is not given. The salvage value and useful life are. You can derive the rate with this formula:

In most JAIIB questions the rate is given directly. So you can apply the simpler year-by-year method. If you are shaky on the derived-rate version. Flag it to confirm on the latest official IIBF notification. Study material for the format expected in your attempt.

Written Down Value Method: Solved Case Study

Let us work through a typical exam-style problem. This is the kind of WDV case study you can expect in JAIIB AFM.

Apply the formula one year at a time. Each year you take 20% of the opening balance, not the original cost.

1. Year 1: Depreciation = ₹1,00,000 × 20% = ₹20,000. Closing WDV = ₹1,00,000 − ₹20,000 = ₹80,000.
2. Year 2: Depreciation = ₹80,000 × 20% = ₹16,000. Closing WDV = ₹80,000 − ₹16,000 = ₹64,000.
3. Year 3: Depreciation = ₹64,000 × 20% = ₹12,800. Closing WDV = ₹64,000 − ₹12,800 = ₹51,200.

Notice the pattern: depreciation falls from ₹20,000 to ₹16,000 to ₹12,800. That declining charge is the signature of the WDV method.

Depreciation Schedule at a Glance

A quick exam tip: if a question only asks for the book value after n years. You can shortcut the table using Closing WDV = Cost ×. (1 − rate)n. Here, ₹1,00,000 × (0.80)3 = ₹51,200 — the same answer, in one step.

WDV Method vs Straight-Line Method

Examiners frequently test whether you can tell these two methods apart. Keep this comparison handy.

If you want a deeper side-by-side, read our companion free guides on the Straight-Line Method case study before moving on.

Advantages and Limitations of the WDV Method

Advantages

• Realistic matching: Higher depreciation early on mirrors how machinery. Technology actually lose value.
• Tax efficiency: Larger write-offs in the early years reduce taxable income sooner. Easing cash flow.
• Regulatory acceptance: Aligns with the Indian Income Tax Act. Is consistent with depreciation principles under Ind AS 16 / AS 10 on property. Plant and equipment.
• Balanced total cost: As depreciation falls. Repair costs usually rise. So the combined charge stays fairly even over the asset's life.

Limitations

• Never fully written off: The book value approaches but never reaches zero.
• More complex math: Year-by-year recomputation is heavier than the single SLM figure.
• Higher early burden: Front-loaded depreciation can depress reported profit in an asset's first years.

How to Solve WDV Questions in the Exam: A 5-Step Method

Use this repeatable routine so you never freeze on a depreciation problem.

1. Note the cost and rate. Underline the original cost and the depreciation percentage in the question.
2. Always start from the opening balance. For year one that is the cost. Afterwards it is the previous year's closing WDV.
3. Apply the rate. Multiply the opening WDV by the rate to get that year's depreciation.
4. Subtract to get closing WDV. Carry this figure forward as next year's opening balance.
5. Use the power shortcut when only the final book value is asked: Cost ×. (1 − rate)n.

Practise three or four problems with this exact sequence and the method becomes automatic. Pair it with our mock tests to build speed under a timer.

Common Mistakes to Avoid

• Applying the rate to original cost every year. That turns WDV into a fixed charge — the single biggest error. Always use the opening balance.
• Forgetting to carry forward the closing WDV. Year 2 must start from Year 1's closing value, not the cost.
• Mixing up SLM and WDV rates. A 20% SLM rate and a 20% WDV rate produce very different schedules.
• Pro-rating errors. If an asset is bought mid-year. Depreciation may need to be charged for part of the year &mdash. Check the question wording.
• Rounding too early. Round only at the final answer to avoid compounding small errors across years.

Frequently Asked Questions (FAQ)

What is the Written Down Value Method in simple terms?

It is a depreciation method that charges a fixed percentage on the asset's reducing book value each year. Because the base falls annually. The depreciation amount also falls. Giving high charges early and low charges later.

Is the Written Down Value Method the same as the Reducing Balance Method?

Yes. "Written Down Value Method". "Reducing Balance Method". "Diminishing Balance Method" are different names for the same technique &mdash. A constant rate applied to a declining balance.

Why does the asset value never become zero under WDV?

Because you always take a percentage of a positive opening balance. The result keeps shrinking but never hits zero. Each year you remove only a fraction of what remains. So a small residual value always survives.

Which is better for JAIIB problems, WDV or SLM?

Neither is universally "better" &mdash. The right method depends on the asset and the question. For the exam. Focus on solving whichever method the problem specifies accurately. And on clearly explaining the difference if a theory question asks for it.

Is the WDV method allowed under Indian tax law?

Yes. The Indian Income Tax Act generally requires the WDV (block-of-assets) method for most fixed assets. For the exact rates and any exceptions relevant to your attempt. Confirm on the latest official IIBF notification and current tax provisions.

Conclusion: Turn WDV Into Guaranteed Marks

The Written Down Value Method rewards candidates who practise. The theory is small. The formula is short, and the case studies follow a predictable pattern.

Master the five-step routine. Memorise the comparison table. And avoid the common mistakes &mdash.

And these become some of the safest marks in the entire JAIIB AFM paper.

Stay consistent, solve a few problems daily, and review your errors. With steady effort. Depreciation will shift from a feared topic to one of your strongest. Your JAIIB success is built exactly this way &mdash. One well-understood concept at a time.

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