Navigating Through Depreciation Methods in Accounting

Every business that buys a machine, vehicle, or piece of equipment faces the same accounting question: how do you fairly record the cost of an asset that will be used for many years? Charging the entire purchase price in year one would distort profits. Ignoring the asset’s gradual decline would inflate them. The answer lies in depreciation, and more specifically, in choosing the right method to spread that cost over the asset’s useful life. The two methods that dominate Indian accounting practice, the Straight Line Method and the Written Down Value Method, each tell a different story about how an asset loses its value, and each has a direct effect on the Profit and Loss Account.

What depreciation really means 🔗

Depreciation is the systematic allocation of an asset’s cost over the years it is expected to serve the business. It captures the steady erosion of value caused by wear and tear, usage, the passage of time, and obsolescence. The word itself comes from the Latin depretium, where de means decline and pretium means price, which neatly captures the idea of a falling price over time.

For accounting purposes, depreciation matters because it follows the matching principle. The cost of an asset that helps generate revenue across several years should be recognised in the same years that revenue is earned, not just in the year the asset was purchased. Schedule II of the Companies Act, 2013 defines depreciation as the systematic allocation of the depreciable amount of an asset over its useful life, where the depreciable amount is the cost of the asset less its residual value. Three numbers therefore drive every depreciation calculation: the original cost, the estimated useful life, and the expected residual or scrap value at the end.

The Straight Line Method 🔗

The Straight Line Method, often abbreviated as SLM, is the simplest and most widely used approach. It assumes that an asset loses an equal amount of value every year of its working life. The same depreciation expense appears in the Profit and Loss Account year after year, until the asset’s book value falls to its residual value.

Formula and a quick example 🔗

The formula is refreshingly simple:

Annual Depreciation = (Cost of Asset – Residual Value) ÷ Useful Life

Suppose a hotel buys a commercial dishwasher for ₹60,000. The expected residual value is ₹10,000 and the useful life is five years. The annual depreciation under SLM works out to (60,000 – 10,000) divided by 5, or ₹10,000 each year. The same ₹10,000 will be charged to the Profit and Loss Account in years one through five, and at the end of year five the dishwasher will sit on the books at its residual value of ₹10,000.

Why SLM is so widely used 🔗

SLM is loved for its predictability. It works best when an asset delivers a fairly uniform benefit across its life, such as buildings, office furniture, storage facilities, and basic machinery. Because the depreciation expense is constant, profit figures are not pushed around by the choice of method, which makes year-on-year comparison cleaner. Budgeting is also easier because the finance team knows exactly what the depreciation line will look like.

SLM is also intuitive. There is no compounding, no shifting base, and no complicated rate calculation. A junior accountant can compute it in seconds, which reduces the risk of errors and audit queries.

Where SLM falls short 🔗

The simplicity comes with a trade-off. Real assets rarely lose value in equal slices. A new vehicle, for instance, drops sharply in resale value the moment it leaves the showroom and continues to slide quickly in its early years. SLM cannot reflect that pattern. It also tends to under-depreciate assets that become obsolete fast, like computers and electronic equipment, leading to a book value that may sit higher than the asset’s actual market worth.

The Written Down Value Method 🔗

The Written Down Value Method, also called the Reducing Balance Method or Diminishing Balance Method, takes a very different view of how value erodes. Instead of charging the same amount each year, it applies a fixed percentage to the asset’s reducing book value. The result is a heavy depreciation charge in the early years that gets smaller as the asset ages.

How WDV works in practice 🔗

Imagine a tour operator buys a vehicle for ₹1,00,000 with a depreciation rate of 20% per year. In year one, depreciation is 20% of ₹1,00,000, which is ₹20,000, leaving a written-down value of ₹80,000. In year two, the 20% rate is applied to ₹80,000, giving ₹16,000 of depreciation and a closing book value of ₹64,000. In year three, depreciation drops further to ₹12,800 on the reduced base of ₹64,000. The pattern continues with progressively smaller charges, and the book value theoretically never reaches zero.

Why WDV reflects reality for many assets 🔗

WDV mirrors how many real-world assets actually behave. A new truck, a fleet of laptops, or kitchen equipment in a hotel typically delivers its highest productivity in the first few years and then needs more repairs and downtime as it ages. By front-loading depreciation, WDV captures this declining usefulness. It is therefore particularly suited to assets that lose value quickly, such as technology or equipment vulnerable to obsolescence.

There is also a tax angle that matters in India. The Indian Income Tax Act approves the Written Down Value method for tax depreciation, applying it to the asset’s diminishing book value each year. So while a company can choose either method for accounting purposes, it will almost always need to compute WDV-based depreciation for its income tax return regardless.

Limitations to keep in mind 🔗

WDV is more complex to compute, particularly when assets are added or sold mid-year. The book value never quite reaches zero, which can be awkward for assets that have genuinely been written off. And because depreciation is heavy in the early years, profits in those years look thinner than under SLM, which can affect dividend decisions and performance metrics if not understood properly.

How the choice flows into the Profit and Loss Account 🔗

The depreciation figure ultimately lands as an expense on the debit side of the Profit and Loss Account, reducing reported profit for the year. The size of that figure depends entirely on which method the business has chosen.

Take that same ₹1,00,000 vehicle. Under SLM with a five-year life and zero residual value, depreciation would be a flat ₹20,000 every year. Under WDV at 20%, the year-one charge would also be ₹20,000, but year two would drop to ₹16,000 and year three to ₹12,800. The total expense recognised over five years can be similar, but the timing is dramatically different. WDV depresses early-year profits and lifts later-year profits compared with SLM.

This timing difference influences several real decisions. Earnings-based bonuses, debt covenants tied to profit ratios, dividend distributions, and even tax planning can all turn on which method is in use. A young company aiming to show steady, predictable profits to investors may prefer SLM. A more mature company looking to claim faster expense recognition for tax-aligned reporting may prefer WDV.

The legal framework in India 🔗

Indian companies do not pick depreciation methods in a vacuum. Schedule II of the Companies Act, 2013 prescribes the useful life of various tangible assets and caps the residual value at 5% of the asset’s original cost. Importantly, the Act moved away from the old fixed-rate regime of the Companies Act, 1956 and replaced it with a useful-life-based approach. Companies are free to choose between SLM and WDV, but the underlying useful life and residual value must be consistent with Schedule II unless a technical justification is disclosed for any deviation.

The Act does not prescribe fixed depreciation rates; rates are derived from the useful life specified in Schedule II Part C, and any deviation must be disclosed and justified with technical advice. There is also a practical reporting requirement: the method used must be disclosed in the financial statements, and once chosen, it should be applied consistently from year to year.

Other methods worth knowing about 🔗

While SLM and WDV dominate textbooks, Schedule II also recognises specialised methods for particular industries. The Institute of Chartered Accountants of India lists Straight Line, Reducing Balance, Sum of Years’ Digits, Machine Hour Rate, Production Units, and Depletion methods as accepted approaches. Hospitality and tourism businesses occasionally use the production units method for kitchen equipment with measurable output, while transport businesses may use machine hour rates for fleet vehicles. The depletion method applies to natural resources like mines and quarries.

Choosing the right method for the business 🔗

The choice between SLM and WDV is rarely about which is technically superior. It is about which method most faithfully represents how a particular asset is being consumed and how the business wants its financial story to read.

SLM suits assets with steady, even productivity over their lives. Hotel buildings, banquet furniture, decorative fittings, and office equipment that work uniformly year after year are good candidates. WDV suits assets that bring most of their value early and then taper off. Vehicles, computers, kitchen equipment in a busy restaurant, audio-visual systems in conference halls, and rapidly evolving technology fit this profile.

Many companies, in fact, use both methods, applying SLM to one class of assets and WDV to another, as long as the choice is disclosed and applied consistently within each class. What is not acceptable is switching methods opportunistically to manage reported profits, since that breaches the principle of consistency that auditors take seriously.

A note for tourism and hospitality managers 🔗

Tourism and hospitality operations carry a particularly diverse asset base. A single resort may own buildings, vehicles, kitchen equipment, soft furnishings, IT systems, and recreational facilities, each ageing at a different pace. Treating all of them with one blanket method would distort the Profit and Loss Account in ways that hide the real economics of the operation. Component accounting under Schedule II actually requires significant parts of an asset with different useful lives to be depreciated separately, which makes thoughtful method selection even more important in this sector.

Sound depreciation accounting also feeds straight into capital replacement planning. A manager who knows how quickly each category of asset is being written down has a clearer view of when refurbishment will be needed and how much cash will need to be set aside. In an industry where guest experience depends heavily on the condition of physical assets, that visibility is not a small thing.

What do you think? If you were managing a mid-sized hotel with a mix of new IT equipment, a decade-old building, and a fleet of guest transfer vehicles, which method would you choose for each category, and why? And how would your choice change if your priority shifted from steady reported profits to faster cost recovery?

References

1. https://www.geeksforgeeks.org/accountancy/difference-between-straight-line-and-written-down-value-method-of-calculating-depreciation/
2. https://upload.indiacode.nic.in/schedulefile?aid=AC_CEN_22_29_00008_201318_1517807327856&rid=9
3. https://cleartax.in/s/methods-of-depreciation
4. https://www.angelone.in/knowledge-center/personal-finance/straight-line-method
5. https://www.jiraaf.com/blogs/general/written-down-value
6. https://testbook.com/ugc-net-commerce/advantages-of-straight-line-method-and-written-down-value-method
7. https://www.registerkaro.in/post/depreciation-rates-as-per-companies-act-2013
8. https://tallysolutions.com/business-guides/depreciation-rate-companies-act-2013/
9. https://live.icai.org/bos/vcc/pdf/Depreciation_notes.pdf