Depreciation and Fixed Assets: A Small-Business Primer

Buy a laptop for your business and the full cost does not become this year's expense — at least not for tax. Buy a machine for Rs.5 lakh and you cannot simply knock Rs.5 lakh off this year's profit either. Both are fixed assets, and their cost is spread across the years they will serve you, through depreciation. Understanding depreciation matters for two reasons: it changes how much profit you report, and it changes how much tax you pay — without any extra cash leaving your account. This primer covers what counts as a fixed asset, how depreciation works, the two Indian regimes (Income Tax Act and Companies Act), the methods involved, and a worked example.

Fixed assets versus expenses

A fixed asset is something you buy to use in the business over several years, not to consume immediately or resell. Machinery, computers, office furniture, vehicles, and equipment are fixed assets. The defining test is durability and purpose: it lasts well beyond the current year and it helps you operate rather than being sold on.

Contrast that with revenue expenses — rent, salaries, raw materials, electricity, stationery. These are consumed in the period and fully deducted from that period's profit.

The distinction drives the accounting:

• A revenue expense is deducted in full this year.
• A fixed asset is capitalised (recorded as an asset) and its cost is written off gradually as depreciation over its useful life.

Getting this boundary wrong is one of the most common small-business accounting errors, and we return to it under mistakes. For the broader habit of recording costs correctly, see Business Expense Tracking.

What depreciation actually is

Depreciation is the systematic allocation of an asset's cost over the period it is used. If a machine costs Rs.5,00,000 and serves the business for several years, charging the whole Rs.5,00,000 to the year of purchase would unfairly crush that year's profit and flatter every later year. Depreciation instead recognises a portion of the cost each year, matching the expense to the years that benefit.

Crucially, depreciation is a non-cash expense. You paid the cash once, at purchase. In every subsequent year, depreciation lowers your reported profit but no money leaves your account for it. That is what makes it powerful at tax time: it reduces your taxable profit — and therefore your tax — while consuming no cash that year. It effectively shields some of your income from tax in recognition of the capital you have already deployed. To see exactly where depreciation sits in your numbers, read Reading a Profit & Loss Statement — it appears as an expense above the profit line.

The two methods: WDV and straight-line

There are two principal ways to spread the cost:

Written-Down Value (WDV) — the reducing-balance method. Depreciation each year is a fixed percentage of the asset's remaining (written-down) value, not its original cost. Because the base shrinks each year, the depreciation amount is largest in year one and tapers off. This front-loads the expense, which often mirrors how assets actually lose value and how they are most productive early on. The Income Tax Act primarily uses the WDV method.

Straight-Line Method (SLM). The same amount is depreciated every year — original cost (less any residual value) divided evenly across the useful life. It is simpler and produces a steady annual charge. The Companies Act permits both SLM and WDV, with companies choosing based on useful life.

Feature	Written-Down Value (WDV)	Straight-Line (SLM)
Basis	Percentage of remaining value	Equal share of (cost − residual)
Annual amount	Highest early, tapering	Same every year
Front-loads expense?	Yes	No
Primary use in India	Income Tax Act	Permitted under Companies Act

The two regimes: Income Tax Act vs Companies Act

This is where Indian businesses often get confused, so let us separate them clearly.

Income Tax Act depreciation determines your taxable income. It uses:

• Prescribed rates for categories of assets (you do not choose the rate).
• The WDV method.
• The block-of-assets concept (explained next).

Every business that claims depreciation as a tax deduction — proprietorship, partnership, LLP, or company — computes it this way for its tax return.

Companies Act depreciation applies to companies preparing financial statements and is based on each asset's useful life, with SLM or WDV allowed. It governs the depreciation shown in a company's books and audited accounts.

The consequence: a company maintains two depreciation figures — book depreciation under the Companies Act for its financial statements, and tax depreciation under the Income Tax Act for its return. These usually differ, and the difference is reconciled when computing taxable income. A proprietorship or partnership, which is not a company, generally only needs the Income Tax Act method — one set of figures, not two. The structural differences between these forms are covered in Private Limited vs LLP vs Proprietorship.

The block-of-assets concept

Under the Income Tax Act, you do not depreciate each asset individually. Instead, assets sharing the same depreciation rate are pooled into a "block." For example, all plant and machinery at a given rate form one block; all furniture at its rate forms another.

Depreciation is charged on the written-down value of the whole block, and the block flows year to year:

• Buy an asset → its cost is added to the relevant block.
• Sell an asset → the sale value is subtracted from the block.
• As long as the block has a positive balance and at least one asset, you keep depreciating the block — individual items are not tracked for gain or loss.

This pooling is a real simplification: you manage a handful of blocks rather than a long register of individual assets and their separate calculations.

A worked example in rupees

Take Verma Engineering, a partnership firm (so only Income Tax Act depreciation applies), buying a CNC machine.

• Cost of machine: Rs.5,00,000
• It falls in the plant-and-machinery block. Assume the prescribed WDV rate for this block is 15% (an illustrative rate — confirm the current rate for your asset type).

Year 1 (asset used more than 180 days):

• Opening block value: Rs.5,00,000
• Depreciation at 15%: Rs.75,000
• Closing WDV: Rs.5,00,000 − Rs.75,000 = Rs.4,25,000

Year 2:

• Opening WDV: Rs.4,25,000
• Depreciation at 15%: Rs.63,750
• Closing WDV: Rs.3,61,250

Year 3:

• Opening WDV: Rs.3,61,250
• Depreciation at 15%: Rs.54,188
• Closing WDV: Rs.3,07,062

Notice the pattern: the depreciation amount falls each year (Rs.75,000 → Rs.63,750 → Rs.54,188) because WDV charges a fixed percentage on a shrinking balance.

The tax effect. In Year 1, the Rs.75,000 depreciation reduces Verma Engineering's taxable profit by Rs.75,000 — yet no cash left the firm that year for it (the Rs.5,00,000 was paid at purchase). If the firm's effective tax rate is, say, 30%, that Rs.75,000 deduction saves roughly Rs.22,500 in tax in Year 1 alone, with further savings each subsequent year as the asset continues to depreciate. That is depreciation working as a non-cash shield.

A half-year nuance worth knowing: if an asset is put to use for less than 180 days in the year of purchase, only half the normal depreciation is allowed that year. So if Verma had bought the machine late in the year and used it under 180 days, Year 1 depreciation would be half of Rs.75,000 = Rs.37,500, with the full rate resuming the next year.

Why depreciation matters for cash and planning

Two practical takeaways for a small-business owner:

It lowers tax without lowering cash. When you budget your tax outgo or your advance tax instalments, remember depreciation reduces taxable profit. A capital-heavy business with significant machinery may have far lower taxable income than its cash profit suggests — a difference that matters for both tax planning and how you read your own performance.

Profit on the books is not cash in the bank. Because depreciation is non-cash, a business can show a modest profit yet have healthy cash, or vice versa. This gap between accounting profit and actual cash is exactly why cash-flow management is a separate discipline from profit — explored in Business Cash Flow. Keeping a clear view with a business cash flow plan stops the depreciation-driven gap from confusing your decisions, and a profit margin check reminds you which costs are cash and which are not.

Capital expense or repair? The boundary that trips people

A recurring judgement call: when you spend on an existing asset, is it a repair (immediate expense) or a capital improvement (capitalise and depreciate)?

• Repairs and maintenance restore an asset to working condition without materially enhancing it — servicing a machine, replacing a worn part, repainting. These are revenue expenses, deducted now.
• Capital improvements materially extend an asset's life or capacity — a major upgrade that makes the machine do more or last substantially longer. These are capitalised and depreciated.

Misclassifying a capital improvement as a repair overstates this year's expense and understates the asset; misclassifying a routine repair as capital understates this year's expense. The rough test: does the spend merely keep the asset running (repair), or does it materially upgrade or extend it (capital)? When the amount is large and the effect is lasting, lean towards capitalising.

What happens when you sell an asset

Selling a fixed asset has tax consequences that follow from the block-of-assets system, and they often surprise owners expecting a simple "profit or loss on sale."

Because individual assets within a block are not tracked separately, selling one normally just reduces the block's value by the sale proceeds, and you continue depreciating whatever remains. There is no individual gain or loss to compute as long as the block survives — the sale value is simply netted off the block before the year's depreciation is charged.

Two situations break this:

• The block ceases to exist — you sell the last asset in a block, or sell assets for more than the block's written-down value so the block balance turns negative. This can crystallise a short-term capital gain under the tax rules, computed on the block.
• The block value goes to zero with assets still in it — depreciation stops because there is nothing left to depreciate, even if the physical assets remain in use.

The practical lesson: do not assume selling old equipment produces a neat accounting profit or loss line. Under the Income Tax Act's block system, the effect is usually a quiet reduction of the block, with a capital-gains consequence only in the specific cases above. When you plan to dispose of significant assets, check how it affects the relevant block before assuming the tax outcome.

A simple year-end depreciation routine

For a small business, depreciation need not be a year-end mystery. A workable routine:

1. Maintain a fixed-asset register — a simple list of every asset, its purchase date, cost, and the block it belongs to. This is the single document that makes depreciation easy.
2. Note the in-use date for each new asset, so you can apply the 180-day rule correctly.
3. Group by block and confirm the current prescribed rate for each block from the income tax portal.
4. Net off any sales during the year against the relevant block.
5. Apply the WDV rate to each block's opening value (with the half-rate adjustment for under-180-day additions) to get the year's depreciation.
6. Carry the closing WDV forward as next year's opening value.

Done once a year against a clean register, this is a short exercise — and it is far easier than reconstructing asset history later. The register also feeds straight into the financials your lender or accountant will want; a business that knows its fixed assets cold looks organised exactly where it matters, which ties back to being loan-ready.

Common mistakes

• Expensing a fixed asset in full. Knocking the whole cost of a machine off this year's profit is wrong for tax; it must be capitalised and depreciated.
• Capitalising trivial items. Depreciating a Rs.1,500 item over years is pointless; small-value purchases are usually expensed (check the current threshold).
• Confusing repairs with capital improvements. Routine repairs are immediate expenses; material upgrades are capitalised.
• Using the wrong rate or method. The Income Tax Act prescribes rates and WDV; you do not get to choose freely as you might imagine.
• Forgetting the 180-day rule. Assets used under 180 days in the purchase year get only half the depreciation that year.
• Ignoring the block concept. Trying to track gain/loss on each individual asset, when the block method pools them, creates needless work and errors.
• Treating depreciation as cash. It is a non-cash expense — budgeting as if cash leaves each year misreads your liquidity.
• Mixing up the two regimes. Companies need both book (Companies Act) and tax (Income Tax Act) depreciation; conflating them distorts both the accounts and the return.

What to do next: a checklist

• List your fixed assets — machinery, computers, furniture, vehicles — separately from routine expenses.
• Confirm which regime applies: Income Tax Act only (proprietorship/partnership) or both (company).
• Group assets into blocks by their prescribed depreciation rate.
• Look up the current rates for your asset categories on the income tax portal — do not assume.
• Apply the WDV method for tax, charging the rate on each block's written-down value.
• Remember the 180-day rule for assets bought partway through the year.
• When spending on existing assets, decide repair (expense) vs improvement (capitalise) deliberately.
• Factor depreciation into your tax estimate and your advance tax planning.
• Keep accounting profit and cash flow separate in your mind, using a cash flow view.

Depreciation rewards a little upfront understanding. Once you can tell a fixed asset from an expense, know which regime applies, and apply the right method on the right block, it becomes a routine year-end calculation — one that quietly and legitimately lowers your tax bill without touching your cash.

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Disclaimer: This article is for educational purposes only and is not legal, tax, or financial advice. Compliance rules change — verify on official portals (gst.gov.in, incometax.gov.in, mca.gov.in) or with a qualified professional.