Introduction
A machine, a vehicle or furniture helps a business earn revenue for several years, and its value falls as it is used. Depreciation spreads the cost of such fixed assets over their useful life, so each year's profit carries a fair share. Section II of the chapter adds provisions (charges for known expenses/losses of uncertain amount) and reserves (appropriations of profit).
Key Concepts — Section I: Depreciation
7.1 Meaning
Depreciation is a permanent, continuing and gradual shrinkage in the book value of fixed assets. It is based on the cost of the asset consumed, not its market value. AS-6 (ICAI) defines it as "a measure of the wearing out, consumption or other loss of value of depreciable asset arising from use, effluxion of time or obsolescence through technology and market-change."
Related terms: Depletion — for wasting assets like mines and quarries. Amortisation — writing off intangible assets such as patents and copyrights.
7.3 Causes
Wear and tear due to use or passage of timeExpiration of legal rights (e.g. leases, patents)ObsolescenceAbnormal factors (accidents, fire, flood)7.4 Need for depreciation
Matching costs with revenue; tax (it is deductible); a true and fair financial position; compliance with law.
7.5 Factors affecting the amount
Cost — invoice price plus freight, transit insurance, installation, registration, commission and initial repairs on second-hand assets. Example: machine ₹50,000 + transport and installation ₹5,000 = cost ₹55,000.Net residual (scrap) value — expected sale value less disposal costs. Example: sale value ₹6,000 − disposal costs ₹1,000 = ₹5,000.Depreciable cost = cost − net residual value (₹50,000 − ₹5,000 = ₹45,000 in the book's example).Estimated useful life — economic life, usually shorter than physical life.7.6 Methods
Straight Line Method (SLM) — equal charge every year (fixed instalment method).
Depreciation = (Cost − Estimated net residual value) ÷ Estimated useful life
Rate = Annual depreciation ÷ Acquisition cost × 100
Written Down Value Method (WDV) — a fixed percentage on the opening book value, so the charge falls each year (reducing balance method).
Rate R = [1 − (s/c)^(1/n)] × 100, where s = scrap value, c = cost, n = useful life
7.7 SLM vs WDV
Basis: original cost (SLM) vs book value (WDV).Annual charge: constant (SLM) vs declining (WDV).Depreciation + repairs together: rises in later years (SLM) vs roughly equal (WDV).Income Tax: SLM not recognised; WDV recognised.Suitability: SLM for land and buildings, patents, trademarks; WDV for plant, machinery and vehicles.7.8 Recording depreciation
Charging depreciation to the asset account — Depreciation A/c Dr, To Asset A/c; then P&L A/c Dr, To Depreciation A/c. The asset appears at book value.Provision for depreciation (accumulated depreciation) account — Depreciation A/c Dr, To Provision for Depreciation A/c; then P&L A/c Dr, To Depreciation A/c. The asset stays at original cost; the accumulated provision is deducted from it or shown on the liabilities side.7.9 Disposal
On sale, the provision is first transferred to the asset account (Provision for Depreciation A/c Dr, To Asset A/c); the sale proceeds are credited, and the balance is profit or loss. An Asset Disposal Account collects cost, accumulated depreciation, sale proceeds and profit/loss in one place.
7.10 Additions and extensions
Additions that become an integral part of the asset are capitalised and depreciated over its useful life. Routine maintenance is revenue expenditure.
Key Concepts — Section II: Provisions and Reserves
7.11 Provisions
A charge against profit for a known expense or loss of uncertain amount — e.g. provision for depreciation, bad and doubtful debts, taxation, discount on debtors, and repairs and renewals. Created by debiting P&L (prudence/conservatism). Shown as a deduction from the asset or with current liabilities.
7.12 Reserves
An appropriation of profit to strengthen the business — e.g. general reserve, workmen compensation fund, investment fluctuation fund, capital reserve, dividend equalisation reserve, debenture redemption reserve. Shown under Reserves and Surplus after capital.
Provision vs Reserve: charge against profit vs appropriation of profit; for a known liability vs to strengthen the business; reduces taxable profit vs no effect on taxable profit.
Types: General reserve (free); specific reserves; revenue reserves (from operating profits); capital reserves (from capital profits such as premium on issue of shares, profit on sale of fixed assets, profit prior to incorporation — not available for dividend).
7.13 Secret Reserve
A reserve that does not appear in the balance sheet, created by excess depreciation, undervaluing stock, charging capital expenditure to P&L, excessive provisions, or showing contingent liabilities as actual.
Worked Examples (figures verified)
SLM: cost ₹2,50,000, residual ₹50,000, life 10 years
Annual depreciation = (2,50,000 − 50,000) ÷ 10 = ₹20,000Rate = 20,000 ÷ 2,50,000 × 100 = 8%WDV @10% on ₹2,00,000:
Year 1: 20,000 → WDV 1,80,000Year 2: 18,000 → WDV 1,62,000Year 3: 16,200 → WDV 1,45,800WDV rate formula (truck): cost ₹9,00,000, scrap ₹50,000, life 16 years
(50,000/9,00,000)^(1/16) ≈ 0.835, so R ≈ 16.5%. The book rounds this to 0.834 and 16.6%.Singhania & Bros (SLM): plant ₹5,00,000 + installation ₹50,000 = ₹5,50,000; salvage ₹10,000; life 10 years
Depreciation = (5,50,000 − 10,000) ÷ 10 = ₹54,000 p.a.Dalmia Textile Mills (WDV @10%): machinery ₹2,00,000 + installation ₹10,000 = ₹2,10,000
2016-17: 21,000 → 1,89,0002017-18: 18,900 → 1,70,1002018-19: 17,010 → 1,53,090Sahani Enterprises (WDV @20%, part-year): machine ₹40,000 + ₹5,000 installed on 1 July 2014
9 months to 31.3.2015: 6,750 → 38,250New machine ₹35,000 on 1 Jan 2016; 2015-16 depreciation = 7,650 + 1,750 (3 months) = 9,400 → WDV 63,8502016-17: 12,770 → 51,080R.S. Limited (disposal): vehicle ₹4,00,000, salvage ₹40,000, 4 years
Depreciation = ₹90,000 p.a. SLMSold for ₹50,000 against book value ₹40,000 → profit ₹10,000Digital Studio (addition): machine ₹8,00,000, 20% SLM
Modification ₹80,000 on 1.4.2015Depreciation 2015-16 = 1,60,000 + 16,000 = ₹1,76,000Key-Facts Sheet
Depreciable cost = cost − net residual value.SLM: fixed amount; WDV: fixed rate on a falling balance.Income-tax law recognises WDV, not SLM.Provision = charge against profit; Reserve = appropriation of profit.Capital profits → capital reserve (not for dividend).Exam Focus
Compute SLM and WDV depreciation, including part-year assets; prepare asset, provision-for-depreciation and disposal accounts.Differentiate SLM vs WDV, provision vs reserve, and revenue vs capital reserve.Explain causes and need of depreciation and the meaning of secret reserve.Key Terms
Depreciation (मूल्य ह्रास)Depletion (अवक्षय)Amortisation (परिशोधन)Obsolescence (अप्रचलन)Residual/scrap value (अवशिष्ट मूल्य)Useful life (उपयोगी जीवन)Straight line method (सीधी रेखा विधि)Written down value method (क्रमागत ह्रास विधि)Provision (प्रावधान)Reserve (संचय)General reserve (सामान्य संचय)Capital reserve (पूंजी संचय)Secret reserve (गुप्त संचय)Asset disposal account (परिसंपत्ति निपटान खाता)Common Mistakes
Leaving installation and freight out of cost.Charging a full year's depreciation on an asset bought mid-year (use months).Applying the WDV rate to original cost instead of the opening book value.Calling a reserve a charge against profit.