Key takeaways
– Written‑down value (WDV), also called book value or net book value, is an asset’s carrying amount after accumulated depreciation or amortization has been deducted from its historical cost.
– WDV appears on the balance sheet and helps track remaining economic value for financial reporting, sale/disposal decisions, and certain tax calculations.
– Calculating WDV requires: the asset’s cost, the chosen depreciation/amortization method, the useful life, any salvage value, and accumulated depreciation/amortization to date.
– Common methods: straight‑line, diminishing (declining) balance (often referred to as the written‑down value method), units‑of‑production, and effective interest for financial instruments.
– Practical steps: determine cost and useful life, select a method, compute periodic expense and accumulate it, update WDV each reporting period, test for impairment, and record disposal/gain or loss when sold.
Source: Investopedia (Eliana Rodgers) —
1. What is written‑down value (WDV)?
Written‑down value is the accounting carrying amount of an asset after deducting cumulative depreciation (for tangible assets) or amortization (for intangible assets) from its original cost. It represents the portion of the asset’s cost that has not yet been expensed and is reported on the balance sheet.
WDV = Historical cost of asset − Accumulated depreciation or accumulated amortization
2. Why WDV matters
– Financial reporting: WDV is part of total assets used to assess a company’s financial position.
– Decision making: WDV helps managers and accountants know how much of an asset’s cost remains to be expensed and whether to repair, replace, or dispose of the asset.
– Sale/disposal: WDV is used to determine accounting gain or loss on disposal (Sale proceeds − WDV).
– Taxes: Tax basis can differ from book WDV, creating deferred tax effects and potential recapture rules.
– Impairment: If fair value declines below WDV and is not recoverable, an impairment loss may be required.
3. Common depreciation and amortization methods
Choose the method that best reflects how the asset’s economic benefits are consumed.
A. Depreciation (for tangible assets)
– Straight‑line: allocates an equal expense each period.
Annual depreciation = (Cost − Salvage value) / Useful life
– Diminishing (declining) balance / Written‑down value method: applies a constant percentage to the carrying amount each period, producing larger expense earlier.
WDV_t = Cost × (1 − r)^t, where r is the depreciation rate and t is number of periods
– Units‑of‑production: expense is based on actual usage (hours, units produced).
Depreciation per unit = (Cost − Salvage value) / Total estimated units
B. Amortization (for intangible assets and some financial instruments)
– Straight‑line amortization: common for patents, software with finite useful lives.
Annual amortization = Cost / Useful life (if no salvage)
– Effective interest method (for bonds/discounts): amortizes premium/discount to reflect an effective interest rate.
– Loan amortization schedules: separate interest and principal components each period; outstanding principal is effectively the WDV of the loan.
4. Step‑by‑step practical procedure to calculate and use WDV
Step 1 — Record the asset at cost
– Include purchase price, non‑refundable taxes, delivery and installation costs, and other directly attributable costs.
Journal entry:
Dr Asset (at cost)
Cr Cash / Accounts Payable
Step 2 — Determine useful life and salvage value
– Useful life: estimate of the period the asset will provide benefits.
– Salvage value: expected residual value at end of useful life (if any).
Step 3 — Select an appropriate depreciation/amortization method
– Match the pattern of consumption of economic benefits; consider industry practice, tax rules, and accounting standards (IFRS/GAAP).
Step 4 — Calculate periodic depreciation/amortization and update accumulated amounts
Examples
Example A — Straight‑line
– Cost = $50,000; Salvage = $5,000; Useful life = 5 years
Annual depreciation = (50,000 − 5,000) / 5 = $9,000
After 3 years: Accumulated depreciation = 3 × 9,000 = $27,000
WDV = 50,000 − 27,000 = $23,000
Journal entry each year:
Dr Depreciation expense $9,000
Cr Accumulated depreciation $9,000
Example B — Diminishing balance (WDV method)
– Cost = $50,000; Depreciation rate = 40% per year
Year 1 depreciation = 50,000 × 40% = $20,000 → WDV = $30,000
Year 2 depreciation = 30,000 × 40% = $12,000 → WDV = $18,000
Year 3 depreciation = 18,000 × 40% = $7,200 → WDV = $10,800
Step 5 — Report WDV on the balance sheet
– Present asset at cost and accumulated depreciation (contra‑asset), or present net book value directly. Example line items:
Property, plant & equipment
Cost: $50,000
Accumulated depreciation: $(27,000)
Net book value (WDV): $23,000
Step 6 — Test for impairment
– If recoverable/fair value is below WDV and not recoverable, recognize impairment loss and set new carrying amount.
Step 7 — Disposal and sale accounting
When an asset is sold or retired:
– Remove asset cost and accumulated depreciation from books.
– Recognize cash received and record gain or loss:
Gain/Loss = Sale proceeds − WDV (at disposal date)
Journal entry example for sale:
Dr Cash (sale proceeds)
Dr Accumulated depreciation (full accumulated amount)
Cr Asset (original cost)
Cr Gain on sale (if sale > WDV) or
Dr Loss on sale (if sale < WDV)
5. Amortization examples and notes
– Intangible asset (patent): Cost $120,000; useful life 10 years (no salvage) → Annual amortization = $12,000. WDV after 4 years = $120,000 − $48,000 = $72,000.
– Loans/bonds: Amortization schedules separate interest and principal. The outstanding principal is the WDV of the loan for the lender; for the borrower, the carrying amount of a loan payable is the present value of remaining payments (adjusted for amortized discount/premium).
6. Accounting and tax considerations
– Book (financial) basis vs. tax basis: Companies may use different methods for GAAP/IFRS reporting and tax reporting, producing temporary differences and deferred tax.
– Tax rules sometimes prescribe depreciation methods or rates (e.g., MACRS in the U.S.) that differ from financial reporting choices.
– Depreciation recapture: On sale, tax rules may require “recapture” of depreciation as ordinary income up to certain limits.
– Disclosure: Financial statements should disclose depreciation/amortization methods, useful lives, and accumulated amounts per asset class.
7. Common pitfalls and best practices
Pitfalls:
– Not revising useful life or salvage values when circumstances change.
– Forgetting impairment testing when market conditions decline.
– Confusing book WDV with fair market value when valuing an asset for sale or loan collateral.
– Ignoring differences between tax and book depreciation that create deferred tax balances.
Best practices:
– Document the rationale for chosen methods and estimates.
– Reassess useful life and residual value periodically.
– Keep detailed accumulated depreciation schedules by asset.
– Coordinate with tax advisors to understand tax implications of depreciation/amortization choices.
– Disclose accounting policies in financial statements.
8. Quick reference formulas
– WDV (net book value) = Cost − Accumulated depreciation/amortization
– Straight‑line annual expense = (Cost − Salvage) / Useful life
– Diminishing balance WDV after t periods = Cost × (1 − r)^t
– Units‑of‑production expense per period = (Cost − Salvage) × (Units used in period / Total estimated units)
9. Example walkthrough: From purchase to disposal
1. Company buys machine for $50,000 on Jan 1. Useful life 5 years, salvage $5,000; uses straight‑line.
2. Record asset at cost.
3. Each year record depreciation expense $9,000; accumulate in contra‑account.
4. After 3 years, WDV = $23,000.
5. Management decides to sell at $30,000. Record sale:
• Remove asset cost and accumulated depreciation.
• Recognize cash $30,000 and gain $7,000 (30,000 − 23,000).
6. Consider tax effects: taxable gain may differ due to tax depreciation; handle deferred tax accordingly.
10. Frequently asked questions (short)
Q: Is WDV the same as market value?
A: No. WDV is an accounting measure; market (fair) value is what someone will pay in an arm’s‑length transaction and can be higher or lower than WDV.
Q: When does an asset reach zero WDV?
A: When accumulated depreciation equals the cost (less salvage, if any), or when the asset is fully amortized. Some methods approach but don’t reach zero if salvage is zero and a rate method is used; accounting rules often require you not to depreciate below residual value.
Q: Can you change depreciation methods?
A: Changes are allowed but require justification, disclosure, and retrospective or prospective application depending on accounting standards and the reason for change (e.g., better reflection of consumption).
Further reading and standards
– Investopedia — Written‑Down Value (Eliana Rodgers):
– IFRS references: IAS 16 (Property, Plant and Equipment), IAS 36 (Impairment of Assets), IAS 38 (Intangible Assets)
– US GAAP references: ASC 360 (Property, Plant, and Equipment), ASC 350 (Intangibles—Goodwill and Other)
Editor’s note: The following topics are reserved for upcoming updates and will be expanded with detailed examples and datasets.