Net Book Value Calculator

Calculator

Asset name

Currency symbol

Depreciation method

Purchase price

Acquisition costs

Capital improvements

Residual or salvage value

Useful life in years

Asset age in years

Declining balance rate %

Total expected units

Units already used

Known accumulated depreciation

Impairment loss

Revaluation adjustment

Expected selling price

Disposal cost

Notes

Example Data Table

Asset	Cost	Residual	Accumulated depreciation	Impairment	Net book value
Delivery Van	$56,000	$8,000	$24,000	$0	$32,000
Office Printer	$7,200	$600	$4,400	$300	$2,500
Workshop Tool	$18,500	$1,500	$9,350	$0	$9,150
Server System	$32,000	$2,000	$20,000	$1,250	$10,750

Formula Used

Gross asset cost = Purchase price + Acquisition costs + Capital improvements.

Depreciable base = Gross asset cost - Residual value.

Net book value = Gross asset cost - Accumulated depreciation - Impairment loss + Revaluation adjustment.

Net disposal proceeds = Selling price - Disposal cost.

Gain or loss = Net disposal proceeds - Net book value.

For straight line depreciation, accumulated depreciation equals depreciable base multiplied by asset age divided by useful life.

For units of production, accumulated depreciation equals depreciable base multiplied by used units divided by total expected units.

How to Use This Calculator

Enter the asset name and preferred currency symbol.
Add purchase price, acquisition costs, and capital improvements.
Enter residual value, useful life, and current asset age.
Select the depreciation method that matches your records.
Add units, rate, or known depreciation when needed.
Enter impairment, revaluation, sale price, and disposal cost.
Press the calculate button to view the result above the form.
Download the result as CSV or PDF for records.

Understanding Net Book Value

Net book value shows the carrying value of an asset after depreciation and other valuation changes. It is not always the sale price. It is an accounting measure. It helps teams review equipment, vehicles, tools, software, and property records. A good estimate supports audits, insurance reviews, tax planning, and replacement decisions.

Why Net Book Value Matters

Businesses buy assets to use over many periods. The original cost stays in records, but the asset loses value through use, age, and wear. Depreciation spreads that cost across useful life. Net book value combines the original cost and accumulated depreciation. It shows the remaining value still recorded on the balance sheet.

This number is useful before selling an asset. It helps you compare the expected selling price with the carrying amount. If the sale proceeds are higher, the business may record a gain. If proceeds are lower, it may record a loss. The calculator also includes disposal cost, so the result is more practical.

Accounting Uses

Net book value is common in fixed asset registers. Accountants use it for closing entries, impairment reviews, and management reports. Managers use it when they decide whether to repair, replace, or sell an asset. Lenders may review it when assets support a loan. Insurers may ask for it when reviewing business property.

Depreciation Choices

Different assets need different methods. Straight line depreciation spreads cost evenly. Declining balance methods charge more cost in early years. Sum of years digits also accelerates depreciation. Units of production links expense to actual use. A known accumulated depreciation option is helpful when your accounting system already provides a figure.

Practical Interpretation

A low net book value does not mean an asset is useless. It may still work well. It only means most of its recorded cost has been depreciated or reduced. A high value also needs care. It may require impairment if the asset cannot recover that amount through use or sale.

Use this calculator as an estimate. Confirm final entries with your accounting policy. Local reporting rules may change how depreciation, impairment, and revaluation are recorded.

When data is uncertain, enter conservative values and keep notes for every assumption. Clear notes reduce confusion during later audit reviews.

FAQs

What is net book value?

Net book value is the recorded value of an asset after subtracting accumulated depreciation and impairment. Revaluation adjustments may also change it. It is used in accounting records and asset reports.

Is net book value the same as market value?

No. Market value is what someone may pay for the asset. Net book value is based on accounting cost, depreciation, impairment, and revaluation entries.

Which depreciation method should I use?

Use the method followed by your accounting policy. Straight line is common for even use. Declining methods suit assets losing value faster early. Units of production suits usage-based assets.

Can net book value be zero?

Yes. An asset can reach zero after depreciation or impairment. The calculator floors negative carrying value at zero, because assets are normally not reported as negative values.

What is residual value?

Residual value is the estimated value left at the end of useful life. It is subtracted from cost when calculating the depreciable base.

How is gain or loss on disposal found?

First subtract disposal cost from the selling price. Then subtract net book value from that net disposal amount. A positive result is a gain. A negative result is a loss.

Should acquisition costs be included?

Yes, when they are capitalized under your accounting policy. Freight, installation, testing, and setup costs may become part of the asset cost.

Can I use known accumulated depreciation?

Yes. Select the known accumulated depreciation method. Then enter the figure from your asset register or accounting system. The calculator will use that amount directly.