What it means
When a business buys a long-term asset like machinery or computers, it loses value as it gets older and is used. Accountancy rules require businesses to spread this cost over the useful life of the asset.
The reducing balance method accelerates this cost into the early years. You apply a constant depreciation rate not to the original purchase price, but to the current net book value, which is the original cost minus all depreciation charged so far.
This matters for non-finance managers because it directly impacts your departmental profit and loss statement. Assets are typically most productive and need the most maintenance when they are new.
Matching higher depreciation expenses with higher initial productivity provides a realistic view of profitability. It also lowers your tax bill earlier by reducing taxable income when the asset is newer.
In practice, you choose a depreciation rate based on the expected lifespan of the asset and tax regulations. Once set, you apply that same percentage to the reduced balance every year.
The asset value will never quite reach zero on the balance sheet, which realistically reflects that older equipment usually retains some scrap or residual value.
In practice
Real-world examples.
Example
A delivery startup buys a van for 20,000 pounds. Using a 20 percent reducing balance rate, the first year depreciation is 4,000 pounds, leaving a book value of 16,000 pounds for the second year.
Example
A boutique hotel purchases kitchen equipment costing 10,000 pounds. With a 25 percent reducing balance rate, the first year write-off is 2,500 pounds, leaving a carrying value of 7,500 pounds.
Example
An architecture firm invests 5,000 pounds in high-end design workstations. Applying a 30 percent reducing balance rate, the year one depreciation is 1,500 pounds, leaving a value of 3,500 pounds.
Think of it
“Think of driving a new car off the forecourt. It loses a huge chunk of its value in the very first year, less in the second year, and smaller amounts still as it ages.
Formula
Calculation
Depreciation Expense = Current Book Value x Depreciation Rate. For example, if a machine costs 10,000 pounds and the reducing balance rate is 20 percent, Year 1 depreciation is 10,000 x 0.20 = 2,000 pounds. The new book value is 8,000 pounds. In Year 2, depreciation is 8,000 x 0.20 = 1,600 pounds.Case study
Seen in the real world.
BrightPrint, a medium-sized commercial printing company, recently invested 50,000 pounds in a state-of-the-art digital printing press. The operations manager needed to decide how to spread this cost on the financial statements. They chose the reducing balance method with an annual depreciation rate of 25 percent. In the first year, BrightPrint recorded a depreciation expense of 12,500 pounds, reducing the asset book value to 37,500 pounds. This higher initial expense helped shield some of the strong early printing revenues from corporation tax. In the second year, the depreciation charge was calculated on the new 37,500 pound balance, resulting in an expense of 9,375 pounds and a remaining book value of 28,125 pounds. By year three, the charge dropped further to 7,031 pounds. This declining expense profile matched the reality of the machine needing more frequent repairs and losing competitive edge over time, while smoothing out future net profit figures as maintenance costs naturally rose.
Watch out
Common mistakes.
- Applying the fixed percentage to the original cost every year instead of the diminishing net book value.
- Changing the depreciation rate randomly year on year without a valid accounting reason.
- Failing to account for the residual value when the asset is eventually sold or scrapped.
Questions
People also ask.
How does this differ from the straight-line method?
The straight-line method charges the exact same depreciation amount every year. The reducing balance method charges a higher amount in the early years and less in later years.
Can I change my depreciation method later?
Changing accounting methods usually requires formal justification and consistency checks, so it is best to consult your accountant before making changes.
Does this affect my bank balance?
No. Depreciation is a non-cash accounting entry. It reduces your profit on paper to reflect asset wear and tear, but it does not involve cash leaving your bank account.
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