accelerated depreciation
Accelerated depreciation is a way of writing off an asset's cost faster in its early years, so a business pays less tax now and more later.
In plain English
Every generator owner in Nigeria knows the truth that a new generator loses its shine faster than it loses its actual power. The first year it works hard and looks worn out fast, even though it still runs fine for years after. Accountants noticed this pattern applies to almost every machine, vehicle, and piece of equipment a business owns, and they built a rule around it.
Normally, depreciation spreads an asset's cost evenly across its useful life. If a company buys a delivery van for ₦6,000,000 expected to last six years, straight line depreciation charges ₦1,000,000 a year, neat and predictable. Accelerated depreciation throws that evenness away on purpose. It charges more cost in the early years and less later, because that is closer to how assets actually lose value and usefulness.
Why would a business want that? Tax. A bigger depreciation charge in year one means lower taxable profit that year, which means a smaller tax bill right now. A logistics company in Lagos buying new trucks might use this method to free up cash early, when the trucks are newest and the company most wants room to breathe. The tax is not avoided, only delayed, since smaller depreciation charges later mean higher taxable profit in future years. It is a timing tool, not a magic eraser.
In the United Kingdom, this shows up through capital allowances, where HMRC lets businesses claim a large chunk of an asset's cost against tax in the year of purchase, especially under schemes meant to encourage investment in equipment. A manufacturer in Manchester buying new machinery might claim most of its value immediately rather than spreading it over ten years.
For a Nigerian sending money home to help a family business buy equipment, this matters because it changes how soon the business feels tax relief. Faster relief early can mean more cash to reinvest, hire staff, or simply survive a tight quarter.
A bakery buys an oven for ₦2,400,000 expected to last four years. Under straight line depreciation, it charges ₦600,000 a year evenly. Under an accelerated method, it might charge ₦1,000,000 in year one, ₦700,000 in year two, ₦500,000 in year three, and ₦200,000 in year four, giving bigger tax relief upfront while the oven is newest.
Questions people ask
Does accelerated depreciation reduce the total tax a business pays over time?
No, the total depreciation claimed over the asset's life stays the same either way. Accelerated depreciation only shifts more of that relief into the early years and less into later years, so the timing of tax savings changes, not the total amount.
Why would a business choose accelerated depreciation instead of straight line?
Mostly for cash flow. Paying less tax early, when a new asset is often financed by a loan or has just drained cash reserves, gives a business breathing room exactly when it needs it most.
Can any business use accelerated depreciation, or does it need approval?
It usually depends on tax rules in the country and the type of asset. In Nigeria and the United Kingdom, tax authorities set specific allowances and rates for different asset classes, so a business follows those rules rather than choosing freely.
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