Accumulated depreciation: what it is and how to calculate

Published Monday 20 April 2026

Table of contents

• How accumulated depreciation works
• Is accumulated depreciation an asset or a liability?
• Depreciation vs accumulated depreciation
• How does accumulated depreciation affect financial statements?
• How to calculate accumulated depreciation
• Alternative depreciation methods
• Why understanding accumulated depreciation matters for a business
• Simplify your accounting with Xero
• FAQs on accumulated depreciation

Key takeaways

• Subtract accumulated depreciation from an asset's original cost to calculate its book value, which shows what the asset is currently worth to your business.
• Use the straight-line method to spread depreciation evenly over an asset's useful life, or choose the declining balance or units of production method if your asset loses value faster in early years or based on usage.
• Recognise that depreciation is a non-cash expense, so it gets added back to net income on the cash flow statement and does not reduce the cash available in your business.
• Track accumulated depreciation accurately to reduce your tax bill through capital allowances, plan asset replacements on time, and strengthen your chances of securing business financing.

How accumulated depreciation works

Accumulated depreciation is the total amount of depreciation expense recorded against an asset since you bought it. It tracks how much value your asset has lost over time due to wear, tear, and obsolescence.

You record accumulated depreciation in a contra asset account. Unlike regular asset accounts that have a debit balance, this account carries a credit balance.

On your balance sheet, accumulated depreciation sits directly beneath the related fixed asset. This lets you see the original cost and total depreciation side-by-side.

Subtract accumulated depreciation from the asset's original cost to get its book value. This figure shows what the asset is worth to your business today.

Is accumulated depreciation an asset or a liability?

Accumulated depreciation is a contra asset account, not an asset or liability. It appears on the balance sheet but works differently from both.

Here's why it isn't classified as a liability:

• No debt obligation: you don't owe money to anyone
• No repayment requirement: it simply reduces asset value over time
• No cash outflow: it measures wear, tear, and obsolescence without affecting cash

A contra asset reduces the value of assets on your balance sheet. It carries a credit balance, showing how much an asset's worth has decreased from its original cost.

Depreciation vs accumulated depreciation

Depreciation and accumulated depreciation are related but different concepts.

• Depreciation: the annual expense showing how much an asset's value decreases in a single year
• Accumulated depreciation: the running total of all depreciation expenses recorded for that asset since purchase

Each year, you add the current year's depreciation expense to the accumulated total. Over time, accumulated depreciation grows until the asset reaches the end of its useful life.

Here's more information about depreciation

How does accumulated depreciation affect financial statements?

Accumulated depreciation appears on three key financial statements, each showing a different aspect of how asset values affect your business finances.

Accumulated depreciation on the balance sheet

Accumulated depreciation reduces your asset's book value on the balance sheet. Your balance sheet displays the original purchase price, then subtracts accumulated depreciation to show the asset's current worth.

Accumulated depreciation on the income statement

While depreciation expense reduces your accounting profit, it is actually not allowed as a deduction in computing taxable profits; instead, capital allowances may be given to lower your tax bill. This non-cash expense gives you the tax benefit without any money leaving your business.

In the UK, businesses can often claim a 100% allowance on qualifying plant and machinery (a type of capital expenditure) up to a £1 million threshold through the Annual Investment Allowance (AIA).

Accumulated depreciation on the cash flow statement

Depreciation gets added back to net income on the cash flow statement because no actual cash leaves your business. This adjustment shows the difference between accounting profits and actual cash available.

Example: balance sheet for accumulated depreciation

Here's a simple example of how accumulated depreciation appears on a balance sheet for a delivery van:

• Cost of van: £20,000
• Accumulated depreciation after three years: £9,000
• Net book value: £11,000

On your balance sheet, you show the cost of the van and subtract the accumulated depreciation to arrive at the net book value.

How to calculate accumulated depreciation

Calculate accumulated depreciation to track your asset's current value for financial reporting and tax purposes. The result shows how much total depreciation you've recorded since purchasing the asset.

The straight-line method is the simplest approach and most popular with small businesses because it spreads the cost evenly over the asset's useful life. However, if that useful economic life is estimated to be longer than fifty years, accounting standards require annual impairment reviews to ensure the asset's carrying amount is not overstated.

The straight-line depreciation method

The straight-line formula spreads an asset's cost evenly over its useful life:

Annual depreciation expense = (Asset cost − Salvage value) ÷ Useful life

Definitions of each term

Here's what each term in the formula means:

• Asset cost: original purchase price including delivery and setup costs
• Salvage value: expected resale or scrap value when the asset reaches end of life
• Useful life: number of years you expect to use the asset before replacement

Under certain accounting standards like IAS 23, businesses may also need to capitalise interest for the period of construction as part of the asset's total cost. Learn more about measuring depreciation.

Useful life is an estimate. You may need to reassess it during the asset's lifetime, which would change the annual depreciation expense for future years. See ACCA's guidance on measuring depreciation for more details.

Each variable affects your annual depreciation expense differently:

• Shorter useful life: spreads depreciation over fewer years, resulting in higher annual expense
• Higher salvage value: reduces the depreciable amount, resulting in lower annual expense
• Higher asset cost: increases the depreciable amount, resulting in higher annual expense

Here's how to calculate accumulated depreciation using the straight-line method. In this example, the asset costs £1,000, has a useful life of five years, and a salvage value of £100.

1. Calculate the annual depreciation expense

Using the formula: (Asset cost − Salvage value) ÷ Useful life

(£1,000 – £100) ÷ 5 = £180 per year

1. Track accumulated depreciation each year

Create a depreciation schedule showing how accumulated depreciation grows:

• Year 1: £180
• Year 2: £360
• Year 3: £540
• Year 4: £720
• Year 5: £900

1. Calculate the asset's book value

Use the formula: Book value = Initial cost – Accumulated depreciation

After 3 years: £1,000 – £540 = £460 book value

Alternative depreciation methods

Alternative depreciation methods may suit your business better depending on how your assets lose value. While the straight-line method is popular for its simplicity, some assets depreciate faster in early years or based on usage.

For complex assets, you can also depreciate components separately. Learn more about depreciation methods. For example, you might depreciate a furnace's lining over five years while depreciating the main body over ten years.

Declining balance method

The declining balance method applies higher depreciation in early years and lower depreciation in later years. This front-loads the expense to match how some assets actually lose value.

Use this method for assets like vehicles or tech equipment that lose value more quickly at the start of their useful life.

Units of production method

The units of production method bases depreciation on usage rather than time. You calculate depreciation based on the number of units produced or hours operated.

This method is ideal for manufacturing equipment or machinery where wear and tear relates directly to how much you use the asset. It provides more accurate depreciation when usage varies significantly from year to year.

Choose your depreciation method based on how the asset loses value and your business needs. If you later switch methods, such as moving from a reducing balance to a straight line, you must account for this prospectively as a change in accounting estimate. Talk with your accountant to decide which approach gives the most accurate picture of your asset values.

Why understanding accumulated depreciation matters for a business

When you understand accumulated depreciation, it helps your small business in three key ways:

• Reduce your tax bill: Depreciation lowers your taxable income, keeping more cash in your business
• Plan asset replacements: Track values over time to schedule upgrades and maintenance effectively
• Strengthen loan applications: Accurate depreciation records improve your chances of getting financing

Simplify your accounting with Xero

As your business grows, depreciation becomes more complicated to track. Xero streamlines these tasks so you spend less time on admin and more time running your business.

With Xero, you can create detailed depreciation schedules for a clear view of your fixed asset values. This means more accurate financial reporting and a clearer view of what your assets are worth.

Get one month free to get started.

FAQs on accumulated depreciation

These questions cover the practical details of recording and managing accumulated depreciation.

What is the journal entry for accumulated depreciation?

The journal entry debits depreciation expense and credits accumulated depreciation. This records the expense on your income statement while increasing the contra asset on your balance sheet.

Most accounting software, including Xero, automates this entry when you set up your fixed assets.