Use this calculator to estimate annual straight-line depreciation for a business asset. Essential for financial planning, budgeting, building accurate financial statements, and understanding the non-cash expense impact of capital investments.

What this calculator does

The depreciation calculator helps you estimate how much of an asset's value is expensed each year using the straight-line depreciation method.

It uses:

asset cost
salvage value
useful life in years

This gives you annual depreciation - the amount deducted from the asset's value each year over its useful life, representing the portion of the asset consumed in generating revenue during that period.

How to use the depreciation calculator

Enter your asset cost - the original purchase price of the asset including any costs directly attributable to bringing it into use, such as installation or delivery
Enter your salvage value - the estimated residual value of the asset at the end of its useful life. Enter 0 if the asset is expected to have no residual value.
Enter the useful life - the number of years over which the asset will be used in the business
The calculator instantly shows annual depreciation and total depreciable amount

Salvage value and useful life are estimates - always review these periodically and adjust if circumstances change significantly.

Straight-Line Depreciation Formula

Annual Depreciation = (Asset Cost - Salvage Value) / Useful Life

Where:

Asset Cost = original purchase price of the asset
Salvage Value = estimated residual value at the end of useful life
Useful Life = expected number of years the asset will be used
Annual Depreciation = yearly depreciation expense

Example calculation

If:

Asset cost = 100,000
Salvage value = 10,000
Useful life = 5 years

Then:

Depreciable amount = 100,000 - 10,000 = 90,000
Annual depreciation = 90,000 / 5
Annual depreciation = 18,000 per year

The business expenses 18,000 per year for 5 years, at which point the asset is carried at its salvage value of 10,000 on the balance sheet.

What is depreciation?

Depreciation is the accounting process of systematically allocating the cost of a tangible asset over its useful life. Rather than expensing the full cost of an asset in the year of purchase, depreciation spreads the expense across the periods in which the asset generates economic benefit.

Depreciation is a non-cash expense - it reduces reported profit without requiring a cash outflow in the period it is recognised. Understanding this distinction is essential for interpreting financial statements and calculating metrics like EBITDA, which adds depreciation back to operating profit to approximate cash earnings.

Straight-line depreciation vs other methods

Straight-line depreciation is the simplest and most widely used method. Other common methods include:

Straight-line - equal depreciation expense each year. Simple, predictable, and suitable for assets that provide consistent benefit over time.
Declining balance - higher depreciation in earlier years, declining over time. Better reflects assets that lose value faster early in their life, such as vehicles or technology equipment.
Units of production - depreciation based on actual usage rather than time. Suitable for assets where wear and tear is directly tied to output volume.

This calculator uses straight-line depreciation. For accounting and tax purposes, consult your accountant to determine the most appropriate method for each asset.

Common useful life guidelines by asset type

Useful life varies by asset type and accounting standards:

Computer equipment and software - typically 3 to 5 years
Vehicles - typically 4 to 8 years
Office furniture and fixtures - typically 7 to 10 years
Machinery and manufacturing equipment - typically 5 to 15 years
Buildings - typically 25 to 40 years
Leasehold improvements - typically the shorter of useful life or remaining lease term

Always verify useful life guidance with your accountant and against relevant accounting standards for your jurisdiction.

Why depreciation matters for financial planning

Understanding depreciation helps you:

include accurate non-cash expense in profit and loss reporting
plan asset replacement cycles based on remaining useful life and book value
calculate EBITDA correctly by adding depreciation back to operating profit
assess the true cost of capital investments over their operational lifetime
budget for future capital expenditure as assets approach the end of their useful life

Depreciation and EBITDA

EBITDA - earnings before interest, taxes, depreciation, and amortisation - adds depreciation back to operating profit to produce a cash earnings approximation. Understanding your annual depreciation charge is therefore essential for accurate EBITDA calculation.

Use the EBITDA Calculator to calculate EBITDA once you have your annual depreciation figure from this calculator.

When to use this calculator

Use this calculator when you want to:

estimate the annual depreciation charge for a new asset purchase
build a depreciation schedule for budgeting or financial forecasting
calculate the book value of an asset at a specific point in its useful life
review depreciation assumptions for existing assets
understand the impact of a capital investment on annual profit and loss

Common mistakes when calculating depreciation

Common mistakes include:

ignoring salvage value - treating the full purchase price as depreciable when the asset will have residual value at end of life
using an unrealistically long or short useful life - use realistic estimates based on actual expected usage and asset type
confusing accounting depreciation with tax depreciation - these often differ because tax rules prescribe specific rates and methods that may not match accounting estimates
treating depreciation as a cash cost - depreciation is a non-cash expense and should not be confused with the actual cash outflow at the time of purchase

Depreciation vs amortisation

These are closely related but apply to different asset types.

Depreciation applies to tangible assets - physical assets such as equipment, vehicles, machinery, and buildings
Amortisation applies to intangible assets - non-physical assets such as patents, trademarks, software licences, and goodwill

Both spread the cost of an asset over its useful life using similar methods. Both are added back in the EBITDA calculation. Use the EBITDA Calculator to calculate earnings before both depreciation and amortisation.

Depreciation vs cash flow

These measure business performance from very different perspectives.

Depreciation is a non-cash accounting expense that reduces reported profit without affecting cash
Cash flow reflects actual money in and out of the business - the purchase of an asset affects cash flow in the year of purchase, not through annual depreciation

The difference between profit and cash flow is often partly explained by depreciation. A business can be profitable on paper while having lower cash generation once capital expenditure is considered. Use the Cash Flow Calculator and Free Cash Flow Calculator for cash-based performance analysis.

Related calculations

Once you know your annual depreciation, you may also want to:

Use the EBITDA Calculator to calculate earnings before depreciation and amortisation
Use the Operating Profit Calculator to calculate profit from operations including depreciation
Use the Free Cash Flow Calculator to assess cash generation after capital expenditure
Use the Investment Return Calculator to evaluate the return on the asset investment

Useful resources

QuickBooks - accounting software with fixed asset management and automated depreciation scheduling
Xero - cloud accounting platform with fixed asset register and straight-line depreciation tools
Sage Fixed Assets - dedicated fixed asset and depreciation management software for businesses with significant asset portfolios

FAQs

What is straight-line depreciation?

Straight-line depreciation is a method that allocates an equal portion of an asset's depreciable cost to each year of its useful life. It is the simplest and most widely used depreciation method.

How do you calculate straight-line depreciation?

Annual Depreciation = (Asset Cost - Salvage Value) / Useful Life.

What is salvage value?

Salvage value - also called residual value - is the estimated value of an asset at the end of its useful life. If the asset will be worthless at disposal, salvage value is zero and the full cost is depreciated.

Is depreciation a cash expense?

No. Depreciation is a non-cash accounting expense. The cash outflow occurs when the asset is purchased. Depreciation then allocates that cost to the periods in which the asset is used.

What is the difference between depreciation and amortisation?

Depreciation applies to tangible physical assets such as equipment and vehicles. Amortisation applies to intangible assets such as patents, licences, and goodwill. Both methods spread asset cost over useful life in a similar way.

How does depreciation affect profit?

Depreciation is expensed in the profit and loss statement, reducing reported operating profit. A business with significant asset investment will show higher depreciation charges, which reduce profit without affecting cash flow.

What is the difference between accounting depreciation and tax depreciation?

Accounting depreciation is based on the estimated useful life and residual value of the asset as judged by management. Tax depreciation follows prescribed rates and methods set by tax authorities, which often differ from accounting estimates. Always consult a tax adviser for the tax treatment of specific assets.

When should I review depreciation assumptions?

Review depreciation assumptions annually and whenever there is a significant change in expected useful life, residual value, or the way the asset is used. If an asset becomes impaired - for example, due to obsolescence or damage - the remaining book value and depreciation schedule should be updated accordingly.

Interpreting your result

Your depreciation result should always be interpreted in context:

compare it against your historical baseline
review it alongside the main commercial or operational drivers behind the metric
compare it across products, channels, periods, or segments where relevant
avoid interpreting the result in isolation without checking the underlying input values

A single period can be noisy, so trend direction over several periods is usually more useful than one standalone result.

Data quality checklist

Before acting on this result, verify:

the inputs use the same time period and reporting basis
one-off anomalies are identified separately from steady-state performance
discounts, refunds, taxes, or fees are handled consistently where relevant
the underlying values are complete enough to support a meaningful conclusion

Small input inconsistencies can materially change the result.

How to improve this metric

Practical ways to improve this metric depend on the underlying business model, but often include:

identify the main driver behind the result before making changes
test one variable at a time so the impact is easier to measure
compare performance by segment rather than only at an overall level
review the metric regularly so changes can be caught early

Improvement is most reliable when measurement definitions remain stable over time.

Benchmarks and target setting

A good target depends on your industry, business model, and stage of growth.

When setting targets:

compare against your own historical trend before relying on outside benchmarks
define both minimum acceptable and aspirational target ranges
review targets whenever pricing, cost, demand, or channel mix changes materially
pair benchmark review with the underlying commercial context, not just the final number

Your own historical performance is usually the most practical benchmark.

Reporting cadence and decision workflow

For most teams, a simple cadence works best:

Weekly: monitor the metric when trading conditions or campaign activity change quickly
Monthly: compare the result against target and prior periods
Quarterly: reassess assumptions, targets, and the main drivers behind the metric

A practical workflow is to calculate the metric, identify the primary driver of change, test one improvement, and then review the next comparable period before scaling.

Common analysis scenarios

You can use this metric in several practical scenarios:

monthly performance reviews
pricing, margin, or cost analysis
planning and forecasting discussions
investor, lender, or management reporting

In each scenario, pair the result with the underlying business context so decisions are not made on one number alone.

FAQ extensions

Should I compare this metric across channels?

Yes, but only when definitions and attribution rules are consistent.

How many periods should I review before making changes?

At least 3 comparable periods is a good baseline unless there is a clear data issue or one-off event.

What should I do if this metric improves but profit declines?

Check whether costs, discounts, conversion quality, or downstream profitability changed at the same time.

How it works