What it means
Think of amortisation as matching a cost to the period that benefits from it. If a company pays $120,000 for a patent that will be useful for ten years, it would be misleading to charge the whole amount to a single year's profit.
Instead the cost is spread, so each year carries its fair share. In the accounts, amortisation of an intangible asset appears as an expense on the income statement, and the asset's carrying value on the balance sheet falls by the same amount each period.
It is a non-cash charge, because the cash left the business when the asset was bought, not when the expense is recorded. That is why analysts add it back when they calculate EBITDA (earnings before interest, tax, depreciation and amortisation).
The second meaning relates to borrowing. A fully amortising loan has a fixed repayment schedule in which every payment covers the interest owed for the period and also reduces the principal (the amount originally borrowed).
Early payments are mostly interest and later ones are mostly principal, which is why the balance falls slowly at first. Amortisation is closely related to depreciation, and the difference is simply the type of asset.
Depreciation applies to tangible assets such as machinery and vehicles, while amortisation applies to intangibles such as licences, trademarks and capitalised software. Many companies combine the two in a single line, often labelled D&A.
The most common method is straight-line, which charges an equal amount each year, but other patterns are allowed if they better reflect how the benefit is consumed. Goodwill is treated differently from other intangibles under some accounting frameworks, so the rules depend on which framework the company reports under.
Auditors and analysts watch amortisation for signs of aggressive judgement. If a company stretches the useful life of an intangible asset, the yearly charge shrinks and reported profit looks better without any change in real performance.
Reviewing the assumptions in the notes to the accounts is a quick way to test how cautious management has been.
In practice
Real-world examples
Example 1
A pharmaceutical start-up buys the rights to a drug formulation for $500,000 and expects to benefit from it for 5 years. It records $100,000 of amortisation expense every year, so the cost is matched against the revenue the formulation helps to earn.
Example 2
A family-owned furniture manufacturer takes out a $300,000 equipment loan repaid in 60 equal monthly instalments. The lender provides a schedule showing how each payment is split between interest and principal. The finance manager uses it to post the correct interest expense each month.
Example 3
A marketing agency capitalises $60,000 of costs to build its own client booking platform and expects it to be useful for 3 years. It charges $20,000 of amortisation a year, which lowers reported profit but has no effect on cash in those years. The accounting team reviews the 3-year life at each year end in case the platform becomes obsolete sooner.
Think of it
Amortization is like slicing a cake into equal pieces to share over time-whether it's the value of an asset or the repayment of a loan.
Formula
Calculation
Annual amortisation expense = (Cost of intangible asset - Residual value) / Useful life in years
Loan interest for a period = Opening loan balance x (Annual interest rate / Number of periods per year)
Suppose a software company buys a patent for $120,000. It expects the patent to have no value after 10 years, so the residual value is $0. Annual amortisation = (120,000 - 0) / 10 = $12,000 per year, or $1,000 per month. After three years the accumulated amortisation is 12,000 x 3 = $36,000, so the patent's carrying value is 120,000 - 36,000 = $84,000.
For the loan meaning, suppose the same company borrows $200,000 at 6% a year over 10 years with monthly payments. The first month's interest is 200,000 x (0.06 / 12) = $1,000. If the monthly payment is $2,220, then $1,220 of it reduces the principal, leaving a balance of $198,780.Case study
Seen in the real world
Harbourline Analytics is an illustrative, fictional data company that acquired a smaller rival for $2,000,000. Of that price, $800,000 was assigned to customer relationships that the finance team estimated would last 8 years.
The first year's accounts showed $100,000 of amortisation on those relationships. A new sales director saw operating profit fall compared with the prior year and assumed performance had weakened. The financial controller explained that cash earnings were unchanged, and that the drop came from a non-cash charge that would continue for the full 8 years.
After that conversation, the board began reviewing profit both before and after amortisation. This illustrative story shows why leaders who read only the bottom line can misjudge a business that has recently made an acquisition. The board also asked the controller to review the 8-year life each year, so that the charge could be shortened if customers left faster than expected.
Watch out
Common mistakes
- Treating amortisation as a cash payment, when for an intangible asset it is a non-cash accounting entry and the cash was spent earlier.
- Using amortisation and depreciation as if they were interchangeable, when depreciation applies to physical assets and amortisation to intangibles.
- Assuming every loan repayment reduces the debt by the same amount, when in an amortising loan the early payments are mostly interest.
Questions
People also ask
Is amortisation tax deductible?
In many jurisdictions it is, but the rules and the allowed period often differ from the accounting treatment, so the tax authority's guidance should be checked.
What is the difference between amortisation and depreciation?
Depreciation spreads the cost of tangible assets such as vehicles and machinery, while amortisation spreads the cost of intangible assets such as patents and software.
Why is amortisation added back in EBITDA?
Because it is a non-cash charge, adding it back gives a clearer view of the cash-generating ability of the core operations.
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