Goodwill Accounting UK: Impairment and Tax Guide

Goodwill accounting UK rules matter most after an acquisition, when a premium paid for an established business must be reflected in the financial statements and tax computations. The accounting answer depends on the reporting framework, the acquisition facts and the evidence supporting future cash flows. This guide explains the practical position for CFOs, boards and finance teams.

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What is goodwill in business accounting?

Short answer: Goodwill is the future economic benefit arising from assets that cannot be individually identified and separately recognised. In a business acquisition, it is generally the residual amount after the consideration, identifiable assets, liabilities and relevant contingent liabilities have been measured. Internally generated goodwill is not recorded as an asset.

Goodwill can reflect factors such as an assembled workforce, expected synergies, customer relationships that do not meet separate recognition criteria, reputation and the ability to earn returns above the value of identifiable net assets. It is not a free-standing asset that can normally be sold on its own. It is recognised because it forms part of a purchased business combination.

Under HMRC's accounting guidance, purchased goodwill is calculated as the difference between the cost of acquiring the business and the aggregate fair value of the identifiable assets and liabilities acquired. The calculation is therefore only as reliable as the purchase price allocation behind it.

For example, if a company pays more than the fair value of the target's identifiable net assets, the excess may be goodwill. That does not mean the full excess should be accepted without challenge. The acquirer should first identify separately recognisable intangible assets, reassess provisions and contingent liabilities, and confirm that the transaction is a business acquisition rather than an acquisition of a group of assets.

How does goodwill arise in a UK business acquisition?

Short answer: Goodwill arises when an acquirer obtains control of a business and the consideration, including any relevant non-controlling interest and staged-acquisition amounts, exceeds the fair value of the identifiable net assets acquired. A defensible purchase price allocation separates identifiable intangibles before calculating the residual goodwill.

The acquisition accounting sequence should be documented in the transaction file:

1. Identify the acquirer and the date control is obtained.
2. Determine the consideration transferred, including deferred or contingent amounts where applicable.
3. Identify the assets acquired and liabilities assumed.
4. Measure identifiable assets, liabilities and qualifying contingent liabilities at the relevant acquisition-date values.
5. Recognise separately identifiable intangible assets where the applicable standard requires or permits it.
6. Calculate and recognise the residual goodwill or bargain purchase outcome.

This is why goodwill accounting should begin during due diligence, not at year end. The finance team needs the acquisition agreement, valuation work, working capital analysis, tax review and management forecasts to support both initial recognition and later impairment testing.

Goodwill analysis connects acquisition evidence with the acquired business's future performance.

A bargain purchase, sometimes called negative goodwill, requires care. The acquirer should reassess the measurements before recognising the result. The accounting treatment differs between reporting frameworks, so the finance team should not rely on a generic journal entry.

FRS 102 vs IFRS 3: how does goodwill accounting differ?

Short answer: The central practical difference is subsequent measurement. Under FRS 102, goodwill has a finite useful life and is amortised systematically, subject to impairment testing. Under IFRS 3, goodwill is not amortised after acquisition. Instead, it is allocated to cash-generating units and tested for impairment under IAS 36 at least annually and when indicators arise.

Issue

FRS 102

IFRS 3 with IAS 36

Initial recognition

Recognise purchased goodwill at the residual amount from the business combination calculation.

Recognise purchased goodwill at the acquisition-date excess specified by IFRS 3.

Subsequent measurement

Cost less accumulated amortisation and impairment losses.

Cost less accumulated impairment losses. Goodwill is not amortised.

Useful life

Finite and amortised systematically. If it cannot be estimated reliably, the life cannot exceed 10 years.

Goodwill is treated as having an indefinite life for this purpose and is not amortised.

Impairment review

Review when indicators suggest impairment under Section 27.

Test goodwill-containing cash-generating units annually and when impairment indicators arise.

Reversal of goodwill impairment

Not permitted.

Not permitted.

The Financial Reporting Council confirms that the Periodic Review 2024 amendments have a principal effective date of 1 January 2026. The amendments made no major change to Section 19, but a reporting entity should confirm which edition and transition provisions apply to its accounting period.

The ICAEW guidance on intangible assets and goodwill also confirms that goodwill under FRS 102 cannot have an indefinite useful life. The useful life should be estimated using the expected period of benefits, with a maximum of 10 years only where a reliable estimate cannot be made. That is not a default 10-year policy.

When and how is a goodwill impairment test performed?

Short answer: A goodwill impairment test compares the carrying amount of the relevant cash-generating unit with its recoverable amount. Recoverable amount is the higher of fair value less costs of disposal and value in use. If carrying amount exceeds recoverable amount, the loss is recognised, with goodwill written down first.

1. Look for impairment indicators

Under FRS 102, indicators can include a decline in market value, adverse changes in the economic or regulatory environment, higher market interest rates, net assets exceeding the entity's fair value, obsolescence, changes in how the business is used and financial performance below expectations. A post-acquisition loss of a major customer, missed synergy case, margin compression or a material forecast reduction may also require close analysis.

2. Allocate goodwill to the right cash-generating unit

Goodwill usually does not generate independently measurable cash flows. The test therefore considers the smallest cash-generating unit, or group of units, expected to benefit from the acquisition. Allocation should follow the way management monitors the acquired benefits, not simply the legal entity structure or the location of the goodwill on the balance sheet.

3. Calculate recoverable amount

Value in use is based on discounted future cash flows from the asset or cash-generating unit in its current condition. The model should reconcile to board-approved forecasts, use supportable growth and margin assumptions, and apply a discount rate consistent with the cash flow basis. Fair value less costs of disposal may provide a separate cross-check when reliable market evidence exists.

4. Allocate the loss and document judgement

If the carrying amount exceeds recoverable amount, the impairment loss is recognised immediately, subject to the applicable treatment for revalued assets. For a cash-generating unit, the loss is allocated to goodwill first and then to other assets within the unit on a pro-rata basis, subject to the standard's limits. Goodwill impairment is not reversed if forecasts later improve.

The HMRC summary of impairment principles describes the same core comparison and explains why a goodwill test is performed at the cash-generating-unit level. The calculation should be supported by a clear bridge from the carrying amount to the recoverable amount, sensitivity analysis and evidence of management review.

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Is goodwill amortisation tax deductible in the UK?

Short answer: Goodwill amortisation is not automatically deductible simply because it is charged in the accounts. UK Corporation Tax treatment falls within the corporate intangible assets regime and depends on the acquisition date, the parties, whether a business and qualifying intellectual property were acquired, and whether the relevant asset is included in the company's accounts.

For qualifying purchases made on or after 1 April 2019, HMRC states that relief may be available where:

• the goodwill and relevant assets are purchased with a business;
• the transaction includes qualifying intellectual property;
• the business is liable to Corporation Tax; and
• the relevant assets, including goodwill, are included in the company accounts.

Where the conditions are met, the fixed-rate relief is 6.5% a year on the lower of the relevant asset's cost or six times the cost of the qualifying intellectual property acquired with the business. The relief is claimed through the Company Tax Return and reduces taxable profit and Corporation Tax payable.

Important restrictions remain. Goodwill acquired without qualifying IP, without a business, or from a related individual, firm or partnership may not qualify. HMRC also identifies separate restrictions for relevant assets acquired between 3 December 2014 and 7 July 2015, and for acquisitions between 8 July 2015 and 31 March 2019. Goodwill connected with a business carried on by a company or related party before 1 April 2002 can also fall outside the regime until a qualifying unrelated-party acquisition occurs.

The tax computation may therefore diverge from the accounts. The accounting amortisation or impairment charge should be reconciled to the tax written-down value and the relevant Part 8 rules. A simple approach of deducting the full accounting charge can create an incorrect tax return, particularly where the acquisition history or related-party position is unclear.

What should a CFO review after an acquisition?

Short answer: A CFO should treat goodwill as a continuing reporting judgement, not a one-off purchase price calculation. The review should connect the acquisition agreement, purchase price allocation, reporting framework, forecast performance, impairment model, tax history and financial statement disclosures.

• Reporting framework: Confirm whether the group reports under FRS 102, adopted IFRS or another permitted framework.
• Acquisition perimeter: Establish whether the transaction acquired a business or only a collection of assets.
• Purchase price allocation: Check that identifiable intangible assets and liabilities were assessed before goodwill was calculated.
• Useful life: Under FRS 102, document the rationale for the goodwill amortisation period rather than defaulting to 10 years.
• CGU allocation: Reconcile the goodwill allocation to how management monitors the acquired benefits.
• Forecast integrity: Tie the impairment model to approved budgets, integration milestones, customer data and current market assumptions.
• Tax history: Preserve acquisition date, seller relationship, qualifying IP evidence and prior ownership information.
• Deferred tax and disclosures: Identify temporary differences and disclose material judgements, assumptions and sensitivity where required.
• Governance: Present the conclusions to the board, audit committee and external auditors with a clear evidence trail.

For groups operating across borders, the same acquisition may create different reporting and tax questions in more than one jurisdiction. A coordinated review reduces the risk that the accounts, tax return and management reporting use different versions of the transaction facts.

How can an M&A adviser support post-acquisition accounting?

Short answer: An M&A adviser can help management connect deal evidence with post-acquisition reporting. The work may include purchase price allocation support, accounting policy analysis, forecast and synergy review, impairment model challenge, tax coordination and board-ready documentation.

This support is particularly valuable where the transaction involves multiple entities, deferred consideration, earn-outs, international operations or a change in reporting framework. It can also help the CFO distinguish between an accounting impairment, a tax deduction and a commercial concern about the transaction's performance. These are related questions, but they are not interchangeable.

Aureliant Global supports mid-market and enterprise organisations through partner-led corporate finance, accounting and tax advisory services. Its model brings those disciplines together rather than treating deal execution and post-deal reporting as separate exercises. The firm is ICAEW-regulated, aligns its work with relevant quality standards, and offers a 48-hour partner response time for new enquiries.

Book a consultation with Aureliant Global about goodwill accounting, impairment testing or acquisition tax treatment

For a focused discussion, +44 20 7967 1177 is the firm's London number. Engagements are scoped around the facts, reporting framework and evidence required, with no assumption that a standard template will fit every acquisition.

Goodwill accounting UK: frequently asked questions

What is the journal entry for goodwill?

On acquisition, the acquirer generally recognises goodwill as an asset with a corresponding credit to the consideration or other acquisition-accounting entries, after identifiable assets and liabilities have been measured. The exact entries depend on the transaction structure, consolidated or separate accounts and applicable reporting framework.

Is goodwill amortised under FRS 102?

Yes. FRS 102 treats goodwill as having a finite useful life and requires systematic amortisation over that life. If management cannot estimate the useful life reliably, the life cannot exceed 10 years. The entity must also consider impairment indicators.

Is goodwill amortised under IFRS?

Goodwill recognised under IFRS 3 is not amortised. It is allocated to cash-generating units and tested for impairment under IAS 36 at least annually and when indicators of impairment arise.

Can a UK company claim tax relief for goodwill?

Sometimes. Relief is subject to the Corporation Tax corporate intangible assets rules. For qualifying post-1 April 2019 purchases, the transaction generally needs to include a business and qualifying IP, and the relevant assets must be included in the accounts. Related-party and historic goodwill restrictions can prevent relief.

Can goodwill impairment be reversed?

No. Goodwill impairment losses are not reversed under the FRS 102 principles described by HMRC or under IAS 36. A later improvement in performance may affect future forecasts, but it does not restore the written-down goodwill balance.

Sources and scope

This article is a general guide for UK businesses and does not replace advice on a specific acquisition. The accounting and tax outcome depends on the transaction documents, ownership history, reporting framework, accounting period and current legislation. The technical references used include the HMRC guidance on Corporation Tax relief for goodwill and relevant assets, HMRC's Corporate Intangibles Research and Development Manual, the IFRS Foundation summary of IAS 36, and FRC and ICAEW guidance on FRS 102.