Goodwill Calculator

What this calculator does

When one company buys another, it almost always pays more than the sum of the things it can list. This calculator measures that excess. Enter the purchase price, the fair value of the assets acquired, and the fair value of the liabilities taken on, and it returns the goodwill:

Goodwill = Purchase price − (Fair value of assets − Fair value of liabilities)

The bracketed part is the net identifiable assets, the stuff you could itemise and value one by one. Whatever the buyer paid on top of that becomes goodwill, and it goes on the balance sheet as an asset in its own right.

The part of the price you cannot point at

Why would anyone pay more than a business's assets are worth? Because the assets are not the business. A functioning company has things that are real and valuable but cannot sensibly be listed and priced on their own.

The staff, for one, who know how the work is done and are not owned by anybody. The customers who come back out of habit. The reputation that makes the phone ring. The supplier arrangements, the internal processes, the position in the market. And in an acquisition specifically, the synergies: the buyer may expect the two businesses together to be worth more than the two apart, and part of the price is that expectation.

None of those can be put on the acquired company's own balance sheet, because accounting will not let a business capitalise a reputation it built itself. But when someone buys the whole company and demonstrably pays for them, the excess has to go somewhere. Goodwill is that somewhere. It is the accounting system's way of recording that a price was paid for something real that cannot be pointed at.

That is also why goodwill only ever appears through acquisition. A company cannot create goodwill on its own books no matter how beloved its brand becomes. It arrives only when someone buys.

Three figures, and what "fair value" means here

1. Purchase price. The total consideration handed over, in cash, shares, or a combination.
2. Fair value of the assets. What the acquired assets are genuinely worth at the acquisition date.
3. Fair value of the liabilities. What the debts and obligations taken on are worth on the same date.

The words "fair value" are doing important work and are not decoration. You do not use the numbers sitting in the target's existing accounts, which are historical book values, often years out of date. You revalue everything at what it is actually worth on the day of the deal. A building bought decades ago and carried at cost may be worth several times its book figure. Equally, obsolete stock may be worth less.

The revaluation also sweeps in assets the target never recorded. Brands, patents, and customer contracts a company developed itself do not appear on its own balance sheet, but if they can be identified and valued separately in an acquisition, they must be recognised at fair value. Every asset pulled out and named that way reduces goodwill by the same amount, which matters because named assets and goodwill are treated very differently afterwards.

An acquisition, worked through

Say a company is bought for 500,000,000. Its assets are revalued at 620,000,000 and the liabilities coming with it are valued at 280,000,000.

• Net identifiable assets: 620,000,000 − 280,000,000 = 340,000,000
• Goodwill: 500,000,000 − 340,000,000 = 160,000,000

So 340 million of the price bought things that can be listed, and 160 million bought everything else, which is 32 percent of what was paid. On the buyer's balance sheet the day after the deal, that 160 million sits as an asset called goodwill, and what happens to it from then on is where the real interest lies.

Goodwill does not wear out, it collapses

Most assets are depreciated or amortised, worn down a slice at a time across their useful life, so their decline is gradual and predictable. Goodwill is not treated that way under either international standards or US rules for listed companies. It is not amortised at all.

Instead it is tested for impairment at least once a year. The company checks whether the part of the business the goodwill belongs to is still worth at least what the books say. If it is, the goodwill stays exactly where it is, unchanged, potentially for decades. If it is not, the shortfall is written off immediately as a loss in the profit statement, and under international rules that write-down can never be reversed even if the business later recovers.

The consequence is a very particular risk profile. Goodwill sits still, looking stable, until one day it does not. That is why goodwill impairments arrive as sudden, headline-sized announcements, often years after an overpriced acquisition, and often in a single enormous number rather than as a gentle decline nobody noticed. The write-down is really an admission that the price paid was too high, arriving long after the cheque cleared.

There are exceptions worth knowing. Some smaller-company frameworks, including the standards for smaller entities in several jurisdictions and an option available to private companies in the US, do allow goodwill to be amortised over a limited life. But for listed companies under the main standards, the impairment-only approach is what applies, and the standard setters have repeatedly considered amortisation and chosen to keep it that way.

When the number comes out negative

If the purchase price is less than the net identifiable assets, the calculator returns a negative figure. That is a bargain purchase, sometimes called negative goodwill, and it is unusual enough to be worth explaining.

It means the buyer paid less than the itemised things were worth, which raises an obvious question: why would anyone sell on those terms? Occasionally there is a genuine reason, most often a forced or distressed sale where the seller needed out quickly. Accounting standards treat the result with suspicion for exactly that reason. Before recognising anything, the acquirer is required to go back and check that every asset and liability was properly identified and valued, on the reasonable assumption that a negative result usually means something was measured wrong rather than that a bargain was struck.

If the negative figure survives that review, it is not recorded as an asset. It is recognised immediately as a gain in the profit statement. So a bargain purchase produces a one-off boost to reported profit rather than anything on the balance sheet, which is the mirror image of how positive goodwill behaves.

Questions people ask

What is actually inside goodwill?

Things of value that cannot be identified and valued separately: the workforce, customer loyalty, reputation, market position, and the synergies the buyer expects from combining the two businesses.

Do I use book values or fair values?

Fair values at the acquisition date, not the figures in the target's existing accounts. Historical book values will give you the wrong answer, sometimes badly wrong.

Is goodwill written down a bit each year?

Not for listed companies under the main standards. It is tested for impairment at least annually and written down only when the test fails, which tends to produce sudden large losses rather than gradual ones. Some frameworks for smaller and private entities do permit amortisation.

Can a company create goodwill without buying anything?

No. Internally generated goodwill cannot be recognised. It appears only when one business acquires another and pays more than the identifiable net assets are worth.

References

Goodwill is measured as the consideration transferred less the fair value of the identifiable net assets acquired, with a negative result treated as a gain on a bargain purchase after the acquirer has reassessed its measurements. Goodwill is not amortised; it is allocated to the parts of the business expected to benefit and tested for impairment at least annually, with any impairment recognised immediately in profit or loss. Both requirements are set out in the international accounting standards below.

1. IFRS Foundation, IFRS 3 Business Combinations. https://www.ifrs.org/issued-standards/list-of-standards/ifrs-3-business-combinations/
2. IFRS Foundation, IAS 36 Impairment of Assets. https://www.ifrs.org/issued-standards/list-of-standards/ias-36-impairment-of-assets/