Modeling Purchase Price Allocation (PPA)

Say a company pays $500 million for a business whose balance sheet shows $200 million of net assets. The buyer can't book that as one line called "the price we paid." Under acquisition accounting, the target's balance sheet gets rebuilt from scratch: the assets acquired and liabilities assumed are re-measured at fair value as of the acquisition date.

Some assets get written up. New intangibles the target never recorded, like its brand and customer relationships, go on the books for the first time. Whatever purchase price remains after that becomes goodwill.

This process is called purchase price allocation. It's one of the most common technical topics an analyst runs into while building a merger model.

Get it wrong, and three parts of the model break at once:

• Goodwill: Goodwill is whatever's left over: the purchase price minus the fair value of everything identifiable the buyer took on, assets less liabilities. Any goodwill already sitting on the target's books gets wiped out and replaced by this new number. And if the buyer somehow paid less than the net assets are worth, there's no negative goodwill. The difference is recorded as a gain on the bargain purchase, which is rare enough that auditors will question.
• D&A: PP&E and short-term intangibles like customer relationships and technology get depreciated or amortized over their useful lives. This gets carried forward on post-deal earnings. The short-term intangibles (often trade names) and goodwill aren't amortized. They're tested for impairment instead. An inventory step-up hits COGS as that inventory sells, usually within the first quarter or two.
• Deferred taxes: in a typical stock purchase, the step-up exists only on the books. The tax basis stays where it was, so the extra D&A never becomes deductible, and you record a deferred tax liability to reflect that gap. Structure the deal as an asset purchase, or use a 338(h)(10) election in the US, and the tax basis steps up too. The DTL largely disappears.

This guide covers what purchase price allocation means, the full step-by-step process, the goodwill formula, a worked example with real numbers, and how it all flows into the financial statements.

What is Purchase Price Allocation?

Purchase price allocation, often shortened to PPA, is how an acquirer properly records what it bought.

When one company acquires another, it can’t just record one lump sum as the “cost of doing business.” Standard accounting rules require it to identify every asset and liability it acquired. Each one gets recorded at fair value, that is, what the item is worth today, not the old number sitting on the target's balance sheet.

Everything the buyer picked up gets a fair value on the closing date. Three of those categories are things you can point at and measure. The fourth is what's left over.

1. Tangible assets like property, equipment, and inventory are marked up or down to their fair value.
2. Identifiable intangible assets such as customer relationships, technology, patents, and trademarks.
3. Assumed liabilities — the target's existing obligations that carry over to the buyer, from payables to any debt that isn't repaid at close, each remeasured at fair value. A new deferred tax liability usually shows up here too, created when the asset write-ups count for book purposes but not for tax.
4. Liabilities work in the other direction. Assuming more of the target's obligations doesn't shrink the purchase price — it shrinks what the buyer actually received, which means more of the price ends up in goodwill.
5. Goodwill, which covers whatever purchase price is left after the first three are accounted for.

Goodwill catches everything that doesn't come with a price tag. An assembled workforce is explicitly barred from separate recognition, so its value folds into goodwill. Buyer-specific synergies land there too, since the cost savings and cross-selling only exist because of this specific combination and have no standalone fair value on their own. A brand itself usually isn't one of these. If it's protected by a trademark, it gets valued separately, the same as any other identifiable intangible.

Worth separating two things that share a name. This guide covers book purchase accounting under ASC 805 — the version that shows up in a merger model and on the acquirer's financial statements. A parallel tax allocation under Section 1060 applies to asset deals and to stock deals structured with a 338(h)(10) election. Different rules, different form, and a very different answer on whether the write-ups are deductible. We'll come back to why that changes the deferred tax picture.

Why Purchase Price Allocation Matters in M&A

Purchase price allocation isn't just a bookkeeping exercise; it decides the numbers that will show up in the model, the earnings, and the pitch.

Three things are built from it.

It Sets the Goodwill Number

Goodwill lands on the balance sheet and stays there. For public companies under US GAAP, it never amortizes; instead it gets tested for impairment once a year, and again any time something happens that suggests the business is worth less than the books say. Private companies get a shortcut: they can elect to amortize goodwill over ten years and skip the annual test. IFRS filers follow the public-company approach, no amortization either way. One detail worth holding onto: the test runs at the reporting-unit level, so a buyer can write off goodwill from one bad acquisition while everything else hums along.

If the acquired business underperforms, the buyer writes down the goodwill, and that write-down is often the largest single line in the quarter it happens. Kraft Heinz took a $15.4 billion impairment in Q4 2018. Teladoc took $13.7 billion across 2022. These charges can recur in consecutive periods as a business keeps deteriorating, and under US GAAP the write-down is permanent — goodwill impairment can never be reversed, even if the business recovers later. The charge is non-cash, which is why analysts add it back and why management calls it “a non-cash accounting adjustment” on the earnings call.

It Creates New Depreciation and Amortization

This is the part that connects straight to the merger model. When the buyer marks up the target's assets, those written-up values will get depreciated and amortized going forward.

The target was already depreciating its existing fixed assets; that part doesn't change. What's new is the incremental piece: depreciation on the step-up above the old book value, plus amortization of intangibles the target never carried on its books. That incremental expense drags on pro forma net income, and anyone running an accretion/dilution analysis subtracts it as a standard adjustment.

How the split falls decides the size of that drag. The more of the price that lands on identifiable intangibles, the more amortization the buyer carries; whatever stays in goodwill doesn't amortize at all. That's not a dial management gets to turn; appraisers set fair values against defined criteria, but the assumptions underneath matter, and useful life matters as much as the amount. A $200 million customer relationship written off over five years costs $40 million a year. Stretch it to fifteen, and it costs $13 million. Same allocation, very different accretion.

It Creates A Deferred Tax Liability

Write-ups raise an asset's book value. They do not usually raise its tax basis. This mismatch means the buyer will pay more tax later than the books suggest, so for now, it records a liability. 

The size is straightforward: the write-up multiplied by the buyer's tax rate. A $200 million step-up at 25% creates a $50 million deferred tax liability. It doesn't sit there forever, either — it unwinds as the extra book depreciation and amortization run through, releasing a non-cash tax benefit each year that softens the earnings drag. And in a deal structured so the step-up is tax-deductible, there's no mismatch and no deferred tax liability. That's why structure matters so much, and we'll come back to it.

Analysts miss this one entry constantly. It shows up on the balance sheet, it shrinks the identifiable net assets figure, and it makes goodwill bigger.

So the allocation isn't neutral. Where the money lands changes reported earnings, changes the balance sheet, and changes the story management tells about the deal.

Step-by Step Process of Purchase Price Allocation

Every purchase price allocation comes from the same six steps. Get the order right, and the goodwill number comes out on its own.

Step 1. Nail down the purchase price.

Start with the consideration transferred for the target's equity — cash, the fair value of any stock issued, and the fair value of earn-outs or other contingent payments. Assumed debt is not part of this number; it shows up in step 3 as a liability. Neither are the banker and legal fees, which get expensed as incurred rather than capitalised into the deal.

Step 2. Pull up the target's book value of net assets.

Take the target's balance sheet as it stands: total assets minus total liabilities. Two things get stripped out before that number means anything. Any goodwill the target already carries from its past acquisitions goes to zero. It has no standalone fair value, and you're about to calculate fresh goodwill from scratch anyway. Its existing equity accounts disappear too, replaced by whatever the buyer paid. What's left is your starting point, and it's almost never what the assets are really worth.

Step 3. Mark tangible assets to fair value.

Property, plant, equipment, inventory. A factory carried at $40 million might appraise at $70 million. Here, the $30 million gap is a write-up.

Write-downs may also occur; for instance, obsolete inventory gets marked down, not up.

Step 4. Identify and value the intangibles.

This is where the real judgment lives. An intangible only comes out of goodwill and onto its own line if it clears one of two tests: it has to come from a contract or a legal right, or it has to be separable enough to sell on its own. A trademark clears that bar easily. A well-trained workforce doesn't, which is why its value disappears into goodwill instead.

Each qualifying intangible gets valued separately, usually with its own useful life attached. Customer relationships typically get a multi-period excess earnings model. Trade names usually get relief-from-royalty. Some assets, like an established brand the buyer plans to run indefinitely, have no finite life and are impairment-tested instead of amortized.

Valuation specialists usually run this piece. In a model, you'll see it as an assumption you flex.

Step 5. Book the deferred tax liability.

Steps 3 and 4 raised the book value of assets. In a stock deal, the tax basis usually doesn't move, so multiply the total write-up by the tax rate and you get the liability. In a taxable structure instead, an asset purchase, or a stock deal with a 338(h)(10) election, the tax basis steps up right alongside the book basis. No mismatch, no deferred tax liability at all. One more wrinkle worth knowing: no deferred tax gets recorded on goodwill itself in a non-taxable deal, which is why this calculation runs off the write-ups only and doesn't spiral into itself.

This reduces your identifiable net assets, which pushes goodwill higher.

Step 6. Solve for goodwill.

Goodwill is what's left. Take the purchase price and subtract everything you just identified. Whatever remains is goodwill.

That sequence matters. Skip step 5, and your goodwill comes out too low. If you value the intangibles too aggressively in step 4, you'll give the buyer more amortization than it needs to carry.

WSO's M&A modeling course walks through this build inside a live merger model.

The Goodwill Formula 

The formula itself is simple.

Goodwill = purchase price − fair value of identifiable net assets acquired

The trap is in the middle term. "Identifiable net assets" has a lot of components, and most people gloss over it.

Now, to break it down. Start with the target's assets, but at fair value, not book value. This means every write-up from step 3 and every intangible you named in step 4 should already be worked in.

Then subtract the liabilities the buyer assumed: debt, payables, accrued expenses, all of it.

Next, subtract the deferred tax liability you found in step 5. This one catches people. It's a liability the target never had, and was created purely by the write-ups. It shrinks the identifiable net assets.

Smaller identifiable net assets mean bigger goodwill. This is true always.

Here's the part worth understanding. You never calculate goodwill on its own. There is no goodwill valuation model, no goodwill multiple, no comparable goodwill analysis. It is simply a plug.

Everything else gets a value first. Goodwill absorbs whatever is left over.

That's why goodwill expands when a buyer overpays. Pay $650 million for a company whose identifiable net assets are worth $450 million, and you're facing $200 million of goodwill. The market's judgment about whether that premium was justified will show up years later, if, of course, the buyer has to impair it.

One more thing interviewers like to hear. Goodwill cannot be negative. If the purchase price comes in below the fair value of identifiable net assets, that's a bargain purchase, and the difference gets recorded as a gain on the income statement instead. It's rare, and it usually signals a distressed seller.

A Worked Example of Purchase Price Allocation

Numbers make this all real; here's the same deal from start to finish.

A buyer pays $650 million for a target. The target's balance sheet shows $400 million of net assets. That $250 million gap has to land somewhere.

That's the $250 million from the opening, fully accounted for. $120 million went into assets the buyer can now point to — the plant write-up and the intangibles, net of the deferred tax. The remaining $130 million had nowhere else to go.

Valuation work sources two new write-ups. The target's plants and equipment appraise $60 million above book value. Its customer relationships and technology are worth $100 million, and none of these are found on the books today.

The tax rate is 25%.

The deferred tax liability comes from the write-ups. The buyer raised the book value of those assets by $160 million. The tax basis did not move, so it books $40 million in tax to be paid later.

That liability shrinks identifiable net assets: smaller net assets, bigger goodwill.

Goodwill lands at $130 million, with purchase price of $650 million minus $520 million of identifiable net assets. Nothing calculated that number directly. It's whatever was left.

The $100 million of intangibles amortizes over ten years — $10 million a year of expense the target never carried, because those assets were never on its books. The $60 million PP&E write-up depreciates too; over a 20-year remaining life, that's another $3 million. Call it $13 million a year of incremental D&A, all of it created by the allocation.

That $13 million is pre-tax. In an accretion/dilution model, you tax-effect it — at 25%, roughly $9.75 million a year off pro forma net income. The deferred tax liability is what does the tax-effecting: it unwinds as the write-ups depreciate and amortize, releasing a non-cash benefit that offsets part of the charge. The allocation you just ran is where every one of those numbers came from.

One caveat on the deferred tax liability: it shows up in a stock deal, where the target's tax basis carries over unchanged. In an asset deal, the tax basis steps up with the write-ups, so there's no mismatch and no liability. There's a third case worth knowing, too: a stock purchase with a 338(h)(10) or 336(e) election is legally a stock deal but taxed as an asset deal, which is how many private-company acquisitions actually get done. Make sure to check which of the three you're modeling before you book it.

How Asset Write-ups And Intangibles Work

Steps 3 and 4 are where the real work happens. They're also where two analysts can look at the same deal and find two different numbers.

Tangible write-ups are the easy part.

The target's balance sheet holds assets at what it paid for them, minus years of depreciation. For example, a warehouse bought in 2008 may sit at $12 million on the books, then appraise at $35 million today.

On the buyer's books, that warehouse becomes a brand-new asset at $35 million, with accumulated depreciation reset to zero and a fresh useful life assigned. The full $35 million depreciates going forward. The $23 million write-up is the incremental piece relative to what the target was already carrying, and it's the number you actually model as the new expense created by the deal.

Write-downs happen too, just less often. Inventory that no one wants is marked below book.

Intangible assets are where judgment decisions happen.

Most of a target's intangibles are never recorded. A company doesn't enter its own customer list as an asset. But when someone buys that company, those relationships get valued and put on the balance sheet.

Four categories show up over and over:

1. Customer relationships. Existing contracts and the revenue they'll produce. Usually amortized over five to fifteen years.
2. Developed technology. Software, platforms, proprietary systems. Shorter lives, often three to seven years.
3. Trade names and trademarks. Sometimes indefinite-lived, in which case they don't amortize at all.
4. Patents and licenses. Amortized over the legal or useful life, whichever runs out first.

Here's the connection worth understanding. Every dollar you put into identifiable intangibles is a dollar that doesn't become goodwill.

Most identifiable intangibles amortize. Goodwill, for a public filer, doesn't. That's the whole trade-off: a bigger intangible balance means a bigger annual expense running against reported earnings, sometimes for a decade or more. The exception cuts both ways;  an indefinite-lived trade name sits on the books without amortizing either, which is why buyers and their appraisers spend real time arguing about whether a brand has a finite life.

That's why buyers sometimes push valuation specialists toward a shorter list of identifiable intangibles: less amortization, cleaner earnings, and more goodwill on the balance sheet.

The catch is that goodwill carries impairment risk. Push too much into it and one bad year forces a write-down that appears in a single quarter.

There's a reason buyers care where the line falls. Amortization of identifiable intangibles is a predictable annual expense. Goodwill sits on the balance sheet and costs nothing until something goes wrong. So buyers do lean on the process. Not by arguing an asset doesn't exist, since the recognition criteria aren't up for negotiation and the conclusion has to survive an audit, but by pushing on useful lives and discount rates, where the judgment genuinely lives.

It's a weaker play than it looks. Plenty of investors back amortization of acquired intangibles out of adjusted EPS anyway, so the “cleaner earnings” benefit largely evaporates for a well-covered public acquirer. And goodwill isn't free, either. Amortization is a known cost spread over a decade. Impairment is a single number, decided by how badly the business underperforms, and it arrives in a headline.

Goodwill and Deferred Taxes in Purchase Price Allocation

Two items will come out of a PPA that analysts get asked about constantly. And neither behaves the way you would expect.

Goodwill Sits still Until It Doesn't.

It lands on the balance sheet at closing — provisionally. The buyer has up to a year to finalize the allocation, and every revision in that window moves goodwill. After that, it stays put for public filers, amortizing nothing, until something goes wrong.

That sounds harmless. It isn't.

Every year, the buyer has to check whether the reporting unit carrying that goodwill is still worth at least its book value. Most companies start with a qualitative screen: has anything happened that suggests it isn't? And only run the full numbers if something has. If the reporting unit's fair value comes in below its carrying amount, the gap gets written off, up to the full goodwill balance. There's no separate valuation of goodwill itself; the charge is simply the shortfall.

Impairments are lumpy, and they're brutal. A company can carry goodwill quietly for six years, then take a multibillion-dollar charge in one quarter when the acquired business misses badly enough.

It's also worth knowing how this plays out internationally, and the story is narrower than it sounds. IFRS, which every listed company in the EU reports under, also doesn't permit goodwill amortization. IFRS 3 and IAS 36 require the same impairment-only testing as US GAAP for public companies. The frameworks that do amortize goodwill are specific local GAAPs: UK FRS 102 for non-listed British companies, Japanese GAAP, and a handful of others. A target's home-country accounting doesn't actually carry over to the deal, either; when a US buyer acquires a company, it consolidates under US GAAP, converting the target's books rather than keeping them. The exception that actually matters here: US private companies can elect to amortize goodwill over ten years, the same election mentioned earlier in this guide.

The Deferred Tax Liability Is The Entry People Forget

Write-ups raise what an asset is worth on the books. They usually don't change what it's worth for tax purposes. Tax authorities don't care that a buyer paid a premium.

So the buyer ends up depreciating $35 million of the warehouse on its financial statements while only being allowed to depreciate $12 million on its tax return. Less tax deduction than the books suggest means more cash tax later on.

Accounting requires recording that future tax now. Multiply the total write-up by the tax rate and enter it as a liability.

It doesn't sit there. Each year the buyer books more depreciation on the warehouse than the tax authority allows, so its reported tax expense runs below what it actually pays. The deferred tax liability absorbs that gap and shrinks a little every year, until the asset is fully depreciated and the liability is gone. That's also why the earnings drag from the write-ups is an after-tax number.

In your worked example, $160 million of write-ups at a 25% rate produced $40 million.

Now here's the part that trips people up. That liability reduces identifiable net assets, which makes goodwill larger. List the write-ups without the deferred tax liability and your goodwill comes out $40 million short.

These two numbers move together. Every write-up creates tax drag, and every dollar of tax drag pushes more of the price into goodwill.

Purchase Price Allocation For Private Companies

Everything so far assumed a clean set of numbers. Private companies, however, are messier, and most acquisitions involve one.

Many Have Never Been Through A PPA Before

A public company that has made acquisitions has already marked a lot of its assets to fair value. Every deal it did came with its own purchase price allocation. A founder-owned business that has run for thirty years hasn't. Its land, buildings, and equipment sit at what it paid for them, sometimes decades ago, less years of depreciation. The write-ups when it finally sells can be enormous. Land is often the biggest single item, and it never depreciates, so it inflates goodwill and the balance sheet without ever touching earnings.

This means bigger write-ups. Bigger write-ups mean more depreciation and amortization against future earnings. If the deal is done as a stock purchase, a bigger deferred tax liability too. The next question is whether it's a stock purchase.

The Starting Numbers Are Less Reliable

A public target comes with audited financials and years of footnotes. A smaller private target often doesn't. Its statements may be reviewed rather than audited, or kept on a tax or cash basis instead of GAAP. Before anyone can allocate anything, the balance sheet usually has to be rebuilt first, which is a big part of what a quality-of-earnings report is for.

Valuation specialists do the heavy lifting here. They appraise the plants, model the customer relationships, and put a number on the trade name. Their judgment moves the allocation more than anything you do in Excel.

Deal Structure Changes The Tax Answer

Private deals are frequently structured as asset purchases rather than stock purchases. Here’s why that is important. In an asset deal, the tax basis increases alongside the book values, so the mismatch neutralizes and no deferred tax liability gets recorded.

Buyers push for that structure mainly because it gives them a bigger tax deduction in the future. Sellers usually resist, since it can trigger a worse tax outcome on their end.

In an asset deal, there's a second allocation running alongside the accounting one: the tax allocation, and that one genuinely is negotiated. Buyers want as much as possible assigned to equipment and inventory, which they can write off quickly. Sellers want it parked in goodwill, which gets taxed at capital gains rates instead of as ordinary income. The number they settle on goes into the purchase agreement, and both sides report it to the IRS the same way. The book allocation stays with the buyer and its auditors. The tax allocation is a deal term.

The framework doesn't change with a private target. The inputs get softer, the write-ups get larger, and more of the answer depends on who appraised what.

How Purchase Price Allocation Affects The Financial Statements

Run both the allocation and the three statements change at once. This is where the accounting stops being theoretical and becomes practical.

Balance Sheet

The written-up assets show up at their new values. Property that was carried at $12 million now sits at $35 million. Intangibles that never appeared before now have a line.

Match it to the worked example: the buyer's $650 million shows up on one side, balanced by $520 million of identifiable net assets and $130 million of goodwill on the other. Every dollar of the purchase price is sitting somewhere on this balance sheet.

Goodwill is recognized as its own asset. The deferred tax liability is entered on the other side.

If the deal was funded with debt, that debt is recognized too; now the target's old equity gets wiped out in consolidation.

Income Statement

This is the statement that changes the most. The step-up on PP&E adds depreciation on top of what the target was already carrying. The intangibles are new outright, since the target never had them on its books at all, so all of their amortization is new expense.

In the worked example, that's $10 million a year of amortization on the intangibles, plus another $3 million of depreciation on the PP&E step-up at a 20-year remaining life. Call it $13 million a year of pre-tax expense that didn't exist before the deal. At a 25% rate, that's $9.75 million of net income gone every year for a decade. An inventory step-up, if the deal had one, would show up here too — it usually hits cost of goods sold within the first quarter or two after close, which is why an acquirer's reported gross margin often dips right after closing.

That number is exactly what gets subtracted in an accretion/dilution model. The allocation created it.

Cash Flow Statement

Start with the income statement. Net income is down $9.75 million — $13 million of incremental depreciation and amortization, less a $3.25 million deferred tax benefit as the DTL unwinds. In the cash flow statement, both of those reverse, because neither involved cash: add back the $13 million of D&A, then subtract the $3.25 million deferred tax benefit. Net effect on operating cash flow: zero. Lower earnings, same cash.

In a stock deal, the allocation makes reported earnings look worse without changing cash at all. In an asset deal, it does better than that: the amortization is tax-deductible, so the same write-ups that drag on earnings put real cash back in the buyer's pocket every year. Same allocation, different structure, different cash. Knowing that difference is what separates reading the statements from understanding them.

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