Accretion/Dilution Analysis Cheat Sheet
Core Concept
Pro Forma EPS < Standalone Buyer EPS → Dilutive
Step-by-Step Calculation
| Step | Action | Detail |
|---|---|---|
| 1 | Buyer Standalone EPS | Buyer Net Income ÷ Buyer Diluted Shares Outstanding |
| 2 | Target Net Income | Target’s projected net income for the analysis period |
| 3 | Financing Adjustments | Add after-tax cost of debt issued; subtract lost interest on cash used |
| 4 | Synergies (after-tax) | Add estimated cost and/or revenue synergies net of tax |
| 5 | New Shares Issued | Calculate new shares if stock is part of deal consideration |
| 6 | Pro Forma Net Income | Buyer NI + Target NI + Synergies – Financing Costs ± Adjustments |
| 7 | Pro Forma Shares | Buyer Shares + New Shares Issued |
| 8 | Pro Forma EPS | Pro Forma Net Income ÷ Pro Forma Shares |
| 9 | Accretion / Dilution | (Pro Forma EPS – Buyer Standalone EPS) ÷ Buyer Standalone EPS |
Key Drivers of Accretion vs. Dilution
| Factor | More Accretive When… | More Dilutive When… |
|---|---|---|
| Purchase Price | Lower multiple paid (cheaper deal) | Higher premium paid |
| Financing Mix | More cheap debt, less equity issued | More equity issued (dilutes share count) |
| Target P/E vs. Buyer P/E | Target P/E < Buyer P/E | Target P/E > Buyer P/E |
| Synergies | Large, achievable synergies | Minimal or uncertain synergies |
| Interest Rate | Low cost of debt financing | High borrowing costs |
| Tax Rate | Higher tax rate (bigger interest tax shield) | Lower tax rate |
The P/E Arbitrage Rule
There’s a simple shortcut: if the buyer’s P/E ratio is higher than the target’s P/E ratio, an all-stock deal will be accretive (before synergies and adjustments). The buyer is “paying” with an expensive currency (high-P/E stock) to buy cheaper earnings. Conversely, a low-P/E buyer acquiring a high-P/E target with stock will face dilution.
Buyer P/E < Target P/E → Dilutive
Common Adjustments in the Model
| Adjustment | Impact on Pro Forma EPS | Explanation |
|---|---|---|
| Goodwill and Intangibles | Negative (amortization of intangibles) | Purchase price above book value creates intangible assets with amortization |
| D&A Write-Up | Negative | Stepped-up asset values increase depreciation expense |
| Interest Expense (new debt) | Negative | After-tax cost of debt used to finance the deal |
| Lost Interest Income | Negative | Foregone interest on cash used for purchase price |
| Cost Synergies | Positive | Headcount reductions, facility closures, procurement savings |
| Revenue Synergies | Positive | Cross-selling, new markets (harder to achieve, often discounted) |
Key Takeaways
- Accretive = pro forma EPS exceeds buyer standalone EPS; dilutive = the opposite.
- The P/E arbitrage rule gives a quick directional answer for all-stock deals.
- Financing mix is the biggest lever — more debt (if cheap) makes deals more accretive, more equity makes them dilutive.
- Synergies can turn a dilutive deal into an accretive one — quantify them conservatively.
- This analysis works alongside deal structure decisions and the broader M&A process.
FAQ
What does it mean when a deal is accretive?
An accretive deal increases the acquirer’s earnings per share. The combined entity earns more per share than the buyer did on a standalone basis. This is generally viewed positively by the buyer’s shareholders.
Is an accretive deal always a good deal?
No. A deal can be accretive but still destroy value if the buyer overpays relative to the target’s intrinsic value. Accretion is an accounting measure, not a value creation measure. A DCF analysis is needed to assess true value creation.
How do synergies affect accretion/dilution?
After-tax synergies directly increase pro forma net income, making deals more accretive. Cost synergies (headcount, facilities) are more reliable. Revenue synergies are harder to achieve and typically discounted 50% or more in models.
Why does the financing mix matter so much?
Debt financing adds interest expense but doesn’t increase share count. Equity financing doesn’t add interest but does increase share count. Since EPS = Net Income ÷ Shares, the trade-off between higher income drag (debt) and higher share count (equity) determines the accretion/dilution outcome.
What is the breakeven synergy in accretion/dilution analysis?
The breakeven synergy is the minimum amount of after-tax synergies needed to make a dilutive deal break even on an EPS basis. It’s calculated by finding the synergy level where pro forma EPS equals the buyer’s standalone EPS.