finance calculator

M&A Accretion/Dilution Calculator

Analyze pro forma financial impacts, combined EPS, and synergy break-even targets for M&A deals.

Formula Verified by Dr. Elizabeth Vance, PhD

Quick actions: Save inputs, view saved runs, print, share, or export results

Saved Runs

Inputs

Buyer Profile

Buyer Net Income ($)$

Buyer Shares Outstanding

Buyer Share Price ($)$

Financing & Taxes

Debt Interest Rate (%)%

Foregone Cash Interest Rate (%)%

Tax Rate (%)%

Target Profile

Target Net Income ($)$

Target Shares Outstanding

Target Share Price ($)$

Deal Structure

Offer Premium (%)%

Cash Consideration Mix (%)%

Expected Pre-Tax Synergies ($)$

Results

Accretion / (Dilution) %

23.60%

Pro Forma Combined EPS

$6.18

Buyer Standalone EPS$5.00

Required Break-even Synergies$NaN

Total Purchase Price$NaN

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Deal structures adapt to interest rates and stock valuations. Save this page to rerun accretion/dilution models when consideration mix, interest rates, or synergies are updated.

Formula

Accretion / Dilution formula

\% \text{ Accretion} = \left( \frac{\text{Pro Forma EPS}}{\text{Buyer Standalone EPS}} - 1 \right) \times 100

Measures earnings change for buying company's shareholders.

Step by step

How the calculation works

1Input financials for both buyer and target (net income, share price, share count).
2Specify offer premium and consideration structure (cash vs stock consideration mix).
3Set debt interest rate, marginal tax rate, and expected pre-tax operating synergies.
4Review accretion/dilution output and required synergies to break even.

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Compare market, income, and asset valuation methods, normalize revenue and profit, and use multiples as a planning range rather than a formal appraisal.

Guide

ROI Calculation: Formula, Annualized Return, and Examples

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Inputs

Buyer Profile

Buyer Net Income ($)$

Buyer Shares Outstanding

Buyer Share Price ($)$

Financing & Taxes

Debt Interest Rate (%)%

Foregone Cash Interest Rate (%)%

Tax Rate (%)%

Target Profile

Target Net Income ($)$

Target Shares Outstanding

Target Share Price ($)$

Deal Structure

Offer Premium (%)%

Cash Consideration Mix (%)%

Expected Pre-Tax Synergies ($)$

How to understand and use this calculator

M&A Accretion and Dilution Analysis

Accretion/dilution analysis evaluates the financial impact of a proposed merger or acquisition on the buying company's Earnings Per Share (EPS). The primary goal is to determine if the combined company's EPS will increase (accretion) or decrease (dilution) compared to the buyer's standalone EPS.

An transaction is accretive when the combined pro forma earnings divided by the new share count is higher than the buyer's standalone EPS. It is dilutive when pro forma EPS falls below the buyer's standalone level.

The Pro Forma Net Income and Combined EPS Formulas

Calculating pro forma EPS requires estimating the combined net income and the new share count outstanding after transaction closing.

Pro Forma Net Income blends the earnings of the buyer and target, adjusts for transaction financing costs, and adds estimated synergies:

$$\text{Combined Net Income} = \text{Buyer Net Income} + \text{Target Net Income} + \text{After-Tax Synergies} - \text{After-Tax Financing Costs}$$

Where After-Tax Financing Costs include interest expense on new debt issued and foregone interest income on cash used to fund the purchase.

Pro Forma Shares Outstanding accounts for new buyer shares issued to target shareholders:

$$\text{Combined Shares} = \text{Buyer Shares} + \text{New Shares Issued}$$

$$\text{New Shares Issued} = \frac{\text{Equity Purchase Price} \times \text{Stock Consideration \%}}{\text{Buyer Share Price}}$$

Pro Forma EPS is then:

$$\text{Pro Forma EPS} = \frac{\text{Combined Net Income}}{\text{Combined Shares}}$$

The Impact of Deal Financing: Stock vs. Cash

The financing mix of a deal—cash, debt, or stock consideration—has a major impact on accretion/dilution.

Cash & Debt Financing: Cash is typically the cheapest source of financing, as the cost of debt (interest expense) is after-tax and foregone cash interest is low. Debt financing avoids equity dilution, but increases leverage and financial risk.

Stock Financing: Issuing new equity increases the share count, which dilutes the ownership percentage of existing shareholders. If the buyer's P/E ratio is higher than the target's P/E, a stock-for-stock deal is mathematically accretive. If the buyer's P/E is lower, the deal is dilutive unless significant synergies are achieved.

Synergy Break-Even Targets

Synergies are cost savings or revenue enhancements expected from combining corporate operations. The synergy break-even target represents the minimum pre-tax synergy required to make a dilutive deal break-even (0% accretion/dilution):

$$\text{Required Pre-Tax Synergies} = \frac{\text{Target Net Income} - \text{After-Tax Financing Costs} - \text{Dilution Impact}}{\text{1} - t}$$

Related concepts

Earnings Per Share (EPS)

A company's net income divided by its outstanding common shares.

P/E Ratio

Price-to-Earnings ratio, reflecting market valuation multiples.

Synergy

The financial benefit achieved through combining corporate assets and operations.

Frequently Asked Questions

What is the difference between cost synergies and revenue synergies?+

Cost synergies are savings achieved by eliminating redundant operations, headcount, or systems (often highly predictable). Revenue synergies are additional sales achieved by cross-selling products or entering new markets (harder to estimate).

Why would a buyer execute a dilutive acquisition?+

A buyer might pursue a dilutive transaction if the target has high growth potential, proprietary technology, or strategic positioning that will accelerate long-term earnings, despite short-term EPS dilution.

How does the buyer's P/E ratio affect a stock deal?+

In an all-stock deal, if the buyer's P/E is greater than the target's P/E, the transaction is accretive. If the buyer's P/E is lower than the target's P/E, the transaction is dilutive.

What are transaction adjustments in M&A?+

Adjustments include subtracting after-tax interest expenses on new debt, subtracting foregone interest on cash used, adding synergies, and adjusting for depreciation and amortization write-ups.

How do you calculate new shares issued in a deal?+

New shares issued = (Purchase Price × Stock Consideration %) / Buyer's Share Price.

What is foregone interest on cash?+

It is the interest income a company loses by spending its cash balance on an acquisition rather than leaving it in interest-bearing accounts. It is subtracted from pro forma earnings.

What is purchase price allocation (PPA)?+

PPA is the accounting process of allocating the purchase price to the target's tangible and intangible assets, with the remainder capitalized as goodwill. This can increase pro forma depreciation and amortization.

How does interest rate affect deal accretion?+

Higher interest rates increase the borrowing cost of debt financing, which reduces pro forma net income and makes deals less accretive or more dilutive.

What is a stock-for-stock merger?+

It is a transaction where the target shareholders exchange their shares for newly issued shares of the buying company at a specified exchange ratio.

How is accretion/dilution percentage calculated?+

Accretion/Dilution % = [(Pro Forma EPS / Standalone Buyer EPS) - 1] × 100.

How the calculation works

1Input financials for both buyer and target (net income, share price, share count).

2Specify offer premium and consideration structure (cash vs stock consideration mix).

3Set debt interest rate, marginal tax rate, and expected pre-tax operating synergies.

4Review accretion/dilution output and required synergies to break even.

How to understand and use this calculator

M&A Accretion and Dilution Analysis

The Pro Forma Net Income and Combined EPS Formulas

Calculating pro forma EPS requires estimating the combined net income and the new share count outstanding after transaction closing.

Pro Forma Net Income blends the earnings of the buyer and target, adjusts for transaction financing costs, and adds estimated synergies:

$$\text{Combined Net Income} = \text{Buyer Net Income} + \text{Target Net Income} + \text{After-Tax Synergies} - \text{After-Tax Financing Costs}$$

Where After-Tax Financing Costs include interest expense on new debt issued and foregone interest income on cash used to fund the purchase.

Pro Forma Shares Outstanding accounts for new buyer shares issued to target shareholders:

$$\text{Combined Shares} = \text{Buyer Shares} + \text{New Shares Issued}$$

$$\text{New Shares Issued} = \frac{\text{Equity Purchase Price} \times \text{Stock Consideration \%}}{\text{Buyer Share Price}}$$

Pro Forma EPS is then:

$$\text{Pro Forma EPS} = \frac{\text{Combined Net Income}}{\text{Combined Shares}}$$

The Impact of Deal Financing: Stock vs. Cash

The financing mix of a deal—cash, debt, or stock consideration—has a major impact on accretion/dilution.

Synergy Break-Even Targets

$$\text{Required Pre-Tax Synergies} = \frac{\text{Target Net Income} - \text{After-Tax Financing Costs} - \text{Dilution Impact}}{\text{1} - t}$$

Related concepts

Earnings Per Share (EPS)

A company's net income divided by its outstanding common shares.

P/E Ratio

Price-to-Earnings ratio, reflecting market valuation multiples.

Synergy

The financial benefit achieved through combining corporate assets and operations.

Frequently Asked Questions

What is the difference between cost synergies and revenue synergies?+

Why would a buyer execute a dilutive acquisition?+

How does the buyer's P/E ratio affect a stock deal?+

In an all-stock deal, if the buyer's P/E is greater than the target's P/E, the transaction is accretive. If the buyer's P/E is lower than the target's P/E, the transaction is dilutive.

What are transaction adjustments in M&A?+

Adjustments include subtracting after-tax interest expenses on new debt, subtracting foregone interest on cash used, adding synergies, and adjusting for depreciation and amortization write-ups.

How do you calculate new shares issued in a deal?+

New shares issued = (Purchase Price × Stock Consideration %) / Buyer's Share Price.

What is foregone interest on cash?+

It is the interest income a company loses by spending its cash balance on an acquisition rather than leaving it in interest-bearing accounts. It is subtracted from pro forma earnings.

What is purchase price allocation (PPA)?+

How does interest rate affect deal accretion?+

Higher interest rates increase the borrowing cost of debt financing, which reduces pro forma net income and makes deals less accretive or more dilutive.

What is a stock-for-stock merger?+

It is a transaction where the target shareholders exchange their shares for newly issued shares of the buying company at a specified exchange ratio.

How is accretion/dilution percentage calculated?+

Accretion/Dilution % = [(Pro Forma EPS / Standalone Buyer EPS) - 1] × 100.

M&A Accretion/Dilution Calculator

Inputs

Buyer Profile

Financing & Taxes

Target Profile

Deal Structure

Results

Bookmark this M&A Calculator

Accretion / Dilution formula

How the calculation works

Learn more about this calculation

Business Valuation Methods: A Practical Owner Guide

ROI Calculation: Formula, Annualized Return, and Examples

M&A Accretion/Dilution Calculator

Inputs

Buyer Profile

Financing & Taxes

Target Profile

Deal Structure

Results

Bookmark this M&A Calculator

Key output metrics

Earnings Per Share Comparison

How to understand and use this calculator

M&A Accretion and Dilution Analysis

The Pro Forma Net Income and Combined EPS Formulas

The Impact of Deal Financing: Stock vs. Cash

Synergy Break-Even Targets

Related concepts

Frequently Asked Questions

Accretion / Dilution formula

How the calculation works

Learn more about this calculation

Business Valuation Methods: A Practical Owner Guide

ROI Calculation: Formula, Annualized Return, and Examples

Key output metrics

Earnings Per Share Comparison

How to understand and use this calculator

M&A Accretion and Dilution Analysis

The Pro Forma Net Income and Combined EPS Formulas

The Impact of Deal Financing: Stock vs. Cash

Synergy Break-Even Targets

Related concepts

Frequently Asked Questions