What it means
The deal sense is the one most often heard in boardrooms. If a company's earnings per share rise after an acquisition, the deal is accretive, and if they fall it is dilutive, which is the opposite of accretion.
Whether a deal is accretive depends mostly on the relative price of earnings on each side. Buying a company on a lower earnings multiple than your own, or funding the purchase with cheap debt rather than issuing new shares, tends to produce accretion almost mechanically.
That is exactly why accretion should never be the sole test of a good acquisition. A cheap business bought with borrowed money can lift earnings per share in year one while adding significant risk, and a genuinely valuable business can be dilutive at first and still be the right purchase.
The bond sense is quieter but affects reported profit every period. When an investor buys a bond below its face value, that discount is not a windfall at maturity; it is recognised gradually as extra interest income across the life of the bond, which is the accretion of the discount.
The same mechanism applies to zero coupon bonds, which pay no cash interest at all and are bought at a deep discount. The holder still reports interest income every year as the carrying value accretes towards face value, and in many jurisdictions pays tax on income no cash has yet arrived to cover.
Analysts usually test accretion on a pro forma basis before a deal closes. They combine both companies' expected earnings, adjust for financing costs and any planned savings, then divide by the enlarged share count to see whether the arithmetic still works.
In practice
Real-world examples.
Example
A listed logistics group trading on 22 times earnings acquires a family-owned haulier valued at 9 times earnings. The chief financial officer presents the transaction as 6% accretive in the first full year, driven almost entirely by the gap between the two multiples.
Example
An insurer buys a corporate bond with a $10,000 face value for $9,200 with four years to run. It accretes $800 / 4 = $200 of the discount into interest income each year, so its reported yield exceeds the bond's coupon rate.
Example
A technology company issues shares to acquire a fast-growing but loss-making competitor. The deal is dilutive for two years, and management has to explain to shareholders why the strategic fit justifies accepting short-term dilution rather than chasing accretion.
Think of it
“Accretion is gradual buildup of value-either a bond growing toward face value or EPS increasing from a deal.
Formula
Calculation
Earnings per share accretion = pro forma combined EPS - acquirer standalone EPS
Straight-line bond accretion per year = (face value - purchase price) / years to maturity
An acquirer earns net income of $40,000,000 with 20,000,000 shares in issue, so its standalone earnings per share is $40,000,000 / 20,000,000 = $2.00. It buys a target earning $6,000,000 a year by issuing 2,000,000 new shares.
Combined net income is $40,000,000 + $6,000,000 = $46,000,000 and the combined share count is 20,000,000 + 2,000,000 = 22,000,000, giving pro forma earnings per share of $46,000,000 / 22,000,000 = $2.09. The accretion is $2.09 - $2.00 = $0.09 per share, or about 4.5%, so the deal is accretive before any cost savings are counted.Case study
Seen in the real world.
This is an illustrative and clearly fictional scenario. Verity Dental Partners, an invented consolidator of dental practices, built its whole strategy on accretion: it traded at 18 times earnings and bought individual practices at 5 times earnings, funded with a mixture of shares and bank debt.
For four fictional years the arithmetic worked beautifully, with earnings per share rising every period and the share price following. What the headline accretion masked was that debt had climbed to nearly four times earnings before interest, tax, depreciation and amortisation, and that practice-level profits were slipping as founding dentists retired after their earn-outs ended.
When interest rates rose, the acquisition pipeline stopped, the underlying decline became visible, and earnings per share fell for the first time. The illustrative lesson is that accretion measures the shape of a transaction, not the quality of the business being bought.
Watch out
Common mistakes.
- Treating accretion as proof that an acquisition creates value, when it only shows the arithmetic effect on earnings per share.
- Ignoring the financing cost in the calculation, so a deal funded with expensive debt is presented as accretive when interest turns it dilutive.
- Confusing the deal sense with the bond sense and assuming accretion always refers to acquisitions, which causes confusion in mixed finance and treasury discussions.
Questions
People also ask.
What is the opposite of accretion?
Dilution, meaning a fall in earnings per share, most often caused by issuing shares to fund a purchase that earns less than the shares cost.
Is bond accretion taxable before the cash arrives?
In many cases yes, particularly for zero coupon and deeply discounted bonds, which is why they are often held inside tax-sheltered accounts.
Does accretion always show up in the first year?
Not necessarily, since integration costs and purchase accounting adjustments frequently make a deal dilutive initially and accretive only from the second or third year.
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