EARNINGS PER SHARE (IAS 33): COMPLETE GUIDE TO BASIC EPS, DILUTED EPS, CALCULATIONS, EXAMPLES, AND FINANCIAL REPORTING
Earnings per share is one of the most important metrics in financial reporting. It tells investors how much profit a company has generated for each ordinary share outstanding. For companies with publicly traded shares, EPS is a critical measure of performance. Investors use it to assess profitability, compare companies, and make investment decisions .
Get this wrong, and your financial statements will be misleading. Investors may make poor decisions based on incorrect information. Regulators may impose penalties for non-compliance. Get it right, and you provide a clear, transparent picture of your company’s performance, building trust with investors and stakeholders. This guide breaks down everything: the definition of EPS, the calculation of basic EPS and diluted EPS, practical examples, and disclosure requirements under IAS 33. Let us get into it.
The Pain Points: Why Businesses Struggle with EPS Calculation
The Complexity of the Weighted Average Share Count
Calculating the weighted average number of ordinary shares is not as straightforward as it might seem. Shares are issued and bought back throughout the year. Each transaction changes the number of shares outstanding. The weighted average calculation reflects the fact that capital was available for different portions of the year .
For example, if a company issues shares mid-year, those shares are only included in the denominator for the remaining months. Determining the exact date of inclusion can be complex. Shares issued in exchange for cash are included when cash is receivable. Shares issued as consideration in a business combination are included from the acquisition date . Getting these dates wrong directly impacts the EPS figure. Many businesses make errors in calculating the time-weighting factor, leading to incorrect EPS figures and potential restatements.
The Treatment of Preference Shares
Preference shares pose a challenge for EPS calculations. The key question is whether the preference shares are classified as equity or as a financial liability under IAS 32 . If they are equity-classified, the preference dividend is an appropriation of profit and must be deducted from earnings before calculating EPS. If they are liability-classified, the dividend is already a finance cost in profit or loss, so no adjustment is needed . Misclassifying preference shares can significantly distort EPS. This is a common area of error, particularly for companies with complex financing structures.
The Diluted EPS Calculation
Diluted EPS is more complex than basic EPS. It requires considering all potential ordinary shares that could dilute earnings in the future. These include convertible bonds, convertible preference shares, options, and warrants . Each instrument has its own impact on earnings and the share count. The order of inclusion matters because some instruments are more dilutive than others. In the IFRS illustrative example, convertible preference shares were antidilutive and therefore excluded from the diluted EPS calculation . Many businesses struggle with the ranking of dilutive instruments and the calculation of the incremental shares.
The Options and Warrants Problem
Options and warrants present a unique challenge. When options are exercised, the company receives cash. That cash could be invested to generate earnings. IAS 33 solves this problem by assuming that the cash received from the exercise is used to buy back shares at the average market price. Only the free shares are considered dilutive . This is a common area of difficulty for students and practitioners. The treasury share method requires careful calculation of the cash proceeds, the number of shares that could be bought at market price, and the incremental shares.
The Effect of Bonus Issues and Rights Issues
Bonus issues, share splits, and rights issues change the number of shares outstanding without a corresponding change in resources. These events require retrospective adjustment of the weighted average number of shares for all periods presented . For rights issues, a bonus factor must be calculated to adjust the shares before the rights issue . This is a common area of error. Many businesses fail to adjust prior period EPS figures, leading to inconsistencies in financial statements.
The Cost of Getting It Wrong
A company in Lagos incorrectly calculated its diluted EPS by failing to include convertible bonds. The error was identified during an audit. The company had to restate its financial statements. The restatement caused a drop in the share price and damaged investor confidence. The cost of getting it wrong was significant. Another company in Abuja correctly applied IAS 33, providing transparent EPS figures that helped attract investment. The difference was clear. Getting it right pays off in investor confidence and regulatory compliance.
What Is Earnings Per Share?
Definition
Earnings per share is the amount of profit attributable to each ordinary share outstanding. It is calculated by dividing earnings available to ordinary shareholders by the weighted average number of ordinary shares outstanding during the period . EPS is a measure of a company’s profitability from the perspective of the ordinary shareholder.
Scope of IAS 33
IAS 33 applies to entities whose ordinary shares or potential ordinary shares are publicly traded. Non-public entities that elect to present EPS must also follow the Standard . The Standard applies to both consolidated financial statements and separate or individual financial statements . The Standard applies to all entities that present EPS, including those that are not publicly traded but choose to disclose EPS.
Presentation Requirements
An entity must present basic EPS and diluted EPS with equal prominence in the statement of comprehensive income . In consolidated financial statements, EPS measures are based on the consolidated profit or loss attributable to ordinary equity holders of the parent . When the entity also discloses profit or loss from continuing operations, basic and diluted EPS must be presented in respect of continuing operations. If an entity reports a discontinued operation, it must present basic and diluted amounts per share for the discontinued operation either in the statement of comprehensive income or in the notes .
Importance of EPS to Investors
EPS is one of the most widely used financial metrics. Investors use EPS to assess a company’s profitability and growth prospects. It is used in calculating the price-to-earnings (P/E) ratio, a key valuation metric. EPS is also used to compare companies within the same industry. Companies with higher EPS are generally considered more profitable and attractive to investors. By standardising the calculation, IAS 33 ensures EPS is comparable between companies and over time .
Basic Earnings Per Share
The Formula
Basic EPS is calculated as :
Basic EPS = (Profit or Loss Attributable to Ordinary Equity Holders) ÷ (Weighted Average Number of Ordinary Shares Outstanding)
The formula is simple in theory but complex in practice. Each component requires careful analysis and calculation.
The Numerator: Earnings
The starting point for every EPS calculation is earnings attributable to ordinary shareholders. This is profit or loss after tax, adjusted for the after-tax amounts of preference dividends and any other adjustments . For a single entity with no preference shares, the earnings figure is simply profit after tax . If the entity has equity-classified preference shares, the preference dividends are deducted. If the preference shares are liability-classified, the dividends are already in finance costs, so no adjustment is needed .
For a group, the earnings figure must also exclude the portion of profit attributable to non-controlling interests. EPS is based on profit attributable to the parent’s ordinary shareholders only . This is a critical distinction. The non-controlling interest’s share of profit is not available to ordinary shareholders of the parent.
Practical Tip: Identify the share class correctly. Preference shares classified as a liability are already in finance costs. Preference shares classified as equity require a deduction from earnings . This distinction is often overlooked, leading to incorrect EPS figures.
The Denominator: Weighted Average Number of Ordinary Shares
The weighted average number of ordinary shares outstanding during the period reflects the possibility that the amount of shareholders’ capital varied during the period as a result of a larger or smaller number of shares being outstanding at any time . The weighted average is calculated by adjusting the number of shares at the beginning of the period by the number of shares bought back or issued during the period, multiplied by a time-weighting factor .
Time-Weighting Factor: The time-weighting factor is the number of days that the shares are outstanding as a proportion of the total number of days in the period. A reasonable approximation of the weighted average is adequate in many circumstances .
Example 1: Simple Weighted Average Calculation
A company has the following shares outstanding during the year:
| Date | Shares Issued | Treasury Shares | Shares Outstanding |
|---|---|---|---|
| 1 January | 2,000 | 300 | 1,700 |
| 31 May | +800 | – | 2,500 |
| 1 December | – | +250 | 2,250 |
The weighted average is calculated as:
(1,700 × 5/12) + (2,500 × 6/12) + (2,250 × 1/12) = 2,146 shares
Or alternatively:
(1,700 × 12/12) + (800 × 7/12) – (250 × 1/12) = 2,146 shares
Treasury Shares: Treasury shares are equity instruments reacquired and held by the issuing entity itself or by its subsidiaries. They are not treated as outstanding for the weighted average number calculation . This means that treasury shares reduce the denominator and increase EPS.
Inclusion Dates: Shares are usually included in the weighted average from the date consideration is receivable. For shares issued in exchange for cash, this is when cash is receivable. For shares issued in a business combination, this is from the acquisition date. For shares issued on conversion of debt, this is from the date that interest ceases to accrue . The exact date of inclusion is critical for accurate EPS calculation.
Example 2: Basic EPS with Preference Shares
Arsenal Plc has 1 million ordinary shares in issue throughout the year. Profit after tax is N45,000,000.
Case (a): No preference shares
Basic EPS = N45,000,000 ÷ 1,000,000 = N45.00 per share
Case (b)(i): 8% preference share capital of N120,000,000, classified as equity
Preference dividend = N120,000,000 × 8% = N9,600,000
Earnings available to ordinary shareholders = N45,000,000 – N9,600,000 = N35,400,000
Basic EPS = N35,400,000 ÷ 1,000,000 = N35.40 per share
Case (b)(ii): Same preference share capital, classified as financial liability
No dividend adjustment because the distribution is already recognised as a finance cost in profit or loss .
Basic EPS = N45,000,000 ÷ 1,000,000 = N45.00 per share
Diluted Earnings Per Share
Definition
Diluted EPS shows the impact of all dilutive potential ordinary shares on earnings per share . Potential ordinary shares are financial instruments that could be converted into ordinary shares in the future. These include convertible bonds, convertible preference shares, options, and warrants . Dilution is a potential reduction in EPS or a potential increase in loss per share resulting from the assumption that convertible instruments are converted, options or warrants are exercised, or ordinary shares are issued upon the satisfaction of specified conditions .
The Formula
Diluted EPS is calculated by adjusting both the profit or loss and the weighted average number of ordinary shares outstanding for the impact of all dilutive potential ordinary shares .
Adjustments to Earnings
The profit or loss used to determine basic EPS is adjusted by the after-tax effects of dividends, interest, or other changes in income or expense that would arise from the dilutive potential shares that would not arise if the dilutive potential shares were ordinary shares .
For Convertible Bonds: The after-tax interest expense (and any amortisation of discount or premium) is added back to earnings . In the IFRS example, the increase in earnings is CU3,000,000 (CU100,000,000 × 5% × (1 – 40%)) .
For Convertible Preference Shares: The after-tax preference dividends are added back to earnings .
For Options and Warrants: No adjustment is made to earnings because the cash received on exercise is assumed to be used to buy back shares at market price .
Adjustments to the Denominator
The weighted average number of shares used to calculate basic EPS is increased by the weighted average number of shares that would be issued if all dilutive potential shares were converted into ordinary shares .
For Convertible Bonds: The number of shares that would be issued on conversion is added .
For Convertible Preference Shares: The number of shares that would be issued on conversion is added .
For Options and Warrants: The number of shares that would be issued is calculated using the treasury share method .
The Treasury Share Method for Options and Warrants
The treasury share method assumes that the proceeds from the exercise of options or warrants are used to purchase ordinary shares at the average market price . The difference between the number of shares issued on exercise and the number that could be purchased at the average market price is the number of incremental shares added to the denominator .
Example 3: Options
Company J has earnings of N25,000,000 and 5,000,000 ordinary shares. It has options on 400,000 shares with an exercise price of N25. The average market price is N40.
Step 1: Calculate cash proceeds:
400,000 × N25 = N10,000,000
Step 2: Calculate shares that could be bought at market price:
N10,000,000 ÷ N40 = 250,000 shares
Step 3: Calculate shares issued on exercise:
400,000 shares
Step 4: Calculate incremental shares:
400,000 – 250,000 = 150,000 shares
Step 5: Calculate diluted EPS:
Diluted EPS = N25,000,000 ÷ (5,000,000 + 150,000) = N25,000,000 ÷ 5,150,000 = N4.85 per share
Note: Options are only included in the diluted EPS calculation if they are “in the money” (the average market price is greater than the exercise price). Out-of-the-money options are not dilutive .
Ranking Dilutive Instruments
When there are several types of potential ordinary shares, they should be ranked in order of dilution, with the most dilutive potential ordinary shares ranked first . In the IFRS illustrative example, the order of inclusion was options first (EPS impact 4.95), then 5% convertible bonds (EPS impact 3.23), and finally convertible preference shares (EPS impact 3.45). The convertible preference shares were antidilutive and therefore excluded . Ranking is essential to ensure that the most dilutive instruments are included first and that the diluted EPS is not overstated.
Anti-Dilution
Potential ordinary shares are only included in the diluted EPS calculation if they are dilutive . They are dilutive if their inclusion decreases EPS from continuing operations. If their inclusion increases EPS, they are anti-dilutive and are ignored . In the IFRS example, the convertible preference shares were anti-dilutive because their inclusion increased EPS from CU3.23 to CU3.45 . This is a critical concept. Including anti-dilutive shares would misrepresent the potential dilution and provide misleading information to investors.
Share Reorganisations
Bonus Issues and Share Splits
A bonus issue or share split increases the number of shares outstanding without a corresponding change in resources . The weighted average number of ordinary shares for all periods presented is adjusted retrospectively . This ensures that the EPS figures are comparable across periods.
Example 4: Bonus Issue
A company has 200 ordinary shares outstanding until 30 September 20X1. On 1 October 20X1, it makes a bonus issue of 2 ordinary shares for each share outstanding, issuing 400 new shares. Profit for 20X1 is CU600. Profit for 20X0 was CU180.
20X1 Basic EPS: CU600 ÷ (200 + 400) = CU1.00
20X0 Basic EPS: CU180 ÷ (200 + 400) = CU0.30
The bonus issue is treated as if it had occurred before the beginning of 20X0, the earliest period presented . This retrospective adjustment ensures that the EPS figures are comparable.
Rights Issues
A rights issue is an issue of shares to existing shareholders at a price below the current market price. It contains a bonus element . The weighted average number of shares before the rights issue must be adjusted by the bonus factor.
The bonus factor is calculated as:
Fair value per share immediately before the exercise of rights ÷ Theoretical ex-rights fair value per share
The theoretical ex-rights value is calculated by adding the aggregate fair value of the shares immediately before the exercise of the rights to the proceeds from the exercise of the rights, and dividing by the number of shares outstanding after the exercise of the rights . This calculation ensures that the EPS figures are not distorted by the bonus element of the rights issue.
Disclosure Requirements
IAS 33 requires entities to disclose :
The amounts used as the numerators in calculating basic and diluted EPS, and a reconciliation of those amounts to profit or loss.
The weighted average number of ordinary shares used as the denominator in calculating basic and diluted EPS, and a reconciliation of these denominators to each other.
A description of any other instruments (including contingently issuable shares) that could potentially dilute basic EPS in the future, but that were not included in the calculation of diluted EPS.
A description of ordinary share transactions that occur after the reporting period and that could have changed the EPS calculations significantly if those transactions had occurred before the end of the reporting period.
Presentation
Basic and diluted EPS and basic and diluted EPS relating to continuing operations shall be presented in the statement of comprehensive income . Basic and diluted EPS related to discontinued operations may be presented either in the statement of comprehensive income or in the notes . The presentation must be clear and prominent to ensure that investors can easily identify the EPS figures.
How Qeeva Advisory Helps You Navigate Earnings Per Share
We understand that EPS calculation can be complex. Many businesses struggle with the weighted average calculation, the treatment of preference shares, and the diluted EPS computation. Our professionals specialise in financial reporting, auditing, and advisory services.
Our Advisory Services Nigeria help you understand the complexities of EPS calculation. We assist with the calculation of basic and diluted EPS, the treatment of potential ordinary shares, and the disclosure requirements under IAS 33.
Our Financial Advisory services help you structure your share capital and financial instruments to achieve your financing and reporting objectives.
Our Bookkeeping Services ensure your financial records are accurate and complete, supporting your EPS calculations and financial reporting.
And because financial reporting is about compliance and stakeholder trust, our Regulatory Compliance services ensure your business meets all filing requirements and stays in good standing with regulatory authorities.
Our Tax Strategies and Planning services help you understand the tax implications of your share capital structure.
Our Service Methodology
We do not do generic. We do thorough, transparent, and actionable.
Step 1: EPS Calculation Review
We review your current EPS calculations, including the weighted average share count, the treatment of preference shares, and the impact of potential ordinary shares. We identify gaps, risks, and opportunities for improvement. This step draws on our Advisory Services Nigeria expertise.
Step 2: Share Capital Analysis
We analyse your share capital structure, including ordinary shares, preference shares, and potential ordinary shares. We help you classify instruments correctly under IAS 32 and IAS 33.
Step 3: Diluted EPS Calculation
We help you calculate diluted EPS, including the impact of convertible bonds, convertible preference shares, options, and warrants. We ensure that dilutive instruments are properly ranked and that anti-dilutive instruments are excluded.
Step 4: Disclosure Review
We review your EPS disclosures to ensure compliance with IAS 33. We help you prepare the required reconciliations and descriptions.
Step 5: Ongoing Monitoring and Support
EPS calculation is not a one-time exercise. We help you monitor changes in your share capital, update your calculations, and stay current with regulatory developments. We provide ongoing support through our Advisory Services Nigeria and Regulatory Compliance services.
Frequently Asked Questions
Q: What is the difference between basic EPS and diluted EPS?
A: Basic EPS is calculated using the actual number of ordinary shares outstanding. Diluted EPS considers the impact of all potential ordinary shares that could dilute earnings in the future, such as convertible bonds, options, and warrants .
Q: How is the weighted average number of shares calculated?
A: The weighted average is calculated by adjusting the number of shares at the beginning of the period by the number of shares bought back or issued during the period, multiplied by a time-weighting factor .
Q: How are preference shares treated in EPS calculations?
A: If preference shares are classified as equity, the preference dividend is deducted from earnings before calculating EPS. If they are classified as a financial liability, the dividend is already in finance costs, so no adjustment is needed .
Q: How are options and warrants treated in diluted EPS?
A: The treasury share method is used. The cash received from exercise is assumed to be used to buy back shares at the average market price. Only the free shares are considered dilutive .
Q: What is the order of inclusion for dilutive instruments?
A: Dilutive instruments should be ranked in order of dilution, with the most dilutive ranked first. Instruments that are anti-dilutive are excluded .
Q: How are bonus issues and share splits treated?
A: The weighted average number of shares for all periods presented is adjusted retrospectively .
Q: What disclosures are required under IAS 33?
A: Entities must disclose the numerators and denominators used in EPS calculations, a reconciliation of those amounts, a description of potential ordinary shares that were not included, and a description of post-reporting date share transactions .
Q: How can Qeeva Advisory help with EPS calculation?
A: We provide EPS calculation review, share capital analysis, diluted EPS calculation, disclosure review, and ongoing monitoring to help businesses navigate EPS under IAS 33.
The Bottom Line
Earnings per share is a critical metric in financial reporting. It tells investors how much profit a company has generated for each ordinary share outstanding. Understanding how to calculate basic EPS and diluted EPS is essential for accurate financial reporting and informed investment decisions.
The key is to understand the components. Basic EPS is calculated by dividing earnings available to ordinary shareholders by the weighted average number of ordinary shares outstanding . Diluted EPS considers the impact of all dilutive potential ordinary shares . The weighted average share count must be adjusted for share issues, buybacks, bonus issues, and rights issues . The treatment of preference shares depends on their classification under IAS 32 . Options and warrants are treated using the treasury share method . Dilutive instruments are ranked in order of dilution, and anti-dilutive instruments are excluded .
Your job is to be prepared. Understand the components of EPS. Calculate the weighted average share count correctly. Treat preference shares appropriately. Calculate diluted EPS correctly. Disclose the required information. Seek professional guidance.
With the right approach and the right partner, you can turn EPS from a compliance burden into a clear, transparent measure of performance that builds trust with investors and stakeholders.
The choice is yours.
Suggested Reading from Our Blog
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Data-Driven Decision Making in Organizations – Understand how data supports financial analysis and decision-making.
Related Services
Our Advisory Services Nigeria are staffed by professionals specialising in financial reporting, auditing, and advisory services.
Our Financial Advisory services help you structure your share capital and financial instruments.
Our Bookkeeping Services ensure your financial records are accurate and complete.
Our Regulatory Compliance services ensure your business meets all filing requirements and stays in good standing.
Our Tax Strategies and Planning services help you understand the tax implications of your share capital structure.
Let’s Talk About Your EPS Calculation
Navigating EPS calculation can feel complex. At Qeeva Advisory, we understand the challenges businesses face in calculating basic and diluted EPS under IAS 33.
Whether you need help with the weighted average share count, the treatment of preference shares, the calculation of diluted EPS, or the disclosure requirements, we are here to support you.
📞 Call us: (+234) 802 320 0801, (+234) 807 576 5799
📧 Email: info@qeeva.com
📍 Visit us: 5, Ishola Bello Close, Off Iyalla Street, Alausa, Ikeja, Lagos, Nigeria
Contact us today to schedule a consultation. Let us help you navigate EPS calculation with confidence.
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Reference Links / Sources
IFRS Foundation – IAS 33 Earnings per Share (Overview)
IFRS Foundation – IAS 33 Earnings per Share (Illustrative Examples)
IFRS Foundation – IAS 33 Earnings per Share (Full Standard)
ICAN – Financial Reporting Study Text (2025)
Moore Global – IAS 33 Earnings Per Share
