What Is a Share Buyback? Meaning, Tender Offer, Acceptance Ratio and Tax

What Is a Share Buyback?

Simple Meaning

Suppose a company has 10 crore equity shares outstanding.

It buys back and extinguishes 50 lakh shares.

After completion:

• shares outstanding reduce to 9.5 crore;
• successful participating shareholders receive cash;
• accepted shares cease to exist;
• non-participating shareholders continue to hold their shares;
• each remaining share represents a slightly larger fraction of the company than before, assuming no other issuance.

A buyback is not free money. A shareholder gives up accepted shares in exchange for cash.

Legal Foundation in India

Section 68 of the Companies Act, 2013 permits a company to purchase its own shares or specified securities from permitted sources such as free reserves, the securities-premium account or eligible issue proceeds, subject to legal conditions.

The provision also requires safeguards relating to:

• authorisation;
• approval limits;
• solvency;
• debt and capital position;
• fully paid securities;
• completion timetable;
• extinguishment;
• filing and record keeping.

Listed-company buybacks must also comply with the current SEBI Buy-Back Regulations.

Why Do Companies Buy Back Shares?

A company may announce a buyback for several reasons.

Return Surplus Cash

A mature company may have more cash than it can deploy productively in the near term.

A buyback can return part of that cash to shareholders who choose to participate.

Improve Capital Efficiency

A company with excess equity and low leverage may use a buyback to change its capital structure.

Possible effects include:

• lower share count;
• higher earnings per share if earnings remain unchanged;
• higher return-on-equity measures because equity reduces;
• altered cash and debt ratios.

A stronger ratio after buyback does not always mean the operating business improved.

Signal That Management Believes Shares Are Undervalued

Management may believe the market price is below the company’s long-term value.

The signal is more credible when:

• the balance sheet remains strong;
• the buyback does not weaken necessary investment;
• management explains valuation and capital-allocation logic;
• promoters and insiders act consistently with the stated rationale.

Offset Employee Share Issuance

Companies may issue shares through employee stock-option or compensation programmes.

A buyback can partly offset dilution from those issuances.

Increase the Ownership Percentage of Remaining Shareholders

When accepted shares are extinguished, shareholders who do not sell may own a larger percentage of the reduced share capital.

This percentage increase occurs without those investors purchasing additional shares.

Provide an Exit at an Announced Price

A tender offer can provide eligible shareholders an opportunity to sell accepted shares at the announced buyback price.

The actual benefit depends on:

• acceptance ratio;
• market price;
• tax;
• transaction costs;
• future performance of shares retained.

Methods of Share Buyback in India

Current SEBI rules recognise more than one buyback route.

Tender Offer Route

A tender offer is an offer to purchase shares from eligible holders on a proportionate basis through a Letter of Offer.

The tender route normally involves:

• board or shareholder approval;
• public announcement;
• record date;
• shareholder categories;
• Letter of Offer;
• tendering through the stock-exchange mechanism;
• proportionate acceptance;
• payment;
• return or release of unaccepted shares;
• extinguishment of accepted shares.

Tender offers are especially relevant to individual investors because they include a separate reserved category for eligible small shareholders.

Open-Market Buyback Through Stock Exchange

SEBI reintroduced open-market buybacks through stock exchanges from August 1, 2026 under the amended regulations.

Under the reintroduced framework:

• the company purchases shares through the stock exchange;
• the route operates differently from a record-date tender offer;
• promoter and associated holdings are restricted or frozen according to the framework;
• the offer must be completed within the prescribed period;
• utilisation and disclosure requirements apply.

SEBI’s 2026 framework provides a maximum completion period of 66 working days from the opening of the buyback and requires at least 40% of earmarked funds to be used during the first half of the offer period.

Open-Market Buyback Through Book Building

The regulations also recognise an open-market book-building route.

The company specifies the route in its public announcement and regulatory documents.

How a Tender Buyback Works

1. Approval

The company’s board approves the proposal.

A buyback within the applicable board-approval limit may not require a shareholder special resolution. A larger proposal requires shareholder approval according to the Companies Act and SEBI rules.

2. Public Announcement

The company discloses key information such as:

• buyback size;
• number of shares;
• buyback price;
• route;
• maximum offer amount;
• purpose;
• funding source;
• approvals;
• process and timetable;
• expected impact on shareholding.

3. Record Date

The record date identifies shareholders eligible to participate in a tender offer.

The market value of the holding on the record date is also relevant for small-shareholder classification.

4. Letter of Offer and Tender Form

The Letter of Offer contains the detailed terms.

It normally explains:

• eligibility;
• category;
• indicative entitlement;
• offer dates;
• tender procedure;
• documents;
• settlement;
• tax considerations;
• risk factors.

5. Tender Through a Broker

A demat shareholder normally submits the tender instruction through a stock broker during the offer period.

The broker places the bid on the exchange tender platform.

Tendering shares is not the same as selling them immediately. Final acceptance is determined after the offer closes.

6. Proportionate Acceptance

Valid tenders are processed on a proportionate basis.

Shares tendered within entitlement receive priority under the applicable process. Additional tendered shares can also be accepted if capacity remains.

7. Payment and Return of Unaccepted Shares

The investor receives cash for accepted shares.

Unaccepted shares are returned or released back into the demat account according to the settlement process.

8. Extinguishment

The company cancels or extinguishes accepted shares.

The reduction in outstanding share count is a defining feature of a completed buyback.

Small Shareholder Category in a Tender Buyback

A small shareholder is a specific regulatory category.

Under the current framework, it generally refers to an eligible shareholder whose market value of shares in the company does not exceed ₹2,00,000 on the record date, calculated using the applicable exchange price methodology.

Fifteen Percent Reservation

Tender-offer rules reserve the higher of:

• 15% of the number of shares proposed to be bought back; or
• the number of shares to which small shareholders are entitled based on their shareholding.

This reservation creates a separate small-shareholder pool.

It does not guarantee 100% acceptance.

General Category

Eligible shareholders who do not meet the small-shareholder definition participate in the general category.

Each category has its own:

• total eligible holding;
• entitlement factor;
• valid tender pool;
• final acceptance.

Buyback Entitlement and Acceptance Ratio

These terms are related but different.

Buyback Entitlement

Buyback entitlement is the indicative number of shares that may receive priority, based on:

• shareholder category;
• record-date holding;
• total shares reserved for that category;
• total eligible shares held in that category;
• rounding rules.

FORMULA: Indicative entitlement shares = Record-date holding × Category entitlement percentage

The Letter of Offer may instead express entitlement as a ratio, such as 15 shares for every 100 shares held.

Shares Tendered

Shares tendered are the number of shares the investor submits into the offer.

The investor may tender:

• fewer than entitlement;
• exactly entitlement;
• more than entitlement;
• the full eligible holding.

Shares Accepted

Shares accepted are the number the company actually purchases.

Accepted shares can include:

• entitlement shares;
• additional shares accepted from the remaining tender pool.

Effective Acceptance Ratio

FORMULA: Effective acceptance ratio = Accepted shares ÷ Tendered shares × 100

Entitlement Is Not the Final Acceptance Ratio

An entitlement of 15 shares for every 100 held does not necessarily mean the final acceptance ratio will be 15%.

Final acceptance can be higher when:

• some eligible shareholders do not participate;
• some tender fewer shares;
• category capacity remains;
• additional shares are accepted proportionately.

It can also be affected by invalid tenders and rounding.

Worked Tender-Offer Example

Suppose an investor:

• holds 500 eligible shares on the record date;
• tenders all 500 shares;
• has category entitlement of 15 shares for every 100 held;
• uses an additional-acceptance scenario of 25%;
• buyback offer price is ₹1,600;
• reference market price is ₹1,400;
• average acquisition cost is ₹900.

Step 1: Calculate Entitlement

FORMULA: 500 × 15 ÷ 100 = 75 entitlement shares

Step 2: Calculate Shares Above Entitlement

FORMULA: 500 tendered − 75 entitlement = 425 additional shares tendered

Step 3: Estimate Additional Acceptance

FORMULA: 425 × 25% = 106.25

For a simple scenario estimate, use 106 additional shares.

Step 4: Estimate Total Accepted Shares

FORMULA: 75 + 106 = 181 accepted shares

Step 5: Calculate Effective Acceptance Ratio

FORMULA: 181 ÷ 500 × 100 = 36.20%

Step 6: Calculate Returned Shares

FORMULA: 500 − 181 = 319 shares returned or released

Step 7: Calculate Gross Proceeds

FORMULA: 181 × ₹1,600 = ₹2,89,600

Step 8: Calculate Premium Over Reference Price

FORMULA: (₹1,600 − ₹1,400) × 181 = ₹36,200

Measure	Result
Record-date holding	500 shares
Shares tendered	500 shares
Entitlement ratio	15 for every 100
Entitlement shares	75 shares
Additional-acceptance scenario	25%
Estimated additional accepted	106 shares
Estimated total accepted	181 shares
Estimated effective acceptance ratio	36.20%
Estimated returned shares	319 shares
Buyback price	₹1,600
Gross proceeds	₹2,89,600
Premium over ₹1,400 reference price	₹36,200

Tax on Share Buybacks in India

Buyback taxation changed more than once in recent years.

Current Framework From April 1, 2026

Under Section 69 of the Income-tax Act, 2025, consideration received by a shareholder when a company purchases its own shares or other specified securities is subject to the capital-gains framework. Broadly, the gain is determined by comparing the buyback consideration with the applicable cost of acquisition, subject to the other capital-gains provisions of the Act.

For an investor, the practical calculation therefore depends on the number of shares actually accepted, buyback consideration, acquisition cost, holding period and the capital-gains provisions applicable to that security and shareholder.

The Act also contains additional tax provisions for promoters in specified buyback cases. Promoters, non-residents and investors with unusual or high-value circumstances should verify the treatment applicable to their transaction rather than applying a general retail-shareholder example.

Why Older Articles May Show a Different Rule

From October 1, 2024 until the new framework took effect, domestic-company buyback consideration was generally treated as dividend income in the shareholder’s hands under the earlier rules, with separate treatment of acquisition cost.

That historical rule should not be copied into a current 2026 calculation without checking the transaction date.

Simple Capital-Gain Illustration

Assume:

• accepted shares: 100;
• buyback price: ₹1,500;
• acquisition cost: ₹900 per share.

FORMULA: Gross consideration = 100 × ₹1,500 = ₹1,50,000

FORMULA: Cost of acquisition = 100 × ₹900 = ₹90,000

FORMULA: Illustrative capital gain = ₹1,50,000 − ₹90,000 = ₹60,000

The final tax depends on the applicable capital-gains rules and the investor’s facts.

How a Buyback Affects the Company and Investors

Shares Outstanding Decrease

Accepted shares are extinguished.

The denominator used for per-share calculations becomes smaller.

Earnings Per Share May Increase

FORMULA: EPS = Profit attributable to equity shareholders ÷ Weighted average shares outstanding

If profit remains unchanged while the number of shares falls, EPS can rise.

This is a mathematical effect. It does not prove operating profit grew.

Cash and Net Worth Reduce

The company pays cash to shareholders.

This reduces cash resources and normally reduces equity or reserves according to the accounting treatment.

Debt Ratios Can Worsen

If cash and equity fall, leverage ratios may increase.

A company should not weaken financial stability merely to improve per-share metrics.

Ownership Percentage of Remaining Holders Can Rise

A non-participating shareholder’s number of shares stays the same while total shares outstanding fall.

The ownership percentage can therefore rise.

Market Price Can React in Either Direction

A buyback can be interpreted positively when:

• the company has genuine surplus cash;
• the price is sensible;
• the balance sheet remains strong;
• management has a disciplined capital-allocation record.

It can be viewed negatively when:

• growth investment is being sacrificed;
• the company overpays;
• debt increases;
• the action mainly supports short-term metrics;
• governance concerns arise.

Tender Buyback vs Open-Market Buyback

Point	Tender offer	Open-market buyback through stock exchange
Eligibility	Based on record date	Market sellers whose orders match company purchases
Buyback price	Fixed announced price	Market-linked purchases within permitted limits
Entitlement	Yes	No tender entitlement
Acceptance ratio	Relevant	Not used in the same way
Small-shareholder reservation	Yes	No comparable tender reservation
Investor action	Tender through broker	Sell normally in the market
Promoter participation	Subject to tender rules	Restricted under the amended framework
Completion period	Offer-specific regulated timetable	Prescribed open-market period
Primary Regal Ticker tool	Buyback Acceptance Ratio Calculator	Standard market-sale analysis

Share Buyback vs Other Corporate Actions

Buyback vs Dividend

A dividend distributes cash while the shareholder generally keeps all shares.

A buyback pays cash only for accepted shares surrendered to the company.

Read What Is a Dividend? for the dividend process.

Buyback vs Bonus Shares

A bonus issue increases share count without asking the shareholder to pay cash.

A buyback reduces outstanding share count by purchasing and extinguishing shares.

Read What Are Bonus Shares? for the bonus-share mechanics.

Buyback vs Rights Issue

A rights issue raises fresh capital by offering additional shares to eligible holders.

A buyback returns capital by purchasing existing shares.

Buyback vs Stock Split

A stock split increases the number of shares by subdividing each share and reducing face value.

A buyback reduces the number of outstanding shares by cancelling accepted shares.

Read What Is a Stock Split? for the split calculation.

Corporate action	Cash flow	Share count	Investor action
Dividend	Company pays cash	Usually unchanged	Hold through eligibility
Buyback	Company pays cash for accepted shares	Decreases	Tender, sell in market or continue holding
Bonus shares	No subscription payment	Increases	Normally automatic for eligible holders
Rights issue	Investor pays company	Increases after allotment	Subscribe, transfer or lapse
Stock split	No cash exchange	Increases	Normally automatic adjustment

How to Evaluate a Share Buyback

1. Understand the Purpose

Ask whether the company is:

• returning genuine surplus cash;
• improving an inefficient capital structure;
• offsetting dilution;
• supporting the share price;
• changing ownership dynamics;
• avoiding productive investment.

2. Compare Buyback Price With Business Value

The premium over market price is not enough.

Review:

• earnings quality;
• cash flow;
• balance sheet;
• debt;
• return ratios;
• growth opportunities;
• valuation;
• governance.

3. Check the Funding Source

A buyback funded from strong internal cash can be very different from one that leaves the company financially stretched.

4. Estimate Acceptance

Use:

• record-date holding;
• category;
• entitlement ratio;
• shares you plan to tender;
• several additional-acceptance scenarios.

5. Consider the Shares You Will Retain

If many tendered shares are returned, the investor remains exposed to the post-buyback market price.

6. Check Current Tax

Use the law applicable on the actual transaction date, not an old article or outdated calculator label.

7. Review Promoter Participation

Promoter participation or non-participation can affect:

• offer supply;
• acceptance;
• post-buyback ownership;
• governance interpretation.

Use the Regal Ticker Buyback Calculator

Use the Buyback Acceptance Ratio Calculator in this sequence:

Step 1: Verify the Route

Confirm whether the buyback is:

• tender offer;
• open market through stock exchange;
• open market through book building.

Step 2: Note the Dates

For a tender offer, record:

• record date;
• offer opening;
• offer closing;
• settlement date.

Step 3: Identify Your Category

Check whether you qualify as a small shareholder or general shareholder.

Step 4: Enter Your Entitlement

Use the Letter of Offer or registrar entitlement page.

Step 5: Model Multiple Acceptance Scenarios

Test conservative, moderate and optimistic additional-acceptance assumptions.

Step 6: Compare Gross Proceeds and Returned Shares

Do not evaluate only the accepted shares. The retained position matters too.

Step 7: Calculate Gain or Loss Separately

Use accepted quantity, buyback price, acquisition cost and current tax rules.

Buyback Calculation Workflow

• Verify whether the official buyback uses the tender-offer route.
• Confirm the record date and your eligible holding.
• Identify whether you fall under the small-shareholder or general category.
• Enter the entitlement ratio from the Letter of Offer or registrar communication.
• Enter the number of shares you plan to tender.
• Model conservative, moderate and optimistic additional-acceptance scenarios.
• Compare estimated accepted shares, returned shares and gross proceeds.
• After settlement, verify the actual acceptance and calculate tax separately under the rules applicable to the transaction.

Browse all Regal Ticker Investor Tools for related calculators.

Common Buyback Mistakes and Investor Checklist

Common Mistakes

• Assuming entitlement equals final acceptance.
• Assuming every tendered share will be bought.
• Ignoring the small-shareholder definition.
• Buying only for the announced premium.
• Using an outdated tax rule.
• Ignoring returned shares.
• Treating higher EPS as business growth.
• Ignoring the funding cost.
• Using only one optimistic acceptance scenario.
• Not reading the Letter of Offer.

Investor Checklist

Before tendering, check:

• What is the buyback route?
• What is the offer price?
• What is the current market price?
• What is the record date?
• What is my eligible holding?
• Am I in the small-shareholder or general category?
• What is my entitlement?
• How many shares will I tender?
• What acceptance scenarios have I modelled?
• What happens if most shares are returned?
• What is my acquisition cost?
• Which tax rules apply on the transaction date?
• How strong is the post-buyback balance sheet?
• Is the company overpaying?
• What will promoters do?
• Have I read the Letter of Offer?
• Am I acting on fundamentals or only on the announced premium?

Conclusion

A share buyback is a regulated purchase of a company’s own shares.

In a tender offer:

• the record date identifies eligible shareholders;
• shareholders tender through the prescribed mechanism;
• entitlement gives priority;
• additional shares may be accepted;
• accepted shares are purchased for cash;
• unaccepted shares return to the investor;
• accepted shares are extinguished.

The most important calculation is not the announced premium alone. It is the combination of:

• entitlement;
• possible additional acceptance;
• final accepted quantity;
• gross proceeds;
• retained shares;
• market risk;
• current tax.

Use the Regal Ticker Buyback Acceptance Ratio Calculator after reading the Letter of Offer. Model several acceptance scenarios and verify the current tax rules separately.