Bonus Issue vs Stock Split: Same Effect, Different Mechanics
TL;DR
- A bonus issue gives existing shareholders additional shares free of cost, funded from the company's free reserves; the face value of each share remains unchanged.
- A stock split divides each existing share into multiple shares of lower face value; no money is moved out of reserves.
- Both actions increase the number of shares you own and proportionally reduce the market price, leaving total value unchanged on the ex-date.
- For tax purposes, the cost basis is adjusted differently: bonus shares get zero cost under FIFO, while split shares inherit a proportionally reduced cost.
- Both bonus and split require approval under Section 63 of the Companies Act, 2013, and SEBI ICDR Regulations, and the record date determines who is eligible.
What this means in plain terms
If a company announces a 1:1 bonus, you get one free share for every share you hold. If a company announces a 1:2 split, your one share becomes two shares. In both cases your portfolio is worth the same the next day; the price just adjusts proportionally so nothing magical happens to your wealth.
Companies use these tools mainly for two reasons: to bring the share price down to a level retail investors find affordable, and to send a positive signal of confidence in future earnings. The mechanics differ on a balance sheet, but for a retail holder the visible effect is similar.
Mechanics of a bonus issue
How the company funds it
Bonus shares are issued from the company's free reserves, securities premium account, or capital redemption reserve. The company moves money from these accounts to the paid-up share capital account. No cash leaves the company.
Face value stays the same
If a stock has Rs. 10 face value and the company announces a 1:1 bonus, you now have two shares of Rs. 10 face value each instead of one. The total paid-up capital doubles, with reserves reducing by the same amount.
Record date and ex-date
The record date is the cut-off; if you are on the shareholder register on that date, you get the bonus. The ex-bonus date, usually the same as the record date in the new T+1 system, is when the share starts trading at the adjusted price.
Regulatory framework
Bonus issues are governed by Section 63 of the Companies Act, 2013, and SEBI's ICDR Regulations (Chapter IX). They must be implemented within 15 working days of board approval if shareholders have already approved them; otherwise within two months of approval.
Mechanics of a stock split
How the company executes it
The company simply reduces the face value of each share. A 1:5 split on a Rs. 10 face value share creates five Rs. 2 face value shares. Reserves and paid-up capital do not change in absolute terms.
Share count multiplies
If you held 100 shares of Rs. 10 face value before the split, after a 1:5 split you hold 500 shares of Rs. 2 face value. The market price drops proportionally on the ex-date.
Why companies do splits
The main reason is liquidity and accessibility. A Rs. 5,000 share is harder for retail investors to buy in lots, so a 1:5 split bringing it to Rs. 1,000 makes the stock more tradable. There is no balance sheet upside, only psychological and liquidity benefit.
SEBI approval and disclosure
Stock splits require shareholder approval via special resolution under the Companies Act and must be disclosed to stock exchanges under the SEBI LODR Regulations within 30 minutes of board approval.
Tax treatment
Cost basis for bonus shares
Bonus shares are treated as acquired at zero cost as per Section 55(2)(aa)(iiia) of the Income-tax Act when they are sold. The holding period starts from the date of allotment, not from the date you bought the original shares.
Cost basis for split shares
In a stock split, the original cost is proportionally divided. If you bought 100 shares at Rs. 1,000 each (total Rs. 1,00,000), and a 1:5 split happens, you now have 500 shares at Rs. 200 cost each. The holding period continues from the original purchase date.
LTCG vs STCG implications
For bonus shares sold within 12 months of allotment, gains are short-term and taxed at 20 percent under Section 111A. For split shares, the original purchase date governs, so the holding period carries over for capital gains classification.
FIFO and identification rules
Under Section 45 read with Rule 11UA, the FIFO method is used to identify which shares are sold. If you sell only some of your holding, the income tax department assumes the oldest acquired shares are sold first, which affects whether bonus or original-basis shares are deemed transferred.
Practical investor implications
Liquidity and visibility
Both actions tend to increase trading volumes in the weeks after the corporate action, as more retail investors find the lower per-share price approachable. Big-name examples in recent years include 1:1 bonuses by IRCTC and 1:5 splits by MRF discussions.
Index inclusion impact
Free-float market cap weights in Nifty and Sensex are unaffected by bonuses or splits since the total market cap stays the same. However, intra-index weights shift slightly due to price discovery in subsequent sessions.
Dividend payout
Future dividends are paid per share, so if a company kept the dividend per share constant, your total dividend doubles after a 1:1 bonus. In practice, most companies adjust the dividend per share so total payout remains the same.
A real example
Pooja, 41, Rs. 35L CTC, Bengaluru, holds 200 shares of a mid-cap auto component company bought in June 2023 at Rs. 800 per share. Total investment Rs. 1,60,000. In November 2025 the company announces a 1:1 bonus with a December 15 record date.
Here is what happens:
- After the bonus, she holds 400 shares.
- The market price adjusts from say Rs. 1,200 to Rs. 600 on the ex-date.
- Her portfolio value remains 400 x Rs. 600 = Rs. 2,40,000, the same as 200 x Rs. 1,200 before.
- For tax purposes, 200 original shares retain cost of Rs. 800 each; 200 bonus shares have zero cost basis.
- In May 2026, she sells all 400 shares at Rs. 700 each, for Rs. 2,80,000.
- Original shares: gain = 200 x (Rs. 700 minus Rs. 800) = minus Rs. 20,000 (LTCG loss since held over 12 months).
- Bonus shares: gain = 200 x (Rs. 700 minus Rs. 0) = Rs. 1,40,000, but holding period from December 2025 to May 2026 is less than 12 months, so STCG.
- STCG tax under Section 111A: 20 percent x Rs. 1,40,000 = Rs. 28,000, partially offset by LTCG loss carry-forward rules.
The bonus issue did not create wealth, but it did create tax complexity that requires careful FIFO tracking.
What to do this week
- Pull your demat holdings statement and identify any stocks that have had bonus issues or splits since you bought them; check the cost adjustments in your broker's tax P&L.
- For bonus shares allotted in the last 12 months, avoid selling them before completion of 12 months unless you are comfortable with short-term capital gains tax.
- Compare your broker's tax P&L with the AIS (Annual Information Statement) on the income tax portal to ensure cost basis reporting matches.
- When a company announces a bonus or split, note the record date and ensure your shares are credited in demat before that date.
- Run the 6-step assessment at https://myfinancial.in to see your old-vs-new regime delta, unused deductions, and insurance gap in under 10 minutes.
FAQ
Do I have to pay tax when bonus shares are credited?
No. Bonus shares are not taxable at allotment. Tax arises only when you sell them, computed on the full sale value since cost basis is zero under Section 55(2)(aa)(iiia).
Can I refuse a bonus issue?
No, bonus shares are credited automatically to all eligible shareholders. There is no refusal mechanism, unlike a rights issue where you can choose to subscribe or not.
Is a 1:1 bonus the same as a 1:2 stock split?
The share count effect is identical (you end up with double the shares), but the balance sheet impact differs. A 1:1 bonus reduces reserves; a 1:2 split reduces face value. Tax cost basis treatment also differs.
Do ADRs and GDRs adjust for bonus and splits?
Yes. Indian ADRs and GDRs adjust their ratios so that the underlying value stays consistent for foreign holders. The adjustment is automatic.
Will my SIP or systematic investment in the stock pause?
No. Bonus and split do not affect ongoing purchases. Your future buys happen at the adjusted price post the corporate action.
Does the company need shareholder approval for both?
Yes. Both bonus and split require board approval and a shareholder special resolution under the Companies Act, 2013, alongside SEBI disclosures.
Are bonus shares the same as stock dividends?
Conceptually yes; both transfer reserves into equity without cash leaving. Indian regulation specifically uses the term bonus issue and treats it under Section 63 of the Companies Act.
Sources
- https://www.sebi.gov.in/legal/regulations/sep-2018/securities-and-exchange-board-of-india-issue-of-capital-and-disclosure-requirements-regulations-2018_40328.html
- https://www.incometax.gov.in/iec/foportal/help/individual/return-applicable-1
- https://www.mca.gov.in/content/mca/global/en/acts-rules/ebooks/acts.html
- https://www.nseindia.com/companies-listing/corporate-filings-actions
- https://www.bseindia.com/corporates/corporate_act.aspx
This is general information, not personalised advice. For your situation, consult a Certified Financial Planner.
