Bonus Share Adjustment Calculator

Numbers only

Numbers only

Bonus Price Adjustment – Complete Guide to Share Price After Bonus Issue

Understand how bonus issue affect share prices. Learn the exact formula, see real examples, and discover why companies issue bonus shares – all in one simple guide.

What Is a Bonus Issue?

A bonus issue (also called a scrip issue or capitalization issue) occurs when a company distributes additional free shares to existing shareholders in proportion to their holdings. For example, a 1:1 bonus means you receive one extra share for every share you already own.

While the number of shares increases, the company’s total market capitalization remains unchanged. Therefore, the share price adjusts downward to reflect the larger number of shares outstanding.

The Bonus Price Adjustment Formula

The adjusted price after a bonus issue is based on market capitalization conservation:

Adjusted Price = Old Price ÷ (1 + Bonus Percentage / 100)

For instance, a 1:2 bonus (1 bonus share for every 2 held) equals a 50% bonus. If the old price is ₹1,200, the adjusted price becomes ₹1,200 / 1.5 = ₹800.

How to Calculate Adjusted Price – Step by Step

  • Step 1: Find the bonus percentage – e.g., a 2:5 bonus = 40%.
  • Step 2: Note the current share price – e.g., ₹500.
  • Step 3: Apply formula: ₹500 / (1 + 0.40) = ₹500 / 1.40 = ₹357.14.

If you held 100 shares before the bonus, you receive 40 bonus shares (total 140 shares). Your total investment value remains the same: 100 × ₹500 = ₹50,000 before; 140 × ₹357.14 ≈ ₹50,000 after.

Why Do Companies Issue Bonus Shares?

✓ Improve Liquidity – More shares available for trading.
✓ Affordable Price – Lower per‑share price attracts retail investors.
✓ Signal Confidence – Shows strong retained earnings and future prospects.
✓ No Cash Outflow – Rewards shareholders without spending cash.

Bonus vs. Stock Split – What’s the Difference?

Many investors confuse bonus issues with stock splits. Here’s a quick comparison:

AspectBonus IssueStock Split
Accounting EntryReserves converted to share capitalNo change – only par value adjusted
Total Shareholder ValueUnchangedUnchanged
ReasonCapitalize retained earningsMake price more accessible

Common Questions About Bonus Adjustments

1. Does the total value of my investment change after a bonus?

No. Immediately after the bonus, the total value stays the same because the share price adjusts proportionally. Future price movements determine actual gains or losses.

2. When does the price adjustment happen?

On the ex‑bonus date. If you buy shares on or after that date, you are not entitled to the bonus shares, and the price already reflects the adjustment.

3. Can a bonus issue be in fractions?

Generally, bonus shares are issued in whole numbers. Any fractional entitlement is usually settled in cash or rounded down.

4. Is a bonus issue good or bad for investors?

It is generally positive for liquidity and may indicate a healthy company, but it does not add immediate value. Over time, if the company performs well, the price may rise from the adjusted level.

Why Use a Bonus Price Adjustment Guide?

  • Estimate the corrected share price accurately.
  • Understand the impact of bonus announcements on your portfolio.
  • Make informed investment decisions based on post-bonus valuations.

Key Points

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Disclaimer: This article is for informational purposes only. Bonus rules and tax treatments may vary. Always consult official sources or a financial advisor before making investment decisions.