Bonus Share Adjusted Price Calculator NEPSEThe price after book closure, worked out.
Enter the last price before book closure and the announced bonus and right percentages. See the adjusted price NEPSE resets the share to, and what your holding is worth on either side of the date.
At Rs 500.00 before book closure, a 10% bonus resets the price to Rs 454.55, 9.09% lower. Your 100 shares become 110, worth Rs 50,000, the same as before. A bonus changes the number of shares, not what they are worth.
Before and after book closure
| Item | Before | After |
|---|---|---|
| Shares | 100 | 110 |
| Price per share | Rs 500.00 | Rs 454.55 |
| Holding value | Rs 50,000 | Rs 50,000 |
| Cash paid for rights | — | Rs 0 |
Uses the last price before book closure, as NEPSE does. Bonus only: P ÷ (1 + B). Right only: (P + S × R) ÷ (1 + R). Both together: (P + S × R) ÷ (1 + B + R), assuming both percentages apply to the same pre-closure holding. Share counts are exact ratios; companies settle fractions as their notice says. The 5% tax on bonus shares and cash dividends is not part of the price adjustment.
The formula NEPSE applies
When a listed company issues bonus or right shares, NEPSE adjusts the share price right after book closure to reflect the new shares, starting from the last traded price before the book closure date. ShareSansar's explainer gives the two formulas, and they are the ones this calculator uses:
- Bonus: adjusted price = price ÷ (1 + bonus %)
- Right: adjusted price = (price + right price × right %) ÷ (1 + right %)
Right shares in Nepal are generally issued at the Rs 100 par value, which is the calculator's default subscription price. The formulas match what NEPSE actually does. In September 2026 it adjusted Global IME Bank and Nepal Lube Oil for 4% and 15% bonuses, from previous closes of Rs 260.90 and Rs 277.40 to Rs 250.87 and Rs 241.22; both are the bonus formula to the paisa. On the right side, Century Commercial Bank's 25% right at Rs 100 on a Rs 390 share works out to (390 + 25) ÷ 1.25 = Rs 332, the figure in the same explainer.
Bonus and right on one book closure
When both land on the same date, the calculator applies them in one step: (price + right price × right %) ÷ (1 + bonus % + right %). That is the value of your holding after the issue, the old value plus the cash paid for the rights, divided by the new number of shares, and it reduces to each published formula when the other percentage is zero. A 10% bonus with a 50% right at Rs 100 on a Rs 600 share comes to Rs 406.25. The calculation assumes both percentages are on the same pre-closure holding. NEPSE does not publish a separate combined formula, so on a combined issue compare the result with the adjusted price it sets on the book closure day.
When the adjustment is smaller than the bonus
The percentage that matters is new shares divided by the shares that exist at book closure, and that is not always the announced figure. In 2015, Sana Kisan Bikas Bank announced a 25% bonus on its capital before a pending 2:1 right issue. With 100 shares growing to 150 after the rights, the 25 bonus shares were 16.67% of the new base, and NEPSE adjusted the price from Rs 1,575 to Rs 1,350 accordingly. For a case like that, enter the effective percentage rather than the headline one.
Why the price drop is not a loss
The before-and-after table under the results makes the point in numbers. A holder of 100 shares at Rs 500 who gets a 10% bonus has 110 shares at Rs 454.55: Rs 50,000 either way. With a right issue, the holding is worth the old value plus the cash you paid in, no more. That is why buying the day before book closure and buying the day after end in the same place, as the book closure guide shows, and why a right share is a call for fresh money, not a discount.
What this calculator leaves out
- Tax. Bonus shares are taxed at 5% like a cash dividend, which does not enter the price adjustment; the dividend tax guide covers how it is collected.
- Cash dividends. The adjustment formulas cover bonus and right shares only. A cash dividend paid alongside is not part of the calculation here.
- Trading costs and capital gains. Commission, the SEBON fee and the tax on an eventual sale are in the NEPSE capital gains calculator.
Frequently asked
- How is the share price adjusted after a bonus share in NEPSE?
- NEPSE divides the last price before book closure by one plus the bonus ratio: adjusted price = price ÷ (1 + bonus %). A 10% bonus on a Rs 500 share resets it to Rs 454.55. In September 2026 NEPSE adjusted Global IME Bank for a 4% bonus from Rs 260.90 to Rs 250.87, exactly this formula.
- How is the price adjusted after a right share issue?
- Add the subscription price times the right ratio to the pre-closure price, then divide by one plus the right ratio: (price + right price × right %) ÷ (1 + right %). Rights in Nepal are usually issued at the Rs 100 par value. A 25% right at Rs 100 on a Rs 390 share gives (390 + 25) ÷ 1.25 = Rs 332.
- What if bonus and right shares have the same book closure?
- The calculator applies both in one step: (price + right price × right %) ÷ (1 + bonus % + right %), which is the value of the holding after the issue, including the cash paid for the rights, spread over the new number of shares. It assumes both percentages are on the same pre-closure holding. NEPSE does not publish a separate combined formula, so check the adjusted price it sets on the book closure day.
- Which price does NEPSE use for the adjustment?
- The last traded price before the book closure date, in practice the previous trading day's close. That is why the price you see on the book closure morning is lower than the evening before even if nobody has traded: the reference price has been reset, not knocked down by selling.
- Why did NEPSE adjust by less than the announced bonus?
- Usually because the bonus was declared on a different share base. In a 2015 case, Sana Kisan Bikas Bank announced a 25% bonus on its capital before a pending 2:1 right issue, so NEPSE adjusted the price by 16.67% instead, from Rs 1,575 to Rs 1,350. Enter the effective percentage, new bonus shares divided by the shares that exist at book closure, to reproduce such a case.
- Does a bonus share make me richer?
- Not on the day. You hold more shares at a proportionately lower price, so the holding is worth the same, as the before-and-after table shows. Bonus shares are also taxed at 5% like a cash dividend. Whether they build wealth depends on what the company does with the profit it kept instead of paying out.
The numbers behind the sliders
A calculator gives you the shape of the decision; these guides give you the current Nepali numbers to feed it.
- Right shares vs bonus shares vs cash dividendWhich corporate action hands you something, and which asks for a cheque.
- Book closure dates on NEPSEWho gets the bonus, who gets nothing, and the one-day cutoff rule.
- Bonus share vs cash dividendBoth taxed 5%. The difference is when you pay capital gains.
- How NEPSE dividends are taxedThe 5% withheld at source on cash and bonus alike, and what you net.
- Capital gains tax on shares in Nepal7.5% or 10% by holding period, and how weighted-average cost works.
Import your bank statements, watch the actual monthly surplus, and check it against the number you just slid to. Free, built for Nepali banks and wallets.
Start tracking free