How to work out what an intraday trade leaves in hand after charges

An intraday trade can look good on the screen and still leave very little profit in the account. The difference is the cost. An intraday calculator shows that difference before the trade is placed, so a trader can decide whether the move they expect is worth the effort.

The calculator needs a few inputs: the buy price, the sell price, the quantity, the segment (equity or F&O), whether the trade is intraday or delivery, and the exchange, such as NSE or BSE. It then lists every charge and shows the profit or loss after deducting all of them. The check takes a few seconds, so it fits easily into daily trading.

Every intraday trade carries several charges. Brokerage is the amount the broker keeps for executing the order. Some brokers charge a fixed amount per order, others a share of the trade value. The Securities Transaction Tax (STT) is a government tax, and its rate varies by segment. In equity intraday it is payable only on the sell side. The exchange transaction charge goes to the exchange and is levied on the value of the trade. The SEBI turnover fee is a small levy on turnover to cover the regulator's costs. GST is 18 per cent and applies to brokerage as well as charges such as the exchange and SEBI fees. Stamp duty is payable only on the buy side. No single charge looks large, but together they decide how much of the total profit reaches the trader.

The formula for net profit has two steps. First work out the gross profit or loss: (sell price - buy price) x quantity. Then subtract the total costs. The result is the net profit or loss.

Take a hypothetical example. A trader buys 200 shares at Rs 250 and sells them at Rs 253. The gross profit is 3 x 200 = Rs 600. Suppose the total charges for the round trip come to Rs 100. The net profit is then Rs 500, meaning costs took about one-sixth of the gross earnings. To see the exact breakdown of a trade, the figures can be entered in Ventura's brokerage calculator.

Then there is the break-even. It tells how far the price must move for the trade to cover its costs. In the same example, spreading the Rs 100 cost over 200 shares comes to 50 paise per share. The price must therefore rise at least 50 paise just to cover costs, and every move beyond that is profit. In a short sale the same calculation runs the other way: the price must fall by at least that much. This is where small targets get caught. A trader who aims for a Rs 1 move per share has, in this example, already given up half of it to costs.

This matters for intraday strategy because costs multiply with frequent trading, and a strategy built on many small wins can lose its edge once charges are counted. A tight target leaves little room for slippage or unfilled orders. With fixed-fee brokerage, a larger quantity spreads the fixed fee over more shares and lowers the cost per share, although the amount at stake rises. Fixed-fee and percentage-based brokerage behave differently as the trade size changes, and changing the quantity and price in the calculator shows how the total cost shifts.

The calculator is best used to run the numbers before the trade, not after. Try a few different exit prices to see how the net result changes. Traders who deal in more than one segment should work out the cost of the same trade in each. Review past trades from time to time to see how much of the gross profit went to charges. And check current rates before relying on figures from an old article or note, because charges can change.

Common mistakes include looking only at gross profit, counting charges on one side of the trade instead of both buy and sell, setting a target smaller than the break-even move, and assuming charges are the same in every segment.

In sum, a good intraday plan starts with costs. The calculator turns a rough estimate into a clear figure, shows the break-even move and helps the trader decide whether a setup is worth putting money into. Traders who check costs before a trade choose their trades more carefully and face fewer surprises at the end of the day.