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PSE position size calculator

How many shares to buy on the PSE for the risk you can afford, rounded to board lots, fees included.

Broker fees and limits

Defaults: 0.25% commission (₱20 minimum) + 12% VAT, 0.005% PSE fee, 0.01% SCCP fee; selling adds 0.6% stock transaction tax. Adjust to your broker.

Buy

1,200 shares

12 board lots of 100 at ₱10.00 = ₱12,000 plus ₱35 fees. 12.0% of your capital.

₱1,094real loss if stopped out, fees included
8.0%distance to stop
₱10.12break-even sell price
₱12,035total cash needed

Reward targets (net of all fees)

TargetSell atNet profitNet R
1R₱10.80₱8090.74
2R₱11.60₱1,7601.61
3R₱12.40₱2,7112.48

Net R is below the nominal R because fees and the 0.6% sales tax eat into every round trip. Tight stops on low-priced stocks suffer most.

For long positions only. Board lots follow the PSE tier table; confirm the current lot for your stock in your broker app. This is a sizing tool, not investment advice.

The one rule that keeps small accounts alive

Decide how much you are willing to lose before you decide how much to buy. Risk 1% of a ₱100,000 account and you can be wrong ten times in a row and still have 90% of your capital. Risk 10% and three bad trades cost you a quarter of it. Position size is the bridge between that rule and the buy button.

How the math works

Risk amount = capital × risk %. Risk per share = entry − stop. Shares = risk amount ÷ risk per share, rounded down to the PSE board lot for that price tier. The tool then adds your broker's commission, VAT, PSE and SCCP fees on the way in and the 0.6% stock transaction tax on the way out, so the "real loss" and break-even price are what you would actually see in your ledger.

Board lots matter on the PSE

You cannot buy 37 shares of a ₱12 stock; the lot is 100. For a ₱0.80 stock the lot is 1,000 and for a ₱1,500 stock it is 5. On small accounts the rounding can wipe out your whole position, which is why the tool says so instead of guessing.

Questions

Which risk % should I use?
Most position-sizing guides suggest 1% to 2% per trade for active traders, and less while you are still learning. Long-term investors who do not use stops size by allocation instead, which is what the "max % of capital" limit is for.
Are the fees exact?
They match the standard PSE fee structure with a 0.25% commission and ₱20 minimum, which most online brokers use. Some charge less on larger trades; edit the commission fields to match yours.
Can I use this for short selling?
No. It assumes the stop is below the entry, which is a long position. Short selling on the PSE is limited to a small list of eligible stocks anyway.

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