What is a worked example of Round Turn Commission?

Direct answer

Round turn commission is a commission charged for a complete trade cycle: opening the position and then closing it. A “worked example” shows the exact arithmetic using stated assumptions (such as trade size, commission rate, and whether a minimum fee applies). Because fee rules vary by provider, the example should be verifiable by applying the same inputs to the fee schedule you are using.

Mechanism or definition

To work with round turn commission, separate the concept from the inputs that can change:

1. Trade cycle (mechanics)

• “Round turn” means two legs:
  • Leg 1: trade entry (opening).
  • Leg 2: trade exit (closing).
• A round turn commission is meant to cover both legs as one charge.

2. Fee model (inputs) Common fee schedules describe commission in one of these ways (the unit matters):

• Commission per unit of traded size (for example, per lot or per contract).
• Commission as a fixed amount per trade (less common for variable-size accounts).
• Commission with a minimum charge (even small trades pay at least the minimum).

3. Cost calculation (arithmetic) A generic worked-example structure is:

• Total commission = (round turn commission per unit) × (number of units)
• If there is a minimum: Total commission = max(calculated commission, minimum commission)

4. Important separation

• Stable mechanics: you charge for entry+exit as one cycle.
• Variable conditions: actual execution price, spreads, swaps/rollover, and provider-specific fee details can change total cost even if the round turn commission rule is correctly applied.

Worked example (transparent numbers)

Assumptions (state these clearly so the result is independently checkable):

• You trade 2 “units” according to the provider’s definition (e.g., 2 lots). Call this Volume = 2.
• The provider’s round turn commission rate is 3 monetary units per unit of volume.
• There is no commission minimum.
• Only commission is considered here. Other costs (spread, swap/rollover, financing, taxes, and any extra adjustments) are ignored.

Step-by-step:

1. Compute commission per round turn for your trade size:
   • Commission = 3 × 2
2. Total commission for the round turn:
   • Commission = 6 monetary units

Interpretation:

• The 6 monetary units covers both legs (opening and closing) together as one round turn fee, based on the assumptions.
• If you instead used the provider’s schedule incorrectly (for example, treating the rate as “per leg” rather than “per round turn”), you could double the commission.

Limitations and risks (what can fail)

1. Fee schedule mismatch

• Providers may describe fees per leg, per round turn, per contract, per lot, or with minimums. Using the wrong unit interpretation is a common failure mode.

2. Minimums and tiering

• If a minimum commission applies, the arithmetic “rate × volume” may understate total commission for small trades.

3. Mixed cost components

• People often compare “commission” versus “total trading cost” but forget that spreads, swap/rollover, and other adjustments can be material. A worked commission example will not capture those.

4. Execution and other operational effects

• Even if commission is purely rule-based, other operational factors (such as how fills are reported, partial closes, or how the platform counts trade cycles) can change what counts as a complete round turn in practice.

5. Jurisdiction and account-specific rules

• Tax treatment, account type rules, and provider documentation can affect the final cost. Since those are variable, you should verify using the specific fee schedule and account terms that apply to your situation.

Verification and next question

To independently verify a round turn commission number:

• Start from the provider’s fee schedule that explicitly states whether the rate is “per round turn” and what unit it uses.
• Write down your trade size in that same unit.
• Apply: calculated commission = (rate) × (volume), then apply any minimums exactly as stated.

If you want a more realistic example, the next question to clarify is: does your provider’s stated commission rate apply per round turn or per leg, and are there minimum fees or tiered rates?