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# V4.0.0 - Introduction of New IB Commission Payout Model: Spread Percentage
**Released Date - 19 Mar 2022**
We are excited to announce the introduction of a new commission payout model for IBs: Spread Percentage. With this feature, you now have the ability to configure IB commissions to be paid out as a percentage of the spread, offering enhanced flexibility and customization options for commission structures.
This commission structure exclusively applies to MT5 only.
The calculation formula for the spread payout = Spread (Ask - Bid) x rebate parameter x lot size.
For instance, if a client trades 1 lot of USDJPY, with an entry ask price of 118.888 and an entry bid price of 118.868, the spread is calculated as (118.888 - 118.868) = 20 pips. Consequently, the IB receives a rebate: 20 pips \* 20% \* 1 lot = 4 USD.
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