You keep the price you list. Supporters cover the platform fees at checkout and see the full total before they pay.
You keep 100% of the price you set. Fees are added on top at checkout and paid by the supporter, who sees the full total before they pay anything.
What that means in practice
List something at £4.99 and £4.99 is what reaches your balance. The supporter's card is charged more than that, and the difference never passes through your earnings.
The rate is not one number
It varies by payment method — a bank payment costs less to process than a card, so the total a supporter pays is lower — and some creators are on individually negotiated rates. That is why you will not find a single percentage published anywhere: any one figure would be wrong for someone.
The exact breakdown for any sale is on that transaction in your financial dashboard.
The rate is frozen on each sale
Whatever rate applied when a sale was made stays recorded against it. If your rate later changes, your past transactions are not re-costed.
Separately, the subscription
The monthly creator subscription is a flat fee, not a commission. The two are unrelated.