1台per payment the dealer is part of · Every payment between the dealer and another player carries 1 extra tai. Payments between two non-dealers carry none.
Example
chow二萬2三萬3
四萬4五萬5六萬634772349995
South self-draws, East round, East deals.
Self-draw 自摸 1 tai
In one line1 tai by default (per payment the dealer is part of). Every source that lists it agrees.
Conditions
The dealer wins: every payer adds it.
A non-dealer self-draws: only the dealer's payment adds it.
The dealer discards into a non-dealer's win: the dealer's payment adds it.