Partners are entitled to a share of the partnerships profits in proportion to their stake int he shareholding. i.e a person having a 40% stake in a partnership is entitled to 40% of its net profits. Generally speaking you would not change a partnership shareholding year on year. There is however no legal requirement around this. The % shareholding should be agreed in advance before any calendar period so that each person is aware of what effort they need to make and what the reward shall be.