My son is almost 15.
I have a list on the fridge breaking down daily, weekly, and monthly chores for both of us.
I often have to remind him of his. If I don't, they don't get done, then I get mad and yell, then it all goes downhill.
I have explained to him that I am tired of reminding, and that at his "advanced" age he needs to step up. And he is trying. I notice that it takes less reminders, or he will tell me, "don't worry, I am going to go do X".
I pay him a flat monthly allowance that covers chores, pet care, lawn mowing, whatever. But it is the only money I give him each month - he can spend it anyway he likes - save it, buy games, extra lunch at school, whatever. If he does not get his chores done, I do not pay him. I recently told him that if he does not consistently get his chores done, I will stop paying him for the rest of the year. He is doing much better now. LOL
It is about consistency, positive reinforcement, and set consequences. In my case, since there is only my son and me, I have taught him that we are a team and our home is *our* responsibility.
Good Luck
God Bless