My kids are:
DS 17 yrs - only has to keep his bedroom clean, take out garbage, and keep the downstairs bathroom clean, since he is the one who primarily uses it. He used to do more, but with post-secondary school and work, he doesn't have as much time. He started his first meal clean-up at 5 years, like all the rest of my children.
DD 15 yrs - she currently does kitchen cleanup after supper every night. She also has a zone in the house which is her responsibility to keep tidy. And once a week on our cleaning day, she cleans more thoroughly in her zone and helps out anywhere that needs help. She gets paid for doing laundry. $1 a load (wash, dry, fold, put away). She also started out with breakfast cleanup at age 5.
DD 12 yrs - she currently does lunch cleanup everyday. Like her sister, she also has a zone to keep clean. She also gets paid for doing laundry. She also started out with breakfast cleanup at age 5.
DS 8 yrs - he currently does breakfast cleanup. He also has a zone.
DS 4 yrs - he will be 5 by the time school starts in the fall and he will be assigned his first household chore. Right now he just helps as needed, picking up toys, clothes, vacuuming stairway, sweeping, dusting.
DS 2 yrs - he makes most of the messes!
With joy!
Stacy