请问ID和contractor的payment term？

请问大家找过ID或contractor的通常付款的比例是怎样分配的呢？现在在找ID/Contractor，所以想了解市场上付款比例。免得付太多的定金

像以下的算是market practice吗？
10% Upon confirmation as deposit;
40% Upon before delivery of materials/goods to site;
40% Upon commencement of carpentry works;
10% Upon completion and hand-over.

谢谢

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顶，装修过的可以分享一下吗？

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我的跟楼主的是一样的.

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