Hello Ajsplumbingtilin,

Welcome to the Community page, 

We would advise you speak to a trained and qualified accountant who will be able to help you with this question as we are only technical support not trained accountants. 

Hi Ant

Your sales Invoice may include a breakdown of Labour and Material used and this is recorded as a sale in QB.

When you purchase materials I would just put them under Purchases in QB and this will be picked up when you produce your annual accounts in the same way you would for any expense such as motor,

Hope this is of assistance.

Dave B

Hello Dave, thanks for posting on this thread.