One thing to be mindful of on CIS work aside from the current HMRC Legislation effecting CIS Umbrella solutions is CIS gross status for your business.
If its CIS applicable Until you get it the end customer will deduct 20% of the total invoice value from you upfront which could cause issues with cashflow paying staff, dependent on what payment vehicle you use to pay contractors.
Its an issues for factors as we only advance 90% on the invoice value so would be 90% on the 80% so to speak. and generally margins may not be enough to cover it.
However if your managing payroll yourself and the guys are limited or Self employed you deduct the 20% from their pay negating the issues.
I think its 30k of CIS applicable Turnover per director before you can apply for Gross status . but don’t quote me look on HMRC as its been a few months since i saw one of these businesses.
feel free to pick my brains if you need too