Free tools

Calculators that give you the right number

Built for the parts of subcontracting where the answer is checkable — the arithmetic that has a right result, and the paperwork that has a defensible structure. Free to use, every rule traced back to the source it came from, and honest about what it cannot know without your documents.

• ITP generator

  Describe the work and get an inspection and test plan back — activities in build sequence, the controlling document, the record that captures each result, and hold and witness points marked. No sign-up. Criteria your scope does not establish come back as TBC rather than invented.

• CIS deduction calculator

  The deduction on a subcontractor invoice, with materials, hired plant and fuel taken off first. Handles 20%, 30% and gross status, and gives you the three figures for the payment and deduction statement.

The written answers live in the guides — inspection and test plans, hold points, and where a free RAMS generator stops.