Free calculators for contractors who subcontract
The sums an office does every week when it sends work out. Free, with no sign-up. Everything is worked out in your browser: nothing you type is sent to us or stored.
Subcontract margin calculator
Your profit, margin and markup on every trade you send out, and the most you can pay a subcontractor to keep your margin.
CIS deduction calculator for contractors
What to keep back from a subcontractor's invoice and what to pay them, at 20%, 30% or gross, with VAT and the reverse charge handled.
VAT reverse charge checker for construction
Seven questions from GOV.UK that settle whether an invoice carries VAT or the reverse charge, with the wording the invoice needs.
Where SUBR comes in
SUBR is AI software for UK contractors who send work out to subcontractors. Its AI reads your client quote, your office names each trade's share, and SUBR builds every scope with your costs, margin and client price left off it. Each subcontractor answers on their own link and sees only their own price.
See it on a quote
A short call. We walk a dummy quote from PDF to jobs on site.