CIS job costing and deductions, automated from invoice to summary.

Preparing CIS information usually means repeated data entry and time spent bringing subcontractor records together by hand.

Bluequill has built an n8n workflow that takes a subcontractor invoice, applies the CIS deduction rate already on file, rolls it up against the job budget, and flags anything unverified before it's paid. What's below shows that workflow running — on a made-up job and made-up subcontractors, not a real client's figures.

The intended benefit is less repetitive admin and information that's easier to review. We haven't yet measured time savings or accuracy improvements on a real job, so we're not claiming either here.

The figures this produces still need checking against payment records and CIS requirements before they go into a return or a payment run. This is a demonstration of the automation — it doesn't submit anything to HMRC, verify a subcontractor's status, or replace your own or your accountant's review.