Can I send CIS invoices?
Yes. Mark a customer as a CIS contractor and their invoices carry the CIS deduction on the labour, extras included unless they’re materials; a householder’s don’t, because householders are outside CIS (HMRC: CIS 340).
Can I invoice a build in stages?
Yes. Invoice each stage as a percentage of the quote or an amount, and you see what’s left to bill. The final invoice takes any deposit and every stage off and asks for the balance.
What does CIS take off my invoice?
A registered subcontractor has 20% deducted, an unregistered one 30%, and gross status none; there’s no deduction on VAT or on materials you paid for directly (GOV.UK: what you must do as a CIS subcontractor).
When does the domestic reverse charge apply?
Between VAT-registered businesses for construction services reported under CIS, unless the customer is an end user; never to a private householder (GOV.UK: VAT domestic reverse charge).
Can I charge interest when a contractor pays late?
On business-to-business debts, statutory interest is 8% plus base rate, with a fixed £40 to £100 recovery charge (GOV.UK: late commercial payments).
Can the main contractor pay me only when they get paid?
On a construction contract, a “pay when paid” clause is ineffective unless the payer’s payer is insolvent (s113). A contract with a homeowner who lives there is outside those rules (s106).
How do I get my CIS numbers to my accountant?
Export everything: your invoices come out as a CSV with the CIS deduction on each, alongside the PDFs. Expenses export as a CSV too.