CIS Invoicing Made Easy for Subcontractors
Automatic CIS deductions built in — HMRC-friendly. Invoice faster, get paid faster. Made for subcontractors and self-employed trades.
Tired of CIS Admin Headaches?
You're not alone. Here's what we hear from tradespeople every day:
"I spend hours calculating CIS deductions manually"
Spreadsheets, calculators, double-checking rates... it's eating into your time on the job. You didn't become a tradesperson to be an accountant.
"I'm worried about making HMRC mistakes"
One wrong calculation could mean trouble with HMRC. The stress of getting it wrong keeps you up at night.
"I just want to focus on my craft, not paperwork"
You love what you do. But invoicing feels like a chore that takes you away from the work you're passionate about.
Flow solves all of this
CIS deductions calculated automatically. HMRC-compliant invoices in minutes. Clear breakdowns showing exactly what you're owed. No spreadsheets, no stress, no mistakes.
CIS (Construction Industry Scheme) is a UK tax scheme that requires contractors to deduct tax from payments made to subcontractors for construction work. The deduction is made from the labor portion of the payment, not materials or VAT. Flow handles all of this automatically.
Everything you need for CIS invoicing
Flow handles all the complexities of CIS calculations so you can focus on your work.
Automatic CIS Calculations
CIS deductions are calculated automatically based on your subcontractor's payment status. No manual calculations required.
CIS Breakdown on Invoices
Clear breakdown showing labour value, materials value, CIS deduction rate, and net payment due on every invoice.
Client CIS Profiles
Store CIS details (UTR, payment status, NINO) for each subcontractor client. Auto-fill deduction rates when creating invoices.
Category-Based Classification
Easily categorise line items as labour, materials, or other. CIS deductions apply only to labour items.
HMRC Compliant
Support for all CIS deduction rates (0%, 20%, 30%) and proper VAT handling alongside CIS deductions.
Seamless Integration
CIS features work seamlessly with your existing invoicing workflow. Toggle CIS on per invoice as needed.
CIS Deduction Rates
Flow supports all three CIS deduction rates, automatically applying the correct rate based on your subcontractor's status.
For subcontractors approved by HMRC to receive payments without deductions.
The most common rate for registered subcontractors. Applied to labour costs only.
For subcontractors who are not registered with HMRC for CIS.
Why UK Tradespeople Choose Flow
Built for subcontractors who want invoicing that works, not software that gets in the way.
Stop wasting hours on manual CIS calculations and spreadsheets. Create professional invoices in minutes, not hours. More time on the tools, less time on paperwork.
No more calculation errors that could cost you. Automated CIS deductions update in real-time as you edit invoices. Get it right the first time, every time.
All CIS deduction rates (0%, 20%, 30%) handled automatically. Proper breakdowns showing labour, materials, and deductions. Keep HMRC happy without the admin headache.
See exactly what you're owed after CIS deductions. Track labour vs materials easily. Know your numbers at a glance without digging through paperwork.
CIS deductions calculated correctly every time. Proper VAT handling alongside CIS. Keep your records straight for tax season without the stress.
Built specifically for UK tradespeople. No complicated software that makes you feel like an accountant. Simple, reliable invoicing that just works.
How it works
Getting started with CIS invoicing in Flow is simple.
Set up your subcontractor clients
Add CIS details (UTR, payment status, NINO) to your client profiles. This information is saved for future invoices.
Enable CIS on your invoice
When creating an invoice, toggle CIS on. Flow automatically applies the correct deduction rate based on your client's payment status.
Categorise your line items
Mark each line item as labour, materials, or other. CIS deductions are automatically calculated only on labour items.
Get your CIS breakdown
Your invoice automatically shows a clear CIS breakdown with labour value, materials value, deduction rate, amount deducted, and net payment due.
Stop Struggling with CIS Invoicing
Join UK subcontractors and tradespeople who've ditched the spreadsheets and manual calculations. Get back to what you do best — your craft.
Important: While Flow helps you calculate CIS deductions correctly, we recommend consulting with a qualified accountant or tax professional to ensure full compliance with HMRC requirements. Tax laws can be complex and change frequently.