- Our Services
CIS Returns
Monthly CIS returns for contractors and subcontractors — accurate, on-time submissions so you stay fully compliant with HMRC’s Construction Industry Scheme.
- What We Do
CIS Compliance Made Simple
At InsightAccountax, we provide comprehensive tax accounting services covering VAT, Corporation Tax and Self Assessment. Our team ensures you’re always compliant with HMRC, filing accurately, and never paying a penny more tax than the law requires.
We combine deep technical knowledge with proactive planning — identifying reliefs, allowances and strategies that most clients don’t know they’re entitled to.
Whether you’re a sole trader navigating your first Self Assessment or a director managing Corporation Tax, we handle everything so you can focus on your business.
- Who It's For
CIS Services for Contractors & Subcontractors
Whether you pay subcontractors or get paid as one — we have you covered.
Contractors
Monthly Returns · Verification · Deductions
Monthly CIS returns filed with HMRC by 19th of each month
Subcontractor verification before first payment
Correct deduction rate applied — 20%, 30% or gross
Payment and deduction statements issued to subcontractors
HMRC correspondence and enquiry support
Subcontractors
Refunds · Self Assessment · Gross Status
CIS deduction tracking and record keeping throughout the year
Self Assessment return filed including CIS deductions offset
CIS refund claims to recover overpaid deductions from HMRC
UTR registration and CIS scheme registration with HMRC
- What's Included
Our Full CIS Service
Everything you need to stay CIS compliant — all under one roof.
01
Monthly CIS Returns
Contractor CIS returns prepared and filed with HMRC by the 19th of every month — on time, without exception.
02
Subcontractor Verification
We verify all subcontractors with HMRC before first payment to confirm their correct deduction rate and scheme status.
03
CIS Refund Claims
We claim back CIS deductions overpaid during the year through your Self Assessment return — maximising your refund.
04
Gross Status Applications
We handle gross payment status applications so qualifying subcontractors receive payment in full without CIS deductions.
05
Deduction Statements
Monthly payment and deduction statements issued to subcontractors — accurate records for their own tax filings.
06
HMRC Enquiry Support
Full support with any HMRC CIS enquiries, compliance checks or reviews — we handle all correspondence on your behalf.
- What's Included
Our Full CIS Service
Everything you need to stay CIS compliant — all under one roof.
19th
Monthly Return
CIS contractor return must be filed with HMRC by the 19th of each month
Monthly
19th / 22nd
CIS Payment
Deductions paid to HMRC by 19th (post) or 22nd (electronic) each month
Monthly
31 Jan
Self Assessment
Annual
5 April
Tax Year End
Annual
- Why Choose Us
Why Construction Businesses Choose InsightAccountax
CIS Specialists
Deep expertise in CIS — contractors and subcontractors both, across all trades in the construction industry.
Never Miss a Deadline
Every monthly return filed by the 19th — your CIS record stays clean and HMRC penalties never apply.
Maximise Your Refunds
We ensure every overpaid CIS deduction is identified and reclaimed — subcontractors consistently get more back.
HMRC Agent Authority
As a registered HMRC agent we deal with HMRC directly on your behalf — saving you time and reducing stress.
Our CIS Track Record
Years in Practice
10+
Compliance Record
100%
Satisfaction Rate
100%
Response Time
24hr
Missed Deadlines
Zero
- Common Questions
CIS Returns FAQs
What is the Construction Industry Scheme (CIS)?
CIS is a HMRC scheme that requires contractors to deduct money from subcontractor payments and pass these deductions to HMRC. The deductions count as advance payments towards the subcontractor’s tax and National Insurance bill.
Who needs to register for CIS?
Any business that pays subcontractors for construction work must register as a contractor under CIS. Subcontractors who work in the construction industry should also register to avoid the higher 30% deduction rate applied to unregistered subcontractors.
What happens if I miss a monthly CIS return?
HMRC issues automatic penalties for late CIS returns starting at £100 for one month late, rising significantly for prolonged delays. We file every return by the 19th so our clients never face these penalties.
Can subcontractors get their CIS deductions back?
Yes — subcontractors who have had CIS deductions taken can offset these against their Self Assessment tax liability. If deductions exceed the tax owed, HMRC issues a refund. We maximise these claims for all our subcontractor clients.