CIS Tax: We Handle Monthly Compliance So You Avoid Penalties and Errors
From subcontractor verification to monthly returns, we handle your entire CIS setup.
Incorrect filings or missed returns can lead to penalties. Many contractors get this wrong.
If something is wrong, HMRC comes to you, not the subcontractor.
Over- or under-deduct and HMRC can recover it from you.
Who Needs to Deal with CIS?
If you pay for construction work or are paid under CIS, the monthly system must be set up correctly.
You pay subcontractors for construction work.
Tax is deducted before you are paid.
You hire subs and also work as a sub.
CIS applies per payment. Small jobs and one-off subcontractors still count.
What You're Required to Do
CIS requires ongoing monthly compliance, not just setup.
HMRC expects verification, deductions, returns, and statements to be right every month.
Late or wrong filings cost money. Penalties stack and incorrect deductions become your liability.
Why contractors get CIS wrong
Small mistakes in deductions or filings can lead to penalties or tax exposure. Most accountants do not manage CIS monthly, so gaps are common. Incorrect setup leads to ongoing compliance issues.
Nil returns can still be required when you paid no one. Missing them triggers penalties.
We review your setup, flag risk, and spell out what needs fixing.
What Happens If You Get It Wrong
- £100 penalty for being 1 day late
- £200+ for continued delay
- Up to £3,000 for ongoing non-compliance
- Full liability for incorrect deductions
Liability sits with you as the contractor, not the subcontractor.
We Handle CIS End-to-End
Verification, deductions, returns, and statements run every month. We keep the full cycle consistent so you are not chasing HMRC deadlines after hours.
No manual tracking. No missed filings. We handle everything.
We spell out what we take over and what each month looks like for you.
Different Roles. Different CIS Risks.
- Responsible for deductions
- Must file monthly returns
- Errors are your liability
- Tax deducted before payment
- May be overpaying
- Needs proper reclaim
- Two roles, two rule sets
- Mistakes compound fast here
- Clarity saves money
Already Have an Accountant?
CIS is not standard accounting. Most setups are incomplete.
- CIS bolted on, not owned monthly
- You chase them when something breaks
- Nil returns and verification slip
- CIS run every month by design
- Built for contractors and subcontractors
- Filings, verification, and statements on cadence
If CIS is not on a monthly checklist, you are exposed even with a good accountant elsewhere.
Simple, Done-for-You Process
FAQs
If you're a contractor paying subcontractors, yes, before you pay anyone for the first time.
You're likely being paid under the higher rate. Once you're verified correctly, CIS deductions are usually 20% rather than 30%.
Yes. CIS deductions are advance tax payments, and you can reclaim overpaid amounts through the right return process.
If approved, you're paid in full with 0% CIS deductions, but the compliance standard is higher.
Often, yes. Nil returns can still be required. Skipping them can trigger penalties.
Only if they actively run CIS every month. Many accountants focus on year-end filing. CIS is a monthly system.
Get CIS Handled Properly
We review your setup, flag risks, and run compliance end to end.