CIS Accountant Newham — Construction Industry Scheme Specialists
Need a CIS accountant in Newham? 121 Accounting is a full-service accounting firm based in East Ham, East London, helping contractors and subcontractors across Newham stay compliant with the Construction Industry Scheme. From HMRC registration to monthly returns and deduction statements, we handle it all for a fixed monthly fee from £99.
CIS Accounting for Newham Contractors & Subcontractors
Whether you're a contractor managing subcontractor payments or a subcontractor wanting to reduce your deduction rate and reclaim overpaid tax, our Newham-based team handles the entire Construction Industry Scheme process for you. We work with builders, electricians, plumbers, decorators, and construction firms across East Ham, Stratford, Beckton, Plaistow, and the wider borough.
The Construction Industry Scheme can be confusing to navigate on your own — between monthly deadlines, verification checks, and deduction rates that vary by contractor status, it's easy to fall behind or overpay tax without realising it. Our team handles every part of the process alongside your regular bookkeeping and VAT returns, so you can focus on the job in hand rather than the paperwork.
What we offer:
- CIS registration as a contractor or subcontractor with HMRC
- Monthly CIS300 returns filed accurately and on time
- Subcontractor verification to confirm the correct deduction rate
- Deduction statements issued to your subcontractors every month
- Support reclaiming CIS deductions through your Self Assessment or year-end accounts
- Ongoing bookkeeping and VAT support alongside your CIS compliance
Contractor or Subcontractor? We Support Both
Whether you're paying subcontractors, being paid as one, or both, we tailor our CIS service to your role in the chain.
As a Contractor
You must register with HMRC before your first subcontractor payment, verify each subcontractor's status, deduct the correct rate (20% or 30%), file a monthly CIS300 return, and issue deduction statements. Missing a monthly return carries an automatic £100 penalty.
As a Subcontractor
Registering reduces your deduction rate from 30% to 20% — or to 0% if you qualify for gross payment status. If too much has been deducted over the year, you can reclaim the difference through your Self Assessment tax return or your limited company accounts.
Who We Work With
Our Newham-based CIS clients cover the full range of construction trades:
- Builders and general contractors managing multiple subcontractors
- Electricians, plumbers, and heating engineers working across East London sites
- Decorators, plasterers, and tilers operating as subcontractors
- Groundworkers, scaffolders, and roofers billing under CIS
- Property developers coordinating trades on refurbishment projects
Simple, Fixed Pricing
CIS support is included as part of our monthly accounting packages, so there are no separate hourly charges for registrations, returns, or verifications.
Fixed monthly packages start from £99 and include CIS registration, monthly returns, and deduction statement processing alongside your regular bookkeeping and tax compliance. See our full pricing page for package details, or get in touch for a quote tailored to your business.
⭐ What Our Clients Say
Rated 5.0 from 52 Google reviews
"An accountant that takes your hand and makes things simple is rare. 121 Service is like a mentor to guide you from A-Z. They give my business peace of mind and focus on growth."
"Akmol accounting firm delivers exceptional, reliable service with a personal touch that makes managing finances a breeze!"
Frequently Asked Questions
Do I need to register for CIS?
If you're a contractor paying subcontractors for construction work, you must register with HMRC as a contractor. Subcontractors should also register — unregistered subcontractors have 30% deducted from payments instead of the standard 20%.
How often are CIS returns due?
Contractors must submit a CIS return to HMRC every month, even in months with no subcontractor payments. Late returns carry an automatic £100 penalty, rising the longer they remain outstanding.
Can I claim back CIS deductions?
Yes. If you're a subcontractor and too much has been deducted from your payments, you can reclaim the difference through your Self Assessment tax return or, if you operate through a limited company, via your year-end accounts.
What is gross payment status?
Gross payment status means subcontractors are paid in full with no CIS deduction, and instead settle their tax and National Insurance through Self Assessment at year-end. Qualifying depends on turnover and compliance history — we can check your eligibility.
What happens if I don't verify a subcontractor?
If you don't verify a subcontractor with HMRC before paying them, you must deduct the higher 30% rate rather than the standard 20%. We handle verification for every subcontractor you work with to make sure you never overpay.
Do you work with contractors outside Newham?
Yes — while we're based in East Ham, East London, we support CIS contractors and subcontractors across East London and Essex, and nationwide using cloud accounting software.
Ready to Get Your CIS Sorted?
Speak to one of our qualified accountants today for a free, no-obligation consultation about your CIS registration, returns, or reclaim.
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