The Construction Industry Scheme comes with strict monthly filing deadlines, deduction calculations, and verification requirements that catch out even experienced contractors. Direct Assist Accountants manages CIS compliance for both contractors and subcontractors across Slough, ensuring correct deductions, on-time HMRC submissions, and — where subcontractors have overpaid — maximum tax refunds claimed back.
Contractors juggling multiple subcontractors often miss the 19th-of-the-month CIS return deadline, apply the wrong deduction rate because a subcontractor wasn't verified correctly, or fail to keep the paperwork HMRC expects during a compliance check. Subcontractors, meanwhile, frequently overpay tax through CIS deductions and never claim it back because they don't realise a refund is due. We handle both sides of this scheme correctly, so contractors stay compliant and subcontractors get every penny they're owed.
CIS applies to almost everyone working in construction in and around Slough, whether you pay subcontractors or are paid as one.
Confirming correct deduction rates with HMRC before payments are made
Accurate preparation and on-time filing every month
Correct statements issued to subcontractors as required by law
Calculating and claiming tax refunds owed to subcontractors
Organised CIS records ready for any HMRC compliance check
Ensuring CIS deductions are correctly reflected in your annual tax return
Standard rate is 20% for registered subcontractors and 30% for those not registered with HMRC under CIS, while verified subcontractors can qualify for gross payment status (0%).
Contractors must file monthly CIS returns by the 19th of each month following the tax month in which payments were made.
Many subcontractors overpay tax through CIS deductions relative to their actual tax liability — we review your figures and claim back any refund due.
HMRC charges automatic penalties starting at £100 and increasing the longer the delay continues.
Verification is generally required for new subcontractors or those not paid within the current or previous two tax years.
Our team is part of Direct Assist Accountants' ACCA-regulated practice in Slough
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Direct Assist Accountants have been incredibly reliable in managing our bookkeeping, payroll, and tax returns. Their team is always available to answer questions and explain things clearly, making our accounting stress-free. We feel confident knowing everything is handled accurately and on time. Highly recommended for any business looking for professional support in Slough!
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