For tradespeople and construction workers in the UK, managing finances can be more complex than in other industries. The Construction Industry Scheme (CIS) introduces additional rules that affect how income and tax are handled.
Understanding CIS and maintaining accurate bookkeeping is essential for staying compliant and managing your finances effectively.
What Is the Construction Industry Scheme (CIS)?
CIS is a scheme set up by HMRC that applies to contractors and subcontractors working in construction.
Under CIS:
- contractors deduct money from subcontractors’ payments
- these deductions are passed to HMRC as advance tax payments
How CIS Affects Subcontractors
If you are a subcontractor, your contractor will deduct:
- 20 percent if you are registered with CIS
- 30 percent if you are not registered
These deductions count towards your tax and National Insurance contributions.
Why Bookkeeping Is Essential for CIS
Accurate bookkeeping is particularly important under CIS because:
- deductions must be tracked correctly
- income may vary across projects
- tax calculations depend on accurate records
Without proper records, it can be difficult to understand your true earnings.
What Records Should You Keep?
Tradespeople and subcontractors should keep records of:
- all invoices issued
- payments received
- CIS deductions
- business expenses
- receipts and materials costs
HMRC requires records to be kept for at least 5 years.
Claiming Expenses
CIS subcontractors can reduce their tax liability by claiming allowable business expenses.
Common examples include:
- tools and equipment
- travel to job sites
- protective clothing
- vehicle expenses
- training related to your work
These expenses must be wholly and exclusively for business purposes.
Cash Flow Considerations
CIS deductions can affect cash flow because tax is taken at source.
This means subcontractors may receive less income upfront.
Proper bookkeeping helps you:
- track deductions
- manage cash flow
- plan for tax payments
Filing Your Tax Return
Even though CIS deductions are made, subcontractors must still complete a Self-Assessment tax return.
This allows HMRC to calculate whether:
- you owe additional tax
- you are due a refund
How a Bookkeeper Can Help
Managing CIS, bookkeeping and tax returns can be time consuming.
A bookkeeper can:
- track CIS deductions accurately
- organise financial records
- prepare information for tax returns
- ensure deadlines are met
This reduces stress and helps you stay compliant.
Bookkeeping for tradespeople and construction workers requires careful attention, especially under the Construction Industry Scheme.
Keeping accurate records and understanding how CIS works can help you manage your finances more effectively and avoid issues with HMRC.
Cloud Bookkeeping Warwick supports tradespeople and construction businesses across the UK with bookkeeping, CIS support and tax preparation.
If you need help managing your finances, professional support can make running your business much simpler.
If you would like to arrange a free consultation call, please get in touch.