The Construction Industry Scheme (CIS) is a set of special rules for tax and National Insurance for those working in the construction industry. Businesses in the construction industry are known as 'contractors' and 'subcontractors' and should be aware of the tax implications of the scheme.

Under the scheme, contractors are required to deduct money from a subcontractor’s payments and pass it to HMRC. The deductions count as advance payments towards the subcontractor’s tax and National Insurance. Contractors are defined as those who pay subcontractors for construction work or who spent more than £3m on construction a year in the 12 months since they made their first payment.

Subcontractors do not have to register for the CIS, but contractors must deduct 30% from their payments to unregistered subcontractors. The alternative is to register as a CIS subcontractor where a 20% deduction is taken or to qualify for gross payment status whereby the contractor will not make any deductions, and the subcontractor is responsible to pay all their tax and National Insurance at the end of the tax year.

To qualify for gross payment status a subcontractor must meet certain criteria, including having paid their tax and National Insurance on time in the past and have a business that undertakes construction work (or provides labour for it) in the UK.

The subcontractor must also have a turnover of at least £30,000 for a sole trader (or higher depending on the structure of your business). An application for gross payment status can be made online or by post.

Know the rules for contractors & subs under CIS to avoid issues with HMRC.

Under the Construction Industry Scheme (CIS), HMRC applies specific tax rules to contractors and subcontractors in the construction industry. Contractors are responsible for deducting tax from payments made to subcontractors and forwarding it to HMRC. These deductions act as advance payments toward the subcontractor’s income tax and National Insurance.

A subcontractor is defined as any business or individual that agrees to perform construction operations for another business (a contractor or deemed contractor). This applies whether the work is done directly or through others such as employees or further subcontractors. Notably, a business typically considered a main contractor can be a subcontractor if hired by another contractor, such as a local authority.

Subcontractors can include:

• Companies, public bodies, partnerships and self-employed individuals.
• Labour agencies or staff bureaus that supply or employ workers for construction.
• Foreign businesses performing construction in the UK or its territorial waters.
• Local authorities or public bodies engaged in construction work for others.
• Gang-leaders who agrees with a contractor on the work to be done, and in turn receives payment for the work of the team.

Some businesses function as both contractors and subcontractors, paying others while also being paid for their services. These businesses must follow both sets of CIS rules depending on their role in each transaction.

The Construction Industry Scheme (CIS) requires contractors to deduct tax from subcontractor payments and file monthly returns with HMRC. Even if no payments are made, nil returns must be submitted to avoid penalties.

The CIS is a specialised set of rules governing tax and national insurance for individuals working within the construction industry. This scheme specifically applies to businesses operating as 'contractors' and 'subcontractors' within the construction sector. Under the provisions of the scheme, contractors are required to deduct money from a subcontractor’s payments and pass it to HMRC. The deductions count as advance payments towards the subcontractor’s tax and National Insurance.

One of the primary responsibilities for contractors under the CIS is the submission of monthly returns, which must be completed and filed online. These returns correspond to each tax month, which runs from the 6th day of one month to the 5th day of the following month. The deadline for submitting these returns is 14 days after the conclusion of each tax month.

It is important to note that even if no subcontractors have been paid during a particular tax month, contractors are still required to file a 'nil return.' The necessity to submit returns must be met regardless of whether the contractor typically submits PAYE returns on a quarterly basis. Contractors can file their monthly returns using the HMRC CIS online service or through commercial CIS software. Failure to submit the required returns on time may result in penalties and interest charges.

In cases where a contractor has not made any payments to subcontractors during a given tax month, they are still obligated to submit a 'CIS nil return' or inform HMRC that no return is necessary. Should this 'nil return' situation become a long-term occurrence, contractors have the option to request a period of inactivity from HMRC. This request indicates that the contractor has temporarily ceased employing subcontractors and lasts for a period of six months. It is important to notify HMRC if subcontractor payments resume within this time frame, as this could affect the contractor’s obligations under the scheme.

Contractors are defined as those who make payments to subcontractors for construction work or who have spent more than £3 million on construction in the 12 months following their first payment under the scheme.