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CIS Contractor's Monthly Return (CIS300) - Explained

CIS Contractor’s Monthly Return (CIS300)

CIS Contractor's Monthly Return (CIS300) - Explained

by Daniel at Taxfile.

The CIS Contractor’s Monthly Return is a mandatory requirement for contractors operating within the Construction Industry Scheme (CIS). It acts as a mechanism for contractors to disclose to HM Revenue and Customs (HMRC) payments issued to subcontractors and the corresponding tax deductions withheld from those payments. By providing HMRC with information regarding payments rendered and the accompanying tax deductions, the CIS Contractor’s Monthly Return guarantees transparency and adherence to regulations within the construction sector. In today’s guide, we explain the various components of the monthly ‘CIS300’ return, how the process works, key deadlines, the ramifications of non-compliance, and much more.

Key Components of the Monthly Return

The CIS Contractor’s Monthly Return typically includes the following key components:

This section includes information about the contractor, such as their name, Unique Taxpayer Reference (UTR), and contact details. Ensuring accuracy in this section is crucial for HMRC’s records and communication purposes.

Contractors must provide details of all subcontractors they have engaged during the reporting period. This includes the subcontractors’ names, UTRs, and payment amounts.

Contractors must report the total payments made to each subcontractor during the reporting period. This information helps HMRC track payments within the construction industry and verify compliance with tax obligations.

Contractors are required to calculate and report the tax deductions made from payments to subcontractors. The deducted amounts are typically based on the subcontractors’ verification status and tax treatment under the CIS.

The Monthly Return concludes with the calculation of the total amount due to HMRC, taking into account the tax deductions made from payments to subcontractors.

Deadlines and Reporting Periods

The CIS Contractor’s Monthly Return deadlines follow a structured timeline, which includes:

  • The submission deadline — contractors must submit their Monthly Returns to HMRC by the 19th of each month following the end of the reporting period. (Contractors’ payments to HMRC must also be made by this date).
  • The reporting period covered by each Monthly Return — which typically spans from the 6th of the previous month to the 5th of the current one.

Making Your CIS Payments to HMRC

Once you’ve calculated the total CIS deductions, prepare to make the payment to HMRC. You will need to have the following information ready:

  • Your Unique Taxpayer Reference (UTR) number;
  • Your payment reference, which is your 13-character Accounts Office reference number followed by the letter ‘C’ (e.g., 123PA12345678C);
  • The amount you’re paying.

HMRC offers various payment options for settling your CIS liabilities, which are explained here.

  • A contractor who operates as a limited company and also acts as a subcontractor might find that they are exempt from making any payments to HMRC. Subcontractors who do not have gross payment status will incur CIS deductions, which can then be used to offset any CIS payments owed to HMRC. This is exclusively available to limited companies. Please look out for our forthcoming blog focused on the CIS claim — a hyperlink will follow here once it’s live.

Implications of Non-Compliance

Failure to meet CIS Contractor’s Monthly Return deadlines can lead to various consequences, which may include the following:

  • Penalties — HMRC may impose penalties for late or non-submission of Monthly Returns, which can escalate over time.
  • Loss of benefits — non-compliance with CIS obligations, including Monthly Return deadlines, can lead to loss of benefits such as gross payment status, affecting contractors’ cash flow and competitiveness.

Managing the CIS Monthly Return Process

For contractors, efficiently managing the CIS Contractor’s Monthly Return process involves the following steps:

1. Maintain Accurate Records

Contractors should maintain accurate records of payments made to subcontractors and tax deductions applied. This includes keeping track of invoices, receipts, and CIS statements.

2. Timely Submission

The Monthly Return must be submitted to HMRC by the 19th of each month following the end of the reporting period. Contractors should ensure timely submission to avoid penalties and maintain compliance.

3. Use HMRC Online Services

HMRC provides online services for submitting CIS returns, making the process convenient and accessible for contractors. Registering for and using these online services can streamline the submission process and reduce administrative burdens.

The CIS Contractor’s Monthly Return is the key tool through which to report payments and tax deductions accurately to HMRC. Understanding its components and effectively navigating the submission process helps to ensure that contractors are compliant — and also avoids unnecessary penalties.

Rest assured, though: Taxfile is here when you need help with CIS returns and accountancy for construction workers, bookkeeping, CIS tax rebates for subcontractors, limited company accounts, and any tax-related matters that require professional help. We’re happy to provide guidance on compliance requirements, tax calculations, record-keeping practices, and much more.

CIS sub-contractor refunds

CIS Sub-contractors – Claim Your Tax Refund Now!

CIS sub-contractor refunds

[Updated April/May 2022]: It’s now time to start the process of claiming your tax refund if you are a sub-contractor working within the Construction Industry Scheme (‘CIS’). Refunds are usually fast through Taxfile.

What you need to do

Don’t delay – book an appointment with Taxfile today by calling 0208 761 8000 and we’ll sort it all out for you. We have staff who speak English, Polish, Pashto, Dari, Russian, French, and Dutch, should you need them on the day. Our Tulse Hill office is at 25 Thurlow Park Road, London SE21 8JP. Call 0208 761 8000 for an appointment — the first 20 minutes is free! Alternatively, you can have a ‘virtual’ appointment with us on Zoom, Teams, Google Hangouts, Skype, FaceTime, WhatsApp or whatever you prefer.

Outside of London? No problem – click here.

We’re open from Monday to Saturday in April & May (including early evenings Mon/Tues)

Our Tulse Hill office is open 6 days a week during April & May and offers Saturday morning appointments plus early evening appointments on Mondays and Tuesdays if standard office hours do not suit you (please call for details).

Check List

Read more

Further Delays on the Roll-Out of the Domestic Reverse Charge for the Building & Construction Services.

The domestic reverse-charge is a major change to the way VAT is collected by HMRC in the building and construction industry reporting under the Construction Industry Scheme (CIS).

It was being introduced to combat VAT fraud in the sector and the initial roll-out on 1st October 2019 was delayed due to a combination of the sector being ill-prepared for the change and Brexit. The date was moved forward 12-months to 1st October 2020 but due to COVID-19 the start date has been further advanced to 1st March 2021.

At Taxfile, we will start contacting our VAT clients working under the CIS, in preparation for the 1st March 2021 start date.

If you would like to know how to prepare your business for this, you will need to: Read more

CIS Tax Rebates

The Construction Industry Scheme (CIS) is where a construction contractor deducts, at source, a portion of the money due to their subcontractor. Whatever amount is deducted is then passed directly to HMRC which is then counted towards the tax and National Insurance of a subcontractor. This effectively pays the tax element in advance.

How much is deducted will depend on whether or not a subcontractor is registered under the CIS system. Unregistered subcontractors usually get a 30% deduction, while the registered ones get a deduction at the standard rate of 20%. This is one of the reasons that, by the end of the financial year, the amount deducted at source often ends up being overpaid.

But a bigger reason is the fact that the deductions did not factor in the personal allowance that every taxpayer in the UK is entitled to. The personal allowance for the tax year 2018-2019 was £11,850. Because of this overpayment, many subcontractors in the construction industry are due a tax refund.

You can also claim extensively for any work related expenses such as; accountant fees, travel, telephone, tools, clothing, etc.

It is a complex process and to ensure you get the maximum tax rebate let Taxfile help you.  

View our CIS Tax Refund Newsletter HERE

CIS - tax refunds for construction workers

Construction Industry Scheme (CIS): How to Claim a Tax Refund

CIS - tax refunds for construction workersIt’s now time to start the process of claiming your tax refund if you are a subcontractor working within the construction industry and have been paying tax, in advance, through the Construction Industry Scheme (‘CIS’). In this article we will tell you how you qualify and how to claim your tax refund. First, though, a little bit of background to the scheme:

The CIS Scheme

The Construction Industry Scheme, or CIS, is a scheme whereby a contractor in the construction industry usually deducts a proportion of the money due to their subcontractor, at source. The deducted amount is then passed direct to HMRC and counts towards the subcontractor’s tax and National Insurance, the tax element effectively being paid in advance. The exact proportion deducted depends on whether the subcontractor concerned has registered under the CIS system. If the subcontractor has not registered, the deduction will usually be made at a rate of 30%. If they have already registered, then the deduction will usually be made at a rate of 20%. Either way, by the financial year end, the amount of tax deducted at source will usually end up being more than they really needed to have paid, simply because it won’t have factored in the personal allowance which every UK taxpayer is entitled to (most UK citizens can earn up to £10,000 before paying tax at time of writing, this figure being set to rise to £10,600 in the tax year 2015-16, 10,800 a year later then increasing to £11,000 by 2017-18 following the recent budget proposals). Hence, many subcontractors in the construction industry will be due a tax refund because of the overpayment. The good news is that the time to apply for the refund is pretty much now, so get in touch if you’d like our help claiming.

What kind of work does CIS cover?

You qualify to be in the CIS system if you are a subcontractor who supplies construction work to buildings. This includes labouring, decorating, site preparation and refurbishment but excludes things like architecture, surveying services, the hire of scaffolding without labour, the fitting of carpets, the delivery of materials, and finally non-construction type services such as site facilities (canteens etc.).

What if your business is not in the UK?

Even if your business is abroad, the same rules apply if you work as a subcontractor within the UK. However there are some slightly different rules regarding the treatment of taxation for non-resident workers from countries which have ‘Double Taxation’ treaties with the UK (we can, of course, also help with that — just get in contact).

Registering for CIS

If you haven’t already registered for CIS as a sub-contractor, Taxfile can help to do this for you. You’ll need to be registered for Self Assessment (we can also help with this) and this will give you your UTR (unique taxpayer reference) number. We’ll also need your name, National Insurance number, your legal business/trading name and contact details. Once registered with CIS one of the immediate benefits will be that you’ll then have tax deductions made at the 20% rate rather than at 30%, which would otherwise be the case. If your business is a legal partnership you will also need to register it for CIS but this would need to be done in addition to being registered as an individual or sole trader. Of course, Taxfile can help with that too. Once you have been registered with CIS and have passed certain eligibility criteria, it is also possible to apply for ‘gross payment status’ meaning that you’ll then be paid by the contractor without the usual ‘at source’ deductions. Instead you’ll need to pay any outstanding tax and National Insurance at the financial year end; however HMRC will review your business each year to check that you still qualify for this status (paying tax late and/or submitting returns late would put your gross payment status at risk).

Offsetting Expenses against your tax

Taxfile can also help you to offset certain expenses against your subcontractor income. This means that any tax refund will be larger — or any tax outstanding will be lower. We can offset Read more

Taxfile Autumn Newsletter Now Available

Taxfile Newsletter Autumn 2014Download our jam-packed Autumn Newsletter right here for up-to-the-minute news, ways to save money, tips, new developments and tax information from Taxfile. Includes important news regarding tax return deadlines, refunds for C.I.S. sub-contractors working in the construction industry, key dates, ways to save money, HMRC tax news for landlords, imminent price changes plus an interesting mind map showing information about our lovely multi-lingual staff! Download the newsletter here (Acrobat PDF format – right-click to save the PDF to your hard drive then open it in Acrobat Reader or alternatively left-click the link to view the newsletter directly in most browsers).