A Practical Guide to Making Tax Digital for CIS Subcontractors

Working as a CIS subcontractor can mean managing several responsibilities at once. Between completing jobs, travelling to sites, buying materials, and dealing with contractors, keeping financial records may not always feel like the first priority.

However, organised records are essential for tracking income, claiming legitimate expenses, and preparing for tax obligations. Making Tax Digital for Income Tax is changing how eligible sole traders report their information to HMRC, so creating a simple digital routine can help CIS subcontractors stay in control.

Understanding CIS and Your Records

The Construction Industry Scheme, usually called CIS, affects payments made by contractors to subcontractors for construction work. A contractor may deduct money from a subcontractor’s payments before paying them.

If deductions are made, the contractor must provide a payment and deduction statement. This should show key details, including the gross amount paid, any materials amount used to reduce the deduction, and the deduction itself. Keeping these statements safely is important because they can help you understand the tax already deducted from your earnings.

Alongside CIS statements, subcontractors should keep records of invoices, business expenses, receipts, and bank transactions. Maintaining these records throughout the year is easier than trying to find everything shortly before a tax deadline.

What Making Tax Digital Means for Subcontractors

Making Tax Digital for Income Tax requires eligible individuals to keep digital records and use compatible software to send updates to HMRC.

From 6 April 2026, it applies to individuals registered for Self Assessment with qualifying income above £50,000 from self-employment, property income, or both. Qualifying income is generally measured before expenses, so it is important to check turnover rather than only looking at profit.

Eligible individuals need to maintain digital records, submit quarterly updates, and complete their tax return through compatible software. The requirements may not affect every CIS subcontractor immediately, but digital record-keeping can still make it easier to manage finances and prepare for future obligations.

Why Digital Tools Can Make CIS Accounting Easier

CIS subcontractors often receive payments from more than one contractor and may have different expenses from one job to the next. A digital system can give you a clearer picture of what is coming in and going out.

Using MTD for Cis Subcontractors can help create a more organised approach to recording income, tracking expenses, and storing important information in one place.

Instead of relying on piles of paper receipts or a spreadsheet that is only updated occasionally, software can support regular financial habits. For example, you may be able to record expenses as they happen, create invoices, monitor payments, and review your estimated position throughout the year.

This does not replace the need to check your records carefully, but it can reduce the amount of admin left until the last minute.

Expenses to Keep Track Of

Every business is different, so only claim expenses that are genuinely allowable for your circumstances. A qualified accountant or tax adviser can help if you are unsure.

For CIS subcontractors, records may be needed for costs such as:

• Tools and equipment used for work
• Protective clothing and safety equipment
• Travel connected with business work
• Materials, where applicable
• Phone and internet costs used for business
• Insurance and professional fees
• Training that is relevant to the current trade

Keep receipts and supporting documents, even when you use digital software. Clear records make it easier to check information and answer questions if needed later.

Build a Weekly Record-Keeping Routine

The easiest way to stay organised is to deal with financial admin little and often. Set aside a short time each week to review payments and expenses.

A useful routine could include:

1. Uploading or photographing receipts after making a business purchase.
2. Checking that payments from contractors match your records.
3. Saving CIS payment and deduction statements.
4. Recording expenses in the correct category.
5. Reviewing unpaid invoices or expected payments.
6. Checking your income regularly against the Making Tax Digital threshold.

This approach can help you spot missing paperwork early and make tax reporting feel more manageable.

FAQ

Do CIS subcontractors need to use Making Tax Digital?

Not all CIS subcontractors will be required to use it straight away. From 6 April 2026, Making Tax Digital for Income Tax applies to eligible individuals with qualifying income above £50,000. Check current HMRC guidance for your specific position.

What is a CIS payment and deduction statement?

It is a statement provided by a contractor when CIS deductions have been made from a subcontractor’s payment. It records payment and deduction details that may be needed for tax records.

Should I keep receipts if I use accounting software?

Yes. Digital software can help organise records, but you should still keep receipts and supporting documents for business expenses and payments.

Can I use an accountant for my CIS tax records?

Yes. An accountant or tax adviser can help you understand your responsibilities, check allowable expenses, and prepare your tax information. Ensure that your chosen software works with their processes.

Conclusion

Digital record-keeping can help CIS subcontractors spend less time searching for paperwork and more time focusing on their trade. By saving CIS statements, tracking income and expenses regularly, and understanding Making Tax Digital requirements, subcontractors can be better prepared for tax reporting throughout the year.