Tax, VAT & MTD

What has to be reported, when, and what Making Tax Digital changes.

These answers provide general information, not advice tailored to your circumstances. Rules can change and exceptions may apply — speak to the CASS team before making a tax, accounting or financial decision.

First check that the working arrangement is genuinely self-employed. Where verification is required, use HMRC’s CIS service with the subcontractor’s correct business and tax details. HMRC confirms the applicable deduction treatment and provides a verification reference. Keep the result and supporting records. A new subcontractor usually needs verification, and previously used subcontractors may need it again depending on when they last appeared on your returns.

Reviewed by Paul Barnes, Founder · Last reviewed 2 October 2026

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