Do CIS subcontractors have to file monthly returns?

Do CIS subcontractors have to file monthly returns? No. Contractors file monthly CIS returns, form CIS300, by the 19th. A subcontractor files a yearly tax return and, from 6 April 2027 or 2028 depending on income, Making Tax Digital quarterly updates. No. The CIS300 is the contractor's monthly return. A sole trader subcontractor reports CIS pay and deductions once a year, on the self-employment pages of the Self Assessment tax return. No. CIS returns are monthly. A contractor whose average monthly payments to HMRC are below £1,500 can pay quarterly instead, but CIS 340 says it must still send returns every month. No. They are summaries of your business income and expenses for the tax year so far, not tax returns and not CIS returns. HMRC adds your CIS deductions to your tax return after the year ends. Read the full answer, with every source, at rightotax.co.uk.