This page explains how to report your self-employed income and how it is calculated for universal credit.

The surplus earnings rules apply whether you are employed or self-employed or both. The rules mean that excess earnings are carried forward from one assessment period to another if certain conditions are met. They are then treated as extra income in a later assessment period.

This part of the website explains how universal credit works if you are self-employed.

Your pay as an employee will usually affect the amount of your universal credit award. In most cases, information about your pay (as an employee) will be sent to DWP and DfC automatically from HMRC and this page looks at how that information is used and in which assessment period.

For universal credit, if you are an owner or director of a limited company you may be treated as though you are self-employed and the company income treated as your self-employed income. 

The benefit cap is a limit on the total amount of working age benefits that you can receive. If your universal credit is over the amount of your benefit cap, it might be reduced.