National Insurance number
The National Insurance number is used as a reference number in the Pay As You Earn system, and also by the self-employed. It is also used in applications for Individual Savings Accounts (ISAs), to check that an individual has opened only one ISA in a tax year.
Social Security Scotland
Many aspects of social security will remain reserved to the United Kingdom Parliament, and will continue to be administered through the Department for Work and Pensions. These include: