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 debate in the United States
Social Security is funded through the Federal Insurance Contributions Act tax (FICA), a payroll tax. Employers and employees are each responsible for making tax payments of 6.2% of wages in 2018 (12.4% total) as FICA contributions, typically withdrawn from paychecks. Non-employee contractors are responsible for the entire 12.4%. During 2018, Social Security taxes were levied on the first $128,400 of income for employment; amounts earned above that are not taxed. Covered workers are eligible for retirement and disability benefits. If a covered worker dies, his or her spouse and children may receive survivors' benefits. Social Security accounts are not the property of their beneficiary and are used solely to determine benefit levels. Social Security funds are not invested on behalf of beneficiaries. Instead, current tax receipts are used to pay current benefits (the system known as "pay-as-you-go"), as is typical of some insurance and defined-benefit plans.