Real time information (RTI) is the biggest change to the UK's PAYE system since its introduction.

Under this new system employers need to provide HM Revenue & Customs with details of payments made to employees together the tax and national insurance contributions deducted when or before the payments are made to the employee.

Since April 2013 the majority of employers, apart from some minor exceptions, have been required to provide details of payments made to employees when or before the payment is made. Companies with fewer than 50 employees have until April 2014 before having to operate RTI, in order to give them more time to prepare.[1]