Government Gateway: sign in or set up To access this service for the first time you'll need: a Government Gateway account - if you don't already have one, you can set one up by using this service your National Insurance number access to a mobile phone or landline details of one or more of the following - your UK Passport, tax credits, P60 or a recent payslip It will take about 5 minutes to set up. If you already have a Government Gateway account you can sign in using your existing login details.