If you are single you are classed as a pensioner once you have reached the qualifying age for Pension Credit*.
If you are part of a couple**, you are classed as a pensioner if you have both reached the qualifying age for Pension Credit*.
If you are part of a couple and only one of you have reached the qualifying age for Pension Credit in most cases this will mean you may need to claim Universal Credit. However, couples who are already claiming Housing Benefit or Pension Credit as at 14/05/2019, may be able to stay on Housing Benefit and Pension Credit, and in some cases may be able to make a new claim for Housing Benefit or Pension Credit.
*The qualifying age for pension credit is the age that you first qualify for your state pension.
**You are part of a couple if you live with your partner. A partner is someone you are married to or have a civil partnership with, or a person you live with as if you were their husband, wife or civil partner.
To see when you (or your partner if you have one) reach(ed) the qualifying age for Pension Credit, please use the Pension Age Calculator in the 'Related links' area of this page.