You can claim your State Pension when you reach State Pension age. State Pension age is different for men and women (but this is changing) and depends on your date of birth. You can check when you will reach State Pension age on the gov.uk website:
https://www.gov.uk/calculate-state-pension
For those who reach State Pension age from 6th April 2016 onwards there is a new State Pension.
The new rules affect men born on or after 6th April 1951 and women born on or after 6th April 1953.
If you reached State Pension age before 6th April 2016, your State Pension will be calculated based on the old rules.
What are the differences between the old and new State Pension schemes?
Under the old State Retirement Pension scheme rules, your State Pension can be made up of:
a basic State Pension, based on your National Insurance record and
for some people, an earnings-related additional State Pension (also referred to as state second pension or SERPS).
The new State Pension is simpler because it is a flat-rate pension, based on your National Insurance (NI) record alone; not based on earnings.
The number of qualifying years on your NI record you need to get the maximum new State Pension is 35. Under the old scheme you needed 30 years. You need a minimum of 10 qualifying years to be entitled to any new State Pension.
You pay NI contributions when you work and earn over a certain amount and you can be ‘credited’ with NI contributions when you are unemployed, or cannot work due to illness or disability, or you are a carer or you get Child Benefit for a child under 12 (or under 16 before 2010).
The new State Pension is an individual entitlement, this means that in general you will not be able to claim on your spouse or civil partner’s contributions at retirement or if you are widowed or divorced.
For more information on the new State Pension you can visit the gov.uk website: https://www.gov.uk/new-state-pension