To get the full new state pension, someone may need 35 years of National Insurance contributions on their record.
They will need at least 10 years to get any state pension at all.
The forecast can tell someone if they have any gaps in their National Insurance record which could deny them the full state pension, and if so, how they could potentially fill them to earn more state pension entitlement.
Other ways to apply
The Government has advised that applying online is the quickest way to get a forecast, but there are other options as well.