What is NEST? It stands for National Employment Savings Trust - the new name for the workplace pension scheme which will be introduced in October 2012.
But some people working for very small companies will not be enrolled until February 2016.
So what is the cost of the delay for someone with no other pension arrangements?
Paul Lewis runs through the calculations with actuary David Cule from Punter Southall.
This item was first broadcast on Radio 4's Money Box on Saturday, 23 January 2009