An independent report into the pension freedoms commissioned by Labour before the general election will not be published until the end of 2015.
The findings of the pensions market study, being carried out by Cass Business School professor David Blake, were initially due to be unveiled in the summer.
However, Blake now says the report is likely to arrive at the end of 2015, although he denies this constitutes a delay.
He says: “There was no set deadline. Just a lot of material has flooded in during the last 12 months which needs to be carefully analysed.”
A Labour spokesman says: “[Shadow work and pensions secretary] Rachel Reeves takes a close interest in this work, but this is an external piece of work so we don’t decide when things are published.”
Reeves has been linked with a move to become shadow chancellor if Andy Burnham wins Labour’s leadership election in September.
However, Labour say a potential move for Reeves would not affect the Blake report.
A spokesman says: “Regardless of who is shadow secretary of state, the party thinks this is a hugely important piece of work, from the leader’s office right the way to the shadow pensions minister Lord Bradley.”
Launching the Blake report in May last year, Reeves said the market study would look at “how we can prevent the risk of retirement rip-offs, and ensure that everyone can have access to retirement products that helps them secure a stable income throughout their retirement”.