The revised auto-enrolment implementation schedule will net the government £380m in reduced tax relief on pension contributions, according to budget documents.
Chancellor George Osborne will make "no significant" changes to higher-rate tax relief.
The 50p top rate of income tax will be reduced to 45p from April next year, Chancellor George Osborne announced this afternoon.
Two multi-billion pound public sector pension schemes are among investors to have submitted proposals to the Treasury to take on riskier 'greenfield' infrastructure investments.
Chancellor George Osborne has confirmed that the government will push ahead with reforms to the state pension but said age-related personal allowances will be scrapped.
Dan Jones looks at the precedents for 'super bonds'
Treasury plans for perpetual gilts and ultra-long gilts with more than 50 years' maturity will fail to attract pension scheme demand, industry figures say.
The Office for Budget Responsibility has revised up its forecast for UK economic growth for 2012 but has cut it for 2013, and said the economy will escape recession.
The government will publish proposals on increasing the state pension age automatically this summer.
Chancellor George Osborne has confirmed that Royal Mail Pension Plan Assets to be transferred to the Treasury will be used to pay off government debt.