A radical new approach to government accounting that would require the US administration to account for the cost of future social security payments year by year as people build up entitlements will be proposed on Monday.

The proposal by the federal accounting standards advisory board (FASAB) – which would also require the government to account for benefits accrued under Medicare and other social insurance programmes in the same way – is unprecedented internationally. It would radically change the presentation of US government finances, in effect bringing forward the cost of rapidly increasing social security and Medicare obligations and greatly increasing the reported fiscal deficit.