Bruce, 25, was all set to join the Blades earlier this week when the move collapsed because the two clubs could not agree how the £200,000 fee should be paid.
Marching on: Alex Bruce is set to sign for Leeds United after his move from Ipswich to Sheffield United fell through
That alerted Leeds boss Simon Grayson and he quickly agreed a similar fee with the Tractor Boys, rising to £300,000 based on appearances.
The Republic of Ireland international defender, who played 127 games in four years at Portman Road after signing on a free transfer from Birmingham, is set to undergo a medical on Thursday morning and then complete the necessary paperwork.
Caught out: Ipswich may be forced to look for an alternative to top goalkeeper target Marton Fulop
Meanwhile, Ipswich may have to turn their search for a goalkeeper elsewhere because a deal for Hungarian international Marton Fulop is close to collapsing.
Sunderland accepted a £750,000 bid from the Tractor Boys but the personal terms on offer are quite a way short of what Fulop wants.
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Source: Daily Mail
Source: Daily Mail