1© 2008 Fair Isaac Corporation. Confidential.

Reconciliation of Guidance(In millions) RevenuePrior Revenue Guidance 425$ Less Disc Ops (20)$

405$

Reduction in Guided Revenue (25)$ Current 2H 08 Guidance 380$

Share Count 51,350

Prior EPS Guidance (Continuing Operations) 1.87$ Less:

Impact from lower revenue, after tax (0.34)$ Revised Expense run rate, after tax (0.17)$

(Development, Marketing, Int'l Sales)Net Interest Expense, after tax (0.06)$

Add:Net RfG impact, after tax 0.18$ Impact from lower share count 0.02$

Revised Guidance 1.51$