There is no deadline for the mocks but its better if you give mocks within the given window so that you get a effective national ranking and percentiles.

Phase Mock Number Launch date
Phase 1 CAT Mock 1 15th April
Phase 1 CAT Mock 2 15th May
Phase 1 CAT Mock 3  15th June
Phase 2 CAT Mock 4  1st July
Phase 2 CAT Mock 5  15th July
Phase 2 CAT Mock 6  1st August
Phase 2 CAT Mock 7  15th August
Phase 3 CAT Mock 8  1st Sept
Phase 3 CAT Mock 9  15th sept
Phase 3 CAT Mock 10  1st Oct
Phase 3 CAT Mock 11  15th Oct
Phase 3 CAT Mock 12  1st Nov
Phase 3 CAT Mock 13  7th Nov
Phase 3 CAT Mock 14  13th Nov
Phase 3 CAT Mock 15  20th Nov

 

Schedule for CET mocks – Coming soon (from December 15)
Schedule for XAT mocks – Coming soon (from December 15)
Schedule for SNAP mocks – Coming soon (from Sept 15)
Schedule for NMAT mocks – Coming soon (from Sept 15)
Schedule for IIFT mocks – Coming soon (from Sept 15)