if he didn't top up the 5K on 31 Dec 2024 and waited just 1 more day, then he would quality for the Jan 2025 promo which covers Jan Feb and March. In this case, the BI would be credited on 30 April 2025
But because he topped up on 31 Dec 2024, CIMB treated it as registering for the Dec 2024 promo which covers Dec Jan and Feb and credits the BI on 31 March 2025.
IMO, It's not a mistake on your part. To me, you probably just didn't really understood the promo mechanics.
Not the bank fault as well, since the 5K was credited on 31 Dec 2024, to them it is saying loudly saying
"I want to join dec 2024 promo last minute"
All i can say is to read through the TnC Point 10 - Illustration. The crucial point is that CIMB looks at end of day balance.
If you wish to calculate, then you must break down to each day, something like this. For your case, you must have a T4 Base and T4 bonus because your value exceeded 75K
| Day | Balance | T1 Base | T1 Bonus | T2 Base | T2 Bonus | T3 Base |
1 | 60332.23 | 0.8150685 | 1.3767123 | 1.5 | 0.6917808 | 0.9341468 |
2 | 60332.23 | 0.8150685 | 1.3767123 | 1.5 | 0.6917808 | 0.9341468 |
3 | 60332.23 | 0.8150685 | 1.3767123 | 1.5 | 0.6917808 | 0.9341468 |
4 | 60332.23 | 0.8150685 | 1.3767123 | 1.5 | 0.6917808 | 0.9341468 |
5 | 60332.23 | 0.8150685 | 1.3767123 | 1.5 | 0.6917808 | 0.9341468 |
Yes, those were my values from the last promo... kinda lazy to mask it. I always zero out before i join their promo so i just used the entire balance for Bonus calculation.