from chatgpt
For
CIMB Bank FastSaver, with:
- S$500,000 deposited in July
- $0 balance on 30 June (so full $500k counts as incremental)
- Normal / Personal Banking (bonus = 0.70%)
Here’s the calculation:
1) Prevailing interest (FastSaver tiers)
From your promo sheet:
- First $25k @ 0.50%
- Next $25k @ 1.08%
- Next $25k @ 1.58%
- Above $75k @ 0.50%
For $500k:
- First $25k → $10.62
- Next $25k → $22.93
- Next $25k → $33.53
- Remaining $425k → $180.48
Total prevailing interest =
~$247.56
2) Bonus interest (0.70%)
Bonus applies on full incremental balance.
500,000×0.007×31365500,000 \times 0.007 \times \frac{31}{365}500,000×0.007×36531
=
~$297.26
Total July earnings
$247.56 + $297.26 = ~$544.82
So if you park
$500k for the whole of July, expect about
$545 total.
One important note:
FastSaver’s base rate after $75k drops to only
0.50%, so for large sums like $500k,
StarSaver usually pays much more (about
$813 total for the same amount). FastSaver is better for smaller balances.