OK boss bbgoat, I checked mine already. For my case lar, dunno about urs, I was given 4.5% in May based on 366 days on the dot ie calculations to the dot.
For Jan 2016, I got 4%. But the base was using both 365 days and 366 days
because I placed the deposit on 25th of the month ie 6 days for 26/12/2015 to 31/12 on 365 days base and 1/1/2016 to 25/1/2016 on 366 days base. The calculation was out by 1 sen only this time.
Up to you lar. If you happy, thenÂ

 Else, you can check calculations like I did.
Then again, different branch may work differently... heaven knows how Maybank actually work. Also I haven't checked if they gave me any credit in June

btw, your 15 for 31 days in may at 0.5% interest diff tells me that your principal is about 35big ones, right? If correct, then your branch actually did not change to 4.5% in 7th month. Mine did. Which tells me that is driven by branch

If you want, can PM me your start date, principal and what u actually got credited for Jan 2016 & I can do the calculations for you

Bro, u miss out post talking about this issue few weeks back. The 7th mth 4.5% issue is NOT related to branch. One other forummer who has more than 1 placement on the same day said one of the placement on the 7th mth received 4.5% while another one received 4%. It is due to the coding error that the counter done wrongly in the MBB system.
As I said MBB has acknowledeged their error. Groups of people from my branch affected but probably some or most do not know unless they do the calculation and check the monthly interest.
The amount I placed is RM37k.
Thanks for your offer. I have been calculating the monthly interest exact to the last 3 digit of decimal points.