Usually normal FD are supposed to pay the interest at the end of tenor on maturity. However some banks have monthly interest payments as an option which you must choose during placement of the FD, subject to certain conditions.
For example, Bank Rakyat requires at least 5k and longer than 6 months, and an a account to credit the interest automatically each month.
Ambank also offers monthly interest for senior depositors. Other banks may offer monthly interest but usually specific to a particular promotion such as HongLeong current offer for seniors.
Usually the banks allow a senior to have a joint account with a younger person/s.
To avoid any confusion, place your FD not later than the 28th of the month, then the interest will always creditted on the same day each month.
Some banks calculate based on 29/365 when a leap month occurs, and 28/365, 30/365 or 31/365 for other months..
Some other banks eg Maybank, will take into consideration leap month and use 366 as divisor.
Alliance Bank however, will divide the total interest due by number of months (promo over).
All the banks will make adjustments to the interest paid due to rounding error for each month.
To avoid confusion, you may place a multiple of RM 365 such as RM 3,650, RM 7,300, RM 365,000.
Depending on the promotion, interest can also be paid upfront, at end of each step, quarterly, halfyearly, yearly or on maturity besides monthly.
It is highly advisable to clarify the interest payment on each placement to avoid unpleasant mistakes.
Btw, currently there are two HongLeong Bank 6 months FD promo gives monthly interest: