360 day-year or 365 day-year - What is the big deal?

I have just been informed by my DBS Credit Card Statement that:-

"the basis of interest calculation will be revised FROM existing 360 day-year TO 365/366 day-year (in a leap year)"

I couldn't believe my eyes!!!!

That for once in my life, I am looking at an unilateral amendment to a service agreement that is in favour of customers.

So what is the big deal?

Allow me to illustrate with an example. Let us say I have a personal loan of $10,000 at 14% p.a. What is my interest expense for the month of August (a 31-day month) based on:-

a) 365 day-year and;

b) 360 day-year?

Answer

For a 365 day-year, my Aug's interest expense,

$10,000 x 14% x 31/365 = $118.90

For a 360 day-year, my Aug's interest expense,

$10,000 x 14% x 31/360 = $120.56

Based on DBS Bank's revision of its basis year, it has implicitly given me a discount of $1.65 per $10,000 loan per month (estimated).

If you multiply this by the billions of personal loans, credit card loans, car loans, property loans, travel loans, renovation loans etc etc etc, this would be (as I am not sure whether this is applicable to all DBS loans) a significant move by a leading bank in Singapore in the right direction ie. a fair deal to both the bank and its customers.

Cheers to DBS Bank!

P/S - Refer to http://anythingwithedgar.blogspot.com/2007/05/how-to-increase-your-companys.html for my earlier expression of displeasure.