Junior Saver: 4.5%
Neopian Student: 5.5%
Bronze Saver: 6%
Silver Saver: 6.5%
Super Gold Plus: 7%
Platinum Extra: 7.5%
Double Platinum: 8%
Triple Platinum: 8.5%
Diamond Deposit: 9%
Diamond Deposit Plus: 9.5%
Diamond Deposit Gold: 10%
Millionaire Platinum: 10.5%
Millionaire Double Platinum:11%
Millionaire Mega-Platinum: 11.5%
Neopian Mega-Riches: 12%
Ultimate Riches!: 12.5%
To figure out how many neopoints you'll get for a daily interest, use the following steps:
P% multplied by CB = YI
YI divided by 365 = I
Here's the key:
P% = Percentage of interest rate
CB = Current Balace
YI = Yearly Interest
I = Interest
Problems/Confusion
If you get a decimal (which is very likely) then simply round off. If the first number after the decimal is 5 or above, then round up one number. Round down a number if the number after the decimal is 4 or below. (This formula may not be entirely accurate, and if it's a leap year then change 365 to 366.)
STILL a bit fuzzy? Look at this example:
9% (equal to .09) multiplied by 218,054 = 19,624
19,624 divided by 365 = 53.76673973
Round 53.76673973 to 54 (because the 7 is above 5). That's my interest rate!