devilsadvocate wrote:For example, If you get paid $1k per week every Monday net into your bank account and your weekly loan repayments are $700 which are due for payment on the same day each week. I'm assuming their model will recommend that you make a payment of $100 per day every day of the week. However, I'm at a loss as to how this actually saves you interest, because if you pay the full $700 off your loan on the Monday, you'll be SAVING interest on $600 on Tuesday, $500 on Wednesday etc over what you'd be paying if you went to the daily repayment plan right down until the cycle starts the following week.
Assuming of course that your weekly payment happens at the start of each cycle. If it happens at the end, then paying daily will save you a marginal amount of interest.
An example:
Say you take out a 300K mortgage at 8.5% over 30 years, paying fortnightly. Interest is charged daily at the rate of 8.5/365 % per day.
If you pay $1063.20 each fortnight (on the 14th day, the 28th, 42nd, ...) it will take about 30 years to pay the bugger off, and cost you $527243 in interest.
However if you pay $1063.20/14 = $75.94 every day (on day 1, 2, 3, ...) then slightly less interest will be charged daily since the balance decreases with each computation. You'll end up paying only $521563 interest, a grand saving of $5680. The loan will be shortened by about 7 fortnights.
So yes, paying daily will save you a little compared with paying once (at the END of the cycle). However the amount of saving is likely to be negligible compared with the total interest paid over the life of the loan. Bottom line is it's a gimmick.