QUOTE (Nathan @ Dec 16 2007, 12:56 PM)

ah right, so, the interest rate, effectively, is nearer (5.5/12 x 3) 1.4%
i get it.
how much of an effect is this bacs transfer sting?
If, say, you have £100,000 in an account earning 6% and you transfer it to another account earning 7% for 3 months only, the difference is 1%PA for 3 months which is £333.33. However, your money is in "limbo" for 4 days during the transfer period, so you are losing 6%PA for 4 days, which is £6,000 / 365 x 4 = £65.75, so your gain for the 3 months is £333 - £65.75 = £267, then you lose about £70 when you transfer it back, so your £333 gain becomes only £200.
Edit: Actually, it's four
working days, so if you forget about a weekend and make the transfer on a wednesday, thursday or friday, it could be six days in each direction, reducing your gain to about £130

.