The step-by-step calculation of the cash equivalent of a beneficial loan using the precise method (see EIM26230) is set out in Section 183(3) as follows.
For each day when the loan was outstanding find the maximum amount of the loan and multiply this by the official rate of interest for that day.
Add together each of the amounts from step 1.
Divide the result of step 2 by the number of days when the loan
was outstanding.
Finally, deduct from the result of step 3 any interest paid
on the loan.
The above steps are set out in a formula at
EIM26235.
See
EIM26300 for a list of examples showing
the precise method of working out the cash equivalent of a
beneficial loan.