This is the monthly pricing for IRIS Openbooks
5 clients £75
10 clients £145 increase £70
20 clients £280 increase £135
30 clients £420 increase £140
50 clients £675 increase £255
75 clients £1,012.33 increase £337.33
100 clients £1,300 increase £287.67
150 clients £1,800 increase £500
While the average price seems reasonable the marginal cost of one extra client is incredible high. If you have 150 clients signed up and you get one more they will cost you £500 per month.
At small levels the prices are equally bizarre. You have five clients costing an average of £15 each but your 6th client will cost you £70.
I pointed this out to an IRIS salesman today and he confirmed this was how the pricing worked. I had previously been under the impression that the prices were just examples at different quantities but I was told these are the bands.
Either the IRIS salesman has got it wrong or IRIS have priced themselves out of the market.