Hi Sally and welcome to the forum. I presume your question relates to how much you pay in an IVA?
The minimum return that creditors will generally accept is 25p in the pound, but the idea of an IVA is that you pay as much as you can afford to your creditors.
If you were to receive a bonus at work you would normally have to pay 50% into the IVA, and the rest would be yours to keep. However, that would depend on the conditions of your IVA so you would need to check.
Regarding a windfall - most IVA's contain a clause that the whole of a windfall must be paid into the IVA, up to the total amount of your original debt, and in some cases including statutory interest at 8% per annum, although again this would depend on the modifications in your IVA. Anything left over after the full debt had been paid would be yours to keep.
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