Those numbers do not work out - are you saying that your total debts are £38,000, or that this is the amount you will pay into your IVA over a five year period? Either way I can't get that to make 38p in the £. Please clarify the exact terms of your IVA.
Assuming that you are paying £488 for 60 months, and have already paid for 5 months, I would say that a lump sum of £25,000 represents a very fair offer, but I would suggest that you leave it until the end of the first year before you try varying the IVA.
Regards, Melanie Giles, Insolvency Practitioner for over 20 years.
For further details contact me at
http://www.melaniegiles.com and view my IVA blog at:
http://melaniegiles.blogs.iva.co.uk