The Army currently owe me approx Â£600 and the problem appears to be ongoing. About 5 months ago the system failed to give me a payrise on promotion. There is no disagreement about the entitlement but it just appears to be all too difficult to recify. Now, I'm not whinging and I dont mind lending the Army the money, but I do feel I should be entitled to charge interest at the same rate as a bank would charge me. Do any pay gurus out there know if it is laid down in writing anywhere that I can claim interest on monies owed?