All sums of money payable for compensation awarded under Payment of :

All sums of money payable for compensation awarded under this Chapter shall become due three months after the final award is made, and simple interest at the rate as may be prescribed but not less than five percentum per annum shall be allowed on any such sum remaining unpaid after the said three months, except when the non-payment of such sum is caused by the neglect or refusal of the claimant to apply for or received the same.