Revenue have issued guidance on adjusting the VAT deductible amount on your VAT returns where consideration is unpaid after six months.

In brief, if you have not paid (or only part-paid) a supplier invoice within six months, you must adjust your next VAT return as the unpaid portion of the VAT is no longer claimable until it is eventually paid.

That guidance may be found here http://www.revenue.ie/en/practitioner/ebrief/2014/no-552014.html

If you have any queries on this matter, please do not hesitate to contact Kelly Murray at 091 758282.