If you complete form P85, you can stop paying the day you leave the UK. After that, providing you remain employed outside the UK for the remainder of that year AND the full tax year beyond that (Apr to Apr) then you will not have to pay any tax back.
eg. Leave UK in July 2013 complete P85, not liable for tax from the day you leave. You must however stay employed overseas until at least Apr 2015 (tax year Apr 2014-Apr2015) to ensure that you wont have to pay the tax on your earnings whilst you were overseas.
You are of course allowed to visit the UK during that period under the normal time restrictions (average 91 days in any year)
Further to my last,
If you complete form P85, you can stop paying the day you leave the UK. After that, providing you remain employed outside the UK for the remainder of that year AND the full tax year beyond that (Apr to Apr) then you will not have to pay any tax back.
eg. Leave UK in July 2013 complete P85, not liable for tax from the day you leave. You must however stay employed overseas until at least Apr 2015 (tax year Apr 2014-Apr2015) to ensure that you wont have to pay the tax on your earnings whilst you were overseas.
You are of course allowed to visit the UK during that period under the normal time restrictions (average 91 days in any year)