Mulligan, an amputee and former computer technician, met Ms McGregor on an internet dating site.
Ministry of Justice legal aid services director Michele McCreadie said the total legal aid provided for the defence of Mulligan at his trial was $84,323.
Mulligan, who was represented at trial by Wanganui lawyer Stephen Ross, has since changed counsel and is now represented by New Plymouth-based lawyer Julian Hannam.
A hearing date for his appeal has not yet been set.
Ms McCreadie confirmed that legal aid would be provided for Mulligan during his appeal and details would be available once the proceedings were finished.