Q.

I am a bit confused about stamp duty. If my husband owns an investment property in his name only for tax purposes but now wishes for me to be included as half owner, do we have to pay full stamp duty for me to be added to the title? As his wife am I able to be added with no cost?

It would be treated as a disposal and a purchase of a half share, capital gains tax (if applicable) and stamp duty will apply. You should also take advice from your accountant before you sign any documents because you do not want to put yourself in the position where the tax office considers the sole purpose of the transaction was to save tax.