As part of its reforms, Mr Shorten outlined that Labor would introduce a minimum 30 per cent tax rate for discretionary trust distributions to adults.

More recently, Shadow Treasurer Chris Bowen confirmed that Labor would still be proceeding with its proposal if elected at the next election.

Labor has clarified, however, that the tax will not apply to certain categories or trusts including fixed trusts.

Consequently, some SMSF trustees who invest in private unit trusts may look to change the structure of the trust so that it meets the definition of a fixed trust, DBA Lawyers director Daniel Butler explained.

However, in the process of doing this, they may be hit with a range of unintended tax consequences, Mr Butler warned in a recent webinar.

“If you don’t have the right trust and you now seek to make it fixed, you’re in a land of big controversy. The state revenue offices of each of the eight states and territories may be at you to get stamp duty on any dutiable property held within that trust,” he cautioned.

“That is a big issue, that is very murky law. Each state and territories have their own murkiness about what is broadly known as resettlement.”

Potential issues relating to capital gains tax could also arise, he said, although this may be more manageable.

“You’ve also got potential land tax issues. If you’re in NSW and you don’t have a very strict definition of fixed trust, which is far stricter than Schedule 2F of the 1936 Tax Act, then you won’t get the benefit of the land tax threshold, and you could pay somewhere in the order of $7,500 more in land tax per annum on that property,” he said.

“There are also other potential implications. You’ve got to get the unit trust deed done from the get-go; otherwise, if you try to change it and make it a fixed trust down the track, that can be problematic.”