At the moment, Australians can contribute up to $A180k per year to superannuation from after tax money on top of up to $A35k (if over 50) from pre-tax income. This seems like a crazy high limit and has no analogue in the US retirement system, for example. There is now a lot of talk about lifetime caps on super contributions. An easy way to do this would be to cut or eliminate this post-tax contribution limit. I had thought about making post-tax contributions starting in about 5 years time (when I would be about 55) and up to retirement. In the meantime, the plan was to build up our offset account and then pay down and redraw the mortgage. But now I am thinking that government might eliminate the post-tax option, I am wondering whether it would make sense to make these contributions sooner.
The gain from adding post-tax money to super is the tax-free earnings on the money after retiring. However, at least at the moment investment taxes are lower than regular income taxes and so we are talking about avoiding an 10% (after franking dividend tax in 38% bracket) to 23.5% (long-term capital gains tax in 45% bracket) tax starting 10 to 15 years in the future. Let's say the super investments make an 8% return, then the extra yield from avoiding tax by investing in super rather than non-super investments is about 1.3% per year. And this won't start to 10-15 years out and it is uncertain that the opportunity will go away and stop us doing that a few years later.
In the meantime the offset account is earning 4.55% tax free virtual interest with perfect certainty. A superannuation account would probably earn that after tax in the next 10-15 years, but there is a lot of uncertainty about that and the money is locked up for the next 9 years.
Is the answer to diversify and do some of both strategies?