The accepted wisdom is that as soon as you retire in Australia and are over 60 years old, or as soon as you hit 65 years old even if you are still working you should shift your superannuation from accumulation to pension mode. You can transfer up to $1.9 million per fund member into pension mode currently. Investments in pension mode have zero tax. This is in comparison to 15% tax in accumulation mode with a 1/3 reduction for long-term capital gains.
But what if you have a lot of investments outside of superannuation? These are highly taxed and so doesn't it make sense to run these investments down first to reduce your overall tax? In pension mode there are required minimum withdrawals each year. If you don't spend that money it is simply added to your highly taxed non-super investments. So, despite not having to pay tax on your money in super, you are transferring more and more money out of super into your taxable accounts. Does it make sense to wait till you have spent your non-super investments?
I ran a simulation in my long-term projection spreadsheet. This isn't a Monte Carlo simulation. I just assume my historical average rate of return over the last 20 years applies into the future. I assume that I retire at age 65 and convert my super to a pension and Moominmama converts her super to a pension at age 60. She stops working when I do. I also assume that the tax rate on investments outside super is 20% of returns (without any attempt to define realised and unrealised gains) and in super in accumulation mode is 12.5%. Both are probably at the high end of what might actually happen. But the contrast with zero tax in pension mode, makes pension mode more attractive relative to accumulation mode. The simulation runs to 2050.
I also run a simulation where all our super stays in accumulation mode. This no pension scenario has 8% more assets in 2050 than the pension scenario.
This modelling is still not that realistic. I assume that all our superannuation can be moved to pension mode, even if we exceed the $1.9 million threshold. Also, we are likely to make more non-concessional contributions to Moominmama's account before 2029 and I assume we don't. I'm think that these tweaks won't change the fundamental result. We would have to have a lot less non-super investments to change the conclusions.