One can now invest your money in the Supplementary Retirement Scheme (SRS) account with StashAway as seen here - Take your SRS funds further. If you are not familiar with SRS, I suggest reading up more first (Kyith from InvestmentMoats recently blogged about it - I Spent $1 to Open a SRS Account to Fix the Withdrawal Age). Generally, it is more beneficial for people with a higher tax bracket.
The statutory retirement age is currently at 62 and one can make withdrawals over the next 10 years after the first penalty-free withdrawal where only 50% of the withdrawal amount will be subjected tax. Based on the current income tax rates, the magic number - $400,000 would not be taxable then if one were to withdraw $40,000 every year over 10 years. What's the caveat? It is a long time (34 years for us) and the policies/tax rates may change, and most importantly, would you...