I would say do RSTU, then if you have balance, SRS. 1) You will definitely need to elect the CPF life payout, so might as well hit FRS first to ensure a good payout. 2) Once the medisave hits BHS, excess is channeled to SA unless SA is at FRS. When SA > FRS, the excess of medisave contributions go to OA, which you can use to build more buffer for the HDB. 3) Once you hit FRS, that would mean the amount in your OA can be withdrawn. This is the most important reason I am pushing this direction, because you can withdraw the excess from OA at 55, versus 62 for SRS (could be later in future). At 55, you could a) withdraw from OA to fund tertiary education for your kids, b) if no need, take the OA as a spare bank acct earning 2.5% for doing nothing, or... just enjoy life. 4) 50% of SRS withdrawals will be taxed. CPF built up balances attract no tax. 5) A lot of folks may not know how to invest properly using SRS. At 4%, the SA offer an interest rate that even the current dividend yield of STI etfs cannot match. It is very very very difficult to consistently beat risk free 4% over 10+ years.