As you consider how much to fund your CPF Retirement Account (which then feeds into your CPF LIFE pension) you might wish to consider the experiences of other retired people in other countries.
Many American retirees often rely solely or primarily on U.S. Social Security retirement income. They routinely and vocally complain about how difficult it is to live on Social Security. According to the Pension Rights Center, in 2024 the median Social Security retirement benefit was about US$1,710 per month (2024 U.S. dollars), currently equivalent to about S$2,185 per month. Social Security payouts are adjusted annually for inflation with a "hold harmless" provision (no decrease in deflationary periods).
For comparison, if you celebrate your 55th birthday in 2026, fund your CPF RA to the Full Retirement Sum (S$220,400), and don't make any RA withdrawals, you should receive a CPF LIFE Standard Plan payout of S$1,780 per month (2036 Singapore dollars) from age 65. That 2036 payout is about S$400 below the median U.S. benefit from 2024, and with no inflation adjustments. That's a lot lower!
Are American retirees wrong? Is the median retiree's Social Security benefit too lavish, too luxurious? I seriously doubt it! You might have a different idea about how much foundational lifetime real retirement income you ought to nail down. However, if your first planning instinct is to reduce your RA below the Full Retirement Sum, I'm likely to question your financial acumen. Maybe, once you actually reach age 58 (as an example), and a qualified doctor says you have only 2 years left to live, OK, spend some RA dollars if you want. That makes sense. Otherwise, when you make a reasonable retirement financial plan, you'd much rather have "too much" pension income than too little. And CPF doesn't really allow you to have too much pension income because there's an Enhanced Retirement Sum limit.
If you really want to try to justify why American retirees need more pension income than similarly situated Singaporeans need, consider these facts: on average they pay less for electricity, less for food at home, less for unreimbursed acute elder healthcare and prescription drugs, less for medical insurance premiums (in middle to high retired ages anyway), and less for housing. On average they have less longevity risk (they don't live as long as Singaporeans), and on average they have more chlidren and grandchildren (who might financially support them).
Don't fool around with this one! Simply nail down at least a decent pension, and also for your spouse/partner. The government has a great deal on offer.