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OK, let's make these assumptions:
$0 initial savings
both of you are ~28 years old
both of you will retire at ~63 years old (+35 years)
$3,500/month desired retirement income (2020 dollars)
3%/year average real yield on your long-term savings, net of all costs
3%/year safe withdrawal rate in retirement, as applied to the first year
With those assumptions, you'll need $42,000/year (2020 dollars) in retirement. Take $42,000, divide by 3%, and you get $1.4 million (2020 dollars) as your target goal.
OK, now you figure out what the initial monthly savings amount is (still 2020 dollars) at 3%/year average yield over 35 years. And the answer is about $1,380, or $690 per person. (Many online calculators can help you figure that out.)
Before you panic, bear in mind that while you're age 35 or under 6/37ths of your compulsory CPF contributions are going into your Special Account. That works out to $300/month/person if your gross wages are $5,000/month, for example. Add $390/month/person, and you're on pace in 2020, with these particular assumptions. One critical assumption is that you stay at or above real dollar pace, meaning that your savings flow increases every year at least to keep pace with inflation.
Your CPF Special Account currently earns at least 4%/year nominal interest, which is currently at or above 3%/year real interest since Singapore dollar inflation is currently quite low. However, that probably won't always be true, so some long-term, low cost, well diversified stock index fund investing is merited to try to keep your average real yield at or above the 3% assumed.
You can run the numbers using different assumptions if you like. For example, what happens when you work and save for 38 years instead of 35? And so forth.
$0 initial savings
both of you are ~28 years old
both of you will retire at ~63 years old (+35 years)
$3,500/month desired retirement income (2020 dollars)
3%/year average real yield on your long-term savings, net of all costs
3%/year safe withdrawal rate in retirement, as applied to the first year
With those assumptions, you'll need $42,000/year (2020 dollars) in retirement. Take $42,000, divide by 3%, and you get $1.4 million (2020 dollars) as your target goal.
OK, now you figure out what the initial monthly savings amount is (still 2020 dollars) at 3%/year average yield over 35 years. And the answer is about $1,380, or $690 per person. (Many online calculators can help you figure that out.)
Before you panic, bear in mind that while you're age 35 or under 6/37ths of your compulsory CPF contributions are going into your Special Account. That works out to $300/month/person if your gross wages are $5,000/month, for example. Add $390/month/person, and you're on pace in 2020, with these particular assumptions. One critical assumption is that you stay at or above real dollar pace, meaning that your savings flow increases every year at least to keep pace with inflation.
Your CPF Special Account currently earns at least 4%/year nominal interest, which is currently at or above 3%/year real interest since Singapore dollar inflation is currently quite low. However, that probably won't always be true, so some long-term, low cost, well diversified stock index fund investing is merited to try to keep your average real yield at or above the 3% assumed.
You can run the numbers using different assumptions if you like. For example, what happens when you work and save for 38 years instead of 35? And so forth.