The Three Buckets Approach: A Retirement Portfolio Strategy in Singapore
Buckets do not eliminate risk. They buy you time, and time is often what stands between a bad year and a bad decision.
A retirement portfolio has two jobs to do at the same time: provide money for spending now, while keeping enough capital invested for the years ahead. The three buckets approach makes that distinction easier to see by separating money according to when it is likely to be needed.
Money required in the near term is held in cash or highly liquid assets. Money needed over the next several years can take somewhat more risk, while capital that may not be touched for a decade or more can remain invested for growth.
On paper, none of this is especially radical. In fact, one of the main criticisms of the bucket strategy is that it may not be structurally different from a single, properly allocated portfolio at all. That criticism matters because it shifts the question from whether buckets change the portfolio to whether they change investor behaviour.
Is the bucket strategy really different?
Suppose one retiree holds three labelled buckets containing cash, fixed income and equities, while another holds the same proportions of those assets in a single portfolio with no separate labels. Economically, the two portfolios may be almost identical. Calling them buckets does not create a higher expected return or reduce market risk if the underlying asset allocation remains the same.
The value of the approach may therefore lie less in the investment mechanics themselves and more in how the investor understands and behaves around the portfolio. A technically sound investment strategy can still produce a poor outcome if the investor abandons it during a difficult market. For a retiree who knows that the next few years of spending have already been set aside, it can be easier to leave long-term investments alone when markets fall.
Behaviour is not separate from the investment outcome. It is one of the conditions that allows the strategy to work as intended. This is also why the bucket approach sits naturally alongside goal-based investing: the labels help make visible the underlying discipline of matching money to purpose, time horizon and capacity for risk.
Why buying time matters in retirement
The need for that discipline becomes more important once withdrawals begin. One reason is sequence of returns risk. Poor market returns early in retirement can have a disproportionate effect when withdrawals are being made at the same time, because selling growth assets after a fall reduces the amount of capital left to participate in a later recovery.
A short-term reserve creates breathing room. If near-term spending is already funded, a bad year in the market does not automatically force the sale of long-term investments at an unfavourable time.
There is another risk that is harder to capture neatly in a spreadsheet: longevity. People often treat retirement like a problem sum. Pick an age, work out how much can be spent each year, and the numbers can be made to run neatly down to the last dollar. But retirement is lived in real time. What happens if the plan runs to age 90 and you live to 105? Or when you reach 80, 85 or 88 and can see the balance falling as that assumed end point gets closer?
The answer is not simply to push the planning age further out. A stronger plan needs enough flexibility, growth potential and liquidity to make a long retirement manageable without turning every passing year into a countdown against a fixed depletion date.
Buckets do not remove sequence risk or longevity risk. Their value is that they can give the retiree time to respond to both without forcing decisions at the worst possible moment.
The buckets do not have to be literal
The approach is often illustrated as three separate accounts, but that is not necessary. The same logic can sit inside one portfolio, provided the allocation reflects the different time horizons and enough liquidity exists for near-term spending.
What matters is whether the goals behind each pool of money remain clear enough to hold their ground against market noise. The more clearly a retiree understands what each part of the portfolio is for, the less reason there is for a bad month in the markets to change what happens to money that may not be needed for years.
Maintaining that perspective can be harder when it is your own money at stake. A retiree watching their portfolio fall must judge whether anything in the plan has changed while also experiencing the discomfort of the fall itself. That is where having the purpose of each pool of money, and the rules around it, agreed in advance becomes useful.
It is also where an adviser can add value. The adviser is not there simply to label the buckets or move money between them, but to help hold the reasoning together when markets make it harder for the investor to view their own finances dispassionately.
Decide how the buckets will be replenished
A short-term reserve eventually runs down, so replenishing it is part of the strategy rather than an administrative detail. The plan might use portfolio income, maturing fixed-income investments, gains from growth assets or a combination of sources. During weaker markets, it may make sense to delay selling equities and use other available liquidity instead.
Those decisions are better made before market conditions create pressure to act. A written Investment Policy Statement can set out the purpose of the portfolio, target allocation, liquidity requirements and the circumstances that should lead to a review or rebalance. The aim is not to predict the market, but to reduce the number of important decisions that have to be invented while markets are moving.
The portfolio still must work as a whole
A bucket framework does not compensate for poor portfolio construction. The balance between equities and fixed income still needs to reflect the investor's capacity for risk, while the amount held in cash has to make sense against actual spending needs and inflation.
Too much cash may feel reassuring but weaken the portfolio's ability to support a long retirement. Too much growth exposure can leave too little room to fund spending comfortably through a difficult market.
The better question is therefore not whether a retiree has three buckets. It is whether the portfolio is structured around real spending needs, real time horizons and a level of risk the investor can live with through both a bad market and a long life. This is the same discipline behind goal-based investing: the goals and time horizons underneath the buckets are the strategy. The buckets make that strategy easier to live with.
We’d welcome a conversation
If you are approaching retirement, our Wealth Management Process starts with a Discovery. We look at the income you will need, the assets already available and the amount of risk the portfolio can reasonably carry, then structure the plan around both the numbers and the years ahead.
One role of an adviser is to help preserve that discipline when markets become difficult and it is understandably harder to view your own finances dispassionately. That includes helping to apply the rules for spending, replenishment and rebalancing that were agreed before the noise began.
Questions people often ask
Do I need three separate accounts to use this approach?
No. What matters is whether the underlying allocation reflects the different time horizons and whether near-term spending has enough liquidity behind it.
Is the bucket strategy better than a single retirement portfolio?
Not necessarily. If both approaches hold the same overall mix of assets, the underlying exposure may be very similar. The bucket structure can still be useful if it helps the investor stay with the plan through difficult markets.
How much should I keep in the short-term bucket?
There is no fixed number. It depends on expected spending, other reliable income and how much flexibility you have during a downturn.
How often should the buckets be refilled?
That should be decided as part of the plan rather than in reaction to markets. The right frequency depends on the portfolio and the rules chosen for withdrawals and rebalancing.
