The Three Buckets Approach to Retirement Income: What It Actually Takes to Make It Work

The three-buckets framework is one of the most talked-about ideas in retirement planning and one of the most commonly misapplied. The concept is simple enough to sketch on a napkin, but the details that make it actually work for a 30-year retirement are where most people get into trouble.

What the Three Buckets Are Supposed to Do

Bucket one holds cash, usually one to two years of living expenses. Bucket two holds short-to-intermediate bonds or other stable income-producing assets, sized for roughly years three through seven. Bucket three holds equities, everything else, and is expected to do the real growth work over decades.

The logic is sound. When markets fall hard, you draw from bucket one instead of selling stocks at a loss. Bucket two replenishes bucket one over time. Bucket three grows in the background and eventually refills bucket two. You are, in effect, insulating yourself from selling equities at the worst possible moments, which is the core threat of sequence-of-returns risk. A 30% decline in year two of retirement does far more permanent damage than the same decline in year eighteen, because early withdrawals deplete capital before it can recover.

Where the Framework Breaks Down

The most common mistake is treating the bucket percentages as fixed and permanent. Ten percent in cash, thirty in bonds, sixty in equities sounds clean, but a mechanical split ignores two things: your actual spending rate and what the market is doing.

If equities have a strong three-year run, your equity bucket is now oversized relative to the others. That is a good problem, but it still requires a decision. Do you trim equities and refill bucket two proactively, or do you wait? The answer depends on your tax situation, your income sources, and how close you are to the next Social Security or RMD inflection point.

Refill rules are the actual operating instructions for the system. A reasonable rule: when equities are up meaningfully from purchase, harvest gains to refill bucket two. When equities are down, pause and draw from bucket one or two for as long as they can sustain you (often 18 to 36 months) before touching stocks. Rigid percentages cannot capture that judgment. Rules tied to market conditions can.

This is also where the Harvest stage of the Sporos Doctrine becomes concrete. Which bucket you draw from in any given year, and in what order across account types, has real tax consequences. Drawing from a pre-tax IRA in a low-income year may cost you less than you think. Drawing from a Roth in a high-income year costs you nothing. The buckets and the tax structure of those accounts have to be designed together, not in isolation.

What to Do This Week

Map your own three buckets on paper. List each account you own and assign it to a bucket. Then calculate how many months of spending bucket one currently covers. If the answer is less than 12 months, that is the first gap to close before retirement, regardless of what the equity markets are doing. Once the map exists, the refill rules become obvious.

The information provided is for educational purposes only and does not constitute investment, legal, or tax advice. Consult with qualified professionals for guidance specific to your situation.