Bucket Strategy for Retirement: Does It Work?
Quick answer: A bucket strategy sorts retirement money into compartments by when it will be spent: a cash reserve for the next year or two, then steadier assets, then growth assets for later. We ran a simple version through the same simulated markets as a plain 60/40 mix. In that test the reserve made little measurable difference to the success rate, and in one case the result came out lower. That is a statement about this model and its simplifications, not a verdict on the idea. What a reserve changes is mostly the experience of drawing money in a downturn, which a success rate does not measure.
Education, not financial advice. This page explains a method and shows what a model produced from stated assumptions. It does not tell you what to buy, sell, save or spend. For your own situation, ask a qualified professional.
The idea in plain terms
Imagine three jars. One holds cash, enough for the next stretch of spending. One holds something steadier than stocks, such as bonds. The last holds the stocks. Each year you spend from the cash jar. When markets have done well, you refill it from the others; when they have not, you leave the stocks alone and let the cash jar run down instead.
That is the whole appeal. A person who has just watched the market fall sharply would rather not sell shares to pay this month's bills, and a cash reserve means they do not have to. The structure is meant to deal with exactly the situation described under sequence of returns risk, where early losses combined with withdrawals do lasting damage.
The names vary. People talk about two buckets, three buckets, or a "cash flow reserve". The details, such as how many years of spending the cash holds and when it gets refilled, differ from one description to the next, and no single version is the bucket strategy.
Where the idea is written down
We read two documents that describe it, and we want to be clear about how much they tell us. A 2011 conference slide deck co-authored by Evensky describes a two-bucket arrangement with a cash flow reserve holding two years of living expenses, topped up when the cash falls to two months of spending or when rebalancing is triggered. Its worked example starts with a $1M portfolio and $50,000 a year of spending, split into $900,000 invested and $100,000 in cash.
A 2013 journal article, also co-authored by Evensky, credits him with introducing a two-bucket distribution strategy in 1997 and says his firm has used a cash reserve since 1985. Evensky's own 1997 text was not located or read, so our descriptions come from the 2011 deck and the 2013 article, not from the original. Both were read on 2026-11-04 through a tool that summarizes pages, and the figures should be confirmed against the documents themselves before anyone relies on them.
A simple test with the calculator's own markets
To see what a reserve does inside this model, we ran a static comparison for this page. It is not a feature of the calculator. The setup is an example: $1,000,000 at age 65, a fixed real withdrawal, 30 years, and the default 1971 to 2025 real-return assumptions. The comparison is made at two spending levels, $40,000 and $50,000 a year, and each is tested with a cash reserve of two years and of three years of spending.
The rules are simple on purpose, which is typical of an example like this. The cash is set aside on day one and earns nothing after inflation. Spending comes from cash first. If the cash runs short, the rest is taken from the invested part, which is a 60/40 mix. After each year's spending, if the invested part had a positive return that year, the cash is topped up from it back to the target. A run fails when the invested part reaches zero. The comparison column is the same $1,000,000 held entirely as a 60/40 mix with no reserve, using the identical random draws, so any gap comes from the structure and not from luck.
| Starting rate | Structure | Money lasted |
|---|---|---|
| 4% | Plain 60/40 mix | 95% |
| 4% | 2-year cash bucket | 95% |
| 4% | 3-year cash bucket | 94% |
| 5% | Plain 60/40 mix | 80% |
| 5% | 2-year cash bucket | 79% |
| 5% | 3-year cash bucket | 75% |
In the example at the $40,000 level, the two-year reserve scored 95%, the three-year reserve scored 94%, and the plain mix scored 95%. At the $50,000 level the two-year reserve scored 79%, the three-year reserve scored 75%, and the plain mix scored 80%. These are all shares of 5,000 simulated paths under the default assumptions.
Look at the first set. A gap of a point is the size of ordinary run-to-run noise: for the default plan, eight different random seeds at this trial count ranged 87% to 89%. The second set shows the three-year reserve behind the plain mix by more than that noise, which is plausible, since three years of cash earning nothing leaves less money working in the markets. A bigger reserve therefore carries a cost in this test that a smaller one does not.
What this number leaves out. It comes from a model with the assumptions shown, in annual steps and after-inflation returns. It does not model taxes, health or long-term care costs, inflation that differs from the model, or how you would act in a bad year. See what a Monte Carlo simulation cannot see.
What the numbers do and do not show
The honest reading is modest. In the model, putting a reserve in front of a 60/40 mix did not lift the success rate, and a large one lowered it. That fits what you would expect if you think about the arithmetic. The reserve does not create return. It changes which dollars get spent first and, in this test, replaces some invested money with money earning nothing after inflation.
A secondary account points the same way. The 2013 article reports, in a reading we have not checked a second time, that a cash reserve improved 30-year plan survival versus no reserve only once transaction costs were included, and that the no-reserve strategy came out about one point ahead when there were no taxes or costs. That reading puts the two figures at 76.9% without a reserve and 76.0% with a one-year reserve, and it adds a 66% figure for a reserve held in a taxable account at a 4% rate. We cite them as a second source of the same flavor, not as settled numbers.
Three things a reserve can do sit outside what this test measures:
- It can change what you see. If a statement shows cash falling slowly while the stock part falls fast, the experience of a bad year is different from watching one balance drop. The model counts the same dollars either way.
- It can change what you do. Whether a person holds steady or sells in a panic is behavior, and a simulation that rebalances by rule cannot capture it.
- It can matter more in a different setup, such as one with flexible spending, where the reserve lets a person skip selling stocks in a bad stretch. This test used a fixed real withdrawal.
None of that makes the strategy right or wrong. It means the success rate is the wrong instrument for judging some of what buckets are meant to do.
A fairer test would need pieces that this page does not have. It would let the cash earn a realistic rate, so the reserve is not penalized for sitting idle. It would model spending that flexes after a bad year, since that is the situation a reserve is meant to ease. It would count taxes and trading costs, which the 2013 article says changed its result. And it would measure more than one number, for example the lowest spending a path ever had to accept, not only whether the money survived. Our Monte Carlo simulation retirement calculator on the home page does none of these, because it models one portfolio with annual steps. We would rather say so than let a tidy table imply more than it can.
There is also a plain point about timing. A reserve only helps in the rough years if it is full when the rough years begin. If a downturn arrives before the reserve has been refilled, or in a long run of years that each follow a loss, the cash runs down and the structure has little left to offer. The test above refills the reserve whenever the invested part has a positive year, which is one rule among many, and a slower refill rule would give different numbers. Our table is therefore best read as one sample of how such a rule can behave, not a ruling on all of them.
How it connects to the other withdrawal ideas
A bucket structure answers the question of where the next payment comes from. It does not answer how much to take. That second question is the territory of the 4% rule and the other approaches compared under withdrawal strategies, including percentage-of-balance and guardrail methods. A reserve can sit underneath any of them.
It also does not change the arithmetic of how long a balance lasts. The page on how long your money will last in retirement shows how strongly the answer depends on the ratio of spending to starting balance, and a bucket arrangement works inside that same ratio.
Readers sometimes ask whether gold could fill one of the compartments. That question is answered with data on gold in a retirement portfolio, which sets out what gold did in dated periods and what a gold slice did to the model's score under two different return assumptions. Readers who want to know how one gold IRA provider describes itself, including who its minimum fits and who it does not, can read the Augusta Precious Metals gold IRA page.
What this can't tell you
This page can't tell you whether a bucket arrangement would suit your life. It uses one balance, two spending levels, one set of historical statistics and a cash reserve with simple rules. It does not include taxes, trading costs, interest on the reserve, spending that flexes with markets, or the way a real person would respond to a bad year. For the wider list of things a simulation misses, see what a Monte Carlo simulation cannot see. To try your own plan, the free Monte Carlo retirement calculator is on the home page, and a second look at the same tool is as easy as running it again with different inputs.
Frequently asked questions
Is a bucket strategy the same as a withdrawal rate?
No. A bucket arrangement decides where each year's payment comes from, while a withdrawal rate decides how large the payment is. The two can be combined, which is why this page tests a reserve under two different spending levels and keeps them separate.
Did the cash reserve raise the success rate in your test?
Not in any meaningful way. At the lower spending level the results matched within normal run-to-run noise, and at the higher level the three-year reserve scored below the plain mix. This is a simplified static test with cash earning nothing after inflation.
Does the calculator have a bucket setting?
No. The comparison here was run separately, using the same random draws as the calculator's engine so the two sides saw identical markets, but the calculator itself models a single portfolio with the stock, bond and gold split you choose.
Where did the strategy come from?
The descriptions we read credit Evensky with a two-bucket approach introduced in 1997, according to a 2013 article he co-authored. We could not locate his original 1997 text, so that attribution rests on the later article.