Nothing about a good year announces danger. The harvest sells at twice last season's price. The shop has its best quarter since it opened. The contract lands, the remittances from the family abroad...
Nothing about a good year announces danger. The harvest sells at twice last season's price. The shop has its best quarter since it opened. The contract lands, the remittances from the family abroad surge, the side business finally pays. And the household does what households do: it rises to meet the money. A better school. A bigger order of stock. A commitment to build. Within months the good year is not a windfall anymore; it is the new baseline, and every plan the family makes now quietly assumes the best year will repeat.
That is how windfalls disappear. Not in one foolish purchase, but in a hundred reasonable upgrades that convert temporary money into permanent obligations. And the reason it happens is simple: nothing was decided about the good year before it arrived.
Gregory Curtis, who founded the wealth advisory firm Greycourt & Co. after decades of managing money for wealthy American families, wrote a whole book about what separates families whose wealth survives from families whose wealth evaporates. The Stewardship of Wealth (2012) was written for people with portfolios, private banks, and advisors, and much of its machinery is American and dated, which we will flag as we go. But the discipline at its center is one sentence long, it applies to a harvest as well as a hedge fund, and it runs against every instinct a family has in a good season: "Taking money off the table during strong markets is the way wealth is preserved."
Read the full passage, because Curtis is talking to people at the exact moment they least want to hear it. When markets are booming, he says, we are sorely tempted to let our winnings ride, and some of that is fine. "But there are limits. We originally set those limits (I hope) in calm moments, before we were faced with temptation. Then, no matter how strong the markets appear to be, and no matter how certain we are that they will continue to rise, once our maximum exposure has been reached we must, must rebalance."
Two things in that passage do all the work. The limits are set in calm moments, before temptation. And when the limit is reached, the response is not judgment, or debate, or a family meeting about whether this boom is different. It is automatic. That is the entire technology: decide while calm, obey while excited.
Curtis makes the case for smoothness with a parable he admits is engineered, about twins named Dick and Jane. An eccentric uncle leaves each of them one million dollars in trust, with a wager attached: after ten years, whichever twin's account holds more money gets full control of both inheritances. Dick puts everything in a simple, low-cost index fund, mostly stocks, and plays golf. Jane hires an advisor who builds a duller, broader portfolio anchored by bonds, spread across eight kinds of assets, and rebalanced back to plan whenever it drifts.
Ten years later the trust officer reveals the twist: both portfolios earned exactly the same return, nine percent per year, net of fees. A dead heat, Jane says. Then the balances are read out. Dick has $1,936,412. Jane has $2,387,938. Same average return, and Jane is ahead by $451,526, purely because her portfolio swung less violently on the way. The trust officer's summary is the lesson: "the higher the volatility, the lower the final dollars."
The arithmetic behind this is called variance drain, and it is not intuitive, so hold it with a plain example. Lose fifty percent one year and gain fifty percent the next, and your average return is zero, but your money is down twenty-five percent, because the gain was earned on the shrunken amount. Swings themselves cost money, even when the averages look identical. A steadier path compounds into more wealth than a flashier path with the same average, every time.
An honesty note before you carry those numbers anywhere: they are built on United States stock market assumptions from before 2012, and they are illustrations, not forecasts. No family should expect nine percent from anything, and this journal is not telling you where to invest. What travels is the structure: smoother beats showier at the same average, which means the boring decision that reduces your family's swings, the reserve fund, the refusal to bet the whole harvest, the diversified plot, is not timidity. It is mathematically a wealth-building move, even when it looks like leaving money on the table.
The book's second parable, which Curtis adapts from the investor John Bogle, is about how fast a fortune shrinks when its owner projects a straight line. Edith, twenty-five years old, inherits $10 million from her grandmother. She notes that stocks have historically returned 11.3 percent a year, taps her calculator, and concludes that in fifty years she will leave her own grandchildren $2.8 billion.
Then Curtis walks through what Edith forgot, subtracting as he goes. She forgot variance drain: returns arrive in swings, not straight lines, and the swings alone cut her realistic outcome by almost half. She forgot inflation, which turns headline returns into much smaller real ones. She forgot costs: fees, commissions, the friction of investing itself. She forgot taxes. And she forgot that she has to live, spending a modest four percent of the money each year. By the time the five deductions are stacked, the $2.8 billion has collapsed to roughly $3 million, which Curtis lands with a number designed to be remembered: "roughly 1/10 of 1 percent of what she hoped to get."
Again, be careful with the specifics. The 11.3 percent, the inflation rate, the tax drag are all American historical figures from Bogle's era, useless as predictions anywhere, including America. But the shape of Edith's mistake is universal, and it is the same mistake the family makes in the good year. The founder who has one great season and mentally multiplies it by the next twenty years is doing Edith's math. So is the family that receives a land payout and starts a building whose completion assumes the payout will somehow recur. A windfall is not a rate. It is a lump, and lumps face headwinds: the celebration spending, the relatives' claims, the price increases that follow visible money, the lean season already forming on the other side of the good one. The steward's question in a good year is never "what does this become if it continues?" It is "what must this cover if it stops?"
Curtis's families implement the discipline through rebalancing bands: the portfolio is allowed to drift between a floor and a ceiling, and crossing either line forces action, no discussion entered into. His behavioral rule is blunt: "buy the right risk and keep it." If your plan says sixty-five percent in stocks, he asks, what in the world are you doing letting a boom carry you to eighty percent? The boom did not change your family. It changed your exposure, silently, and rebalancing is simply the act of taking back the decision.
The book stops at portfolios. We go one step further, because a household's income has booms and crashes too, and almost no family sets bands around them.
Here is the household translation, and it fits on one page of a family's records. While the year is ordinary and heads are cool, the family writes down three numbers. First, a baseline: what normal monthly spending is, the figure that covers the real life of the household without the good year's help. Second, a ceiling: how far spending may rise in a good season, expressed as a limit, perhaps ten or twenty percent above baseline, never as a mood. Third, a windfall rule: a fixed split, decided in advance, for any money that arrives above the ceiling. A family might choose forty percent to the reserve, thirty percent to one named investment, twenty percent to generosity and family obligations, ten percent to celebration, and the percentages matter far less than their existence. When the good year comes, and it will, the family does not decide what to do with the surplus. It already decided. The surplus hits the ceiling and the overflow is taken off the table, into the reserve and the named investment, exactly the way Curtis's families are forced to sell into a boom.
Notice what the split does for the founder personality in particular. It does not forbid celebration; it budgets it, which is the only version of restraint that survives contact with an actual good year. It does not treat obligations to the wider family as leakage; it names them and caps them, which protects both the money and the relationships. And it converts the moment of maximum temptation into a moment of zero decisions.
For those raising teenagers, this rule is also the single most teachable piece of money discipline in this book, precisely because a windfall is visible to the whole house. When the good harvest arrives and the family is seen moving a fixed share straight into the reserve before anything is enjoyed, a fifteen-year-old learns something no lecture delivers: in this family, a good year is not permission, it is ammunition. Let them watch the split happen. Better, let them know the percentages and hold the family to them, because a teenager enforcing the family's own written rule is a steward in training.
The discipline has a mirror image, and Curtis is just as firm about it. In a downturn, the temptation reverses: abandon the plan, sell everything, go to cash, stop contributing, wait until things feel safe. Of families who give in, he writes, all this will do "is put us on the sidelines when the recovery occurs." They absorb the loss and then miss the repair, which is how a temporary crash becomes a permanent one.
The household version is precise. The family that responds to a bad season by abandoning its structure, emptying the reserve for consumables first, pulling children from the better school in a panic rather than by plan, selling the productive asset at the bottom because it is the easiest thing to sell, has done Curtis's sideline move. The bands protect against this too, because the same calm-day document that capped the good year also says, in writing, what gets cut first, what gets cut last, and what does not get touched at all in a bad one. Deciding the order of sacrifice before the crisis is the difference between a family that shrinks in a controlled way and a family that amputates at random. If it is important, decide it while you are calm; the bad day will not improve your judgment.
This is work your Budget Planner in LegacyPot is built to hold. Set the baseline, the ceiling, and the windfall split as standing figures in the plan, so that when the good month arrives the overflow already has an address, and review the numbers once a year at a family sitting rather than in the heat of either kind of season.
This month, while nothing dramatic is happening, hold the calm-moment meeting Curtis prescribes, even if it is just two people at a kitchen table. Write down the three numbers: your baseline, your ceiling, and your windfall split, with real percentages next to real destinations. Then write the mirror page for a bad season: the order in which spending gets cut, and the short list of things, the reserve's core, the school fees, the productive asset, that do not get touched without a family decision. Put both pages where the family plans its money.
Then wait. The test will come, and it will come disguised as good news. The harvest will surprise you, the quarter will break records, the money will arrive warm, and everything in you will say this time is the new normal. That is the moment this page was written for. You will not need wisdom in that moment, because you already used it, back when you were calm. You will only need to obey your own instruction, move the overflow off the table, and let the good year do the one thing good years are actually for: making the family harder to ruin.
Curtis watched families with hundred-million-dollar portfolios fail at exactly this, not for lack of intelligence but for lack of a rule that outranked their excitement. The rule costs one evening. Most families, at every level of wealth, never write it. Yours can write it this week.