The Dangerous Year Isn't the One You Think

There's a version of this story that gets told a lot, and it goes: someone sells their company, gets liquid, and now the job is to invest it well. Find the right adviser, pick the right allocation, don't get too conservative, don't get too greedy. Get the money working. That story isn't wrong, exactly. It's just not the one that actually plays out for most people in the first year.

The version that actually plays out

The more common version looks like this. Somewhere around week six, a friend of a friend introduces a "great opportunity" and it feels rude, or slow, or oddly ungrateful, not to look serious about it. Somewhere around month three, a property gets bought in a country visited twice, because it felt like the right moment to finally do the thing. Somewhere in there, a sibling or a parent gets a large, informal loan that everyone privately understands isn't really a loan. And somewhere in the first year, someone spends four months in a country without quite meaning to, and finds out afterward that four months was the number that mattered: the number a tax authority uses to decide where you live, whether you meant to or not.

None of these are investment mistakes. Nobody lost money in a bad fund. They're something else: decisions that were fine to make eventually, made too early, too fast, and (this is the part that actually hurts) too permanently.

The real risk: irreversibility, not bad investing

That's the reframe worth holding onto, because it's the single most useful thing to say to someone in the first months after a windfall: the risk in year one isn't that you'll invest badly. It's that you'll decide something irreversible while you're not yet in a state to be deciding anything irreversible.

Why careful people aren't spared

It's worth being honest about why that happens, because it isn't a character flaw and it doesn't spare careful people. A sudden, large change in your financial life is genuinely disorienting, in ways that are well documented and unrelated to how smart or diligent you are. Your sense of who you are gets unsettled: a role, a team, a structure to your week, all can vanish in the same week the money arrives. The tempo of your life changes overnight, from a deal process that ran at full sprint to suddenly nothing scheduled at all. And everyone around you (family, old colleagues, people you haven't heard from in a decade) starts relating to you slightly differently, usually wanting something, even if they'd never say so.

Put those three things together and you get a person whose judgement is temporarily, predictably compromised, at exactly the moment they're facing the biggest decisions of their life. (There's a fuller version of why a business exit is more destabilising than the usual "lottery winner" comparison suggests in Sudden Wealth Syndrome After a Business Exit.)

The rule that handles it

Here's the useful part, though: once you see the actual risk clearly, the response is almost embarrassingly simple. It's not a complicated plan. It's a rule.

The twelve-month rule: avoid large, irreversible decisions for roughly the first year. Keep the proceeds somewhere simple and low-risk while you do.

To be clear about what that isn't. It isn't "do nothing." Securing the money, sorting out your tax position on the sale itself, getting basic insurance in place, handling anything with an actual deadline: none of that waits. The rule isn't guarding against housekeeping. It's guarding against the other category: the relocation, the loan, the new venture, the four months in the wrong country. The decisions that are hard or impossible to undo, made before you've had a real year to think.

Most of the best moves available to you right now are things you deliberately don't do yet. That's a strange thing to hear when you've just done the hardest, most decisive thing of your professional life. It's also the thing that would have saved the most stress if someone had said it plainly on day one.

There's a sequence to the year that follows: what actually needs handling now, what waits, and in what order. A companion piece walks through it: The Sequence: What to Handle After a Windfall, and in What Order.

Frequently asked questions

What is the biggest financial risk in the first year after a windfall?

Rarely a bad investment. Far more often it's an irreversible decision made too early and too fast (a rushed relocation, a large informal loan, a property bought after two visits, a residency triggered by accident), made before the disorientation of a sudden, large change has lifted and judgement has fully returned.

What is the 12-month rule?

A simple guideline that people who work with the newly wealthy tend to converge on: avoid large, irreversible decisions for roughly the first year, and keep the proceeds somewhere simple and low-risk while you do. It isn't "do nothing": housekeeping and anything with a real deadline still happens. It guards specifically against the one-way doors.

Does the 12-month rule mean I should do nothing for a year?

No. Securing the money, sorting the tax position on the sale itself, arranging basic insurance, and handling anything time-sensitive all still happen. The rule guards a different category: relocations, large gifts or loans, funding a new venture, restructuring your whole financial life, decisions that are hard or impossible to undo.