The first number is the one that ruins people
A $40,000 bonus does not put $40,000 in your life. Payroll withheld a flat 22% because that is what the rules tell it to do for supplemental wages — not because 22% is your rate. If your salary already has you in the 24% or 32% bracket, the rest of that bill is sitting quietly in your checking account looking exactly like spendable money until April, when it stops looking like that. Sell some crypto or a chunk of vested stock and it is worse: nobody withheld anything at all, and depending on the size, an estimated payment may be due months before the return.
This is why the tool asks where the money came from before it asks anything else. Inherited cash is not income and owes nothing. An inherited IRA is ordinary income and owes plenty. A home sale is taxed on the gain after a large exclusion, not on the check. Same amount of money, completely different first move.
Order beats optimization
Almost every question that starts "should I invest this or..." has an answer that does not depend on predicting anything. An employer match you are not capturing is an instant 50% or 100% return. A 24% credit card is a guaranteed 24% return, tax-free, with no volatility. A cash cushion is what stops the next surprise from turning back into a 24% credit card. All three of those beat an uncertain 7% before you have to have a single opinion about the market.
The interesting part is what happens when the money runs out partway down the list. The tool keeps going anyway and tells you what stayed unfunded — because "this windfall closes your emergency fund and half the card, and here is what's left" is a far more useful sentence than a pie chart of an ideal you cannot afford yet.
The move this page can't do for you
A windfall cannot be deposited into a 401(k). Contributions to one only ever come out of a paycheck, which is why no bucket above sends money there. But there is a back door, and it is the best use of a windfall that almost nobody makes: raise your payroll contribution — to the full match, or to the annual limit if you can — and live on the windfall while your take-home shrinks. The lump sum never enters the account, yet it is what makes the contribution affordable. If your employer matches and you are not capturing all of it, that is the highest guaranteed return available to you, ahead of every other line on this page. The Employer Match Paycheck Planner works out what you'd need to contribute, including the trap where contributing too fast shuts the match off early.
The 5% that protects the other 95%
The fun bucket is not a rounding error, and it is not a moral failing. Windfalls that get allocated with perfect discipline and zero enjoyment have a way of leaking out sideways over the following six months. Naming a deliberate number, spending it on something you actually wanted, and then treating the rest as untouchable is the version that survives contact with being a person.
When you have the invested slice, take it to the Compound Growth Planner to watch it work, or the Debt Payoff Planner if the balances above are the part that keeps you up at night. If the employer match line was the one you could not answer, the Employer Match Paycheck Planner is the tool that answers it.