Putting Windfalls to Work

A tax refund, a year-end bonus, an inheritance, the proceeds of a home sale: a windfall can move a goal forward by years in a single afternoon. It can also vanish in a few weeks with nothing to show for it, not through one big mistake but through a string of small, reasonable-sounding ones. This chapter explains why unexpected money is so easy to lose, how to decide what to do with it before it arrives, where each part should go, and what is different about each kind of windfall.

Why windfalls slip away

Economists call the root of the problem mental accounting, a term Richard Thaler developed: people treat money differently depending on where it came from, even though a dollar is a dollar. Money that feels "extra" escapes the rules applied to a paycheck. Four patterns follow.

• Found money. A refund or bonus feels like a gift, so it is spent like one.
• The permanent upgrade. A one-time sum funds a bigger car payment or a pricier lease, which then outlasts the windfall by years.
• Paralysis. Unsure of the perfect use, the money sits in checking, where it slowly leaks into everyday spending.
• Other people. Once friends or relatives know, requests and expectations follow.

The common fix is to make the decision before the money arrives, while it is still hypothetical and emotion is low, then carry out the plan quickly when it lands.

Decide the split in advance

A written split turns a windfall into a set of transfers instead of a set of temptations. One balanced example:

• Half to foundation goals: high-interest debt, the emergency fund, and any employer match you are missing.
• About a third to long-term goals: retirement accounts, the down payment, education.
• A tenth to enjoy, with no justification needed. A plan that allows nothing for fun is the plan most likely to be abandoned.
• A tenth to give, if giving matters to you.

The exact shares should follow your situation. Someone with credit card debt and no emergency fund might send nearly all of a windfall to the foundation; someone with both in good shape might put most of it toward long-term goals. What matters is that the shares are written down before the money shows up.

Where the foundation share goes first

Within the foundation share, a common order is:

1. High-interest debt. Paying off a credit card is a guaranteed, tax-free return equal to its rate.
2. The emergency fund gap. If you have less than a few months of essential spending in cash, fill that gap next.
3. A missing match. If cash flow has kept you below the full employer match, raise your contribution and let the windfall cover the gap in take-home pay.
4. Moderate-rate debt, such as car or private student loans, where paying early is a closer call. The pay off debt or invest calculator compares the options.
5. Tax-advantaged room. Accounts with yearly limits, such as an IRA or HSA, lose any room not used by the deadline.

The first step is usually the most valuable. Consider a card balance of $5,000 at 22.0%, paid down at $150 a month:

Left on that schedule it takes 52 months and costs $2,798 in interest. A windfall that clears it avoids all of that interest and frees the monthly payment for other goals.

On the long-term side, even a modest sum makes a visible difference when it has time. Here is a $3,000 Roth IRA contribution, within the yearly limit, left alone for 20 years:

At an assumed 7.0% a year it grows to about $11,609, and qualified withdrawals in retirement are tax-free.

Each kind of windfall has its own rules

Tax refunds. The most predictable windfall, so the easiest to plan. A large refund means too much was withheld during the year; adjusting your Form W-4 puts that money in each paycheck instead, where it can go into automatic saving. A refund that arrives before the tax filing deadline can still fund an IRA contribution for the year just ended.

Bonuses. Employers often withhold federal income tax on bonuses at a flat 22%, which may be more or less than you finally owe, and state tax, Social Security and Medicare come out too. Plan around the amount that will actually land. Some employers let you direct part of a bonus into your 401(k). The bonus tax calculator estimates the take-home amount.

Inheritances. Grief and large financial decisions do not mix. Park the money in an insured high-yield account and give yourself several months before committing it. Inherited retirement accounts have their own rules: most beneficiaries who are not a spouse must empty an inherited IRA within ten years, and the timing of withdrawals affects the tax. For a large or complex estate, an hour with a fee-only planner or a tax professional is often worth it.

Home sale proceeds. If the money is going into the next home, set that part aside first. Gain on selling your main home is excluded from income up to $250,000 for a single filer or $500,000 for a married couple filing jointly, generally if you owned and lived in it for at least two of the five years before the sale. Any surplus can move several goals at once.

Raises. Not a lump sum, but treated the same way: decide in advance how much of each raise goes to savings, as chapter 5 describes.

The 48-hour plan

Speed protects a windfall. Once it arrives:

1. First hours: confirm the real amount. Check what actually landed after tax, and work out each share in dollars.
2. Same day: fund the foundation. Pay the debt, top up the emergency fund, and make the account transfers.
3. Within a day: move the long-term share to retirement, down payment or education accounts.
4. Within two days: enjoy and give. Spend the fun share without guilt and make the gifts you planned.

For a very large windfall such as a big inheritance, flip the timing: move it to safety within 48 hours, then take weeks or months to decide the long-term plan. Waiting with the money parked in an insured account costs little; deciding in a rush can cost a great deal. And for large sums, consider keeping the amount private.