Money decision lab

An unexpected amount arrives

An amount equal to about a month’s income arrives unexpectedly — a bonus, a gift, a refund. Nothing about your regular budget depended on it.

Free — no account needed to read

An amount equal to about a month’s income arrives unexpectedly — a bonus, a gift, a refund. Nothing about your regular budget depended on it. What would you do with it, and why?

What matters here

• Emergency needs
• Existing debt
• Upcoming expenses
• Time horizon
• Risk
• Opportunity cost
• Personal priorities

Ways people reason about it

None of these is marked correct.

Build the buffer first

Money you did not plan on is the easiest money to save, because no part of your life depends on it yet. Putting it into an emergency fund turns the next surprise into an inconvenience rather than a crisis.

Fits when: You have little or no emergency savings.

Clear expensive debt

Paying off a debt with a high interest rate is a return you can count on: every unit repaid stops costing interest immediately.

Fits when: You carry card or short-term debt with a high rate.

Fund something already coming

A known cost — a repair, a fee, a trip home — will need money anyway. Covering it now avoids borrowing later.

Fits when: A large predictable expense is due soon.

Spend part of it on purpose

Setting aside a portion for something you value can make the rest easier to protect, and it treats the windfall as part of a life, not just a spreadsheet.

Fits when: Your buffer and debts are already in a steady place.

What would change the answer

• Whether you have an emergency fund.
• The interest rate on any debt you hold.
• Whether a big cost is due in the next few months.
• Whether the money is truly one-off.