Before you pay, a need is something you must buy to keep daily life running — food, rent, transport to work, medicine — while a want adds comfort or enjoyment but can be delayed without anything essential breaking. The fastest test is one question: "If I skip this for the rest of the month, does my health, work, housing or a promised payment suffer?" — if yes it is a need, if no it is a want. This matters most to people new to budgeting (a budget is a written plan of money coming in and money going out) and to anyone whose income is tight or irregular, because it decides which spending gets funded first.

Two quick tests before you pay

The skip test. Ask what breaks this month if you do not buy it. If something essential breaks, it is a need; if nothing breaks, it is a want.

The wait test. For anything that lands in the "want" column, wait one or two days before paying. If the urge fades, it was impulse rather than a planned choice. Waiting also gives you time to compare prices between vendors.

A worked example (all figures illustrative)

An illustrative figure is a round, made-up number used for teaching; this article uses no product data, so no figure here is any real product's terms.

Assumptions. Amy's monthly take-home income (pay after deductions) is HK$20,000. Her needs: rent HK$8,000; transport to work HK$800; groceries HK$2,500; medicine HK$300; phone plan HK$150 — total HK$11,750. She also pays one annual insurance bill of HK$2,400, so she counts it as HK$200 a month, once — never as HK$2,400 plus HK$200 again. Needs total: HK$11,950. Earlier this month she already spent or set aside HK$7,050 on wants and savings, leaving HK$1,000 for the rest of the month.

Her list tonight: umbrella HK$60 (the old one broke); concert ticket HK$880; headphones HK$1,200; a promised birthday gift HK$300.

Step 1 — skip test. Umbrella: she walks 15 minutes to the ferry, and skipping it affects getting to work, so it is a need. Gift: already promised, and she treats promised payments as needs. Concert and headphones: nothing essential breaks, so they are wants.

Step 2 — fund needs first. HK$60 + HK$300 = HK$360. Remaining: HK$1,000 − HK$360 = HK$640.

Step 3 — wait test. After two days she still wants the concert; the headphones no longer matter, so they were impulse.

Step 4 — fit the budget. The concert at HK$880 exceeds the HK$640 left, so she defers it to a future month's plan instead of cutting needs; the headphones come off the list.

Result: buy the umbrella and the gift, drop the headphones, defer the concert. Every number above is illustrative.

Common mistakes and the better reading

  • "It is useful, so I need it." Many wants are useful. Better reading: the test is what breaks if you skip it this month, not whether the item has any use.
  • "Copying a fixed spending ratio seen online." There is no universal ratio that fits everyone. Better reading: build your own split from your actual rent, income and obligations.
  • "Counting an annual bill twice — once in full and again as a monthly reserve." Better reading: divide it by twelve, set it aside once a month, and do not list it again as a separate expense.
  • "Wants are forbidden." Better reading: wants belong in a healthy budget; the point is to fund needs first and then choose wants on purpose.

Checklist: what to do next

  • Write the item and its price before paying.
  • Run the skip test: what breaks this month if you skip it?
  • For wants, wait one or two days and compare at least two vendors.
  • Check the price fits this month's remaining budget; if not, remove or defer lower-priority items.
  • Re-check your lists whenever circumstances change — a new job, rent or family duty can move items between the two columns.

Sources

As of 2026-10-08, this guide draws on two IFEC Money Essentials materials, both retrieved on 2026-10-08: "Make a shopping list with your child" (its logic of listing, prioritising, removing and waiting is adapted here from a parents' resource to adult use) and "Getting started with a financial plan" (budgeting tracks money in and out and should be reviewed when circumstances change). This article is AI-generated and AI-checked. It is general education, not investment or lending advice. If a purchase involves a financial product, you can compare options on Jolvex's comparison pages.