Skills on AI

Basic Budget

Download raw SKILL.md

Use when someone has never kept a budget, has abandoned complicated ones, or wants a first budget built in one sitting with a few broad buckets. This is the starter version of [[personal-budget]], the fuller zero-based household plan, so graduate to that once this holds. Related to [[automated-savings]] (moving the savings bucket on payday), [[money-map]] (which accounts exist, not how much goes where), and [[bill-autopay]] (paying the fixed bucket without effort).

A basic budget is the smallest plan that still works: one income figure, three to five broad buckets, and one monthly check. It is the starter version of Personal Budget. That skill assigns every unit of income a job across many categories; this one accepts rougher numbers in return for being finished in a single sitting and survivable for months. The aim is a plan the user actually follows, not an exact one.

Input required

  • Country and currency, so terms such as "take-home pay" fit.
  • Monthly take-home income after tax and deductions, using the lowest typical month if income varies.
  • Fixed costs: housing, utilities, insurance, loan minimums, phone, transport passes.
  • Rough spending for food and everything else, ideally read from one or two recent bank or card statements.
  • One goal to fund (emergency cushion, a debt, a purchase).

If details are missing, state assumptions or ask the questions below once, then proceed.

Questions to ask first

Ask in one batch of at most five questions, skipping any already answered:

  1. What do you take home in a typical month, and in a low month?
  2. What are your fixed bills and loan minimums each month?
  3. Roughly what do you spend on food and everything else? Can you open a recent statement to check?
  4. What is the one thing you most want the budget to do?
  5. How long can you give this today? About an hour is enough.

Method

  1. Write the income line. Use take-home pay. For uneven income, use the low month and treat anything above it as a bonus to assign later.
  2. Create four buckets. Fixed (must-pay bills), Flexible (food, transport, fun, everything else), Savings and debt (the goal), and Buffer (a small unassigned amount for surprises). Add a fifth, Yearly (insurance, registration, gifts), only if annual costs have hurt before.
  3. Fill Fixed first from statements, not memory.
  4. Set Savings and debt next, before Flexible. Pick a modest amount that survives a bad month. The default to propose is a round number the user can keep for six months; raising it later is easy, while breaking a too-high plan costs trust.
  5. Give Flexible what is left, then compare it with the last month's actual spending. If the gap is large, adjust the plan or the goal now, not in week three.
  6. Make the check small. One fixed day a month, ten minutes: total what went out of each bucket, note one change, done. No per-purchase tracking is required.
  7. Name the upgrade trigger. When the basic budget has held for about three months, or irregular costs keep breaking it, move to Personal Budget.

Output format

  • Assumptions stated in one or two lines.
  • The budget table: bucket, monthly amount, and what it covers.
  • The check routine: day, length, and the two numbers to look at.
  • One rule for overspending, for example "Flexible runs out, so fun stops until the first of the month."
  • Next step toward Personal Budget and when to take it.

| Bucket | Covers | Monthly amount | |---|---|---| | Fixed | Rent, utilities, insurance, minimums | from statements | | Savings and debt | The one goal | chosen amount | | Flexible | Food, transport, fun | the remainder | | Buffer | Surprises | small, deliberate |

Ground rules

  • Never ask the user to paste account numbers, card numbers, passwords, or government ID numbers. Amounts and categories are enough.
  • Do not give tax, investment, or debt-advice specifics; point to a qualified local source for those.
  • Keep the buckets few. Resist adding categories to be thorough.
  • Use the user's real figures, not typical ones, and mark guesses.

Self-check before answering

  • Does the plan fit in four or five buckets and one page?
  • Did Savings and debt get funded before Flexible?
  • Is the income figure a realistic low month, not a hoped-for one?
  • Can the user complete the monthly check in ten minutes?
  • Is the path to Personal Budget stated?

Common pitfalls

  • Counting gross pay and finding the money missing.
  • Budgeting from memory and underestimating Flexible spending.
  • Savings as leftovers, which usually means zero.
  • No buffer, so the first surprise ends the plan.
  • Over-tracking: logging every coffee, then quitting in a month.
  • Treating one bad month as failure rather than adjusting a bucket.

Example prompt

I have never kept a budget and I always give up. Build me the simplest version that works, from my take-home pay and last month's statement, with a ten-minute monthly check.

Learn more

View basic-budget/SKILL.md on GitHub