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Zero-based budgeting works the same whether your income is steady or not, but the mindset shifts. You budget the dollars sitting in your accounts today, not a paycheck you hope is coming. Budget Bandit never asks you to forecast income — you only ever assign money you already have.

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The core idea

When income arrives, it lands in Ready to Assign. You give those dollars jobs. When nothing arrives, Ready to Assign sits where it is and you spend down what your categories already hold. There is no “expected income” line to get wrong — what you can spend is the number in the category, full stop.

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A practical method

1

Build a one-month buffer first

The goal is to be spending last month’s income, not this month’s. Until you get there, assign each deposit to this month’s most urgent needs as it lands: rent, food, utilities, minimum debt payments.
2

Prioritize your categories

Order your categories so the essentials sit at the top. On a thin month you fund from the top down and stop when the money runs out. On a strong month you keep going into the lower-priority categories.
3

Assign every deposit when it arrives

Each time money comes in, open the Budget page and assign the new Ready to Assign balance. Fund the top priorities to their targets first.
4

Use targets to see what each category needs

Give recurring bills a target so you always know the gap between what is funded and what is due. A good month lets you fund ahead.

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Tools that help with variable income

  • Auto-assign, Fund My Goals. When a deposit lands, run Auto-assign with the “Fund My Goals” strategy. It fills your targets earliest due dates first, so the most urgent bills get the new money before the rest.
  • Based on Spending. For categories with no fixed target, the “Based on Spending” strategy sets them to your three-month average — a realistic number for variable costs.
  • Move money freely. A lean month will leave a category short. Cover it by moving money from a category that came in under.

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Fund a buffer category

Many people on irregular income keep a dedicated category — call it Income Buffer or Next Month — and over-fund it in strong months. When a weak month comes, they move money out of the buffer into the categories that fell short. This smooths the swings without forecasting anything.
The day you are fully funding next month from money you already earned, irregular income stops feeling irregular. The budget no longer cares when the next deposit lands.

Auto-assign

Fund your priorities each time income arrives.

Set a target

Tell each category what it needs.

Assign and move money

Cover a lean month by moving money.

Rolling money forward

How leftover money carries into next month.