Guide · irregular income: How to Budget on an Irregular Income

Why ordinary budgets break on uneven income

Almost every budget template starts with one line: your monthly income. On a salary that line is a fact. If you freelance, sell, drive, tutor, work on commission or live on tips, it’s a guess, and everything below it inherits the guess.

The usual fix is to use your average. It’s the wrong one. An average is a month you have about half the time, so a budget built on it comes up short in every month below average — and those are exactly the months you needed it to work.

Step 1: Find your baseline

Write down what actually landed in each of the last twelve months (six if that’s all you have). Here is one freelancer’s year, in euros:

The average is €3,000. The lowest month is €1,900, and the three lowest average out at €2,067. That last figure is the baseline: a number most months beat, and one even a bad month comes close to. If your income is very uneven, or you’re just starting out, use the single lowest month instead.

Step 2: Cover the fixed costs from the baseline

List what you pay whatever happens: rent, utilities, phone, insurance, debt repayments, subscriptions you’re keeping. Say they come to €1,500. That leaves €567 of the baseline for everything that changes — food, transport, going out — and that is your monthly spending limit.

If the fixed costs alone come close to the baseline, that’s the most useful thing the exercise can tell you, and it’s better to learn it now than in a €1,900 month.

Step 3: Build a buffer that pays you a wage

Open a separate account — a savings account works — and treat it as your employer. Every payment from a client goes in; once a month, the buffer pays your everyday account the baseline, €2,067. From the spending side, every month now looks the same.

Aim for one month of essential spending in the buffer to start, then two to three months. The bigger your swings, the bigger it needs to be: in the year above, the gap between the best and worst months is €2,300.

Step 4: Give surplus months a job

A month that beats the baseline is not a raise. Decide in advance where the surplus goes, in order, so the decision isn’t made in a good mood:

1. Top up the buffer until it holds the months you’re aiming for.
2. Set aside tax, if you’re self-employed and it isn’t deducted for you. The rate depends on where you live; check your local rules.
3. Pay down debt, or move it to savings.
4. Only then, spend some of it.

Step 5: Track income as carefully as spending

Most money apps are expense trackers with an income column. On an irregular income, the income side needs its own target and its own history: how close each month came, and whether the gap is growing.

In Wealtie, that’s the income goal: a target to reach, kept separate from the spending limit, with a streak for every month you reach it. Set it to your baseline. On Pro, the Analytics income tab scores how steady your income is out of 100 and projects next month from the income you’ve set to repeat. The budget gets its own warning in the middle of the month if your spending pace will take you over — see budgets and income goals.

The method on one line

Budget from the low end, pay yourself a wage from a buffer, and decide what surplus is for before it lands.