Money, Explained From the Inside

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Irregular income smoother

If your income arrives in lumps, spending what arrives makes good months feel rich and bad months feel like emergencies. Pay yourself a steady amount instead and let a buffer absorb the swings.

1 · The idea

Buffer as a shock absorber

Every month, add what you earned and take out your steady salary. The buffer rises in good months and falls in lean ones. The largest steady salary that never takes the buffer below zero is the lowest running average of your income, including the starting buffer.

The formula

Buffer(month) = buffer(month − 1) + income − steady salary

income
what actually arrives each month
steady salary
what you pay yourself every month
buffer
accessible cash that absorbs the difference

2 · A worked example

A year of lumpy income averaging $2,958 a month. Paying yourself $2,500 steadily from a $3,000 buffer: the buffer never drops below $1,700 and ends at $8,500. Spending what arrives, 5 months would have fallen below $2,500 of essentials.

3 · Now use your own numbers

Change anything. The result updates instantly.

Income that arrives
Lowest the buffer reaches
$1,700Never below zero
Largest steady salary that works
$3,100Given your starting buffer
Average monthly income
$2,958
Months below essentials if you spent what arrived
5
Buffer needed to start at zero
$1,300Deepest dip at this salary
03k5k8k10k024681012
Month on the horizontal axis.
  • Buffer balance
  • Income that arrived

What this means

The line is the point: income swings wildly, the buffer swings less, and your spending stays steady. If the buffer dips below zero, either lower the salary or hold a larger buffer before starting.

Raising the salary above the sustainable level means borrowing from the future, which is how irregular earners drift into debt.

Illustrative, not personal advice. Inspired by Chapter 7 · Resilience of Money, Explained From the Inside. Your figures stay in this browser. Real products add terms, taxes and conditions that this simple model leaves out.

4 · Take care

What this tool can’t see

  • Set aside tax from each payment before it enters the buffer, if your income is not taxed at source.
  • Twelve months is a sample: lean spells can be longer. Test your worst year.
  • A buffer is only useful if it is separate from everyday spending money.

5 · Go further

Where this fits

See it in a life:

SofiaBuffers and irregular income

Private to this device. Nothing is sent anywhere.

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