When your income swings month to month, a budget built on your average runs short every time a month comes in below it. Pull a year of deposits, find your worst month, and build a fixed budget that fits inside it, so good months refill your reserve and bad months stop landing on a credit card.
Say your deposits over the past year ran anywhere from $3,000 to $9,000 a month, and you spend like a $6,000 earner every month. The average month never shows up. A $3,000 month leaves you $3,000 short, and the gap lands on a credit card before the next good month arrives.
A bad month is what breaks a budget, so the bad month should set it. Count deposits, the money that actually arrived rather than what you invoiced, and take the lowest of the last 12 months. That’s your floor. Here, it’s $3,000.
Build a fixed budget that fits inside the floor and covers housing, food, insurance, minimum debt payments, and taxes. On self-employment income, the tax line is a fixed share of every payment, moved into a separate tax account the day it lands. That account is where your quarterly payments come from. Big months carry bigger tax bills, so the share comes off the top of every payment, good month or bad.
Whatever is left above the floor after that tax share follows a fixed order. First, refill a cash reserve until it holds three months of your floor budget, since that’s what carries you when a month comes in under the floor or a client pays late. Then the rest goes to savings and discretionary spending, the part of the budget that’s allowed to rise and fall.
Set up that way, a $3,000 month runs on the same budget as a $9,000 one, with nothing going on a card.
If essentials and taxes don’t fit inside your floor, close that gap first. Otherwise, set the budget to the floor this month and let the next good month start the reserve.
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