Fixed expense

The word fixed describes the amount and the schedule, not whether the expense is a need. Rent is fixed and a need; a streaming plan is fixed and a want; groceries are a need and not fixed at all, because the amount moves with every trip to the store. The test is whether next month's charge would be the same if you made no decisions between now and then. A fixed expense is changed once, by a call, a cancellation or a move, and then stays changed, which is why the fixed items decide a budget's shape before the month starts and the variable ones decide how it is run.

In a sentence

• "Rent, the car payment and the student loan alone are $1,970 of fixed expenses, gone on their dates whether or not anyone looks at the budget."
• "A $12 subscription is still a fixed expense; its size does not make it a decision, its schedule makes it fixed."
• "Groceries are not a fixed expense, even though eating is not optional. Fixed describes the amount, not the need."

How it works

Every expense answers one question: would the amount be the same next month if you decided nothing? Yes is fixed, yes but for a different amount is semi-fixed, and no is variable.

A fixed expense is not a permanent one. Rent rises at renewal, a premium changes when the policy renews, and a loan payment ends when the loan does, but each change happens at a known moment and holds until the next one. A fixed expense that comes less often than monthly, an annual renewal or a premium paid every six months, is still fixed, at one share per month set aside so the bill is covered when it lands.

Fixed share = fixed expenses ÷ take-home pay

With the semi-fixed items added, the fixed share is the committed share of the month, and what remains is the only money the month has decisions about.

An example

Take-home pay is $4,400 a month.

Half of this household's month is decided before it starts. Add the semi-fixed items, about $150 of utilities and $160 of fuel, and the committed share is $2,520, or 57%, leaving $1,880 for groceries, dining, shopping and the savings transfer. The budget's shape is set by the six lines above; the month is run on the $1,880, where a rule can move the total.

Why it matters

Fixed expenses are where a single decision saves the most. A subscription cancelled once saves its price every month with no further effort, and a bill renegotiated once repeats the saving for the length of the contract; no single decision lowers next month's grocery bill. The fixed share also sets the room: a household committed at 57% has decisions about 43% of its pay, and a budget that paces the whole paycheck as if every dollar were a choice makes the first week look fine and the last look like failure.

The mistake runs the other way too. When the committed share is above about 60% of take-home pay, the month has little room and every irregular expense becomes debt, and the lever is a fixed item, housing, a vehicle or a loan, not the grocery bill the budget has been watching.

Fixed expense versus variable expense

A fixed expense arrives at the same amount on a schedule regardless of your decisions; a variable expense changes with them, week to week. The two are managed in opposite ways: a fixed expense is audited twice a year and changed by a decision, while a variable expense is given an amount, a pace through the month and a rule. Utilities and fuel sit between the two, due on a schedule you cannot skip but varying with use and season, and they are budgeted at their twelve-month average. See Fixed versus variable expenses for finding your own split.

Common questions

Is a fixed expense the same as a need? No. Fixed describes the amount and the schedule; need describes whether you could go without it. A streaming plan is a fixed want and groceries are a variable need. See Needs versus wants for the other split.

Are groceries a fixed expense? No. The amount changes with what you buy and how often you shop, even though eating is not optional, so groceries are managed with a budget amount and a weekly rule rather than changed once.

Is a car payment fixed if I could sell the car? Yes. Fixed means the amount arrives unchanged unless you make a specific decision, and selling the car is that decision; until then the payment is the same every month.

What share of income should fixed expenses be? There is no single figure, but the higher the share, the less of the month has decisions in it. Above about 60% of take-home pay, one surprise lands on a card, and the fix is a fixed item rather than a variable one.

Where do annual bills go? They are fixed, at one twelfth of the annual amount each month, set aside so the bill is covered when it lands. See How to budget for bills that aren't monthly.

Go deeper

• Fixed versus variable expenses, and why the split decides your budget finds your own split from three months of transactions and says what to do with each kind.
• How much of the month is already spoken for computes the committed share step by step and reads what the number means for the month.
• The Budget calculator splits your monthly take-home pay into needs, wants and savings with the 50/30/20 rule or shares of your own, and shows the dollar amount each bucket gets.

Where it shows up in Zypper

Zypper finds the fixed items for you. As transactions sync, it identifies recurring groups, subscriptions, bills and utilities, loan payments, automatically from the pattern of your transactions, each with its frequency, its next expected payment and its amount. On the budget page, a bill in a spending category counts as money already spoken for in the month it is due, at its usual amount before the charge arrives, and shows as Expected, Paid, Late or Settled in the category's panel, with the row's bar extending an outline for the bills still due. Hide recurring in the budget page's display settings removes recurring payments from spending and the committed amount from the budget, leaving the discretionary picture, and the pace guide is measured against the part of the budget not committed to bills. See Recurring bills in your budget and Tracking your spending pace for the details, or get started with Zypper to see your own committed share.