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Monthly Expense Calculator
Add up everything you spend in a typical month and see how it stacks up against your take-home pay. Fill in each category, then press Calculate to find your leftover and savings rate.
Written by TopicDrill Editorial Team·Updated June 2026
Where the money goes
- Housing39%
- Utilities6%
- Food16%
- Transport10%
- Insurance8%
- Debt payments9%
- Entertainment6%
- Other5%
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How the monthly expense calculator works
The tool adds up every category you enter to find your total monthly outflow, then subtracts it from your take-home pay to show what is left. A positive number is the cash you can save or invest each month, while a negative number flags a budget that spends more than it earns.
The donut chart turns those numbers into proportions, so a category that quietly eats a third of your budget becomes obvious. Most households find housing is the largest slice, and seeing it sized against everything else makes it easier to decide where to cut.
A quick example
Suppose you take home $5,000 a month and your categories add up to $3,800. You are left with $1,200, a savings rate of 24 percent, and a clear picture that housing at $1,500 is your single biggest cost. From there you can test what trimming any one line would do to the leftover.
Things to keep in mind
Annualise irregular bills before you enter them, and revisit the calculator after any raise, move, or rate change so the picture stays honest. For a structured way to assign every dollar, the popular 50/30/20 framework is explained well by the Consumer Financial Protection Bureau. Once you know your leftover, see how fast debt could disappear with our debt payoff calculator.
Frequently asked questions
What counts as a monthly expense?
A monthly expense is any recurring cost you pay to run your life, such as rent, utilities, groceries, transport, insurance and debt payments. For bills that arrive quarterly or yearly, divide the total by the number of months they cover so every line is on the same monthly basis.
What is a good savings rate?
Many planners suggest aiming to keep at least ten to twenty percent of take-home pay after expenses, but the right number depends on your goals and stage of life. This tool shows your savings rate as the share of income left over once every category is filled in, so you can see where you stand.
Should I use gross or take-home income?
Use take-home pay, the amount that actually reaches your bank account after tax and payroll deductions. Comparing expenses to gross income overstates how much you really have to spend, which makes a budget look healthier than it is.
Why split spending into categories?
Breaking spending into categories shows which areas dominate your budget, so you can target the biggest line for cuts. The donut chart highlights the largest category at a glance, which is usually housing for most households and the most useful place to start trimming.
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