Simple Budget Calculator
Enter your monthly income and expenses to see your total spending, remaining balance, and what percentage of income goes to each category.
Enter your monthly income and expenses
Fill in your take-home pay and estimated monthly spending in each category.
$650 remaining
You are spending $3,350 of your $4,000 monthly income.
How to use this calculator
Enter your monthly take-home income (the amount deposited into your bank account after taxes). Then fill in your estimated or actual monthly spending for each category. The calculator totals your expenses, shows how much is left over, and identifies which category takes the largest share of your income. If your expenses exceed your income, the remaining balance will show as negative.
Tips for success
- Try the 50/30/20 rule. 50% of take-home pay toward needs (housing, utilities, groceries, insurance), 30% toward wants (entertainment, dining out), and 20% toward savings and debt repayment.
- Watch the housing line. Housing costs above 30% of gross income often strain a budget. If your housing exceeds 35-40% of take-home pay, look for ways to reduce other categories to compensate.
- Track for a month before targeting. Most people underestimate groceries and personal spending by 20-30%. Pull actual numbers from bank statements before setting budget caps.
- Build a 3-6 month emergency fund. Covering essential expenses prevents one unexpected bill from derailing your entire financial plan.
- Review quarterly. Income changes, seasonal expenses (heating, holidays), and life events all shift what a realistic budget looks like.
Reading your results
- Total expenses: The sum of all nine spending categories. This is the number shown in the center of the chart.
- Remaining balance: Your take-home income minus total expenses. A positive number means you have room for additional savings or unplanned costs. A negative number means you are overspending.
- % of income spent: How much of your paycheck goes to expenses. Under 80% is generally healthy and leaves a buffer for savings and surprises.
- Largest category: The single category consuming the biggest share of your income. For most people this is housing. If a discretionary category like personal spending tops the list, it may be worth a closer look.
Common budgeting mistakes to avoid
- Forgetting irregular expenses: Car registration, annual subscriptions, holiday gifts, and home repairs happen every year but not every month. Divide annual costs by 12 and include them in your monthly budget.
- Budgeting gross income instead of net: Always use take-home pay. Budgeting with pre-tax income creates a gap that grows every month.
- Setting unrealistic targets: Cutting your grocery budget in half or eliminating all entertainment rarely sticks. Reduce by 10-15% at a time and adjust gradually.
- Not accounting for savings as an expense: Treat savings like a bill you pay yourself. If savings is whatever is left at the end of the month, there is usually nothing left.
FAQ
What counts as take-home income?
Take-home income is the amount deposited into your bank account after federal and state taxes, Social Security, Medicare, health insurance premiums (if deducted from your paycheck), and retirement contributions are removed. If you have multiple income sources (a side job, freelance work, rental income), add them together.
What if my expenses exceed my income?
A negative remaining balance means you are spending more than you earn each month. This is unsustainable and typically covered by credit cards or savings drawdowns. Review each category for reduction opportunities, starting with the largest discretionary items like dining out, subscriptions, and personal spending.
How much should I spend on housing?
The traditional guideline is no more than 28-30% of gross income on housing, which translates to roughly 35-40% of take-home pay depending on your tax bracket. In high-cost areas this may not be realistic, but exceeding 40% of take-home pay on housing leaves very little room for other essentials and savings.
Should I include savings as an expense?
Yes. Treating savings as a fixed monthly expense (like rent or a car payment) is one of the most effective budgeting strategies. Automate a transfer to savings on payday so the money moves before you have a chance to spend it.
How often should I update my budget?
Review your budget monthly for the first three months to calibrate your estimates against reality. After that, a quarterly review works well for most people. Update immediately after any major income change, move, or life event like a new child or job transition.