Example 1
- Income: 7,500
- Expenses: 5,800
Balance +1,700
Spending 77.3% · Savings 22.7%
A typical surplus for savings or extra debt repayment.
Household Budget calculator
The household budget calculator subtracts monthly expenses from income and shows a balance plus two shares. At 7500 income and 5800 expenses you keep 1700, and spending takes 77.3% of inflows. Keep income and expenses in the same frame, net or gross.
Balance = income − expenses. 7500 and 5800 leave +1700. Months of cushion live on the emergency fund page.
Result
Monthly income and Monthly expenses. The result shows up here.
How results are calculated
A household budget on this page is two monthly totals: income and expenses. Balance = income minus expenses. Spending share = expenses ÷ income × 100%. Surplus share = balance ÷ income × 100%. There are no categories, no transfers, and no weekly calendar. The two amounts should use the same convention: both net or both gross.
At 7500 and 5800 the balance is +1700, spending 77.3%, surplus 22.7%. At 4200 and 4150 only 50 remains, a 1.2% buffer and 98.8% spending. At 5000 and 5900 the balance falls to −900 and spending reaches 118% of income.
Type Monthly income and Monthly expenses. The 6000 and 4500 placeholders are a different pair than the first card; the first example is 7500 and 5800. Click Calculate and read the balance and both shares. Blank income does not compute a percent from zero.
The emergency fund divides savings by those same monthly expenses: 15000 at 5000 of expenses is 3 months. Interest on a 1700 surplus can be sketched later on savings interest. This calculator stays with one month.
The result is a sketch. A forgotten subscription or a quarterly insurance bill will move 77.3%. A 900 deficit is not a lending decision; it is the gap between two typed numbers.
Type 7500 and 5800. Check +1700 and 77.3%. Then try 5000 and 5900 to see minus 900.
How to use the calculator
- In Monthly income, type that month's inflows, for example 7500. Keep net or gross consistent.
- In Monthly expenses, type fixed plus typical variable costs from the same month, for example 5800.
- Click Calculate. At 7500 and 5800 the balance should be +1700, spending 77.3%, surplus 22.7%.
- If you land in the red, as with 5000 and 5900 (−900), first check that both sides use the same frame.
- Months of cushion live on the emergency-fund page, using the same expenses.
Monthly balance and the spending share
Balance = income − expenses. At 7500 and 5800 you keep 1700, and spending takes 77.3% of inflows. 5000 and 5900 leave −900.
- Balance
- Income minus expenses for that month. 7500 − 5800 = +1700. At 4200 and 4150 only +50 remains.
- expenses
- The Monthly expenses field, numerator of the share. 5800 / 7500 ≈ 77.3%. At 5900 / 5000 the share hits 118%.
- income
- The denominator of both shares. Keep the same net-or-gross frame as expenses. 7500 against 5800 is a 22.7% surplus share.
Usage examples
Example 2
- Income: 4,200
- Expenses: 4,150
Balance +50
Spending 98.8% · Savings 1.2%
A thin buffer - one bill can push you into deficit.
Example 3
- Income: 5,000
- Expenses: 5,900
Balance −900
Spending 118% · Savings −18%
A deficit calls for cutting expenses or extra income/credit.
Related calculators
FAQ
What balance do 7500 income and 5800 expenses leave?
+1700. Spending 77.3%, surplus 22.7%. That is 5800 ÷ 7500 and 1700 ÷ 7500.
What about 4200 and 4150?
Balance +50, spending 98.8%, surplus 1.2%. A thin buffer.
How large is the deficit at 5000 and 5900?
−900. Spending is 118% of income, so the surplus rate is −18%.
Should income be net or gross?
Either, as long as expenses use the same convention. A mix breaks the share.
Are there rent and food categories?
No. Two totals. You add categories on paper before you type expenses.
How is this different from the emergency fund?
Here one month: income minus expenses. There savings divided by expenses, for example 15000 ÷ 5000 = 3 months.
Is the 1700 surplus a savings plan?
No. It is the remainder of two numbers. Interest on that remainder lives on another page.
What if income is 0?
A spending share has no meaning. The calculator waits for positive income before it divides.
Should I divide a quarterly bill by 3?
If you want a monthly picture, yes. The calculator does not spread a quarter for you.
Does 77.3% round on the page?
5800 ÷ 7500 = 0.77333..., and the example prints 77.3%. That is display, not a bookkeeping rule.
Knowledge sources
Balance is income minus the expenses you type. This is a month sketch, not a financial plan.
Page updated in 2026.