Expenses
Income vs Expenses Calculator
The single most important number in personal finance is whether more money arrives than leaves. List every income source and every expense — as few or as many lines as you need — and see your net cash flow, savings rate, and an income-versus-expenses comparison in one view.
Results
Total income: $4,000.00, Total expenses: $3,000.00, Net cash flow: $1,000.00, Savings rate: 25.0%
- Total income
- $4,000.00
- Total expenses
- $3,000.00
- Net cash flow
- $1,000.00
- Money left over every month
- Savings rate
- 25.0%
- Net cash flow ÷ total income
Line items
| Item | Type | Monthly amount |
|---|---|---|
| Salary | Income | $3,200.00 |
| Freelance | Income | $800.00 |
| Housing | Expense | $1,350.00 |
| Food | Expense | $620.00 |
| Transportation | Expense | $380.00 |
| Everything else | Expense | $350.00 |
| Debt payments | Expense | $300.00 |
How to use this calculator
- List your income sources with monthly amounts: salary, side gigs, benefits, interest. Add or rename rows freely.
- List your expenses the same way — use as many lines as you need; unlike fixed-category calculators, nothing here is forced into someone else’s buckets.
- Check net cash flow first: positive means you are building wealth, negative means you are drawing down savings or adding debt.
- Read the savings rate: under 10% is fragile, 10–20% is solid, above 20% accelerates every financial goal.
- Test one change at a time — add a planned raise to income, or cut one expense — and watch the two bars separate.
How the calculation works
net cash flow = Σ income − Σ expenses savings rate = net cash flow ÷ Σ income
Net cash flow is the ground truth of a budget: it is the amount that actually accumulates (or disappears) each month. The savings rate normalizes it against income so you can compare yourself across raises, cities, and life stages.
Worked example
Input
Incomes: $3,200 salary + $800 freelance. Expenses: $1,350 housing, $620 food, $380 transportation, $300 debt payments, $350 everything else.
Result
Total income $4,000, total expenses $3,000 → net cash flow +$1,000 per month, a 25% savings rate. At that rate, a full emergency month is saved every three months.
Assumptions and important notes
- All lines are monthly take-home figures on the same basis — mixing gross income with after-tax expenses overstates cash flow.
- Irregular income and expenses should be entered as monthly averages.
- A negative savings rate means the gap is being funded by savings withdrawals or new debt.
Frequently asked questions
What is a good net cash flow?
Any positive number is the first milestone — you are not going backwards. From there, the savings rate matters more than the dollar amount: $500 left over on $2,000 income (25%) is stronger than $800 on $8,000 (10%).
Should retirement contributions count as expenses?
For cash-flow purposes, 401(k) deductions never hit your bank account, so leave them off income and expenses — they effectively raise your savings rate without appearing here. Roth IRA contributions from your bank account can be listed either as an expense or simply left out; just be consistent month to month.
How is this different from the Budget Calculator?
The Budget Calculator uses nine fixed categories for a quick snapshot. This one accepts unlimited, fully custom lines on both sides and focuses on the bottom line — net cash flow and savings rate — rather than category benchmarks.
My income changes every month. Should I use my best guess?
Use a conservative average — the average of your last three to six months, or the lowest recent month if your expenses are rigid. Budgeting to optimistic income is the classic trigger for credit card debt in irregular-income households.
Related tools
Budget Calculator
See your monthly cash flow at a glance: total income, total expenses, remaining balance, savings rate, and a category-by-category breakdown.
Open toolSpending Calculator
Convert any habitual expense between daily, weekly, monthly, and annual amounts. See the yearly total that small habits hide.
Open toolSavings Rate Calculator
Calculate your savings rate in seconds: the share of income you keep, dollars saved per year, and where your number sits on the path to financial independence.
Open tool