Budget Calculator
Zero-based budgeting in 60 seconds. Give every dollar a job. No spreadsheets required.
Expenses by Category
Calculated locally. Share links keep values after #.
These calculators provide estimates for educational purposes only. Results are not guaranteed and should not be treated as financial advice. Always consult a qualified professional before making major financial decisions.
A $5,000 monthly income with no budget becomes $4,200 in random spending. That is $9,600 per year of invisible outflow. A zero-based budget -- where every dollar has a job -- recaptures most of that. The average American wastes $200/month on forgotten subscriptions, unused gym memberships, and impulse purchases they cannot even remember.
Read more - how it works, tips & FAQs
How to use this calculator
- Enter your total monthly after-tax income from all sources (salary, side hustles, passive income).
- Add your fixed expenses: rent/mortgage, utilities, insurance, debt minimums, and subscriptions.
- Add your variable expenses: groceries, dining out, transportation, entertainment, and other regular costs.
- The calculator shows your surplus or deficit, and suggests a 50/30/20 allocation for needs, wants, and savings.
How to calculate this by hand
Income – Expenses = Surplus (or Deficit)
A zero-based budget assigns every dollar a job: income minus all expenses (needs + wants + savings) should equal zero. If the result is negative, you are spending more than you earn. If positive, redirect the surplus to your highest-priority goal.
What does a 50/30/20 budget look like on $5,000/month?
- After-tax income: $5,000/month
- 50% needs ($2,500): rent $1,200, utilities $200, groceries $400, insurance $300, minimum debt $400
- 30% wants ($1,500): dining out $400, entertainment $300, travel $300, shopping $300, hobbies $200
- 20% savings ($1,000): emergency fund $400, retirement $400, other goals $200
- Result: every dollar assigned, zero deficit, intentional spending
- Without a budget: $5,000 income, $4,800 spending, $200 in unaccounted outflow per month
Result: The budgeted household saves $12,000/year in a targeted way. The unbudgeted household wonders where the money went.
Tips
- Use the 50/30/20 as a ceiling, not a target: If your needs are 40% of income, that is great -- put the extra 10% into savings or debt. The rule is a sanity check, not a straitjacket. The lower your fixed costs, the more financial flexibility you have.
- Build sinking funds for irregular expenses: Car insurance due annually? Holiday gifts? Divide the annual cost by 12 and save that amount each month. When the bill arrives, the money is ready. No scrambling, no credit card debt for predictable expenses.
- Do a subscription audit every 90 days: The average person has 12 subscription services and is actively using 6. The other 6 cost $75-150/month. Set a recurring calendar reminder to cancel anything unused in the last 90 days.
- Budget for fun or the budget will not stick: The most common reason budgets fail is deprivation. If you allocate $0 for dining out, entertainment, or hobbies, you will quit within 3 weeks. Include a realistic wants category from day one.
Common mistakes to avoid
- Forgetting annual or quarterly expenses - Budget as if every month is the same. Car insurance $1,200/year = $100/month. Put it in a separate savings account automatically. When the bill comes, you have the cash and your monthly budget does not break.
- Making the budget too restrictive - If your budget requires willpower every single day, it will fail. Leave 5-10% of income as a buffer for unplanned spending. Flexibility is what makes budgets sustainable, not perfection.
- Not tracking at all and wondering why - A budget without tracking is a wish. Use a simple app or a 5-minute weekly check-in. People who track their spending save 15-20% more than those who only set a budget and forget it.
Average US Household Spending Breakdown (2026)
| Category | % of Income | Monthly (~$5.8K gross) | Budget Rule |
|---|---|---|---|
| Housing | 33% | $1,914 | Keep under 28-30% |
| Transportation | 16% | $928 | Keep under 15% |
| Food | 12% | $696 | Groceries + dining |
| Insurance/Pensions | 12% | $696 | Include health, life, retirement |
| Healthcare | 8% | $464 | Even with insurance |
| Entertainment | 5% | $290 | First to cut when over |
| Apparel | 3% | $174 | Discretionary |
| Other | 11% | $638 | Misc + savings target |
FAQ
How do I budget with irregular income?
Use your lowest-earning month of the past 12 months as your base budget. Anything above that goes to savings, debt, or skill-building. Freelancers and gig workers need a 3-6 month expense buffer more than salaried employees.
What percentage of my income should go to rent?
The 30% rule is a guideline, not a law. In high-cost cities, 40-50% is common. The key question: after paying rent, can you still save 10%+ and cover essentials? If not, you need more roommates or a higher income.
How do I budget with my partner without fighting?
Have a shared budget meeting once per month. Use a joint account for shared expenses and individual accounts for personal spending. Each partner gets the same amount of no-questions-asked money.
Related resources
- How to Save with a Savings Goal Calculator - Reverse-engineer your monthly savings to hit any financial target.