Budget Calculator
See exactly where your monthly income goes, whether you're running a surplus or deficit, and how your spending compares to common budgeting guidelines.
Results from this calculator are estimates provided for general informational purposes only, based on formulas, rates, and standards commonly accepted as of 2026. Figures may differ slightly from other calculators or professional sources due to rounding methods, differing assumptions, or regional regulations, and rules may change over time. Always consult a qualified professional — such as a financial advisor, healthcare provider, or other relevant specialist — before making decisions based on these results.
Monthly Surplus
$1,250
Summary
With $5,300 in monthly income and $4,050 in monthly expenses, this budget leaves a $1,250 surplus (23.6% of income) each month.
Total Income
$5,300
Total Expenses
$4,050
Housing (guideline: ≤30%)
26.4%
Transportation (guideline: ≤15%)
9.4%
Food (guideline: ≤15%)
11.3%
Savings (guideline: ≥15%)
9.4%
Monthly spending breakdown
Category Breakdown
| Category | Monthly Amount | % of Income |
|---|---|---|
| Housing & Utilities | $1,400 | 26.4% |
| Transportation | $500 | 9.4% |
| Food & Dining | $600 | 11.3% |
| Other Debt & Loan Payments | $300 | 5.7% |
| Healthcare | $250 | 4.7% |
| Children & Education | $200 | 3.8% |
| Savings & Investments | $500 | 9.4% |
| Miscellaneous | $300 | 5.7% |
| Unallocated Surplus | $1,250 | 23.6% |
What is a Budget Calculator?
A budget calculator organizes your monthly income and spending into categories so you can see, at a glance, whether you're living within your means. Successful budgeting comes down to two things: living within your means, and planning for the future — which in practice means having a detailed personal budget and actually adhering to it.
This calculator totals your income against eight common expense categories, flags whether your spending in the biggest categories fits widely-used guidelines, and shows a visual breakdown of exactly where every dollar goes.
Common Budgeting Guidelines
While every household is different, several widely-cited rules of thumb help flag categories that may be out of balance:
- Housing & utilities — no more than 30% of gross monthly income
- Transportation — below 15% of income overall (car payments alone under 10%)
- Food — groceries plus dining out under 15% of income
- Savings & investments — 15% or more of income, when possible
Why Budgets Break Down
The most common barriers to a working budget are spending more than income allows, trying too hard to keep up with peers' lifestyles, over-relying on credit to bridge the gap, and simply lacking the knowledge or habit of tracking spending in the first place. A budget only works if it's revisited regularly against actual spending, not set once and forgotten.
Before-Tax vs. After-Tax Budgeting
This calculator treats income as gross (before-tax) income, matching how most budgeting guidelines are expressed. If you prefer to budget against your take-home pay instead, enter your after-tax income in the Salary field — just keep in mind the percentage guidelines above are usually calibrated against gross income, so your effective targets will look tighter.
Additional Example — Trimming a Deficit
A household earning $4,500/month with $1,800 in housing (40% of income) and only $150/month in savings (3%) is over the housing guideline and well under the savings guideline. Trimming housing costs by even $250/month — through refinancing, a roommate, or a smaller unit — could fund a meaningfully larger savings contribution without touching any other category.
Frequently Asked Questions
What if my housing costs are above 30% but I can't easily change that?
The 30% guideline is a general rule, not a hard limit — it's most useful as a flag that other categories may need to shrink to compensate, especially in high cost-of-living areas where exceeding it is common and sometimes unavoidable.
Should debt payments include my mortgage or car loan?
No — this calculator counts your mortgage or rent under Housing, and a car payment under Transportation. The "Other Debt & Loan Payments" category is meant for credit cards, student loans, and personal loans on top of those.
Is a 0% or negative surplus always a problem?
A deficit means you're spending more than you earn, which is unsustainable long-term without drawing down savings or adding debt. A surplus near 0% isn't necessarily bad if your Savings category already reflects deliberate contributions elsewhere in the budget.
How often should I recalculate my budget?
Monthly is typical, since bills and irregular expenses vary from month to month — reviewing regularly (rather than setting a budget once) is what separates a plan that works from one that quietly gets ignored.