π° Budget Calculator
Income in, expenses out, truth revealed.
Income minus expenses
Estimates for planning only, not financial advice.
A budget is income minus expenses with every dollar assigned a job. With $6,800 of monthly take-home pay and $5,940 of expenses, the surplus is $860 and the savings rate is 12.6 percent: positive, but short of the 20 percent target. The calculator below breaks spending into six categories, computes the surplus or deficit, the savings rate, and each category's share of income, so the leak shows itself instead of hiding in a bank balance.
How to Use This Calculator
Enter monthly take-home pay (after tax and deductions) and spending in the six categories. Use three months of actual statements, not guesses: guessed budgets describe an imaginary person. The calculator shows surplus, savings rate, and where the money goes.
Enter take-home income. Multiple earners: combine. Irregular income: use your worst realistic month.
Enter spending per category from real statements. Put subscriptions, dining out, and shopping in Everything Else honestly.
Read the surplus and savings rate. Under 20%: find the redirect. Negative: cut or earn, today. Then automate the surplus with our savings goal calculator targets.
The Math
Simple arithmetic, uncomfortable answers. The example: $2,100 + $650 + $800 + $420 + $550 + $1,420 = $5,940. Surplus: $6,800 - $5,940 = $860. Savings rate: $860 / $6,800 = 12.6%. Housing share: $2,100 / $6,800 = 30.9%, right at the edge of the 30 percent guideline. Everything Else at $1,420 is 20.9 percent: the category where the missing savings usually hides.
Worked Example: $6,800 In, $5,940 Out
Income: $6,800. Expenses: housing $2,100, transport $650, food $800, utilities $420, debt $550, other $1,420. Total: $5,940. Surplus: $860/month, $10,320/year. Savings rate: 12.6%.
The 50/30/20 verdict: needs (housing, transport, utilities, food, debt minimums) run about $4,920 or 72% of income: over the 50% line, mostly because housing costs what housing costs. The path to 20% savings ($1,360) needs $500 more: cutting Everything Else from $1,420 to $920 closes it exactly, lifting the rate from 12.6% to 20.0%. One category, honestly audited, funds the entire gap.
Where the Money Goes
| Category | Example | Share of income | Guideline |
|---|---|---|---|
| Housing | $2,100 | 30.9% | Under 30% |
| Transport | $650 | 9.6% | Under 15% |
| Food | $800 | 11.8% | 10-15% |
| Utilities & bills | $420 | 6.2% | 5-10% |
| Debt payments | $550 | 8.1% | Minimums here |
| Everything else | $1,420 | 20.9% | The audit zone |
The table's message: four categories are within guidelines, housing is a touch high, and Everything Else is where discipline lives or dies. Anyone whose "other" exceeds 20 percent of income has a subscription, dining, or shopping habit they have not confronted yet.
Making the Budget Stick
Budgets fail in three predictable ways: guessed numbers (fix with statements), no review (fix with a monthly 20-minute check), and manual transfers (fix with automation). Automate the surplus on payday: 401(k) contributions, automatic transfers to high-yield savings, automatic extra debt payments. Money moved before you see it does not get spent.
Priority order for the surplus: a $1,000 starter emergency buffer, high-interest debt above 8 percent, a full 3-6 month emergency fund, then investing beyond the employer match. Our debt payoff planner sequences the debt attack, the emergency fund calculator sizes the buffer, and the 50/30/20 calculator gives the framework version of this same math. Review quarterly; rebuild after any income or housing change.
Budget Systems Compared
Three systems dominate, and the best one is the one you will actually run. The 50/30/20 rule is the simplest: three buckets, no tracking apps, reviewed monthly. Zero-based budgeting is the most precise: every dollar assigned, which suits detail-oriented people and variable incomes. Pay-yourself-first is the most behavioral: automate savings off the top and spend the rest guilt-free, which works for people who hate tracking.
Envelope budgeting, digital or cash, is the classic for overspenders: fixed amounts per category, and when the grocery envelope is empty, meals come from the pantry. Values-based budgeting flips the framing: fund what you love generously and cut what you do not care about ruthlessly, which is more sustainable than uniform frugality. All five systems agree on the fundamentals: spend less than you earn, automate the gap, and review regularly. Pick the one that matches your personality, because the perfect system you abandon in February loses to the good-enough one you run all year.
The final habit is the annual reset: once a year, rebuild the budget from zero instead of adjusting last year's. Income, housing, insurance, and subscriptions all drift, and incremental tweaks preserve outdated assumptions. A fresh zero-based pass each January catches the creep that monthly reviews miss, and it takes less than an hour with a year of statements in front of you.
Start tonight with the smallest version: write down every expense from the last 30 days, sorted into the six categories above. That single exercise, done honestly, teaches more than any budgeting book. The numbers will surprise you somewhere; that surprise is the budget working before you have even finished building it.
Estimates for planning only, not financial advice.
Frequently Asked Questions
How do I make a monthly budget?
List all take-home income, list every expense by category, subtract. With $6,800 income and $5,940 expenses, the surplus is $860 and the savings rate is 12.6%. Then give the surplus a job before it evaporates: emergency fund, debt payoff, or investing, in that order.
What is the 50/30/20 budget rule?
Spend 50% of after-tax income on needs, 30% on wants, and 20% on savings and debt payoff. On $6,800: $3,400 needs, $2,040 wants, $1,360 savings. Our example's 12.6% savings rate falls short of 20%, signaling $500 more to redirect. Our <a href="/finance/50-30-20-rule">50/30/20 calculator</a> splits any income automatically.
What should my savings rate be?
At least 20% of take-home pay is the standard target: enough to build an emergency fund, capture employer 401(k) matches, and make real retirement progress. Under 10% means you are treading water; over 30% puts you on a fast track. The rate matters more than the dollars because it scales with raises.
How do I budget with irregular income?
Budget on your worst realistic month, not the average: base the plan on the low month and treat extra income as bonus savings. Or use zero-based budgeting where every dollar of actual inflow gets assigned when it arrives. The fixed-average method fails freelancers because the average month never actually happens.
What is zero-based budgeting?
Every dollar of income is assigned to a category, savings, or debt until income minus allocations equals zero. It is not about spending everything: savings is a category. The discipline is intentionality: no dollar sits unassigned where lifestyle creep can quietly claim it.
How do I find money in a tight budget?
Audit three months of statements and attack the big three: housing, transport, food, which together swallow 60%+ of most budgets. Then the subscriptions audit: the average household carries 4-5 forgotten recurring charges. Cutting $200 of wants from our example lifts the savings rate from 12.6% to 15.6% with no lifestyle drama.
Should I budget before or after paying debt?
Debt payments above minimums count as savings in most frameworks (they build net worth), but minimums are expenses. Budget the minimums as fixed costs, then allocate the surplus between extra debt payoff and savings by interest rate: kill high-rate debt first, then split between investing and reserves.
How big should my emergency fund be?
Three to six months of essential expenses, held in a high-yield savings account. Our example's $5,940 monthly spend implies $17,820 to $35,640. Build it before investing beyond the 401(k) match: without the buffer, every surprise becomes high-interest debt that undoes the investing.
What is lifestyle creep and how do I stop it?
Spending rising with income so the savings rate never improves: the $10k raise that becomes a $10k lifestyle. The fix is automatic: save half of every raise the day it hits, before you adapt to the new number. Lifestyle is sticky downward, so intercept the money upstream.
How often should I review my budget?
Monthly for the first 3-6 months while you learn your real spending, then quarterly once it is stable, plus a full review after any income or housing change. A budget is a living plan, not a January resolution: the review is where the value compounds.