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Business Budget Calculator

Estimate your business budget by comparing monthly revenue, fixed costs, variable costs, and a contingency amount.

Your Details

Overview

A business budget calculator helps you compare expected monthly income with fixed costs, variable costs, and a contingency buffer so you can estimate whether your business is running at a surplus or a shortfall.

How it works

The calculator adds your monthly revenue and other income to find total income. It then adds fixed and variable costs to find planned expenses, applies your contingency percentage to create a buffer, and calculates total expenses. Your net budget is total income minus total expenses. It also shows the expense ratio and net margin as percentages of income.

How to use this calculator

  1. 1Enter your expected monthly revenue.
  2. 2Add any other regular monthly income.
  3. 3Enter your fixed monthly costs.
  4. 4Enter your variable monthly costs.
  5. 5Choose a contingency rate for unexpected expenses.
  6. 6Review your estimated net budget, total expenses, and margin.

Example Calculation

Monthly Revenue

$20,000

Monthly Fixed Costs

$8,000

Monthly Variable Costs

$5,000

Contingency Rate

5%

Other Monthly Income

$1,000

Net Monthly Budget

$7,350

With $20,000 in monthly revenue, $1,000 in other income, $8,000 in fixed costs, $5,000 in variable costs, and a 5% contingency, total expenses are about $13,650 and the estimated net monthly budget is about $7,350.

Frequently asked questions

What does this business budget calculator estimate?

It estimates your monthly surplus or shortfall by comparing total income with fixed costs, variable costs, and a contingency amount.

What should I include in fixed costs?

Fixed costs usually include rent, software subscriptions, insurance, base payroll, and other expenses that do not change much month to month.

What should I include in variable costs?

Variable costs often include materials, packaging, shipping, commissions, utilities, and other expenses that move with sales or activity.

Why use a contingency rate?

A contingency rate adds a buffer for unexpected expenses so your budget is more realistic and less sensitive to small cost overruns.

Does this calculator include tax?

Not automatically. If you want tax or other charges included, add them into your cost inputs or treat them as part of your contingency.

Can I use this for startups or side businesses?

Yes. It can be used for small businesses, startups, freelancers, and side projects as a simple monthly budgeting estimate.

Explore Related Calculators

Business Expense CalculatorEstimate your total business expenses, monthly profit and expense ratio based on revenue and common operating costs.Calculate →Fixed Costs CalculatorEstimate your total fixed business costs and the average fixed cost per month, week, day, or unit sold.Calculate →Variable Costs CalculatorEstimate your total variable costs, variable cost per unit, contribution margin, and break-even sales volume based on production and pricing inputs.Calculate →Operating Cost CalculatorEstimate your total operating costs, cost per unit, and operating profit based on fixed costs, variable costs, sales volume, and selling price.Calculate →

Assumptions and warnings

Assumptions

  • Results are monthly estimates based on the figures you enter.
  • Revenue and other income are treated as received within the same month.
  • The contingency amount is applied to fixed and variable costs only.
  • Taxes, financing costs, depreciation, and one-off items are excluded unless you include them in your inputs.

Warnings

  • This calculator provides an estimate only and is not financial advice.
  • Actual business results may differ due to seasonality, timing differences, pricing changes, and unexpected costs.