Business Budget Calculator
Build a monthly P&L budget and track variance between planned and actual figures for any small business.
💼 What is a Business Budget Calculator?
A business budget calculator is a financial planning tool that helps you build a profit and loss (P&L) projection for your business. You enter your expected revenue and cost categories, and the calculator instantly shows gross profit, operating income, net profit, and key margin percentages. The result is a one-page financial picture of your business for any given month, along with an annual projection.
Businesses use budget calculators across many stages and purposes. A startup founder might use it to project whether the business will be cash-flow positive at a given revenue level. A restaurant owner might enter current revenue and cost of goods to see if the kitchen margin is healthy enough to cover rent and payroll. A freelance consultant might use it to plan how much they need to bill each month to hit a target annual income. The Variance Analysis mode is particularly useful for monthly management reviews: enter what you budgeted versus what actually happened, and the tool flags each line item as favorable or unfavorable.
The P&L structure used in this calculator follows the standard income statement format: Revenue minus COGS gives Gross Profit. Gross Profit minus Operating Expenses gives Operating Income (also called EBIT: Earnings Before Interest and Taxes). Operating Income minus Tax gives Net Profit. This is the same structure used by public company financial statements, private business reviews, and loan applications. Knowing gross margin separately from net margin helps you identify where profitability problems originate: a low gross margin signals pricing or supplier cost issues, while a healthy gross margin but low net margin points to overhead spending.
This calculator is designed for small business owners, entrepreneurs, freelancers, and finance students who need a fast, accessible budget tool without the complexity of spreadsheet software. Default values reflect a realistic small business scenario ($50,000 monthly revenue, 40% COGS, $21,500 operating expenses), so the pre-calculated result on page load gives you an immediate reference point to adjust from.
📐 Formula
📖 How to Use This Calculator
Steps
💡 Example Calculations
Example 1 - Small Retail Business
Monthly revenue $50,000, COGS 40%, $21,500 operating expenses, 25% tax
Example 2 - Consulting Firm (Higher Revenue, Higher Margins)
Monthly revenue $75,000, COGS 20%, $28,000 operating expenses, 28% tax
Example 3 - Variance Analysis (Month-End Review)
Revenue came in above budget; COGS over budget; OpEx under budget
❓ Frequently Asked Questions
🔗 Related Calculators
How do I calculate net profit from a business budget?
Net profit = Revenue minus COGS minus Operating Expenses minus Tax. Step by step: start with total revenue. Subtract cost of goods sold (COGS) to get gross profit. Subtract all operating expenses (salaries, rent, marketing, other) to get operating income. Multiply operating income by the tax rate to find tax. Subtract tax from operating income to get net profit. Net margin = net profit divided by revenue, expressed as a percentage.
What is a good gross margin for a small business?
Typical gross margins vary widely by industry. Retail businesses often run 20-50%, professional services 50-70%, software (SaaS) 60-80%, restaurants 60-70% on food alone, and manufacturing 20-40%. Gross margin = (Revenue minus COGS) divided by Revenue, expressed as a percentage. A higher gross margin means more revenue is available to cover operating expenses and generate profit. Compare to industry benchmarks rather than using a single universal target.
What is the difference between gross profit and net profit?
Gross profit is revenue minus cost of goods sold (COGS). It measures the profitability of your core product or service before accounting for overhead. Net profit (also called net income or the bottom line) is gross profit minus all operating expenses minus taxes. A business can have a healthy gross margin but poor net profit if operating expenses (salaries, rent, admin) are too high. Tracking both numbers helps identify whether profitability problems stem from pricing/COGS or from overhead costs.
How do I calculate budget variance?
Budget variance = Actual amount minus Budgeted amount. For revenue items, a positive variance (actual greater than budget) is favorable. For expense items (COGS, operating expenses), a negative variance (actual less than budget) is favorable. Variance percentage = variance divided by budget amount, multiplied by 100. The Variance Analysis mode in this calculator applies these rules automatically and labels each line as Favorable or Unfavorable.
What percentage of revenue should operating expenses be?
As a rough guideline for small businesses: salaries and wages typically represent 20-35% of revenue, rent and utilities 5-10%, marketing 5-15%, and other expenses 2-5%. Total operating expenses often run 40-60% of revenue for service businesses and 20-40% for product businesses (which have higher COGS but lower OpEx). These ratios vary significantly by industry, business model, and growth stage. Early-stage companies often spend more on marketing and staff as a percentage of revenue than mature ones.
What does COGS include in a small business budget?
Cost of Goods Sold (COGS) includes all direct costs to produce or deliver what you sell. For a product business: raw materials, manufacturing labor, packaging, and freight. For a service business: direct labor hours billed to clients, subcontractor costs, and direct project expenses. COGS does not include overhead like rent, admin salaries, or marketing, which go under operating expenses. For retailers, COGS is simply the wholesale cost of products sold.
How do I create a monthly budget for a small business?
Start with revenue: estimate monthly sales by channel or product. Estimate COGS as a percentage of revenue or fixed per-unit amount. List fixed operating expenses (rent, salaried staff, subscriptions). Estimate variable operating expenses (hourly wages, commissions, utilities). Apply your effective tax rate to operating income. The result is your projected net profit.
What is operating income and how is it different from net income?
Operating income (also called EBIT: Earnings Before Interest and Taxes) is gross profit minus operating expenses. It measures profit from core business operations before interest costs and income tax. Net income is operating income minus interest expense minus income tax. For small businesses without significant debt, operating income and pre-tax income are often very similar. This calculator shows operating income and then subtracts tax to give net income, assuming no interest expense.
Why is annual net profit shown in the budget calculator?
Monthly figures help with cash flow planning but annual net profit is the number that matters for tax returns, investor reporting, and business valuation. Annual net profit = monthly net profit times 12 (for steady businesses). This calculator shows both so you can plan month to month while keeping the annual target in view. If your monthly net profit is negative, the annual figure shows how much of your reserves you would consume in a full year.
How does tax rate affect net profit in a budget?
Tax amount = max(Operating Income, 0) times Tax Rate. If operating income is negative (a loss), no tax is owed. As the tax rate slider increases, net profit decreases proportionally. A tax rate of 25% means you keep 75% of operating income as net profit, while 30% means you keep only 70%. Effective tax rates for US small businesses typically range from 15-30% depending on entity type (LLC, S-corp, C-corp) and deductions. Consult a tax professional for your actual effective rate.