Free business budget calculator. Plan revenue, COGS, payroll, overhead, and marketing expenses. See gross & net margins, break-even revenue, and revenue sensitivity analysis.
The Business Budget Calculator helps entrepreneurs, freelancers, and small business owners build a clear monthly financial plan covering revenue, cost of goods sold, payroll, overhead, marketing, and additional expenses. It computes gross profit, operating profit, net profit after taxes, break-even revenue, and projects how revenue changes impact your bottom line.
Understanding your business finances requires more than a bank balance. This calculator separates your revenue into meaningful components: COGS (direct production costs that scale with sales), payroll (your team costs), overhead (fixed costs like rent and utilities), and marketing (growth investment). Each component is shown as a percentage of revenue, making it easy to benchmark against industry standards and spot inefficiencies.
The revenue sensitivity analysis is particularly valuable — it shows your net profit under ±30% revenue scenarios using the same fixed cost structure. This reveals your business's operating leverage: how a small revenue change can dramatically swing profitability. A business with high fixed costs and low COGS sees profits amplify faster, but losses deepen faster too. The break-even revenue target shows exactly how much you need to sell to cover all costs before you earn a single dollar of profit.
Every business needs to know three numbers: gross margin, operating margin, and break-even revenue. This calculator delivers all three instantly, plus a sensitivity analysis that reveals how vulnerable your profits are to revenue swings. Whether you are planning next month's marketing spend, negotiating a lease, or deciding whether to hire, these metrics guide every financial decision.
Gross Profit = Revenue − COGS Gross Margin = Gross Profit ÷ Revenue × 100 Operating Profit = Gross Profit − Overhead − Marketing − Payroll − Other Expenses Net Profit = Operating Profit − Taxes Net Margin = Net Profit ÷ Revenue × 100 Break-Even Revenue = Fixed Costs ÷ Gross Margin % where Fixed Costs = Overhead + Marketing + Payroll + Other Expenses
Result: Gross: $18,000 (60%) · Operating: $1,200 (4%) · Net: $900 (3%) · Break-even: $28,333
A $30,000/month business with $12,000 COGS has a healthy 60% gross margin. However, after $16,000 in operating expenses (payroll, overhead, marketing), operating profit drops to just $1,200 (4% margin). After 25% taxes, net profit is $900. The break-even revenue of $28,333 means a 6% revenue drop eliminates all profit — the business has thin operating leverage.
Profitability has three levels: gross, operating, and net. Gross margin measures production efficiency — how much you keep after direct costs. Operating margin shows business efficiency — how well you manage overhead, people, and marketing relative to revenue. Net margin is the bottom line after taxes. A healthy business improves all three over time. If gross margins are good but operating margins are thin, the problem is in overhead or headcount. If both are thin, the pricing or business model needs reassessment.
Operating leverage is the relationship between fixed costs and profit. Businesses with high fixed costs (software companies, manufacturers with expensive equipment) have high operating leverage: revenue increases flow disproportionately to profit, but revenue decreases also disproportionately destroy profit. A business with 70% fixed costs sees profit swing wildly with small revenue changes. Understanding this leverage — shown in the sensitivity table — helps you plan cash reserves for downturns and set aggressive growth targets during upturns.
Payroll is often the largest business expense. A full-time employee at $60,000 salary actually costs $75,000-$85,000 with benefits, taxes, equipment, and management overhead. Before hiring, calculate: will this role generate or save more than its fully-loaded cost? For intermittent needs, outsourcing to contractors often provides better cost efficiency. Use this calculator to model the impact of adding headcount — enter the additional payroll and see how it changes your break-even and net margin.
Gross profit is revenue minus cost of goods sold (direct costs). Net profit subtracts all expenses — COGS, payroll, overhead, marketing, and taxes. Gross margin shows production efficiency; net margin shows overall business profitability. A business can have great gross margins but poor net margins if overhead is too high.
Gross margins vary widely by industry. Service businesses typically see 50-80%, retail 25-50%, restaurants 60-70% on food cost. Software/SaaS businesses often exceed 80%. The key is benchmarking against your specific industry and trending the metric over time — declining margins signal pricing or cost problems.
Break-even revenue is the monthly sales needed to cover all fixed and variable costs before generating profit. Below this number, the business loses money; above it, every additional dollar has high profitability. Its formula is Fixed Costs ÷ Gross Margin %. Knowing your break-even is essential for pricing decisions and growth planning.
The SBA recommends small businesses spend 7-8% of gross revenue on marketing if revenue is under $5 million. B2B companies typically spend 2-5% of revenue; B2C companies 5-10%. Startups in growth phase may invest 15-20%. The right amount depends on your customer acquisition cost and lifetime value.
Most financial advisors recommend 3-6 months of operating expenses in business reserves. At minimum, keep 1-2 months. This buffer handles slow periods, unexpected expenses, and seasonal fluctuations without requiring emergency loans or credit card debt.
Review monthly against actuals to catch variances early. Do a detailed quarterly review to adjust projections based on trends. Annual reviews should reassess all major assumptions: pricing, headcount plans, marketing strategy, and lease terms. Monthly review takes 30 minutes; quarterly review 2-3 hours.