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Calculator · business

Business Budget Calculator

Calculate monthly net profit by entering revenue, COGS, operating expenses, payroll, and state to get an instant business budget breakdown.

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Inputs

Monthly Revenue

Cost of Goods Sold (COGS)

Operating Expenses

Payroll & Benefits

State (for Corporate Income Tax)

Monthly Net Profit

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Get a plain-English breakdown of your result with practical next steps.

Monthly Net Profit—

The formula

How the
result is
computed.

How the Business Budget Calculator Works

The business budget calculator uses a proven net profit formula to give business owners a clear monthly financial snapshot. By entering revenue, cost of goods sold (COGS), operating expenses, payroll, and the business registration state, users receive an accurate net profit or loss figure instantly. This tool draws on the same cost-separation methodology recommended by the U.S. Small Business Administration for startup and ongoing cost planning.

The Core Net Profit Formula

The calculator applies this foundational accounting equation:

Net Profit = Revenue − (COGS + Operating Expenses + Payroll + Taxes)

Each variable represents a distinct cost category, making it easy to isolate problem areas and optimize spending. A business bringing in $75,000 per month but spending $68,000 across all categories earns a net profit of $7,000, or a 9.3% profit margin.

Breaking Down Each Variable

Monthly Revenue: Total income from all business activities before any deductions. A retailer earning $40,000 in product sales plus $5,000 in service contracts enters $45,000 here.
Cost of Goods Sold (COGS): Direct costs tied to producing what the business sells, including raw materials, direct labor, packaging, and inbound freight. According to Mass.gov's guide to calculating costs and setting prices, separating COGS from overhead is essential for accurate pricing and true profitability analysis. A bakery spending $9,000 on flour, sugar, and baker wages enters that figure as COGS.
Operating Expenses: Indirect overhead costs such as rent, utilities, marketing, insurance, and software subscriptions. These costs persist regardless of production volume. A small office might pay $2,500 in rent, $350 in utilities, $600 in software, and $800 in digital advertising, totaling $4,250 in monthly operating expenses.
Payroll & Benefits: Total employee compensation including base salaries, hourly wages, health insurance contributions, and retirement plan matches. A business with four employees averaging $3,800 per month plus $550 in benefits each would enter $17,400.
State Corporate Income Tax: The applicable state tax rate based on where the business is incorporated. Rates vary widely across the U.S., from 0% in states such as Wyoming, Nevada, and South Dakota to 11.5% in New Jersey, according to the Tax Foundation's state corporate income tax data. The calculator auto-applies the correct rate based on the selected state.

How State Corporate Tax Is Applied

Corporate income tax is calculated on pre-tax profit, not gross revenue. The calculator first subtracts COGS, operating expenses, and payroll from monthly revenue to arrive at pre-tax profit. It then multiplies that figure by the state's corporate tax rate. A business in California (8.84% rate) with $15,000 in pre-tax profit owes approximately $1,326 in state taxes, yielding a net profit of $13,674. The same business operating in Texas, which levies no state corporate income tax, keeps the full $15,000.

Real-World Monthly Budget Example

Consider a small e-commerce business with the following monthly figures:

Monthly Revenue: $60,000
COGS (inventory, shipping supplies): $21,000
Operating Expenses (warehouse rent, utilities, ads): $9,500
Payroll (3 employees plus benefits): $14,200
State: Florida (5.5% corporate income tax)

Pre-tax profit = $60,000 − $44,700 = $15,300. State tax = $15,300 × 5.5% = $841.50. Net Profit = $14,458.50, representing a 24.1% net margin. Running this calculation monthly lets the owner track whether margin improvements from pricing changes or cost cuts are actually materializing.

Why Regular Budget Tracking Drives Better Decisions

Businesses that use structured budgeting and financial forecasting are significantly better positioned to manage cash flow and secure funding. As Harvard Business School Online notes in its overview of financial forecasting methods, regular financial modeling enables leaders to anticipate shortfalls, adjust spending before cash reserves are depleted, and make evidence-based decisions about hiring, expansion, or cost reduction. Running this calculator monthly creates a reliable performance baseline that makes annual planning and investor presentations far more credible.

Reference

Frequently asked questions

What is a business budget calculator and how does it work?

A business budget calculator computes monthly net profit by subtracting all major cost categories from total revenue. Users enter monthly revenue, cost of goods sold, operating expenses, payroll and benefits, and their business registration state. The calculator applies the correct state corporate income tax rate automatically and returns net profit, delivering a complete monthly financial snapshot in a single calculation.

What is the formula for calculating net profit in a business budget?

Net Profit = Revenue minus (COGS + Operating Expenses + Payroll + Taxes). For example, a business with $80,000 in revenue, $26,000 COGS, $11,500 operating expenses, $16,000 payroll, and $2,900 in state taxes calculates: $80,000 minus $56,400 = $23,600 net profit, representing a 29.5% net margin. This formula covers all major recognized cost categories in standard business accounting.

What costs should be included in Cost of Goods Sold (COGS)?

COGS includes only direct production costs: raw materials, direct manufacturing labor, packaging, and inbound freight. It excludes rent, marketing, and administrative salaries. For a restaurant, COGS covers food ingredients and kitchen staff wages directly tied to food production. For a software company, COGS typically includes cloud hosting fees and developer hours allocated directly to building and maintaining the product.

How does state corporate income tax affect a business budget calculation?

State corporate income tax rates range from 0% in Wyoming, Nevada, and South Dakota to 11.5% in New Jersey, according to the Tax Foundation. The tax applies to pre-tax profit, not gross revenue. A business earning $20,000 in pre-tax profit in California at an 8.84% rate pays approximately $1,768 in state taxes, yielding a net profit of $18,232 compared to the full $20,000 retained in a zero-tax state.

What are typical monthly operating expenses for a small business?

Common small business operating expenses include office or retail rent ($1,000 to $10,000+ monthly depending on location), utilities ($200 to $800), business insurance ($100 to $500), software subscriptions ($200 to $1,500), marketing and advertising ($500 to $5,000), and accounting or legal professional services ($300 to $1,500). These overhead costs exist regardless of sales volume and must be covered in full before any net profit is realized.

How often should a business use the budget calculator to track financial performance?

Running the business budget calculator monthly is the minimum recommended frequency for any active business. Monthly tracking catches cost overruns, revenue shortfalls, and seasonal trends before they compound into serious cash flow problems. Harvard Business School Online notes that regular financial forecasting significantly improves strategic planning outcomes. High-growth businesses often run projections weekly to stay ahead of rapid swings in revenue or headcount-driven expense increases.