Business Budget Calculator
Enter your monthly revenue and expenses to see gross profit, net profit, gross margin, net margin, and whether your budget is in surplus or deficit. The steps panel shows the full calculation with your numbers, and the breakdown chart visualises how every expense category eats into revenue.
How to use this business budget calculator
Enter your monthly revenue across three streams: product sales, service revenue, and other income (grants, interest, licensing). Then fill in your cost of goods sold and seven operating expense categories. The calculator instantly shows total revenue, gross profit, gross margin, total operating expenses, net profit, net margin, and monthly budget balance. The steps panel works through the maths with your exact numbers so you can see where every dollar goes.
Gross profit vs. net profit: what each measures
Gross profit is revenue minus the direct cost of producing goods or services (COGS). It tells you how efficiently the core business converts sales into value before you pay for overhead. Net profit is what is left after all operating expenses are also deducted. A business can have a healthy gross profit but still lose money if overhead is too high. Tracking both figures together gives a clearer picture than either one alone. Gross margin above 40% and net margin above 10% are common targets for sustainable small businesses, though benchmarks vary widely by industry.
Reading the budget balance and margin gauges
A positive budget balance means the business generates more cash than it spends each month, which is the foundation for reinvestment or reserves. A negative balance is a deficit that must be funded from savings or borrowing. The gross margin and net margin percentages are more useful than the raw profit figures because they stay comparable as the business grows: a 15% net margin on 50,000 in revenue and on 500,000 in revenue represent the same efficiency level. The net margin gauge segments are colour-coded: below 0% is a loss zone, 0-10% is thin, 10-20% is acceptable, and above 20% is generally considered healthy for most industries.
Interpreting the 12-month projection chart
The cumulative revenue and profit chart projects your current month budget forward over 12 months assuming a 5% month-on-month revenue growth rate. This is a planning model, not a forecast - real growth depends on your market, sales activity, and pricing. Use it to test scenarios: try increasing the marketing spend input and watch how the projected profit curve reacts relative to the revenue curve. The wider the gap between the two curves, the higher your profit margin at that trajectory.
Tips for cutting costs without harming growth
The most common areas where small business operating expenses can be reduced include: (1) Payroll - review whether any roles can be filled part-time or outsourced at lower total cost; (2) Software and technology - audit all SaaS subscriptions annually and cancel unused tools; (3) Marketing - shift spend from broad awareness campaigns toward channels with measurable return on ad spend; (4) Rent - consider hybrid or remote-first arrangements to reduce floor space. Reducing COGS through supplier renegotiation or ordering in larger volumes often delivers the highest leverage because it improves gross margin on every unit sold.
Net margin benchmarks by industry
| Industry | Low end | Mid range | High end |
|---|---|---|---|
| Retail (general) | 1% | 3% | 6% |
| Restaurants and food service | 2% | 5% | 9% |
| Software / SaaS | 10% | 20% | 35% |
| Professional services | 8% | 15% | 25% |
| Construction | 2% | 5% | 10% |
| Healthcare / medical | 4% | 8% | 15% |
| E-commerce | 2% | 5% | 10% |
| Manufacturing | 3% | 7% | 12% |
Typical net margin ranges across common small business industries. Source: NYU Stern School of Business data.
Frequently asked questions
What is the difference between a business budget and a cash flow forecast?
A budget is a plan: it sets targets for revenue and spending over a period. A cash flow forecast tracks when money actually enters and leaves the bank account. A business can be profitable on paper but still run out of cash if customers pay late or if large expenses fall before revenue arrives. This calculator focuses on the budget layer - profitability planning. Pair it with a cash flow forecast to manage timing.
How do I calculate gross margin for my business?
Gross margin = (revenue - COGS) / revenue x 100. For example, if you earn 47,000 in revenue and your direct costs are 14,000, gross profit is 33,000 and gross margin is 33,000 / 47,000 x 100 = 70.2%. A higher gross margin means more of each sale is available to cover overhead and generate net profit.
What should I include in cost of goods sold (COGS)?
COGS covers costs directly tied to producing your products or delivering your services: raw materials, manufacturing labour, freight in, packaging, and direct service delivery costs such as contractor fees. Do not include overhead expenses such as office rent, marketing, or administrative salaries - those belong in operating expenses. Keeping COGS and operating expenses separate lets you see gross margin clearly.
What is a good net profit margin for a small business?
It depends heavily on the industry. Software and professional services businesses often achieve 15-25% net margins. Retail, food service, and construction businesses typically run 2-8%. As a general guide, a net margin above 10% is considered acceptable and above 20% is healthy for most sectors. The reference table in this calculator shows typical ranges by industry.
How often should I update my business budget?
Review your budget monthly and compare each line to actuals. Large variances - positive or negative - deserve investigation. Many small businesses build a rolling 12-month budget that shifts forward each month, so the plan always looks a year ahead. A quarterly deep-dive to adjust targets based on changed market conditions is also common practice.
Can I use this calculator for a startup with no revenue yet?
Yes. Enter your projected revenue figures as estimates and fill in planned expenses. The calculator will show whether your plan is likely to be profitable at those projections and by how much. Startups typically model several scenarios - a conservative case, a base case, and an optimistic case - by adjusting the revenue inputs and comparing the resulting margins.
What is the OpEx-to-revenue ratio and why does it matter?
The operating expense to revenue ratio (OpEx ratio) is total operating expenses divided by total revenue, expressed as a percentage. It shows what fraction of every revenue dollar is consumed by overhead before you factor in COGS. A rising OpEx ratio signals that the business is becoming less efficient over time and may need to scale revenue faster or cut overhead.