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Business Budget Calculator

Sketch your monthly budget in a minute: revenue in, expenses out, and your net profit and margin calculated live. Then let ReInvestWealth track the real numbers automatically.

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30 days free · Cancel anytime · Built by CPAs
Revenue / month$10,000
Total expenses / month$7,700
Profit margin23%
Net profit / month$2,300

Enter monthly numbers; the annual view multiplies by 12. Before-tax estimate: set aside for income tax out of the net profit.

How to budget for a business

Three steps, repeated monthly. The math is subtraction; the discipline is comparing the plan to what actually happened.

A budget is a plan. Your bookssay if it's working.

ReInvestWealth categorizes your real revenue and expenses automatically, so comparing plan to reality takes minutes, not a spreadsheet evening.

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  • Unlimited Bank Connections
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  • AI Bookkeeper (Trained by CPAs)
  • Unlimited Invoicing (Stripe)
  • Real-Time Financial Reports
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  • Bank Statement Uploads
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  • Full Audit Trail
  • Accountant-Ready Exports
  • Free Done-for-You Migration
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FAQ

Business budgeting, explained

How do I create a budget for my business?

Start with realistic monthly revenue (base it on recent months, not the best month ever). List your fixed costs (rent, payroll, software), then your variable costs (marketing, inventory, supplies), and subtract everything from revenue. What's left is your net profit, and net profit ÷ revenue is your margin. The calculator above does the math live as you fill in each category.

Can I use this instead of a business budget template?

Yes. A spreadsheet business budget template makes you build and maintain the formulas yourself; here you just type the numbers and the math stays right. It works as a monthly business budget, and multiplying by twelve gives you a simple annual operating budget.

What percentage of revenue should each expense be?

There's no universal split; benchmarks vary widely by industry. Service businesses often keep payroll (including the owner's pay) under 40% to 50% of revenue, marketing commonly runs 5% to 15%, and rent is healthiest under 10%. Treat the percentages in your budget as hypotheses, then compare them against your real numbers monthly and adjust the plan, not just the spending.

What's a healthy profit margin for a business?

As a rough guide, a 10% net margin is solid, 20% is strong, and under 5% deserves attention. Margins differ a lot by industry (software and services run higher, retail and food run thinner), so compare against your own trend first: a margin that improves quarter over quarter beats an arbitrary benchmark.

What's the difference between a budget and a cash flow forecast?

A budget plans profitability: expected revenue minus expected expenses over a period. A cash flow forecast plans timing: when money actually enters and leaves your account, including things a budget ignores like invoices paid 30 days late, loan principal payments, and sales tax remittances. A profitable budget can still hit a cash crunch, which is why growing businesses eventually need both.

How much should I set aside for taxes in my budget?

A common starting point for US business owners is 25% to 30% of net profit, adjusted for your bracket, state, and self-employment tax once you know them. If you expect to owe $1,000 or more for the year, the IRS expects quarterly estimated tax payments, so build them into the monthly plan rather than facing four surprise bills.

How often should I update my budget?

Monthly. A budget is a set of guesses, and the value comes from comparing the guesses to your actual numbers, then adjusting. That comparison is the part ReInvestWealth automates: your real revenue and expenses are categorized as they happen, so checking budget vs actuals takes minutes instead of an evening of spreadsheet work.

Is this budget calculator free?

Yes, it's free with no sign-up required. ReInvestWealth is accounting software that tracks your actual revenue and expenses automatically, so you can see how your real months compare to the plan you just built. You can start a free 30-day trial anytime.

Budget the plan. Automate the actuals.

ReInvestWealth tracks your real revenue and expenses automatically, so every month you know exactly how the plan held up.