Business Cash-Flow Forecast Calculator
Estimate your monthly cash position, identify potential cash shortages, and plan for upcoming business expenses.
Free educational calculator • No signup required • Calculator inputs stay in your browser
This is an educational planning calculator. It is not a financial statement, tax return, loan application, accounting system, valuation, audit, review, compilation, investment recommendation, or guarantee of business performance.
Cash Flow Is Not the Same as Profit
A business can show a profit but still experience cash shortages. For example, a business may invoice customers today but not collect payment for 30, 60, or 90 days, while payroll, rent, loan payments, and vendor bills must be paid sooner.
A cash-flow forecast tracks when cash is expected to enter and leave the business. Update it regularly as actual sales, collections, expenses, payroll, tax payments, and financing needs change.
How to Use This Forecast
- Enter collections when you expect customers to pay
- Enter expenses when cash is expected to leave the business
- Include payroll, taxes, debt payments, owner draws, inventory, and large planned purchases
- Review months where ending cash is low or negative
- Update the forecast at least monthly, or weekly for businesses with tight cash flow
- Use conservative assumptions for revenue and collections
Common Cash-Flow Forecast Mistakes
- Treating invoiced revenue as cash collected
- Forgetting payroll taxes, estimated taxes, debt payments, or owner draws
- Ignoring seasonal revenue changes
- Underestimating inventory, maintenance, repairs, or large one-time expenses
- Forgetting the timing of customer collections
- Assuming profit automatically means available cash
- Failing to maintain a working-capital reserve
- Using one forecast once and never updating it
Business Planning Sources
- U.S. Small Business Administration — Plan Your Business
- U.S. Small Business Administration — Manage Your Business
- U.S. Small Business Administration — Write Your Business Plan
- U.S. Small Business Administration — Funding Your Business
Business-planning resources last reviewed: August 11, 2026.
Need Help Building a Cash-Flow Plan?
HW & Associates CPA PLLC can help business owners with bookkeeping, accounts receivable and payable processes, cash-flow forecasting, tax planning, payroll, financial reporting, and CFO advisory services.
Schedule a CFO or Cash-Flow Planning ConsultationEducational use only. This calculator provides a simplified, general estimate of potential business cash inflows, cash outflows, net cash flow, ending cash balances, and working-capital needs based solely on the information entered by the user. It is not tax, legal, accounting, financial, investment, lending, valuation, audit, review, compilation, or business advice. It does not prepare financial statements, tax returns, loan applications, budgets, forecasts, cash-flow statements, or accounting records, and it does not guarantee business performance, liquidity, profitability, funding availability, or the sufficiency of working capital.
Actual cash flow may differ materially because of customer collections, payment terms, late payments, bad debts, seasonality, inventory, payroll, taxes, loan obligations, insurance, rent, vendor terms, capital expenditures, financing, economic conditions, unexpected expenses, business decisions, and other factors. Cash flow is not the same as profit. Review and update forecasts regularly and consult qualified professionals before making material business, hiring, financing, investment, tax, or operational decisions.
Use of this calculator or website does not create a CPA-client, accountant-client, attorney-client, fiduciary, investment-adviser, lender, or other professional relationship with HW & Associates CPA PLLC. A professional relationship begins only when HW & Associates CPA PLLC accepts an engagement and the parties execute an applicable engagement agreement.
Do not enter Social Security numbers, employer identification numbers, bank-account details, routing numbers, payment-card information, customer names, vendor names, employee information, invoices, payroll records, tax returns, financial statements, loan documents, or other sensitive information. Calculator inputs and results are processed locally in the visitor’s browser and are not intentionally saved or transmitted by this calculator.