Small Business
Monitor net cash flow each month and track your ending balance over time.
What this calculator does
A small-business cash flow planner forecasts incoming and outgoing cash to prevent cash shortages that can destroy otherwise profitable businesses. It projects monthly or weekly revenue from sales, accounts receivable, and other sources minus operating expenses, debt payments, and inventory purchases. Cash flow differs from profit: a business can be profitable on paper but fail if cash runs out before income arrives. This tool helps owners identify timing mismatches (e.g., paying suppliers before customers pay you), plan for seasonal fluctuations, and determine financing needs. Effective cash flow management ensures the business survives and thrives.
How it works
The calculator projects revenue in and cash out for each period (typically 12 months). Revenue includes sales, receivables collection, and loans. Expenses include payroll, rent, utilities, suppliers, and loan payments. The formula calculates beginning cash, adds inflows, subtracts outflows to determine ending cash. Negative balances trigger alerts for financing needs. Advanced versions model scenarios (seasonal peaks/troughs, delayed collections) and show cumulative cash position. This helps owners see when they need credit lines and when they have excess cash to invest.
Formula
Ending Cash = Beginning Cash + Revenue - Expenses. Cumulative monthly: if January ends with -$5,000 and February generates +$10,000, you'd have +$5,000 by February-end. Negative balances indicate borrowing needs.
Tips for using this calculator
- Be conservative with revenue projections and aggressive with expense estimates; it's better to overestimate needs than be caught short
- Model your actual cash collection timeline, not invoice date—many small businesses don't collect immediately, creating timing gaps
- Include all expenses: payroll taxes, insurance, professional services, maintenance, and irregular expenses like annual licenses or equipment replacement
- Plan for seasonal swings if your business has them; anticipate cash needs during slow periods and plan accordingly
- Update your forecast monthly with actual results and adjust forward projections; cash flow is dynamic and requires ongoing monitoring
Frequently asked questions
How is cash flow different from profit?
Profit is revenue minus expenses (calculated on accrual basis). Cash flow is actual cash in minus cash out (when money moves). A $100,000 sale on credit is profit immediately but not cash flow until collected. A business can be highly profitable but run out of cash if collections lag.
What should I do if my cash flow forecast shows a shortfall?
Options: establish a business line of credit or business credit card before you need it (easier to get when not desperate), negotiate longer payment terms with suppliers, offer early payment discounts to speed collections, or adjust spending timing. Plan ahead—don't wait until crisis mode.
Should I include debt principal payments in cash flow?
Yes. Principal payments are cash out even though they're not expenses on the income statement. Interest is also cash out. Both affect available cash even if they don't affect profit calculations.
How far ahead should I forecast cash flow?
Minimum: 12 months to capture seasonal patterns. For new businesses or those with volatile revenue: 24 months. Once established: rolling 12-month forecast updated monthly. Use different time intervals (weekly or daily) during tight cash periods.