Cash Flow Projection Calculator
Project your business's future monthly cash flow by applying compounding growth rates to current revenue and expenses. Ideal for financial planning, budgeting, and scenario analysis.
About this calculator
This calculator estimates future net cash flow by applying compound growth separately to revenue and expenses over a chosen projection period. The formula is: Projected Cash Flow = (monthlyRevenue × (1 + revenueGrowthRate/100)^projectionMonths) − (monthlyExpenses × (1 + expenseGrowthRate/100)^projectionMonths). The exponentiation models compounding — each month, revenue and expenses each grow by their respective percentage on top of the prior month's figure. Because revenue and expenses often grow at different rates, projecting them independently gives a more realistic picture than applying a single blanket rate. If expense growth outpaces revenue growth over a long horizon, even a currently profitable business can show negative future cash flow, making early identification of this trend critical for strategic planning.
How to use
Assume monthly revenue of $20,000 growing at 3% per month, monthly expenses of $15,000 growing at 2% per month, and a 6-month projection horizon. Projected Revenue = 20,000 × (1 + 0.03)^6 = 20,000 × 1.1941 ≈ $23,882. Projected Expenses = 15,000 × (1 + 0.02)^6 = 15,000 × 1.1262 ≈ $16,893. Projected Cash Flow = $23,882 − $16,893 ≈ $6,989 per month at the end of month 6, up from $5,000 today — a healthy improvement driven by revenue growing faster than expenses.
Frequently asked questions
What is the difference between cash flow projection and profit projection?
Cash flow projection tracks the actual timing of money moving in and out of a business, while profit projection focuses on accounting income which may include non-cash items like depreciation or accrued revenue not yet received. A business can be profitable on paper but still run out of cash if customers pay slowly or expenses are due upfront. Cash flow projection is therefore critical for operational survival, not just long-term profitability analysis. This calculator focuses on the cash flow perspective using current revenue and expense figures.
How do compounding growth rates affect long-term cash flow projections?
Compounding means that growth builds on itself each period, so even small differences in growth rates become dramatic over longer horizons. For example, revenue growing at 3% per month and expenses at 2% per month may look similar in the short term, but after 24 months the gap widens significantly due to the exponential nature of the formula. This is why it is important to stress-test your assumptions: slightly overestimating revenue growth or underestimating expense growth can make a struggling business appear healthy. Use conservative estimates for a more prudent financial plan.
When should I use a cash flow projection calculator for my business?
You should use a cash flow projection calculator whenever you are making a significant financial decision — such as hiring staff, taking on a loan, expanding operations, or evaluating whether your business can sustain its current burn rate. Startups often use it during fundraising to demonstrate financial viability to investors. Established businesses use it for annual budgeting and quarterly reviews. It is also invaluable during periods of uncertainty, such as an economic downturn, when understanding your runway under different growth scenarios can guide critical decisions.