Useful Tools Online

Cash Flow Forecast Calculator

Project monthly operating cash inflows, outflows, and compounding cash runway balances over 12 to 36 months.
GAAP Statement of Cash Flows StandardsRuns on your device

Inputs

Results update live
Cite this calculator

Results use the inputs you enter and standard formulas documented on this page. Not professional advice.

Last reviewed: August 2026

Cash Flow Forecast Calculator. (August 2026). Useful Tools Online. https://usefultoolsonline.com/cash-flow-forecast-calculator/

Interpretation

Forecast assumptions

Growth rates compound monthly on the base inflow/outflow. Use conservative outflow growth when planning reserves.

Watch out

Common mistakes

  • Treating one good month as the new baseline.
  • Ignoring seasonality in revenue.

Related tools

Adjacent decisions

Cash Runway CalculatorTranslate burn into months of runwayBurn Rate CalculatorMeasure underlying monthly burnBreak-Even CalculatorFind volume needed to cover fixed costsFreelance Rate CalculatorSet rates that cover forecasted shortfalls

FAQ

Frequently asked questions

How the calculation works and where its limits are.

What is a cash flow forecast and why is it vital for business survival?

A cash flow forecast models future cash receipts (inflows) versus cash disbursements (outflows) over time to predict the ending bank balance each month. It helps business owners anticipate cash deficits before they occur, avoiding insolvency even when accrual P&L is profitable.

What is the difference between cash flow and net profit?

Net profit includes non-cash items (depreciation, amortization) and uncollected revenue (accounts receivable). Cash flow measures actual liquid dollars entering and leaving your bank accounts.

How do monthly growth rates compound in cash flow forecasting?

Monthly growth rates compound exponentially each period: Inflow(t) = Inflow(0) × (1 + Growth Rate)^t. Even small percentage increases in outflow costs compound rapidly over 12 to 36 months.

Is this cash flow forecast accounting or audit advice?

No. All outputs are deterministic mathematical projections based on your entered parameters. Consult a CPA or financial controller to prepare certified GAAP cash flow statements.

What should I do if my forecasted cash balance approaches zero?

Use our Cash Runway Calculator to pinpoint your exact zero-cash date, and evaluate burn reduction strategies using our Burn Rate Calculator.