💸 Cash Flow Calculator
Project monthly and annual cash flow for your business or personal finances — track operating inflows, outflows, and net cash flow over time with a growth rate.
Enter your values
- Annual cash flow€30,000.00
- Cash flow margin31.25%
- Total projected cash flow€200,460.60
What this means
- Current monthly cash flow: €2,500.00 (€30,000.00 per year) — positive.
- Cash flow margin of 31.25% — strong. More than 20% of revenue is retained as cash.
- Total projected cash flow over the period: €200,460.60
Visual results
Detailed breakdown
| Year | Inflows | Outflows | Net cash flow |
|---|---|---|---|
| 1 | €96,000.00 | €66,000.00 | €30,000.00 |
| 2 | €100,800.00 | €66,000.00 | €34,800.00 |
| 3 | €105,840.00 | €66,000.00 | €39,840.00 |
| 4 | €111,132.00 | €66,000.00 | €45,132.00 |
| 5 | €116,688.60 | €66,000.00 | €50,688.60 |
About this calculator
What this calculator does
This cash flow calculator projects your monthly and annual net cash flow — the difference between total money coming in (inflows) and total money going out (outflows) — over a multi-year horizon. You set your current monthly inflows and outflows, an annual growth rate for inflows, and a projection period of up to 30 years. The calculator shows how your cash position evolves year by year and computes the total cumulative cash flow across the entire period.
Outflows remain flat (a conservative assumption), while inflows grow at the rate you specify. This models the natural operating leverage that improves cash flow over time as revenue scales.
The formula
Monthly cash flow:
Monthly Cash Flow = Monthly Inflows − Monthly Outflows
Cash flow margin:
Cash Flow Margin (%) = Monthly Cash Flow / Monthly Inflows × 100
Year-by-year inflow with growth:
Annual Inflow (year N) = Monthly Inflows × 12 × (1 + g)^(N − 1)
where g is the annual growth rate as a decimal. Outflows stay constant each year: Annual Outflow = Monthly Outflows × 12.
Total projected cash flow:
Total Cash Flow = Σ (Annual Inflow(N) − Annual Outflow) for N = 1 to years
How to interpret your results
- Monthly cash flow is your headline number — positive means you generate cash, negative means you burn it each month.
- Cash flow margin expresses net cash flow as a percentage of inflows: above 20% is strong, 10–20% is healthy, below 10% is tight, and negative is a deficit that needs immediate action.
- Annual cash flow scales the monthly figure to a full year — useful for comparing against annual targets or debt obligations.
- Total projected cash flow shows the cumulative cash generated over your chosen horizon, accounting for inflow growth. Use it to size reserves, plan capital expenditure, or assess how long before breakeven is reached.
The year-by-year chart makes the growth of inflows versus flat outflows visually clear, illustrating the power of improving your revenue while controlling costs.
Common use cases
- Business planning — validate whether projected revenue covers operating costs and generates a sustainable surplus
- Freelance / self-employment — map seasonal inflows against fixed monthly obligations to spot cash-tight months in advance
- Property investment — model rental income (inflows) against mortgage, maintenance, and management costs (outflows)
- Personal finance — track household income versus total expenses to see your real surplus and plan savings accordingly
- Scenario analysis — use the comparison tool to test how a 10% increase in inflows, or a cut in a specific expense, changes your 5-year cash position
Frequently asked questions
What is the difference between cash flow and profit?
Profit is an accounting figure — it can include non-cash items like depreciation and accrued revenue. Cash flow is the actual money moving in and out of your accounts. A business can be profitable on paper but still run out of cash if customers pay late or if large capital expenditures are required. Positive cash flow is what keeps a business operationally solvent.
What is a healthy cash flow margin?
A cash flow margin above 20% is considered strong and gives comfortable headroom to cover unexpected expenses, invest in growth, or service debt. A margin between 10% and 20% is healthy for most businesses. Below 10% is tight — one bad month can push you into a deficit. Negative margin means your operating expenses exceed your revenue and the situation needs immediate attention.
How can I improve negative cash flow?
There are two levers: increase inflows or reduce outflows. On the inflow side — raise prices, pursue new clients, accelerate invoice collection, or add recurring revenue streams. On the outflow side — renegotiate supplier contracts, cut discretionary spending, defer non-essential capital expenditure, and review subscriptions. Even a 5–10% reduction in outflows can turn a deficit into a surplus. Use the comparison tool to model the impact of each change.