Cash Flow Calculator
Project your total cash inflow, outflow, net cash flow and ending cash balance — split into operating, investing and financing — so you can see cash coming before it becomes a problem.
Written by the CalcBundle Research & Editorial Team · Reviewed by the Quality Review Team · Transparent formulas · results are estimates, not advice. · Updated
Ending cash balance
Enter your cash inflows and outflows to project cash flow.
What is a cash flow calculator?
A cash flow calculator projects the actual movement of money through your business over a period. Unlike profit, cash flow shows whether you will have enough money in the bank to pay your bills — the single most common reason otherwise-healthy businesses fail.
How is it calculated?
- Total inflow = Sales + Receivables collected + Other income
- Total outflow = Inventory + Payroll + Rent + Marketing + Taxes + Loan payments + Equipment + Other
- Net cash flow = Total inflow − Total outflow
- Ending cash = Starting cash + Net cash flow
Operating, investing and financing
The calculator also splits your cash flow into three standard activities: operating (trading), investing (equipment and assets) and financing (loans and repayments). This mirrors a formal cash flow statement and shows where your cash is really going.
Profit is not cash
You can be profitable on paper and still short of cash — for example if customers pay slowly or you buy a lot of inventory or equipment. That is why cash flow deserves its own view alongside the business profit calculator.
Example
Starting with $10,000, if $55,000 of cash comes in and $45,000 goes out, net cash flow is $10,000 and you end the period with $20,000. If outflows had been $60,000, you would end at −$5,000 — a shortfall the calculator flags so you can act early.
Why cash flow is the number that keeps businesses alive
It is often said that revenue is vanity, profit is sanity, but cash is reality — and the history of failed businesses bears it out. A large share of companies that close were profitable on paper right up to the end; what killed them was running out of cash to meet an obligation on the day it fell due. Cash flow is the one metric that captures this danger directly, because it tracks money actually moving rather than accounting entries. Projecting it forward turns cash from something you discover at the bank into something you can see coming, which is the difference between calmly arranging a short-term facility weeks ahead and scrambling to make payroll at the last minute. For that reason, a forward cash flow view belongs beside the profit statement in every owner's regular review, not as an afterthought but as the number that determines survival.
Related calculators
Plan the sales you need with the break-even calculator, size loan repayments with the business loan calculator, and track profitability with the business profit calculator.
Frequently asked questions
How do you calculate cash flow?
Net cash flow = Total cash inflow − Total cash outflow. Your ending cash balance is Starting cash + Net cash flow. Inflows include sales, collections and other income; outflows include payroll, rent, inventory, taxes, loan payments and equipment.
What is the difference between profit and cash flow?
Profit is an accounting measure that can include sales not yet collected and exclude big cash outlays like equipment. Cash flow tracks money actually moving in and out. A profitable business can still run out of cash.
What are operating, investing and financing cash flows?
Operating cash flow comes from day-to-day trading. Investing cash flow covers buying or selling assets such as equipment. Financing cash flow covers loans and repayments. Together they reconcile to your net cash flow.
What if my ending cash is negative?
A negative projected balance means you'd run short of cash in the period. Review collections, cut or delay expenses, or arrange financing before it happens — the calculator flags this for you.
Why can a profitable business run out of cash?
Because profit and cash move on different clocks. You can record a sale as profit the moment you invoice it, but the cash may not arrive for 30, 60 or 90 days — meanwhile payroll, rent and suppliers still need paying now. Buying inventory or equipment drains cash immediately while only appearing on the profit statement gradually. Rapid growth makes this worse, not better, because you fund the expansion before the revenue catches up. This timing gap is why cash flow, not profit, is the metric that actually keeps the doors open.
How can I improve my business's cash flow?
The main levers are speeding up money in and slowing down money out. On the inflow side: invoice promptly, tighten payment terms, offer small discounts for early payment, and chase overdue accounts. On the outflow side: negotiate longer supplier terms, manage inventory so cash is not tied up in stock, and time large purchases for when cash is strong. Building a cash reserve as a buffer means a slow month or a late-paying customer does not become a crisis.
How far ahead should I project cash flow?
A rolling 13-week (roughly quarterly) projection is a common standard for short-term management, because it is far enough to see problems coming yet near enough to be reasonably accurate. Longer 6- to 12-month projections help with bigger decisions like hiring or borrowing, though they grow less reliable the further out they go. The value is less in predicting the exact number and more in spotting the weeks where cash dips low enough to need action.
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Disclaimer. This calculator provides estimates for informational purposes only. Results are based on the information you enter and the assumptions used by the calculator. Actual financial, tax, business valuation, lending, marketplace or investment outcomes may differ. Consider consulting a qualified professional for decisions involving significant amounts of money. Cash flow projections are estimates based on the information entered.