
Cash flow is an essential financial metric since it reflects how cash, the lifeblood of any business, moves in and out of a company. Tracking and calculating cash flow helps a business understand how well it's meeting its financial obligations, if it is likely to be able to pay upcoming bills, and if growth plans are on track. It is also an important tool for benchmarking how a business is doing against other similar companies.
Regularly calculating cash flow also provides critical advance notice of impending cash flow tight spots in time to address them. This is important, since most businesses, even profitable ones, experience cash flow issues at some point. Cash flow problems can stall momentum, damage credit, tarnish business reputation and imperil company viability.
Knowing how to calculate cash flow helps businesses make smarter decisions, support growth, and avoid running out of funds when it matters most.
The question "How to calculate cash flow?" has two answers. Businesses can use either a cash flow statement, which shows what has already happened in the past, or a cash flow projection (also referred to as a cash flow forecast) to estimate what is ahead. Both of these documents are an important part of cash flow management and show how cash is moving in and out of a business.
| Cash flow statement | Cash flow projection | |
| What it shows | How cash (from operations, investments, and financing) moves through a business during a specific past period (e.g., last month, quarter, or year). | Expected future cash that will come in and go out for a specific future period (e.g., next month, quarter, or year). Also called a cash flow forecast. |
| Based on | Real transactions: sales, expenses, loans, asset purchases. | Estimates and forecasts: expected sales, spending, financing. |
| Basic formula | Total Cash In − Total Cash Out | Expected Cash In − Expected Cash Out |
| What it measures | A company's ability to generate cash, meet financial obligations, and grow. | Upcoming ability to meet financial commitments and grow. Identifies upcoming cash gaps. |
Some businesses routinely create both documents, while others use projections more frequently for cash flow management and only create cash flow statements as needed.
A related cash flow calculation is "free cash flow," a metric that paints a clear picture of the actual cash your business has on hand after covering expenses and necessary investments
Whether a business is preparing a cash flow statement (historical) or a cash flow projection (forecasted), understanding some simple definitions and a formula may help.
Key definitions involved in calculating cash flow:
The basic formula to calculate net/total cash flow (whether historical or projected) is:
Operating Cash Flow + Investing Cash Flow + Financing Cash Flow = Total (Net) Cash Flow
For a cash flow statement, a business uses actual numbers; for a projection, it uses estimates.
Pick the previous 3, 6, or 12 months for a cash flow statement or an upcoming timeframe for a projection.
Add up all cash from sales and subtract operating expenses like rent, payroll and supplies.
Add cash received from selling assets and subtract cash spent on equipment or property.
Add loan or investor funds received and subtract repayments, loan principal or owner withdrawals.
Add operating, investing, and financing cash flows together.
One essential tip for calculating cash flow is to do it consistently. Even thriving companies can experience cash flow crunches that may negatively impact vendor relationships, business reputation, business credit and financial viability. Knowing how to calculate cash flow may help you take steps to avoid a cash flow crisis.
Some common mistakes may limit the value of cash flow calculations.
Take a look at some frequent errors businesses make, plus tips to help avoid them, so these calculations can support business growth.
| Mistake | How to avoid it |
| Confusing profit with cash flow | Profit is an accounting metric indicating cash that will arrive at some point; cash flow shows actual money in and out. You can be profitable and still run out of cash. |
| Ignoring timing of payments | Slow paying customers can create cash flow challenges. Use tools to speed up customer payments such as online invoicing, and accept credit, debit, ACH payments, Zelle and other payment tools. |
| Paying bills too quickly | Not all bills need to be paid immediately. Online bill payment tools may help you time payments to hold on to business cash as long as possible and avoid late fees. |
| Delaying collections and deposits | Any time lapse in collecting payments from customers can impact cash flow. Mobile deposit, digital invoicing and other cash management tools can help. |
| Overly optimistic assumptions | Build conservative projections with buffers for delays and shortfalls. |
| Ignoring seasonality | Analyze past patterns and adjust projections for busy and slow periods. |
| Not consistently tracking and calculating cash flow | Use a cash management system to ease the process of tracking and calculating cash flow. In addition to online payments and collections, this may include automating bookkeeping entries, tracking and categorizing payments, and receiving alerts when money arrives or leaves your account or bills are due. |
| Not having financing in place for cash crunches | Most businesses will encounter a cash crunch at some point. Plan ahead for financing by pursuing a line of credit (LOC), business loan or other form of financing before a cash crunch hits. |
Calculating cash flow helps a business meet its financial obligations and assess its growth prospects. Backward-looking cash flow calculations via a cash flow statement reveal how cash is moving through a business and where improvements can be made. A future view from a cash flow projection can help avoid cash flow crunches which slow momentum and imperil business growth. Cash management tools can ease the process of tracking, calculating and managing cash flow so a business can make informed decisions.
Ready to take your business to the next level? Citizens is here to help with cash management solutions to help facilitate cash flow and keep your day-to-day business operations running smoothly.
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Disclaimer: The information contained herein is for informational purposes only as a service to the public and is not legal advice or a substitute for legal counsel. You should do your own research and/or contact your own legal or tax advisor for assistance with questions you may have on the information contained herein.