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Cash flow management for small businesses

Cash flow is the timing of money coming into and going out of your business. A business can be profitable on paper and still run short of cash if customers pay slowly, inventory ties up money or bills land before revenue does. Managing cash flow means forecasting those gaps, narrowing them where you can and planning how to cover the rest.

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In short

  • Profit measures income minus expenses; cash flow measures when money actually arrives and leaves.
  • A rolling 13-week forecast is a common way to see shortfalls before they happen.
  • Invoicing promptly, clear payment terms and deposits can bring cash in sooner.
  • A tax reserve and an emergency buffer help smooth uneven months.
  • Financing can bridge a timing gap, but it can also hide a business that is losing money.

Profit is not the same as cash

Your profit and loss statement can show a profit for a month in which your bank balance fell. Common reasons: customers have not paid their invoices yet, you bought inventory or equipment up front, you paid down a loan (which reduces cash but is not an expense), or a large tax payment came due. Watching both numbers, and understanding why they differ, is the core of cash flow management. Our bookkeeping basics guide explains the statements involved.

Cash flow comes up again and again as a challenge in the Federal Reserve’s Small Business Credit Survey (opens in a new tab), which asks owners about their finances and financing.

Building a 13-week cash flow forecast

A short-term forecast lists the cash you expect to receive and pay, week by week, so you can see low points in advance. A spreadsheet is enough.

  1. Start with your current cash balance across business accounts.
  2. List expected cash in for each week: customer payments by their likely date, not the invoice date, plus any other receipts.
  3. List expected cash out for each week: payroll, rent, suppliers, loan payments, card payments, taxes and subscriptions.
  4. Calculate each week’s ending balance and carry it to the next week.
  5. Mark any week that falls below the cushion you want to keep.
  6. Each week, replace the oldest week with actual figures, add a new week at the end and adjust.

Plan for seasonality

If your sales rise and fall through the year, look back at last year’s bank statements to see when cash ran low, and build those patterns into the forecast.

Bringing cash in sooner

  • Invoice as soon as work is delivered, not at month end.
  • Set clear payment terms and state them on every quote and invoice.
  • Ask for deposits or progress payments on larger jobs.
  • Make paying easy, with several payment methods.
  • Follow up on overdue invoices on a set schedule.
  • Review which customers pay late, and adjust terms for them.

Managing what goes out

  • Pay bills on their due date, not early, unless an early-payment discount is worth it.
  • Ask suppliers about payment terms that line up with when you get paid.
  • Keep inventory lean; stock on the shelf is cash you cannot use.
  • Review subscriptions and recurring charges regularly.

Tax reserves and an emergency buffer

Many owners keep two cushions in separate savings accounts: a tax reserve, funded from each deposit so estimated and year-end taxes do not drain operating cash, and an emergency buffer for slow months or surprises. How large each should be depends on your expenses, seasonality and risks; an accountant or an SBA resource partner (opens in a new tab) can help you think it through. The SBA’s manage your finances (opens in a new tab) guide covers the basics.

When financing helps, and when it hides a problem

Financing can make sense for a timing gap, such as covering payroll while waiting on a large customer payment or buying seasonal inventory that will sell. A business line of credit is one tool owners use for recurring short-term gaps, and working capital loans are another. The SBA’s loans overview (opens in a new tab) describes its programs.

Financing does not fix a business whose costs are higher than its revenue. If the forecast shows a shortfall every month, borrowing only delays the problem and adds payments.

Questions to ask yourself before borrowing:

  • Is this a timing gap, or a business losing money?
  • How and when will this be repaid, and from what cash?
  • Does the repayment schedule match how long the need lasts?
  • What is the total cost, including all fees, compared with alternatives?

Red flags

  • Using short-term, high-cost funding to pay for long-term needs.
  • Taking a new advance or loan to cover payments on an earlier one, sometimes called stacking.
  • No forecast at all, so every shortfall is a surprise.

Frequently asked questions

How much cash should a small business keep?

There is no single answer; it depends on your monthly expenses, how uneven your revenue is and your risks. Many owners keep a tax reserve and an emergency buffer in separate accounts and review them regularly.

How do I forecast cash flow?

List expected cash in and out week by week, starting from your current balance, and calculate each week’s ending balance. A rolling 13-week forecast in a spreadsheet is a common approach.

Can a line of credit help with cash flow?

A line of credit is one tool owners use to bridge short-term timing gaps, borrowing as needed and repaying as cash comes in. It does not fix a business that is losing money, and terms and costs vary by lender.

Why is my business profitable but short on cash?

Common causes include slow-paying customers, inventory or equipment bought up front, loan principal payments and large tax bills. A cash flow forecast helps show where the money is going.

Sources

  1. SBA: Manage your finances (opens in a new tab)
  2. Federal Reserve: Small Business Credit Survey (opens in a new tab)
  3. SBA: Loans (opens in a new tab)

Line of credit

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