Managing Cash Flow

What this lesson covers

The practical, week-to-week management of cash — not the cash flow statement as a financial report (covered in Reading Financial Statements), but the daily reality of making sure there’s enough money in the bank to pay this week’s bills. More businesses fail from running out of cash than from running out of customers. This lesson covers forecasting, timing, reserves, and crisis response.

Prerequisites

Small Business Bookkeeping. Cash flow management requires accurate, current records of what’s in the bank, what’s owed to you, and what you owe others.

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Cash is not profit

This point was made in Reading Financial Statements, but it bears repeating because it kills businesses:

• You can be profitable and out of cash: You catered a $5,000 event (profitable), but the client hasn’t paid the invoice yet, rent was due yesterday, and the food distributor’s check cleared this morning. Net income is positive. The bank balance is negative.
• You can be unprofitable and cash-rich: You received a $50,000 investor deposit (cash inflow) but haven’t started spending it yet. The business is pre-revenue and losing money on paper, but the bank account is full.

Cash flow management focuses on the bank balance — the actual money available today — not on accounting profit.

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The rolling cash flow forecast

A cash flow forecast projects your bank balance forward, week by week, based on expected inflows and outflows. It answers one question: will I run out of money, and if so, when?

Building the forecast

Create a spreadsheet with one column per week, extending 8–12 weeks forward.

Row 1: Opening cash balance (this week’s actual bank balance)

Inflows (money coming in this week):

• Daily sales (estimated from historical averages, adjusted for seasonality)
• Accounts receivable collections (invoices you expect to be paid)
• Other inflows (investor deposits, loan proceeds, tax refunds)

Outflows (money going out this week):

• Payroll (fixed schedule — you know exactly when this hits)
• Rent (fixed date, fixed amount)
• Supplier payments (based on invoice due dates)
• Loan payments (fixed schedule)
• Utilities, insurance, subscriptions (known amounts, known dates)
• Estimated variable expenses (supplies, repairs, miscellaneous)
• Tax payments (quarterly estimated taxes — known dates)

Row last: Closing cash balance = Opening + Total inflows − Total outflows

This closing balance becomes next week’s opening balance.

Worked example: 4-week forecast

	Week 1	Week 2	Week 3	Week 4
Opening cash	$8,200	$6,850	$4,100	$7,200
Inflows
Daily sales	$5,800	$5,500	$6,000	$5,800
Catering invoice (Net 30)	—	—	$2,800	—
Total inflows	$5,800	$5,500	$8,800	$5,800
Outflows
Payroll	$3,400	—	$3,400	—
Rent	—	$3,200	—	—
Food distributor	$2,100	$2,400	—	$2,300
Utilities	—	—	$650	—
Insurance	—	$450	—	—
Loan payment	$850	—	—	$850
Supplies, misc	$800	$2,200	$1,650	$800
Total outflows	$7,150	$8,250	$5,700	$3,950
Closing cash	$6,850	$4,100	$7,200	$9,050

Week 2 is tight — the balance drops to $4,100 after rent and the distributor payment land in the same week. If sales come in lower than expected or an unplanned expense hits, the business could dip below a safe level. Knowing this two weeks in advance gives time to respond — delay a discretionary purchase, accelerate an invoice collection, or shift a supplier payment by a few days.

Updating the forecast

Update every week:

1. Replace last week’s estimates with actual numbers.
2. Extend the forecast one more week into the future.
3. Revise estimates for upcoming weeks based on new information (a large catering order, an unexpected repair, a supplier price change).

The forecast is a living document. Its value comes from regular updates, not from initial accuracy.

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Timing management

Cash flow management is largely about timing — ensuring that inflows arrive before outflows demand them.

Accelerating inflows

• Collect at point of sale: For walk-in customers, cash and card payment at the time of service eliminates accounts receivable entirely. This is why restaurants have better cash flow than consulting firms.
• Invoice immediately: For catering, events, and wholesale — send the invoice the day of service. Every day of delay pushes collection back by a day.
• Shorten payment terms: Net 15 instead of Net 30 if the market allows it. Or offer a small discount for early payment: “2% discount if paid within 10 days” (known as 2/10 Net 30).
• Require deposits: For large orders or events, require 50% up front. This shifts cash receipt earlier and reduces collection risk.
• Follow up on overdue invoices: Don’t wait. At 7 days past due, send a reminder. At 14, call. Polite persistence works.

Slowing outflows (ethically)

• Use full payment terms: If a supplier offers Net 30, pay on day 28, not day 5. You’re not being slow — you’re using the credit period as intended. (Exception: if an early payment discount is offered and the math works, take it.)
• Negotiate longer terms: Ask suppliers for Net 30 instead of Net 15, especially once you have a track record of on-time payment.
• Align large payments with revenue peaks: If rent is due on the 1st and your busiest week is the last week of the month, the timing works naturally. If your biggest supplier payment falls in your slowest week, ask to shift the delivery schedule.
• Stagger purchases: Don’t order everything from every supplier in the same week. Spread purchases so outflows are distributed across the month.

What not to do

• Don’t skip payroll: Employees depend on it. Delayed payroll destroys trust and may violate wage laws.
• Don’t skip tax payments: The IRS charges penalties and interest. State and local tax authorities can revoke business licenses for non-payment.
• Don’t skip loan payments without communicating: If you can’t make a payment, call the lender before the due date. Most will work with you on a temporary plan. Silence triggers collections.

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Cash reserves

A cash reserve is money set aside for the unexpected — the walk-in compressor that fails, the slow month that’s slower than projected, the catering client who doesn’t pay.

How much to keep

A common target: 2–3 months of fixed operating expenses in a separate savings account.

If monthly fixed costs (rent, insurance, loan payments, base payroll, utilities) total $14,000,thereservetargetis$28,000–$42,000. This takes time to build — start by setting aside a fixed percentage of weekly revenue (5–10%) until the target is reached.

Rules for the reserve

• The reserve is not working capital. Don’t use it for normal expenses.
• Define what constitutes an emergency: equipment failure, revenue shortfall exceeding 20%, unexpected major expense.
• When you use it, replenish it as soon as the business stabilizes.
• Keep it in a separate account so it’s not accidentally spent.

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Handling a cash flow crisis

Despite planning, cash crises happen — a bad month, a lost client, an unexpected expense, a late-paying customer.

Triage (in order)

1. Assess the gap: How much are you short? For how long? Is this a one-week timing issue or a multi-month trend?

2. Accelerate inflows:

   • Call outstanding AR customers and request immediate payment
   • Run a promotion to drive short-term sales (gift cards are especially useful — they generate cash now for services delivered later)
   • Offer a small discount for advance payment on upcoming orders

3. Defer non-critical outflows:

   • Call suppliers and request a one-week extension on payment
   • Defer discretionary purchases (new equipment, non-urgent repairs, marketing experiments)
   • Do NOT defer payroll, taxes, rent, or insurance

4. Access credit:

   • Draw on a line of credit (if you have one — this is why establishing one before you need it matters)
   • Use a business credit card for short-term bridge (expensive — pay it off quickly)
   • Owner contribution (if the owner has personal funds available)

5. Reduce costs:

   • Cut discretionary spending
   • Reduce hours for non-essential staff (painful but sometimes necessary)
   • Renegotiate supplier terms or switch to cheaper alternatives

6. Communicate:

   • Tell your landlord if rent will be late. Most prefer a conversation to a surprise.
   • Tell your lender. They may offer a forbearance or modified payment plan.
   • Don’t hide from the problem — creditors are more cooperative before a missed payment than after.

When the crisis is structural

If the cash flow problem isn’t a timing issue but a structural one — the business consistently spends more than it earns — timing tricks won’t fix it. The business needs to either increase revenue (more customers, higher prices, new revenue streams) or reduce costs (renegotiate rent, reduce staff, simplify operations). This is the signal to revisit the financial projections and the break-even analysis with honest numbers.

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Guidance

• Build an 8-week cash flow forecast for a business you operate or are planning. Use actual numbers where available and realistic estimates where not. Identify the tightest week — what would push it into negative territory?
• Review your accounts receivable aging. How much is outstanding over 30 days? What would collecting it this week do to your cash position?
• Calculate your reserve target (2–3 months of fixed costs). How far are you from it? Set a weekly savings amount to reach the target within 12 months.