Q4 is when a lot of businesses book their biggest sales of the year. It’s also when a lot of owners run short on cash, often in the same weeks. Most of it traces back to a few assumptions that feel fine in October and hurt by January.

Counting Q4 Sales as Q4 Cash

A big November invoice makes the books look great. If your clients pay on net-30 or net-60, that money lands in December or February, while payroll, rent, and inventory orders are due now.

Map each receivable to the week you expect to be paid, not the week you sent the invoice. The gap between those two dates is where most Q4 cash crunches start.

Spending Ahead of the Holiday Bump

Seasonal hires, extra inventory, and bigger ad budgets all get paid for before the revenue shows up. That’s normal. The trouble starts when owners commit to all of it at once without checking whether the cash will last until sales catch up.

Spend in rounds. Commit to the first, look at results in two or three weeks, then decide on the second. A slow start is easier to absorb when the whole budget isn’t already gone.

Treating the Bank Balance as Spendable

Your balance includes money that’s already spoken for: sales tax you collected, payroll taxes, vendor bills due next week, and the estimated tax payment due in January.

Before a big purchase, subtract what’s committed over the next 30 to 60 days. What’s left is your real cushion, and it’s usually smaller than the balance suggests.

Forgetting What Lands in January

Q4 gets planned as if it ends on December 31, but several bills show up right after:

  • The Q4 estimated tax payment
  • Year end bonuses and final payroll taxes
  • Annual insurance and software renewals
  • 1099 prep and quarterly payroll filings

If your cash plan stops at December, January starts with a hole in it.

Assuming Clients Will Pay on Time

Your clients are closing their own books too. Approvals slow down, finance teams take time off, and a 30 day invoice turns into 45 or 60.

Send invoices earlier, follow up at day 15 instead of day 30, and build a few weeks of delay into your forecast. If clients pay faster than that, you’re ahead.

Plan the Quarter Week by Week

A 13 week cash forecast handles most of this. List what you expect to receive each week based on when clients really pay, then what goes out each week, January bills included. Update it every Friday. You’ll see a tight week a month before you’re in it, which leaves time to pull an invoice forward, push a purchase, or open a credit line while your numbers still look good.

If you’ve never built one, start with your next 90 days of known bills and work outward. And if you’d rather not do it alone, Decimal can sit down with your numbers and map out the next 13 weeks with you.