Why a profitable e-commerce business can run out of cash

Sales can be recorded before collection, stock can be paid for before sale, and debt principal or equipment can consume cash outside operating profit. A profitable business can therefore finish the month with less money in the bank.

Explain the difference using one period: start with the reported result, adjust noncash costs and operating balance changes, then add investing, financing and owner cash movements. The resulting cash change should reconcile to the opening and closing bank balances.

This bridge identifies what happened. A dated forecast answers what happens next, including whether the next payroll or supplier balance can be paid.

Use the same entity, currency, opening cutoff and closing cutoff for the income statement, balance sheet and bank records. Define the included accounts and reconcile their balances. Remove transfers within that cash boundary from the net change.

Identify the starting result precisely: operating profit, profit before tax or net profit. That determines which interest, tax and other adjustments are needed later. Collect the opening and closing operating balances and their transaction detail.

Starting from an accrual result, add back included noncash expenses such as depreciation. Adjust the cash effects of changes in receivables, inventory, prepayments, operating payables and accruals. Remove noncash movements and reclassifications before applying the balance-change signs.

Then account for cash interest and tax on the selected starting basis, followed by investing and financing movements. Keep a reference for every adjustment so that another person can trace it to a balance or transaction.

Cross-check operating cash with actual receipts less operating payments. A difference between the direct and indirect calculations points to a missing item, classification issue or cutoff difference to investigate.

An increase in receivables means more recorded sales remain uncollected. An increase in stock means more cost remains in inventory. A prepayment puts cash into a cost benefiting a later period. These increases reduce operating cash relative to the accrual result when they represent the relevant operating movements.

An increase in supplier payables or operating accruals means recognized activity has not yet been fully paid. It increases cash relative to the result for this period and creates a future commitment to schedule.

Inspect the balances before treating each change as timing. Aged receivables, slow stock or overdue payables need different operating responses from an ordinary collection or payment cycle.

For 1–30 September, the example starts with $25,200 operating result. Add $2,500 depreciation already included in overhead. Subtract $18,000 receivables growth, $42,000 inventory growth and $3,000 prepayments growth. Add $15,000 inventory supplier-payables growth and $5,000 operating-accruals growth. Operating cash is −$15,300.

The direct calculation agrees: $235,400 customer receipts − $115,610 inventory supplier payments − $135,090 other operating payments = −$15,300. Supplier cash also reconciles as $88,610 COGS + $42,000 inventory increase − $15,000 payable increase = $115,610. Deducting those purchases again from the indirect bridge would count the same effect twice.

After the investing and financing movements below, cash changes by −$13,300. Opening cash of $100,000 becomes $86,700. Positive operating profit and negative cash change coexist because the intervening movements are identified and reconciled.

The example has an $8,000 equipment purchase, $20,000 new borrowing, $6,000 debt-principal repayment and $4,000 owner distribution. Investing cash is −$8,000; financing cash is +$10,000. Together with −$15,300 operating cash, they produce the −$13,300 bank change.

Keep debt principal separate from interest expense, an owner distribution separate from operating costs, and new borrowing separate from sales. Use the loan, asset and owner records to confirm the amounts and classifications.

If the starting result or cash boundary differs, rebuild the adjustments on that basis. Do not force an unexplained difference into a balancing row.

If receivables drive the change, inspect the collection schedule and overdue items. If stock drives it, compare quantities, sales, age and outstanding orders. If payables support cash, schedule their due dates and check whether the position reflects agreed terms or overdue obligations.

If operating cash remains weak after timing is understood, review contribution, overhead and recurring spending. Use product profitability to diagnose earnings and the cash forecast to diagnose payment capacity.

Choose the action supported by the largest verified driver. A collection follow-up, order change or financing decision should have a dated amount and an owner.

The bookkeeper confirms the ledger and bank cutoffs. Operations explains stock and supplier commitments. The preparer builds and reconciles the bridge, while the owner confirms funding, distributions and the resulting decisions.

Keep an exception record for each unresolved difference: amount, source, suspected cause, missing evidence, responsible person and next check. Missing evidence is a request to investigate; it does not establish an accounting error.

Start with the latest reconciled month. Identify its largest profit-to-cash movement and trace it to records. Resolve or document the exception, then carry the remaining collections and obligations into a dated forecast.

Bring the income statement, opening and closing balances, bank reconciliation and main cash driver to the discussion. That gives the profit-versus-cash question a concrete starting point and an actionable follow-up.