What it means
There are two standard tests and a business only needs to fail one. The cash flow test asks whether the company can pay its debts as they fall due; the balance sheet test asks whether total liabilities, including future and contingent ones, exceed total assets.
The cash flow test is the one that bites first in practice. Plenty of businesses with strong balance sheets have run out of cash because a large customer paid late or a funding line was withdrawn, and being asset-rich is no defence when a supplier issues a winding-up demand.
The moment of insolvency changes the legal landscape for directors. Once a company is insolvent or likely to become so, directors must act in the interests of creditors as a whole, and continuing to trade while running up debts they cannot expect to repay can expose them to personal liability.
Insolvency is not the same as failure or liquidation. Many insolvent businesses are rescued through refinancing, an injection of equity, a formal restructuring procedure or a sale of the trading operation, and the earlier the problem is faced the wider the range of options remains.
Warning signs tend to arrive well before the crisis. Stretching supplier payments, relying on the overdraft limit every month, falling behind with tax, funding wages from a customer deposit and losing credit insurance cover are all recognised markers that finance teams are trained to watch.
Directors who suspect insolvency have one clearly correct first move: take advice from a licensed insolvency practitioner immediately and document the reasoning behind every subsequent decision. Delay narrows the options and increases personal exposure, while early advice frequently preserves the business.
In practice
Real-world examples.
Example
A construction subcontractor with $1,800,000 of work in progress and healthy net assets loses its main client to administration. Receivables of $640,000 become worthless overnight and the firm cannot meet its next payroll, making it cash flow insolvent despite a balance sheet that looked comfortable a week earlier.
Example
A restaurant group carries $3,100,000 of lease obligations against $1,700,000 of assets after writing down fit-out costs at three closed sites. It is balance sheet insolvent, but a landlord agreement to reduce future rents and a $900,000 equity injection from a new investor restore solvency without any formal procedure.
Example
A wholesale importer keeps paying suppliers on time but funds it by deferring $410,000 of tax across seven months. The tax authority issues a demand, the business cannot pay, and directors who had told themselves they were merely managing cash discover they had been trading while insolvent for most of a year.
Formula
Calculation
There are two tests, each with a simple calculation.
Balance sheet test: net assets = total assets - total liabilities. A negative result indicates balance sheet insolvency.
Cash flow test: available cash + expected receipts within the period - obligations falling due within the period. A negative result indicates cash flow insolvency.
Take a specialist retailer reviewing its position at the end of a difficult quarter.
Balance sheet test:
Total assets: $2,400,000
Total liabilities: $2,900,000
Net assets = $2,400,000 - $2,900,000 = -$500,000
The company is balance sheet insolvent by $500,000.
Cash flow test over the next 30 days:
Cash at bank: $80,000
Receipts expected from customers: $220,000
Total available: $80,000 + $220,000 = $300,000
Obligations falling due: supplier payments $250,000, wages $150,000, tax $60,000, total $460,000
Shortfall = $300,000 - $460,000 = -$160,000
The company is also cash flow insolvent, with a $160,000 gap inside a month. Failing either test alone would be enough; failing both means the directors must take formal advice immediately rather than trading on in hope.Case study
Seen in the real world.
The following is an illustrative and entirely fictional case. Pemberton Signage Ltd, an invented commercial signage manufacturer, had traded profitably for eleven years before losing a contract that represented 38% of its revenue. Management responded by cutting prices to win replacement volume, which held revenue at $4,600,000 but pushed gross margin from 34% to 21%, taking gross profit from $1,564,000 down to $966,000 against fixed overheads of $1,180,000.
The resulting operating loss of $214,000 was funded by stretching suppliers from 45 days to 90 and deferring two tax payments. By month eight, total liabilities of $2,150,000 exceeded assets of $1,880,000, so net assets stood at -$270,000, and a 30-day cash forecast showed available funds of $185,000 against obligations of $395,000, a $210,000 shortfall.
The finance director insisted on advice from a licensed insolvency practitioner. Because the business still had a viable core, a restructuring was arranged: two loss-making product lines closed, a creditors' arrangement rescheduled $1,400,000 of debt over three years, and the founder injected $250,000 of new equity. Pemberton survived, and this illustrative outcome turned on timing, because the same advice taken six months later would almost certainly have led to liquidation instead.
Watch out
Common mistakes.
- Equating insolvency with bankruptcy or liquidation. Insolvency is a financial condition, and several of the procedures available are designed to rescue the business rather than close it.
- Believing that being profitable rules out insolvency. Profit is an accounting measure on an accruals basis, and a profitable business that cannot pay its bills on the day they fall due is insolvent on the cash flow test.
- Trading on in the hope that a big order will fix everything. Once directors know or should know the company is insolvent, continuing to incur credit they cannot expect to repay can create personal liability for the increase in creditor losses.
Questions
People also ask.
What is the difference between the cash flow and balance sheet tests?
The cash flow test looks at whether debts can be paid when due, while the balance sheet test compares total liabilities including contingent ones against total assets, and failing either is enough.
Do directors become personally liable automatically?
No, limited liability normally holds, but wrongful trading, misfeasance, unlawful dividends and personal guarantees are all routes through which directors can end up personally exposed.
What is the single most useful thing to do first?
Prepare an honest 13-week cash flow forecast and take advice from a licensed insolvency practitioner, because both actions widen the options available and evidence that the board acted responsibly.
From the founder's library

Take it further with the book.
Build your financial confidence beyond this definition. Shihan's full-length guide, Accounting Fundamentals, takes the same plain-English approach and turns it into a complete, practical playbook for non-finance managers, business owners and students - with chapter-end quiz answers and presentation slides included.
25% off with code MMHQ25, applied at checkout. Priced in USD - checkout may show the equivalent in your local currency.
View the book and save 25%Related
