Run the s.123 test on today's figures

Type your own 13-week cash figures; it says which limb of Insolvency Act 1986 s.123 is tripped today and what another eight weeks of trading adds to the deficiency.

Weekly cash burnGBP/week
Runway before cash reaches zeroweeks (-1 = no burn)
Date the cash runs out
Deemed-insolvency limb
Days left on the 21-day demand clockdays
Balance-sheet gap, s.123(2)GBP
Increase in net deficiency over those weeks, s.214GBP
Debt plus petition fee and depositGBP
Days until your review datedays
Verdict

Keep this run. The calculation above is free, keyless and unlimited. $60 once adds a different axis, not a bigger answer: a dated CSV of these exact inputs, outputs and verdict for the board minute, and a browser reminder that re-opens the test before the review date you typed.

Get the CSV board pack and the review reminder — $60

$60 once · one licence key per person or team seat · 7-day full refund. A licensed insolvency practitioner’s pre-appointment work is billed at time cost, and the creditors’ voluntary liquidation that follows a missed cash-flow test runs GBP 3,000 to GBP 8,000 plus VAT (UK, 2026).

Both s.123 limbs, not one
Runs the cash-flow test in s.123(1)(e) against your 13-week figures and the balance-sheet test in s.123(2) against realisable assets, and says which one is tripped.
The 21-day demand clock
A written demand for a sum exceeding GBP 750 that goes unpaid for 21 days is deemed inability to pay under s.123(1)(a); the tool counts the days you have left.
What trading on costs you personally
Multiplies the weekly cash burn by the weeks you plan to trade on to price the increase in net deficiency a liquidator measures a s.214 wrongful trading contribution by.
What the petition adds
Adds the GBP 332 court fee and the GBP 2,600 Official Receiver deposit to the overdue debt, so you see the figure a creditor is really chasing before you ignore the demand.
Dated CSV for the board minute
Paid layer: exports the exact inputs, outputs and verdict with the run date, so the file your adviser or the liquidator asks for exists on the day you decided.
Reminder before your review date
Paid layer: sets a browser alarm for the review date you typed, because the test is only worth anything if it is re-run when the forecast moves.

Get the complete version $60

This page is the working piece. The full pack has everything below.

Type your own 13-week cash figures; it says which limb of Insolvency Act 1986 s.123 is tripped today and what another eight weeks of trading adds to the deficiency.

A licensed insolvency practitioner's pre-appointment work is billed at time cost, and the creditors' voluntary liquidation that follows a missed cash-flow test runs GBP 3,000 to GBP 8,000 plus VAT (UK, 2026).

Buy the full version — $60

Questions people ask

What does this actually do?

It runs the two tests in section 123 of the Insolvency Act 1986 on figures you type. The cash-flow limb compares your 13-week receipts and payments against cash in hand; the balance-sheet limb compares realisable assets against total liabilities. It also prices what another eight weeks of trading adds to the deficiency.

Who is it for?

UK owner-directors of small limited companies, and the bookkeepers and accountants who keep their weekly cash forecasts. It is for the fortnight when a demand has landed, the bank balance still looks survivable, and somebody has to decide whether trading on is defensible. It is a calculation, not legal advice.

Why will a free chatbot not do this?

Chatbots still repeat the temporary ten thousand pound winding-up threshold from the 2020 to 2022 measures, when the standing figure under s.123(1)(a) is a sum exceeding seven hundred and fifty pounds unpaid for 21 days. They also cannot see your forecast, so they answer yes or no instead of a number.

What is free and what costs money?

Every calculation is free, keyless and unlimited: both limbs, the 21-day clock, the runway, the dry-out date, the deficiency figure, the petition claim and the verdict. Twenty-nine dollars once adds a different axis, not a bigger answer: a dated CSV you can keep, and a reminder before your review date.

What would this cost with a person?

A licensed insolvency practitioner's pre-appointment work is billed at time cost, and the creditors' voluntary liquidation that follows a missed cash-flow test runs three to eight thousand pounds plus VAT in 2026. A creditor's own petition adds a court fee of three hundred and thirty-two pounds and a deposit of two thousand six hundred.

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