Its accounts for 2024, signed off at the end of September, said it had about "four to six weeks" worth of cash and "committed resources" and that it needed to keep winning revenue-generating contracts, secure short-term equity deals and manage its creditor position to stay afloat until the £130 million funding round was closed.
The company told The Times it had secured £5 million this year, including funds "received since the date that the accounts were signed".
Canaccord Genuity, the investment bank, has been working on raising funds. The planned £130 million round is intended to be followed by a £180 million private funding deal or a flotation around 2027.
To reach production, the company needs to close the initial funding round, which it aims to secure at least part of by the end of the year. It said it was in advanced talks with investors for at least half of the £130 million and was also exploring a "number of alternate funding routes".
Hybrid Air Vehicles hopes its 92 metre-long craft, the Airlander 10, could be in service by 2029, at which point it aims to reach breakeven.
The Airlander 10, nicknamed the "flying bum" owing to its distinctive posterior, is intended to be a low-emissions aircraft with more than a hundred seats and has been called a "new category of transport".
It emerged from an abandoned US military surveillance project and is capable of carrying more than ten tonnes for logistics purposes, is able to stay airborne for more than five days and can land on "fields, tarmac or sea", so does not need traditional airport infrastructure.
Unlike airships, which people associate with famous disasters and which declined as aircraft came to dominate air travel, Airlander relies on a combination of aerodynamic lift and engine power for take-off and landing (like an aircraft) and buoyant lift provided by helium (like an airship).
With a top speed of about 80mph, which is comparable to trains and a little slower than commercial helicopters, the craft could be used for domestic passenger air travel.
The developers claim it will "transform what aircraft can do'' and enable low-carbon regional journeys for passengers as well as logistics and long-range ones for "eco-tourism, humanitarian and security services".
A factory in Doncaster has been lined up to produce at least 24 Airlanders a year by 2030, which would create 1,200 jobs and produce annual sales of about £1.2 billion a year.
It has $2 billion worth of reservations, including plans for six aircraft to serve Scotland's Highlands and Islands and a reservation by a French tourism company and said its "pipeline" of prospective sales was worth $7 billion.
The Airlander is the first new large aircraft to go through the Civil Aviation Authority-type certification process since 1979.
The government's regional growth fund has demanded repayment of a £1.9 million grant to the company after terms of the assistance were not fully met. Formalisation of a deal to repay the funds over four years is outstanding, according to the latest accounts. It also needs to restructure loan notes due at the end of the year.
The company said in its accounts that there would be uncertainty over its going-concern position until it was "funded to a "cashflow-positive position".