A Monzo debit card used at a payment terminal.MonzoBritish electronic bank Monzo said Thursday its yearly losses more than doubled and cautioned its capacity to keep on functioning had become more uncertain on account of the coronavirus pandemic.The startup reported an yearly post-tax reduction of £113.8 million ($149.5 million) in its own 2020 balances , up from the £47.1 million it lost last yearamid investment on hiring, marketing and a U.S. expansion. That was despite revenues more than tripling to £67.2 million from £19.7 million.Monzo lent out a record £143.9 million, compared to £19.2 million in its 2019 results. But it expects credit losses to climb dramatically to £20.3 million from £3.9 million, with £4.1 million of that sum being set aside for a heightened default risk associated with the pandemic.In a sign of the toll the crisis has taken on some start-ups, Monzo said the disruption resulting from Covid-19 has led to “significant doubt” about its ability to continue “as a going concern.””Our revenue streams have been significantly impacted by the COVID-19 pandemic and resulting macro-economic uncertainty,” Monzo said in its report. “Regulatory reviews will also lead to stricter financial crime requirements.””This may result in lower forecasted customer numbers and revenues, along with increased costs associated with correcting areas of concern. This increases the risk that the Group will not be able to execute its business plan, which could adversely impact its ability to generate a profit or raise sufficient capital to meet future regulatory capital requirements.”Matt Clifford, founder of London-based start-up investor Entrepreneur First, said such statements aren’t typical of young tech companies with access to venture capital, or VC, funding.”Those accountant statements aren’t really built for start-ups,” he told CNBC. “Almost all growth companies aren’t really a going concern by conventional standards without access to more VC.”It’s been a tough year for Monzo, which saw its market value slashed by 40% to £1.25 billion this past month due to the harsh impact of Covid-19. German app-based bank N26 and UK. peer Revolut maintained their respective $3.5 billion and $5.5 billion valuations in recent fundraising deals, while money transfer firm TransferWise saw its value climb to $5 billion in a secondary share sale.The big challenge for Monzo now is figuring out how to make money in its own 4.4 million users. The challenger bank currently generates most of its revenue in fees generated every time a customer uses their card, however it recently relaunched a premium account called Monzo Plus in a bid to diversify its revenue streams. The firm said Thursday that it would launch another premium banking product that includes travel-related features in the next fiscal year.Monzo said last month it would have to lay off 120 employees to weather the crisis and earlier this year also shuttered a customer support office in Las Vegas. In its annual report, the bank said it was aiming to avoid further redundancies. The firm’s co-founder Tom Blomfield recently stepped down as CEO to take on a more product-focused role as president, together with US. main TS Anil carrying his place.