The NHS in England does not have enough beds or faculty, health boss say, ahead of the new financial year next week.
NHS Providers, which represents chief executive, cautioned the service was facing an impossible task in 2018 -1 9.
The group said it meant hospital waiting lists would grow and long A& E waits continue.
But the government said it was taking steps to support the NHS, including pay rises for staff and the promise of a long-term fund settlement.
The pay rise – if agreed by the workforce by the summer – will be backdated to April and guarantees personnel, omitting doctors, a minimum pay rise of 6.5% over three years.
Meanwhile, on Wednesday Prime Minister Theresa May perpetrated the government to a long-term funding plan in the near future to end what she called annual “cash top-ups”.