Small firms need more help to SLOTXO bridge an 18-day gap as Covid restrictions continue but financial support packages wind down, an industry body has said.
The UK was due to unlock pandemic restrictions on 21 June, but this was postponed due to a rise in infections.
The Federation for Small Business says the new unlocking date, expected to be confirmed as 19 July, is not reflected in how firms are being helped.
A government spokeswoman said "substantial" support would remain.
The FSB is concerned that there will be a gap in financial provisioning that will put more pressure on businesses that are already struggling.
Many firms, especially in the night-time hospitality sector, had budgeted to be able to trade from 21 June.
However, the delay in easing coronavirus restrictions until at least 19 July in England, - as well as several different issues coming up to be dealt with at the same time - is causing many firms stress.
While the government has committed to continuing the furlough scheme, there will be changes from the start of July that will require increased payments from businesses.
For instance, on Thursday 1 July, business rate exemptions for retailers and hospitality firms will end.
At the same time, the amount of wage costs employers need to contribute for furloughed staff through national insurance and pension will rise from 5% to 14%.
Also on 1 July, firms will have to start paying deferred VAT bills, while repayments on more than £45bn in emergency bounce-back loans will soon be due.