The organization, which speaks for 190,000 companies, conducted a survey of 236 firms, representing 101 large companies (more than 500 employees) and 135 SMEs (1-500 employees), between September 19 and October 8 on how to They are preparing for Brexit.
Nearly one in five (19 percent) of respondents said that the most recent date to stop the implementation of Brexit's contingency plans has passed.
In addition, 15 percent said that this date is October, while 24 percent said November and December, respectively.
Four out of five businesses (80 percent) revealed that it has had a negative impact on their investment decisions, more than double a year ago.
Two-thirds (66 percent) said that Brexit has had an impact on the attractiveness of the UK as a place to invest, while 24 percent said it had no impact.
Three out of 10 businesses (30 percent) have analyzed the growth opportunities that Brexit can provide, but have not yet found any.
A fifth (20 percent) has found some opportunities for business growth and of those, a third (33 percent) identified the disruption of existing markets as an opportunity in relation to Brexit.
Another 21 percent of companies said they wanted to look for opportunities but could not because they did not know what form Brexit would take.
Almost a third (28 percent) have not sought opportunities at all, but more than half of them still intend to do so.
The general director of CBI, Carolyn Fairbairn, warned that "the speed of negotiations is being overcome by the reality faced by companies in the field", while the agency said that almost a fifth of the firms say that "the point of no return to activate their plans has already happened. "
Contingency plans include cutting jobs, adjusting supply chains outside the United Kingdom, storing goods and relocating production and services abroad.
The CBI also warned that the reluctance of companies to invest will have a chain effect on jobs, wages and living standards, adding that investment is a "pillar of productivity, where the UK is already behind its international peers. "
Teresa May returned from a summit of The leaders of the European Union in Brussels last week made no significant progress in the talks on Brexit.
But she suggested that she is willing to extend the transition period beyond December 2020 to allow the United Kingdom and the EU to put an end to the problems surrounding the future post-Brexit relationship, in particular, the border problem Irish
Ms. Fairbairn said: "The situation is now urgent, the speed of negotiations is overtaken by the reality faced by companies in the field.
"Unless a Retirement Agreement is closed in December, companies will push the button on their contingency plans. Jobs will be lost and supply chains will be moved.
"The knock-on effect for the UK economy would be significant: living standards would be affected and there would be less money available for vital public services, such as schools, hospitals and housing.
"Uncertainty is depleting UK investment, and Brexit has a negative impact on 8 out of 10 companies.
"From a multinational plastics manufacturer that has canceled an investment of £ 7 million, to a fashion house that ignores the plans of £ 50 million for a new factory in the United Kingdom, these are important losses for our economy.
He added: "Many companies will not publish these decisions, but their impact will be shown in the years of lower GDP on the line.
"As long as" without agreement "remains a possibility, the effect is corrosive to the economy, jobs and communities of the United Kingdom.
"Companies have shown great resilience since the Referendum, but now patience is lost. Negotiators must secure the Retirement Agreement before December to unlock a transition period.
"The message to politicians on all sides is:" your actions will be echoed through the generations "."