A quarter of sponsors of Ukrainians as part of the Homes for Ukraine scheme do not want to continue the arrangement beyond six months, the Office for National Statistics (ONS) has found.
Launched in March, it has seen about 75,000 refugees arrive in the UK.
Sponsors agreed to provide accommodation in their own home for a minimum of six months.
But there are concerns at what will happen when those arrangements reach the end of that time.
The scheme was set up by the government to help those fleeing Russia's invasion of Ukraine, and worked alongside the Ukraine Family Scheme - which allowed refugees to join relatives already living in the UK.
An ONS survey of Homes for Ukraine hosts found 26% want to end their sponsorship after six months or less.
Six out of 10 sponsors said they were happy to accommodate their Ukrainian guests for more than the agreed minimum with almost a quarter saying they would be prepared to continue the arrangement for more than a year.
However, almost all sponsors said they had provided support and help to their guests that went beyond the official arrangement.
Eight out of 10 said they had given them food, two-thirds had helped them find work and 45% had provided financial support.
The ONS research also found that 18% of those signed up for the scheme were still waiting for guests to move in.
Of those who did not wish to accommodate Ukrainians for more than six months, just under a quarter said their decision was down to the rising cost of living.
https://www.bbc.co.uk/news/uk-62493852