Plans requiring people to earn £38,700 a year before bringing family to the UK will be introduced in early 2025, Rishi Sunak has said.
The rise from the current £18,600 level was announced earlier this month and had been scheduled for the spring.
However, the government has rowed back and now says the increase will come in two stages.
Next spring, the threshold will rise to £29,000, with the further rise not applying until the following year.
Speaking in Lincoln, Mr Sunak defended the timetable, saying: “The principle here is absolutely right that if people are bringing dependents into this country as part of their family, they must be able to support them.
“We’re doing exactly as we said we would. We’re just doing it in two stages. So it will go up in a few months time and then it will go up again the full amount in early 2025.”
He added: “The levels of migration are far too high. They’ve got to come down.”
Official estimates indicate net migration – the difference between the number of people coming to and leaving the UK – rose to a record 745,000 in 2022.
In a bid to reduce the number, the government announced earlier this month it would be changing the rules for family visas alongside other measures including foreign workers having to earn at least £38,700 to qualify for a UK skilled worker visa.
Ministers had faced criticism that the increase from £18,600 to £38,700 for family visas was too high and would disrupt households.
The BBC also understands there were concerns that changing it all at once could leave the government more vulnerable to legal challenges.
On Thursday, the Home Office announced the threshold would rise only to £29,000 in the spring before increasing to £38,700, but gave no further timetable.
However, on Friday Mr Sunak provided more details when he said the figure would rise to the full amount in early 2025.
Labour’s shadow home secretary Yvette Cooper said the government had “failed to consult anyone on their new proposals and took no account of the impact of steep spousal visa changes on families next year, so it’s no surprise they are now rowing back in a rush”.