Migrants will have to have lived in the UK for at least 15 years before they are eligible for a British passport.
Badenoch announced the Tories’ proposed immigration policy changes in a video on her X account on Thursday.
Currently, an immigrant seeking British citizenship must obtain Indefinite Leave (ILR), which gives the person the right to live and work in the country.
Before applying for ILR, a person must have worked in the UK for only five years. The time frame can be shorter for different types of visas.
A person can apply for British citizenship one year after receiving ILR.
However, Badenoch proposed extending the time period before migrants can apply for ILR from five to 10 years.
She added that the waiting period between obtaining UK citizenship after receiving ILR should be increased from 12 months to five years.
The Conservative Party leader said that migrants who claim social benefits or have criminal records will never be banned from applying for UK citizenship.
“Britain is our home, it is not a hotel. It is time to tell the truth about immigration and propose real plans,” she said.
“I want to reduce immigration and make it really meaningful to live here. I will announce that the Conservative Party is going to do the following things differently.
“If you want to apply for indefinite leave to remain in our country permanently, the time you have to live here before you can apply will increase from five to 10 years.
“You will need to be a sufficiently high net worth contributor, particularly if you want to bring family members with you.” If you have a criminal record, you will be barred.
“If you are claiming benefits or need social housing, you will not even be able to apply.
“We are increasing the time before you can apply for a British passport from 12 months to five years. That means it will take at least 15 years to start an application.
“If you enter this country illegally or overstay your visa, you will be banned from ever getting a leave to remain or a passport.”
In next week’s parliamentary debate on the Border Security, Asylum and Immigration Bill, the Tory party will debate whether the changes should be made old-fashioned until 2021.
Speaking to the BBC, Badenoch criticised current immigration rules as a “conveyor belt” for citizenship which “puts pressure on public services”.
“We need to ensure that people who come here have a real, meaningful connection with the UK and therefore do not have criminal records. They need to be net contributors to the economy, not people who are dependent on benefits, who care about our country and our communities,” she said.