The main theme of Labour’s conference is taking the fight to Reform UK, which is leading in UK-wide national opinion polls.
In her speech, Mahmood is also expected to say patriotism “is turning into something smaller, something more like ethno-nationalism”.
Mahmood will argue that “fair migration” and secure borders are integral parts of an “open, generous, tolerant” country.
She will tell party members “you won’t always like what I do”.
But she will warn them if the Labour government does not succeed, “working people will turn away from us” and “seek solace in the false promises” from Nigel Farage’s party.
Mahmood will also speak about her parents’ experience of arriving in the UK, arguing the acceptance of migrants depends on their contribution to local communities.
She will talk about how she was a victim of shoplifting, when she worked behind the counter of her family’s corner shop as a child, and why that has motivated her to crack down on theft.
The home secretary will launch a “winter of action” scheme in a bid to tackle shoplifting.
This will entail police forces across the country working in partnership with local businesses.