Declare the hash inside the loop instead of outside.
Borrowing from tollic's example.

use warnings;
use strict;

my @array_of_hash;
for (1..3) {
    my %hash = (
        'name'    => $_,
        'payment' => $_,
    );
    push @array_of_hash, \%hash;
}
use Data::Dumper; $Data::Dumper::Sortkeys=1; print Dumper(\@array_of_h
+ash);
[download]

Outputs:

$VAR1 = [
          {
            'name' => 1,
            'payment' => 1
          },
          {
            'name' => 2,
            'payment' => 2
          },
          {
            'name' => 3,
            'payment' => 3
          }
        ];
[download]