% of Maintenance for older Home/Apt

[Emory Clayton]

Newbie here, was wanting some insight on what to use as a % for maintenance when running a rental report using the Bigger Pockets Rental Property Calculator. I've learned typically you use 5% as a general rule, however this duplex being much older (1920), I was curious to know what others use for this. The property has been rehabbed and looks to be in great shape, but I'm aware with older properties the cost of maintenance is higher. Any suggestions are appreciated