Once your rent or bill payment comes out of your bank account, Rent+Bills typically finds and reports your payment to the credit bureaus within the next 24 hours. After that, it can sometimes take the credit bureaus up to 1 month to add the info to your credit reports.
At this time, Rent+Bills reports rent payments to Experian, Equifax and TransUnion and bill payments like gas, electric, water, and cell phone to TransUnion.