How to write better Python code: Replace multiple elif by what?

what is Pythons best practice for multiple elifs? I would like to write the following function in a more beautiful or structured way. Is there anything like switch case built in? How would a pro structure this? I am still beginner :-) Thanks in advance!

def getThreshold(i=0.00):
    if i <= 500:
        return i * 1.1
    elif i <= 1000:
        return i * 1.4
    elif i <= 2000:
        return i * 1.1
    elif i <= 3000:
        return i
    elif i <= 5000:
        return i * 0.85
    elif i <= 10000:
        return i * 0.7
    elif i <= 20000:
        return i * 0.7
    elif i <= 100000:
        return i * 0.75
    else:
        return i * 0.8