money.py

money = 200 	                   # Starting money
money_invested = 1.0   	# Percentage of money invested (1.0) for everything
yearly_income = 1000      	# Yearly income
taxfree_income = 500
yearly_spending = 1000   	# Amount spent yearly
annual_return = 0.03        	# Annual return for invested money (0.05) for 5%
period = 4                          	# Time period to calculate for


ic = 0    # income class, dont change!

def tax(income):
    global ic
    
    if income < 8130:
        ic = 1
        return 0
    elif income < 13470:
        ic = 2
        y = (income - 8130) / 10000
        return (933.7 * y + 1400) * y
    elif income < 52882:
        ic = 3
        z = (income - 13469) / 10000
        return (228.74 * z + 2397) * z + 1014
    elif income < 250731:
        ic = 4
        x = income
        return 0.42 * x - 8196
    ic = 5
    return 0.45 * x - 15718

for i in range(0, period):
    print("After {} years: {}".format(i, money))
    
    brutto_income = money * money_invested * annual_return + yearly_income - yearly_spending
    oic = ic
    netto_income = brutto_income - tax(brutto_income)
    if ic > oic:
        print("Upgrade to income class {}".format(ic))
    money = money + netto_income + taxfree_income

print("Final amount: {}".format(money))