mortgagecalculator
Python script for calculating (and simulating) monthly payments of any loan like mortgage for example.
Script arguments:
- -v / --value ; credit value
- -p / --percentage ; interest rate
- -l / --length ; loan term - in months
- -c / --commission ; credit commission
- -t / --credittype ; equal or decreasing installments
- -e / --excesspayments ; additional capital
- plt / --plots ; draw plots (matplotlib required)
Usage
Equal installment
python3.8 mortgage.py -v 20000 -p 0.04 -l 5 -t 0
Output
Loan installments:
1. installment: 4040.09, interest: 66.67, capital: 3973.42, excess: 0.00
2. installment: 4040.09, interest: 53.42, capital: 3986.67, excess: 0.00
3. installment: 4040.09, interest: 40.13, capital: 3999.96, excess: 0.00
4. installment: 4040.09, interest: 26.80, capital: 4013.29, excess: 0.00
5. installment: 4040.09, interest: 13.42, capital: 4026.67, excess: 0.00
(...)
Calculation:
- Loan real value: 20200.44
- Costs: 200.44
- Fees vs value percent=1.00
Decreasing installment
python3.8 mortgage.py -v 20000 -p 0.04 -l 5 -t 1
Output
Loan installments:
1. installment: 4066.67, interest: 66.67, capital: 4000.00, excess: 0.00
2. installment: 4053.33, interest: 53.33, capital: 4000.00, excess: 0.00
3. installment: 4040.00, interest: 40.00, capital: 4000.00, excess: 0.00
4. installment: 4026.67, interest: 26.67, capital: 4000.00, excess: 0.00
5. installment: 4013.33, interest: 13.33, capital: 4000.00, excess: 0.00
(...)
Calculation:
- Loan real value: 20200.00
- Costs: 200.00
- Fees vs value percent=1.00
Using switch -plt / --plots you can draw installment schedule:
