amortization 3.0.0

Python library for calculating amortizations and generating amortization schedules

License		Version
Github Actions		Coverage
Supported versions		Wheel
Status		Downloads

amortization

Python library for calculating amortizations and generating amortization schedules

Installation

pip install amortization
pip install amortization[cli]

Usage

Python

Amortization Amount

from amortization.amount import calculate_amortization_amount

amount = calculate_amortization_amount(150000, 0.1, 36)

Amortization Period

from amortization.period import calculate_amortization_period

period = calculate_amortization_period(150000, 0.1, 4840.08)

Amortization Schedule

from amortization.schedule import amortization_schedule

for number, amount, interest, principal, balance in amortization_schedule(150000, 0.1, 36):
    print(number, amount, interest, principal, balance)

Amortization Schedule (using tabulate)

from amortization.schedule import amortization_schedule
from tabulate import tabulate

table = (x for x in amortization_schedule(150000, 0.1, 36))
print(
    tabulate(
        table,
        headers=["Number", "Amount", "Interest", "Principal", "Balance"],
        floatfmt=",.2f",
        numalign="right"
    )
)

Command line

amortize -h
usage: amortize [-h] -P PRINCIPAL -r INTEREST_RATE [-s] [-f {daily,weekly,biweekly,semimonthly,monthly,quarterly,semiyearly,yearly}] (-n PERIOD | -a AMOUNT)

Python library for calculating amortizations and generating amortization schedules

options:
  -h, --help            show this help message and exit
  -s, --schedule        Generate amortization schedule
  -f, --frequency {daily,weekly,biweekly,semimonthly,monthly,quarterly,semiyearly,yearly}
                        Payment frequency
  -n, --period PERIOD   Total number of periods
  -a, --amount AMOUNT   Amortization amount per period

required arguments:
  -P, --principal PRINCIPAL
                        Principal amount
  -r, --interest-rate INTEREST_RATE
                        Interest rate per year

amortize -P 150000 -n 36 -r 0.1             # period
amortize -P 150000 -n 36 -r 0.1 -s          # schedule
amortize -P 150000 -a 4840.08 -r 0.1        # amount
amortize -P 150000 -n 36 -r 0.1 -f weekly   # period (specify payment frequency)

% amortize -P 150000 -n 36 -r 0.1 -s           
Number        Amount    Interest    Principal     Balance
--------  ----------  ----------  -----------  ----------
1           4,840.08    1,250.00     3,590.08  146,409.92
2           4,840.08    1,220.08     3,620.00  142,789.92
3           4,840.08    1,189.92     3,650.16  139,139.76
4           4,840.08    1,159.50     3,680.58  135,459.18
5           4,840.08    1,128.83     3,711.25  131,747.93
6           4,840.08    1,097.90     3,742.18  128,005.75
7           4,840.08    1,066.71     3,773.37  124,232.38
8           4,840.08    1,035.27     3,804.81  120,427.57
9           4,840.08    1,003.56     3,836.52  116,591.05
10          4,840.08      971.59     3,868.49  112,722.56
11          4,840.08      939.35     3,900.73  108,821.83
12          4,840.08      906.85     3,933.23  104,888.60
13          4,840.08      874.07     3,966.01  100,922.59
14          4,840.08      841.02     3,999.06   96,923.53
15          4,840.08      807.70     4,032.38   92,891.15
16          4,840.08      774.09     4,065.99   88,825.16
17          4,840.08      740.21     4,099.87   84,725.29
18          4,840.08      706.04     4,134.04   80,591.25
19          4,840.08      671.59     4,168.49   76,422.76
20          4,840.08      636.86     4,203.22   72,219.54
21          4,840.08      601.83     4,238.25   67,981.29
22          4,840.08      566.51     4,273.57   63,707.72
23          4,840.08      530.90     4,309.18   59,398.54
24          4,840.08      494.99     4,345.09   55,053.45
25          4,840.08      458.78     4,381.30   50,672.15
26          4,840.08      422.27     4,417.81   46,254.34
27          4,840.08      385.45     4,454.63   41,799.71
28          4,840.08      348.33     4,491.75   37,307.96
29          4,840.08      310.90     4,529.18   32,778.78
30          4,840.08      273.16     4,566.92   28,211.86
31          4,840.08      235.10     4,604.98   23,606.88
32          4,840.08      196.72     4,643.36   18,963.52
33          4,840.08      158.03     4,682.05   14,281.47
34          4,840.08      119.01     4,721.07    9,560.40
35          4,840.08       79.67     4,760.41    4,799.99
36          4,839.99       40.00     4,799.99        0.00
Totals    174,242.79   24,242.79   150,000.00

Dependencies

tabulate (optional, required for CLI)

Author

Ronie Martinez

References

• Amortization Calculation Formula
• Amortization Period Formula