bd-income-tax

Calculate Bangladesh individual income tax in Python or from the command line. It covers the tax bands, the six taxpayer categories, the investment rebate and the minimum tax, and it formats amounts in lakh style or with Bangla digits.

No dependencies. Python 3.9+.

pip install bd-income-tax

Command line

$ bd-income-tax 850000 --investment 100000
Category           General Taxpayer
Total income       ৳8,50,000
Tax-free income    ৳3,75,000
Taxable income     ৳4,75,000

    10%     3,75,001 – 6,75,000         ৳30,000
    15%     6,75,001 – 10,75,000        ৳26,250

Gross tax          ৳56,250
Investment rebate  -৳15,000
Tax payable        ৳41,250
Effective rate     4.85%
Net income         ৳8,08,750

Options:

Several income amounts are added together: bd-income-tax 600000 250000.

Python

from bd_income_tax import calculate, format_bdt

result = calculate(
    income={"salary": 800_000, "house_rent": 50_000},
    investment={"sanchaypatra": 60_000, "dps": 40_000},
    category="female",
)
result.tax_payable          # 33750
result.breakdown.bands      # tax charged in each band
result.rebate.amount        # 15000
result.to_dict()            # JSON-ready
format_bdt(result.net_income, symbol=True)  # '৳8,16,250'

Other helpers:

• calculate_tax(income, category): gross tax by band, before rebate
• calculate_rebate(income, investment): the investment rebate
• format_bdt, format_bangla, to_bangla_digits: lakh/crore and Bangla number formatting
• future_value(principal, monthly_deposit, annual_rate_pct, months) and emi(principal, annual_rate_pct, months): DPS and loan maths

Rules used

These rules apply to assessment years 2026-27 and 2027-28. They match the bd-income-tax-calculator web app.

Tax-free income by category

Tax bands, applied to income above the tax-free amount:

Investment rebate: the lowest of 3% of total income, 15% of eligible investment, or ৳10,00,000.

Minimum tax: anyone whose income is above their tax-free amount pays at least ৳5,000.

Not covered: the wealth surcharge, which depends on net-wealth details.

Tax law changes with every Finance Act. Use this package as an estimate and check the latest NBR rules before you file.

License

MIT