BD Tax AY 2026–27
Bangladesh Individual Tax — Fully Dynamic (AY 2026–27)
Annual mode computes slab tax + section 78 rebate + minimum tax + surcharge (wealth bands + triggers) + net payable after credits. Monthly mode computes recommended TDS by spreading remaining annual payable across remaining months.

🧾 Taxpayer & Surcharge Inputs

Tax setup
Rules are embedded for AY 2026–27.
Affects minimum tax (automated).
Tax-free threshold
Adds to tax-free threshold (if applicable).
Computed threshold: —
Surcharge data
Used to pick surcharge band.
Computed surcharge rate: —

💼 Income lines (all heads)

Add incomes
Add each source separately and select how it is treated for slab/rebate.
Treatments: Regular slab (included in slab + ‘ক’), Reduced rate (taxed at rate%, excluded from ‘ক’), Final tax (excluded from slab + ‘ক’, shown separately), Exempt (excluded), Firm/AOP share (taxed as regular slab but excluded from ‘ক’).
Credits
Offsets payable tax (do not include “final tax” as credit unless your policy treats it so).

🏦 Section 78 Rebate (Investments/Expenses)

Eligible ‘খ’
Enter eligible investments/expenditures (Sixth Schedule Part 3). If you already computed total eligible ‘খ’, use override.
If filled, the calculator uses this as ‘খ’.
Rebate = min(0.03בক’, 0.15בখ’, 10,00,000). (‘ক’ is auto-computed from your income-line treatments.)

📊 Detailed breakdown

Press Calculate to see slab, rebate, minimum tax, surcharge, and payable steps.
Net payable (after credits)
BDT 0
Add income lines and calculate.
Tax-free threshold
—
Total income (all)
—
Regular slab income
—
Reduced-rate tax
—
Slab tax
—
Section 78 ‘ক’
—
Section 78 ‘খ’
—
Rebate
—
Tax after rebate
—
Minimum tax applied
—
Surcharge
—
Credits used
—
Final-tax (info)
—

🔗 Legal basis

Section 78 (rebate) definition: bdlaws section 78
Slab/min-tax/surcharge values in this file are set for AY 2026–27 and can be updated later in one “rule pack” JSON inside the script.

🧮 Monthly Salary TDS (dynamic)

Salary basis
If you have other income, add it below (annual).
Timing
Rebate inputs reused
Monthly TDS uses the same section-78 investment inputs from Annual tab (‘খ’). Update them there and click Calculate here.

Notes

This spreads remaining estimated annual payable across remaining months (planning view). Employers may require evidence before reflecting rebate/exemptions in withholding.
Recommended monthly TDS
BDT 0
Enter inputs and calculate.
Annual income used
—
Annual payable (before already deducted)
—
Already deducted
—
Remaining payable
—
Months remaining
—

Uses same taxpayer setup

Category, new taxpayer, disabled-child extra, wealth & triggers are taken from Annual tab.
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