HS Code 28391100
Sodium Metasilicates
Worked example
On an assessable value of BDT 100,000, the total duty and taxes payable on 28391100 would be approximately BDT 39,750.00, because the Total Tax Incidence is 39.75% of the assessable value.
What these figures mean
Sodium Metasilicates is classified under HS code 28391100, which sits in heading 2839 (Silicates; commercial alkali metal silicates) of chapter 28 (Inorganic chemicals; compounds of precious metals, rare-earth metals, radioactive elements or isotopes).
Under the Bangladesh Operative Tariff 2026-2027 this line attracts Customs Duty of 10%, Supplementary Duty of 0%, VAT of 15%, Advance Income Tax of 5%, Regulatory Duty of 0% and Advance Tax of 7.5%. Combined, these produce a Total Tax Incidence of 39.75%, which is the figure to multiply by the assessable value of your consignment.
The assessable value is normally the CIF value of the goods plus landing charges. Duties and taxes are applied in a defined order rather than simply added together, which is why the TTI is not the plain sum of the individual rates.
Recorded imports
Between December 2025 and May 2026, NBR recorded commercial imports under 28391100 in 6 of 6 months, totalling 1,304,781 kg at an assessable value of BDT 60,128,888. That is an average of BDT 46 per kilogram — useful as a rough check on whether a declared value looks plausible. In May 2026 it was the 1,204th largest of 4,066 tariff lines by assessable value.
| Month | Net weight | Assessable value | Per kg |
|---|---|---|---|
| December 2025 | 107,050 kg | BDT 4,894,134 | BDT 46 |
| January 2026 | 111,200 kg | BDT 5,641,611 | BDT 51 |
| February 2026 | 109,681 kg | BDT 8,847,075 | BDT 81 |
| March 2026 | 258,000 kg | BDT 10,588,767 | BDT 41 |
| April 2026 | 260,500 kg | BDT 11,393,559 | BDT 44 |
| May 2026 | 458,350 kg | BDT 18,763,742 | BDT 41 |
Bonded imports. A further 108,000 kg worth BDT 4,852,949 entered under the bonded-warehouse regime in the same period — goods brought in duty-free as inputs on the undertaking that they leave again as exports, which in Bangladesh overwhelmingly means ready-made garments. Bonded entries account for 7.5% of the total value imported under this code, the rest entering commercially.
Import figures: NBR Import Statements (IM-4 commercial, IM-7 bonded), December 2025 – May 2026. Assessable value is the customs value on which duty is charged, not the retail or invoice price.
Source: NBR Operative Tariff 2026-2027. The full schedule was reconciled against NBR's online duty calculator before publication; figures were last checked against NBR's live operative tariff search on 10 October 2026.
How this line compares
Chapter 28 contains 200 tariff lines, averaging 38.13%. At 39.75%, 28391100 sits above that average by 1.62 percentage points. It is the 12th most heavily taxed line in the chapter.
Across the whole Operative Tariff the mean is 61.08%, so this line is cheaper than the typical import by 21.33 points.
No supplementary duty applies here, which is the normal case — SD is zero on 78% of the tariff. Where it does apply it usually dominates every other component.