Bangladesh Income Tax Calculator 2024–25
A free, accurate income tax calculator for Bangladeshi salaried professionals — computes tax liability, investment rebates, and net payable under the 2024-25 NBR tax slabs.
Project Overview
The Bangladesh Income Tax Calculator 2024-25 is a free, accurate, self-service tax computation tool built specifically for Bangladeshi salaried professionals. It addresses a genuine gap in the market: while the NBR publishes tax slab rules, there was no clean, up-to-date, mobile-friendly tool that combined slab computation with investment rebate calculation in a single workflow. The calculator is built as a fully client-side React application with TypeScript, ensuring type-safe tax logic that mirrors the 2024-25 NBR guidelines exactly. Users enter their monthly basic salary and the tool automatically derives gross income by computing standard allowances: house rent allowance (50% of basic), medical allowance, conveyance allowance, and festival bonuses. The annual gross is then subjected to the progressive NBR tax slabs — 0%, 5%, 10%, 15%, 20%, and 25% — based on applicable income thresholds for individual male, female, and senior citizen taxpayers. A key differentiator is the investment rebate module. Bangladeshi tax law allows significant rebates on investments in qualifying instruments: life insurance premiums, Deposit Pension Scheme (DPS) contributions, Bangladesh Government savings certificates (Sanchayapatra), and mutual fund units. The tool computes the maximum allowable investment base (25% of gross income or BDT 10 million, whichever is lower), applies the 15% rebate rate, and deducts it from gross tax liability to arrive at the final net tax payable. The UX is deliberately simple — real-time calculation updates as users type, with a clear breakdown table showing each computation step. No signup required, no data leaves the browser, and the result is printable for documentation purposes. The tool was built with salaried employees in banking, technology, garments, and government sectors in mind, where structured monthly salaries and standard allowances are the norm. Deployed on Vercel with sub-second load times, the calculator serves individuals, HR teams, and finance professionals across Bangladesh who need a reliable self-service tax tool during the July–November submission window.
The Challenge
Bangladeshi salaried employees — particularly those in private sector jobs — struggle to accurately compute their annual income tax liability under the National Board of Revenue (NBR) tax slab structure. Most available tools are either outdated, incomplete (missing rebate calculations), or require an accountant. Tax season becomes stressful and expensive for individuals who just need a reliable, self-service calculator that reflects current 2024-25 rules.
The Solution
Built a fully client-side income tax calculator using React and TypeScript that implements the complete 2024-25 NBR tax slab logic for individual taxpayers. The tool handles gross salary computation from monthly inputs, calculates allowances (house rent, medical, conveyance, festival bonus), determines tax liability across progressive slabs, and then computes investment tax rebates across all qualifying instruments — DPS, life insurance, savings certificates, and mutual funds — to arrive at the final net tax payable. All computation runs in the browser with no server calls, ensuring privacy. Deployed on Vercel for instant global access.
Key Features
Technologies Used
Project Impact
Covers full 2024-25 NBR tax slab logic including all progressive tiers
Investment rebate calculation across 4 qualifying instrument categories
Fully client-side — zero data stored, completely private for users
Mobile-first design serving BD job holders across all sectors
Instant real-time computation with printable tax summary output
Free, no-signup tool filling a genuine gap in the BD fintech space