Rules should be traceable
These are the source records currently embedded in the calculation engine.
Income Tax Department, Government of India
Income-tax Act, 2025 — Section 202 (new tax regime)
Open official source ↗Last verified: 2026-09-16Income Tax Department, Government of India
Income-tax Act, 2025 — Section 19 (salary deductions)
Open official source ↗Last verified: 2026-09-16Income Tax Department, Government of India
Income-tax Act, 2025 — Sections 155–156 (rebates and marginal relief)
Open official source ↗Last verified: 2026-09-16Income Tax Department, Government of India
Income-tax Act, 2025 — Section 516 (rounding to nearest ₹10)
Open official source ↗Last verified: 2026-09-16Income Tax Department, Government of India
Budget 2026 FAQs — rates of income-tax
Open official source ↗Last verified: 2026-09-16Income Tax Department, Government of India
Employees — Benefits allowable (HRA formula)
Open official source ↗Last verified: 2026-09-16Ministry of Labour & Employment, Government of India
Labour Codes FAQ — 50% allowance rule and statutory wages
Open official source ↗Last verified: 2026-09-16Ministry of Labour & Employment, Government of India
Code on Social Security, 2020 — Section 53 (gratuity)
Open official source ↗Last verified: 2026-09-16Ministry of Labour & Employment, Government of India
Additional FAQs on Labour Codes — gratuity and fixed-term employees
Open official source ↗Last verified: 2026-09-16Employees' Provident Fund Organisation, Government of India
EPFO Annual Report 2023-24 — coverage, wage ceiling and 12%/10% contribution rates
Open official source ↗Last verified: 2026-09-16Employees' Provident Fund Organisation, Government of India
Employer Information Booklet — contribution rates
Open official source ↗Last verified: 2026-09-16Maharashtra Goods and Services Tax Department
Schedule of Rates of Tax on Professions, Trades, Callings and Employments
Open official source ↗Last verified: 2026-09-16Commercial Taxes Department, Government of Karnataka
Professional Tax FAQ and 2025 amendment
Open official source ↗Last verified: 2026-09-16Commercial Taxes Department, Government of Telangana
Professional Tax Schedule
Open official source ↗Last verified: 2026-09-16Greater Chennai Corporation
Revenue Department — half-yearly profession tax rates
Open official source ↗Last verified: 2026-09-16