Evidence
Calculation verification
Every figure below was calculated by hand from the published band table before the engine was run. The table shows the expected result, the engine’s current result, and whether they match. The same cases run in the automated test suite on every build.
8 of 8 cases match · Last reviewed 1 November 2026
| Case | Gross | Tax | Deductions | Net | Result |
|---|---|---|---|---|---|
| Pakistan · First band boundary0% on the first PKR 600,000.2026-2027 · Finance Act 2026 | PKR 600,000 | PKR 0 | — | PKR 600,000 | Match |
| Pakistan · Top band boundaryFixed tax of PKR 1,424,000 at the PKR 7,000,000 threshold.2026-2027 · Finance Act 2026 | PKR 7,000,000 | PKR 1,424,000 | — | PKR 5,576,000 | Match |
| India · Section 87A rebateINR 75,000 standard deduction leaves 1,125,000 taxable; the 60,000 rebate cancels the 52,500 slab tax.2026-2027 · Union Budget 2026-27 | INR 1,200,000 | INR 0 | — | INR 1,200,000 | Match |
| India · New regime, above rebate93,750 slab tax plus 4% cess of 3,750.2026-2027 · Union Budget 2026-27 | INR 1,500,000 | INR 97,500 | — | INR 1,402,500 | Match |
| United Kingdom · Personal allowance boundaryIncome equal to the 12,570 personal allowance; no NI above the primary threshold.2026-2027 · GOV.UK 2026-27 | GBP 12,570 | GBP 0 | — | GBP 12,570 | Match |
| United Kingdom · Basic rate with NI7,486 income tax plus 2,994 National Insurance.2026-2027 · GOV.UK 2026-27 | GBP 50,000 | GBP 10,480 | — | GBP 39,520 | Match |
| United States · Single filer with FICA7,670 federal income tax plus 4,650 Social Security and 1,087.50 Medicare.2026 · IRS Revenue Procedure 2025-32 | USD 75,000 | USD 13,408 | — | USD 61,593 | Match |
| China · IIT plus social insurance and housing fundIIT of 32,984.52 plus 41,935.32 social insurance and 47,926.08 housing fund.2026 · State Taxation Administration 2026 | CNY 399,384 | CNY 32,985 | CNY 89,861 | CNY 276,538 | Match |
What these cases cover
- Band boundaries: the point where a new rate starts.
- Rebates and allowances that reduce tax to zero.
- Payroll contributions and separately modelled deductions.
- Reconciliation: gross − tax − deductions = net.
Run the numbers yourself
Open the country calculator and enter any of the gross figures above; the band-by-band breakdown should reproduce the table.
Countries covered: Pakistan, India, United Kingdom, United States, China. Cases are added when a rule changes and remain part of the automated test suite.