Turkish Legal Algorithms in TypeScript: Modeling Law No. 7596 (MKK FIFO & PBLK), Balthazard Disability, and Law No. 6772

A developer at Koptay Hukuk Bürosu in Ankara released turk-hukuk-hesaplama, a zero-dependency npm package that implements deterministic Turkish legal and actuarial calculations in TypeScript. The package covers Law No. 7596 MKK FIFO net-principal fund liquidation with a TRY 1,000,000 interim cap, Balthazard disability rate calculation, and Law No. 6772 additional-payment payroll, and is accompanied by Sphinx documentation, a Hugging Face dataset, and a DOI-registered monograph.

When building deterministic legal calculators in JavaScript and TypeScript, subtle statutory rules matter as much as arithmetic precision. While developing open-source calculation tools for https://dev.tourl Koptay Hukuk Bürosu https://koptay.av.tr/ in Ankara, we extracted the core deterministic formulas into a zero-dependency NPM package: turk-hukuk-hesaplama https://www.npmjs.com/package/turk-hukuk-hesaplama , accompanied by full Sphinx technical documentation on Read the Docs https://muratcankoptaygithubio.readthedocs.io/tr/latest/ , an open dataset on Hugging Face https://huggingface.co/datasets/koptay/turk-hukuku-ve-7596-fon-tasfiye-veri-seti , and a DOI-registered legal monograph 10.5281/zenodo.24119703 https://doi.org/10.5281/zenodo.24119703 . In this article, we break down the TypeScript implementation of three heavily used Turkish statutory and actuarial algorithms. npm install turk-hukuk-hesaplama All browser-ready interactive calculators using these methodologies are also available live at Turkish Legal Calculation Tools koptay.av.tr/hesaplama-araclari https://koptay.av.tr/hesaplama-araclari . calculateLaw7596Fifo Following the Capital Markets Board of Türkiye SPK suspension of 131 investment funds on 17 September 2026 and the enactment of Law No. 7596 Tasfiyesine Karar Verilen Bazı Yatırım Fonları Hakkında Kanun , investor payouts shifted from unit share valuation to MKK FIFO Net Principal with a TRY 1,000,000 conditional interim cap per fund. For investors whose pre-suspension redemption orders remained unsettled in PBLK blocked status at MKK/Takasbank, computing the litigation gap requires comparing net FIFO principal, the interim payment cap, and the 17.09.2026 accrued redemption/NAV baseline: js import { calculateLaw7596Fifo } from "turk-hukuk-hesaplama"; const result = calculateLaw7596Fifo { totalCashIn: 3 500 000, pastRedemptions: 500 000, navOrPblkValue: 5 200 000 } ; console.log result ; // { // fifoNetPrincipal: 3000000, // interimPayment: 1000000, // blockedPrincipal: 2000000, // totalLitigationClaim: 4200000, // ytm2026Cap: 2065145 // } Further legal methodology and full interactive simulations including TÜFE/Yİ-ÜFE indexation and withholding tax rules : calculateBalthazard Under the Turkish Adult Disability Assessment Regulation Ek-2 Cetveli , multiple medical impairment percentages from traffic or workplace accidents are never summed linearly. Instead, each subsequent impairment reduces the remaining healthy capacity sequentially after sorting from highest to lowest, with an additional 10% Balthazard factor applied if age exceeds 60: js import { calculateBalthazard } from "turk-hukuk-hesaplama"; const disabilityRate = calculateBalthazard 25, 18 , 42 ; console.log disabilityRate ; // 38.5 calculateIlaveTediye6772 Permanent public-sector workers under Law No. 6772 receive 52 days of annual statutory bonus İlave Tediye paid in 4 installments of 13 days each, subject to 14% SGK employee premium, 1% unemployment insurance, cumulative income tax bracket, and 0.759% stamp tax: js import { calculateIlaveTediye6772 } from "turk-hukuk-hesaplama"; const payroll = calculateIlaveTediye6772 1450, 0.20, 13 ; console.log payroll.net ; // 12674.93