Production Release Log

Continuous Architectural Governance & Version History

MyUtilityTools New Zealand maintains an open, auditable public log of all production deployments, statutory rate adjustments, accessibility refinements, and algebraic engine enhancements. All updates are vetted under strict automated unit tests and mathematical verification routines before production release.

Version 1.1 – New Zealand Inland Revenue (IRD) Tax & Benefits Suite

Released: October 2026 • Lead Architect: David Miller (@davidmillercoder)

Deployment of Cluster 1 statutory calculation engines calibrated to current 2025/2026 Inland Revenue guidelines:

  • NZ PAYE & Income Tax Calculator: Implemented progressive 5-tier tax brackets (10.5% to 39%), statutory ACC Earner Levy (1.60% capped at $142,283), KiwiSaver deductions, and secondary tax codes.
  • NZ GST Calculator (15%): Exact dual-mode addition and deduction utilizing the statutory 3/23 tax fraction.
  • KiwiSaver Retirement Calculator: Growth projections covering employee contribution rates (3%, 4%, 6%, 8%, 10%), employer matching, and government annual contributions.
  • Working for Families Calculator: Family Tax Credit, In-Work Tax Credit, and Best Start entitlement estimators based on household income abatement thresholds.
  • NZ Child Support Calculator: IRD formula implementation calculating living allowance, income shares, and child care cost tables.
  • NZ Citizenship Presence Calculator: Verification engine for Department of Internal Affairs (DIA) 1,350 physical presence days and 240 days per year requirement.

Version 1.0 – Foundation Infrastructure & Accessibility Core

Released: October 2026 • Lead Architect: David Miller (@davidmillercoder)

Initial release establishing core performance, compliance, and governance frameworks:

  • Engineered bespoke Tasman Pounamu Jade and Southern Alps Slate high-contrast design system.
  • Verified WCAG 2.1 AAA contrast levels across Light and Dark mode variables.
  • Deployed foundational documentation: About Us, Contact, Methodology, Accessibility, and Editorial Guidelines.
  • Integrated author authority schema linking lead developer David Miller across five verified developer networks.
  • Enforced client-side 100% RAM privacy architecture with zero telemetry.