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Expose annual employee CPP/QPP/EI/QPIP contribution variables

Aperta
#556 0 commenti 0 reazioni 0 assegnatari Vedi su GitHub

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Valutazione

Difficoltà
4/5
Tempo stimato
3-5 giorni
Idoneità per principianti
48/100
Tipo di issue
Funzionalità
Chiarezza
Abbastanza chiara
Stato di attività
Tranquilla
Stack tecnologico
python
Ambito
backend

Direzione di ricerca

Start by reading the existing implementations referenced in issues #152, #403, and #527, then compare their parameters and outputs with the linked CRA payroll formulas. Done means stable person-level annual CPP, QPP, EI, and QPIP outputs, covered by the listed edge-case and Quebec/non-Quebec tests, with parameter metadata citing the source.

Scritto dal modello di indicizzazione a partire dal testo della issue.

Descrizione

enhancement

Problem

PolicyEngine Canada does not expose standalone annual employee-liability
variables for:

  • Canada Pension Plan contributions
  • Quebec Pension Plan contributions
  • Employment Insurance premiums
  • Quebec Parental Insurance Plan premiums

These outputs are needed both by downstream disposable-income calculations and
by source-level comparison against CRA payroll formulas. Related work exists in
#152 (CPP), #403 (EI), and #527 (QPP), but QPIP and the common output contract
are not covered.

Scope

  • Add person-level annual employee contribution/premium variables for CPP, QPP,
    EI, and QPIP.
  • Apply province-residence routing between CPP/QPP and EI/QPIP.
  • Parameterize the basic exemption, YMPE, YAMPE, rates, and annual maxima by
    effective year.
  • Represent base and additional CPP/QPP contributions explicitly where needed,
    while also exposing total employee liability.

Acceptance criteria

  • Each program has a stable person-level annual output variable.
  • Tests cover zero earnings, the basic exemption, YMPE, YAMPE, and annual caps.
  • Quebec and non-Quebec cases exercise the correct mutually exclusive pension
    plan and applicable insurance premiums.
  • Parameter metadata cites the current CRA payroll formulas.

Official source:
https://www.canada.ca/en/revenue-agency/services/forms-publications/payroll/t4127-payroll-deductions-formulas/t4127-jan/t4127-jan-payroll-deductions-formulas-computer-programs.html

Lingua principale
Python
Stelle
17
Fork
35
Metriche di merge delle PR
Nessuna PR unita negli ultimi 30g

Preparare l'ambiente

Come iniziare

  1. Leggi tutta la issue e poi la guida ai contributi del progetto.
  2. Commenta sulla issue per dire che te ne occupi tu — evita che due persone facciano lo stesso lavoro.
  3. Fai un fork del repository e lavora su un branch.
  4. Apri una pull request che faccia riferimento al numero della issue.

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