Implement Guaranteed Income Supplement (GIS)#522
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MaxGhenis wants to merge 2 commits intoPolicyEngine:masterfrom
Open
Implement Guaranteed Income Supplement (GIS)#522MaxGhenis wants to merge 2 commits intoPolicyEngine:masterfrom
MaxGhenis wants to merge 2 commits intoPolicyEngine:masterfrom
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Add the Guaranteed Income Supplement, a key component of Canada's retirement income system for low-income seniors. Features: - GIS eligibility based on OAS eligibility and income thresholds - Income-tested benefit with 50% reduction rate - Support for single and coupled seniors (basic implementation) - Maximum monthly benefits: $1,097.75 (single), $660.78 (couple both OAS) for 2025 - Comprehensive test coverage Implementation notes: - GIS income excludes OAS and GIS payments - Benefits phase out completely at twice the maximum amount - Simplified couple handling (assumes both receive OAS) - TODO: Add support for other couple scenarios (spouse no OAS, Allowance) This implementation addresses issue PolicyEngine#98 and brings PolicyEngine Canada closer to SPSD/M coverage. 🤖 Generated with [Claude Code](https://claude.ai/code) Co-Authored-By: Claude <noreply@anthropic.com>
- Fix household income aggregation for couples (use household.sum) - Add couple test cases to verify household income aggregation works - Update test documentation with correct parameter values - Income source expansion already has placeholders for CPP, pensions, etc. 🤖 Generated with [Claude Code](https://claude.ai/code) Co-Authored-By: Claude <noreply@anthropic.com>
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Summary
This PR implements the Guaranteed Income Supplement (GIS), a key component of Canada's retirement income system that provides additional support to low-income seniors receiving Old Age Security (OAS).
Implementation Details
Features
Components Added
Parameters:
Variables:
gis_eligible: Determines eligibility based on OAS status and incomegis_income: Calculates income for GIS purposes (excludes OAS/GIS)gis: Main benefit calculation with income testingis_single: Helper variable to determine household compositionTests: 14 comprehensive test cases covering:
Implementation Notes
benefitsaggregator variableTODO/Future Enhancements
Testing
All tests pass:
References
Fixes #98
🤖 Generated with Claude Code
Co-Authored-By: Claude noreply@anthropic.com