Add Hawaii TANF Program

[hua7450]

Summary

Implements Hawaii's Temporary Assistance for Needy Families (TANF) program.

Closes #7047

Regulatory Authority

• Hawaii TANF State Plan (Effective October 1, 2023)

Income Eligibility Tests

Gross Income Test

• Threshold: 185% of Standard of Need (SON)
• SON = 100% of 2006 Hawaii Federal Poverty Level (frozen since July 2007)

Household Size	SON (Monthly)	Gross Limit (185%)
1	$939	$1,737
2	$1,265	$2,340
3	$1,590	$2,941
4	$1,916	$3,544
5	$2,242	$4,147

Source: Hawaii TANF State Plan Section 10.1 (page 19)

Income Deductions & Exemptions

Applied to earned income only, in this order:

1. 20% Standard Deduction
2. $200 Flat Rate Deduction
3. 55% Earned Income Disregard (months 1-24)

Source: Hawaii TANF State Plan Section 10.2.1 (page 19)

Dependent Care Deduction

• Full-time (32+ hrs/week): $175 per child
• Part-time (<32 hrs/week): $165 per child

Source: Hawaii TANF State Plan Section 10.2.2 (page 20)

Income Standards

Standard of Assistance (SOA) = 48% of Standard of Need

Household Size	SON	SOA (48%)
1	$939	$450.72
2	$1,265	$607.20
3	$1,590	$763.20
4	$1,916	$919.68
5	$2,242	$1,076.16

Source: Hawaii TANF State Plan Section 11.1 (page 22)

Benefit Calculation

Benefit = Standard of Assistance - Countable Income

• Benefit floored at $0
• NOTE: SOA is reduced by 20% after the family receives their initial two full months of benefits for mandatory work-required households. This reduction cannot be modeled as PolicyEngine cannot track cumulative months of benefit receipt.

Source: Hawaii TANF State Plan Section 11.1 (page 22)

Implementation Notes

• Simplified approach: Uses federal baseline for demographic eligibility and gross income sources
• Asset test: Disregarded since April 2013
• Non-simulatable rules: 60-month lifetime limit, EIDR tier based on months (55% for months 1-24, 36% after), 20% SOA reduction after 2 months

Test Coverage

• 73 tests covering eligibility, income calculations, and benefit amounts
• Integration tests validate complete benefit calculation pipeline

Example Calculation

Family of 2 with $1,500 monthly earned income:

Step	Calculation	Amount
Gross Earned Income		$1,500
20% Standard Deduction	$1,500 × 0.20	-$300
After Standard		$1,200
Flat Rate Deduction		-$200
After Flat		$1,000
55% EIDR	$1,000 × 0.55	-$550
Countable Earned		$450
SOA (size 2)		$607.20
Benefit	$607.20 - $450	$157.20

🤖 Generated with Claude Code

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (fd6b2c5) to head (50f4942).
⚠️ Report is 68 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff            @@
##              main     #7048   +/-   ##
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  Coverage   100.00%   100.00%           
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  Files           11         9    -2     
  Lines          146       127   -19     
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- Hits           146       127   -19     

Flag	Coverage Δ
unittests	100.00% <100.00%> (ø)

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