Child Support Guidelines by State

Compare child support calculation models, age of termination, and deviation factors across all 50 states.

50 States3 data columnsLast updated: 2025-12-01

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State	Calculation Model	Age of Termination	Deviation Factors
AL - Alabama	Income Shares	19	Childcare, insurance, special needs, shared custody
AK - Alaska	Income Shares	18 (19 if in high school)	Healthcare, travel, special needs, other children
AZ - Arizona	Income Shares	18 (19 if in high school)	Childcare, insurance, education, extraordinary expenses
AR - Arkansas	Income Shares	18 (through high school or 19)	Childcare, medical, education, support of other children
CA - California	Income Shares	18 (19 if in high school)	Timeshare, tax filing, hardship, extraordinary income
CO - Colorado	Income Shares	19 (21 if disabled)	Extraordinary medical, childcare, travel, special needs
CT - Connecticut	Income Shares	18 (19 if full-time high school)	Childcare, medical, shared custody, other dependents
DE - Delaware	Melson Formula	18	Primary support needs, standard of living, childcare
FL - Florida	Income Shares	18 (19 if in high school)	Childcare, insurance, timesharing, special needs
GA - Georgia	Income Shares	18 (20 if in high school)	Travel, mortgage, life insurance, extraordinary expenses
HI - Hawaii	Melson Formula	18 (23 if in college per agreement)	Childcare, insurance, exceptional circumstances
ID - Idaho	Income Shares	18 (19 if in high school)	Shared custody, childcare, travel, medical
IL - Illinois	Income Shares	18 (19 if in high school)	Childcare, education, extraordinary medical, shared parenting
IN - Indiana	Income Shares	19 (21 if disabled)	Childcare, education, parenting time credit, other children
IA - Iowa	Income Shares	18 (19 if in high school)	Childcare, medical, special needs, tax consequences
KS - Kansas	Income Shares	18 (through high school)	Childcare, insurance, special needs, income disparity
KY - Kentucky	Income Shares	18 (19 if in high school)	Childcare, insurance, shared custody, special needs
LA - Louisiana	Income Shares	18 (19 if in high school)	Childcare, insurance, extraordinary medical, shared custody
ME - Maine	Income Shares	18 (19 if in high school)	Childcare, transportation, special needs, other support
MD - Maryland	Income Shares	18 (19 if in high school)	Childcare, medical, shared custody, extraordinary expenses
MA - Massachusetts	Income Shares	18 (23 if in college)	Childcare, insurance, education, other support obligations
MI - Michigan	Income Shares	18 (19.5 if in high school)	Childcare, insurance, custody arrangement, special needs
MN - Minnesota	Income Shares	18 (20 if in high school)	Childcare, medical, parenting time, special needs
MS - Mississippi	Percentage of Income	21	Childcare, extraordinary medical, education, seasonal income
MO - Missouri	Income Shares	18 (21 if in higher education)	Childcare, insurance, shared custody, education
MT - Montana	Melson Formula	18 (19 if in high school)	Childcare, insurance, standard of living, special needs
NE - Nebraska	Income Shares	19	Childcare, insurance, special needs, visitation costs
NV - Nevada	Percentage of Income	18 (19 if in high school)	Cost of insurance, childcare, special needs, other children
NH - New Hampshire	Income Shares	18 (through high school)	Childcare, medical, special needs, other obligations
NJ - New Jersey	Income Shares	19 (23 if in college, by agreement)	Childcare, medical, special needs, shared parenting
NM - New Mexico	Income Shares	18 (19 if in high school)	Childcare, insurance, special needs, standard of living
NY - New York	Income Shares	21	Childcare, medical, education, extraordinary expenses
NC - North Carolina	Income Shares	18 (20 if in high school)	Childcare, insurance, extraordinary expenses, support of other children
ND - North Dakota	Income Shares	18 (19 if in high school)	Childcare, insurance, travel, other children
OH - Ohio	Income Shares	18 (19 if in high school)	Childcare, medical, shared parenting, extraordinary expenses
OK - Oklahoma	Income Shares	18 (20 if in high school)	Childcare, insurance, shared custody, special needs
OR - Oregon	Income Shares	18 (21 if in school, by agreement)	Childcare, medical, parenting time, other children
PA - Pennsylvania	Income Shares	18 (through high school)	Childcare, medical, private school, unusual needs
RI - Rhode Island	Income Shares	18 (through high school or 19)	Childcare, insurance, extraordinary expenses, other dependents
SC - South Carolina	Income Shares	18	Childcare, insurance, shared custody, special needs
SD - South Dakota	Income Shares	18 (19 if in high school)	Childcare, medical, shared custody, other dependents
TN - Tennessee	Income Shares	18 (through high school)	Childcare, insurance, parenting days, extraordinary expenses
TX - Texas	Percentage of Income	18 (through high school graduation)	Insurance, childcare, travel, special needs, other children
UT - Utah	Income Shares	18 (through high school)	Childcare, insurance, shared custody, work-related expenses
VT - Vermont	Income Shares	18 (through high school)	Childcare, medical, extraordinary expenses, shared custody
VA - Virginia	Income Shares	18 (19 if in high school)	Childcare, insurance, travel, extraordinary expenses
WA - Washington	Income Shares	18 (through high school or 19)	Childcare, insurance, residential schedule, special needs
WV - West Virginia	Income Shares	18 (20 if in high school)	Childcare, medical, shared custody, other support
WI - Wisconsin	Percentage of Income	18 (19 if in high school)	Childcare, medical, shared custody, serial family obligations
WY - Wyoming	Income Shares	18 (20 if in high school)	Childcare, insurance, special needs, other children

This information is provided for general educational purposes only and may not reflect the most recent legislative changes. Always verify current law with official state sources or consult a licensed attorney in the relevant jurisdiction.